75 results about "Methanol" patented technology

The invention relates to a method for directly preparing propylene from crude methanol, wherein, in an integrated unit for preparing the methanol and preparing the propylene from the methanol, the crude methanol directly enters a multistage adiabatic fixed bed reactor loaded with an acid molecular sieve catalyst without rectification and purification to prepare low carbon olefin with the propyleneas a main component. In the method, steam and circulating hydrocarbon as diluent, and a mixture of the crude methanol and water is used for interstage cold shock to control reaction temperature of the reactor in each stage. The method helps obtain high propylene yield, and obviously reduce investment and energy consumption of the integrated unit for preparing the methanol and preparing the propylene from the methanol.

The invention provides compound fruit fragrance and flower fragrance essence for daily chemicals and a preparation method thereof. The essence is mainly prepared from 1-acetoxy-2-tert-butylcyclohexane, linalool, lilialdehyde, hexyl acetate, rosalin, benzyl acetate, cyclamen aldehyde, alpha-hexylcinnamaldehyde, APHERMATE IFF, galaxolide 50, geranyl acetate 600, ambrotone, isovalerate, florhydral, triplal, ebanol, delta-damascone, delta-decalactone, diphenyl ether, geraniol 600, benzyl alcohol, bodhi flower ester, peach aldehyde, tonalid, p-methyl anisole, methyl benzoate, beta-ionone, butyl butyryllactate, guaiac wood oi1, musk-T, TRIMOFIX O TT IFF, seti wood wool, red apple bases, benzyl salicylate, raspberry ketone, vanillin propylene glycol acetal, super piperonal, phenylethyl alcohol, melonal, green flower Finn, Guojing, Hailanjing and 2-hydroxymethylethoxy. The compound fruit fragrance and flower fragrance essence has good stability in perfuming media, the fragrance emitted by the essence is natural and full, and the essence can be applied to various daily chemical products.

The invention relates to a fluorosilicon waterproof oil repellent, and a synthesis method and application thereof. The synthesis method comprises the following steps: (1) mixing sodium borohydride, a simple substance iodine and 1/4 of perfluorinated polyether; slowly and dropwisely adding the rest 3/4 of perfluorinated polyether into the mixed solution, and reacting to obtain perfluorinated polyether methanol; (2) continuing adding bromopropylene and potassium carbonate, and reacting to obtain allyl perfluorinated polyether; and (3) mixing the allyl perfluorinated polyether, alkoxy silane and a platinum catalyst, and reacting to obtain the target product trialkoxysilylpropyl perfluorinated polyether. The fluorosilicon waterproof oil repellent is applicable to various glass panels, can easily form a film on the premise of ensuring the laminating effect, can obviously increase the scratch resistance of the protective film, and enables the protective film to have the waterproof, anti-fingerprint and oil-repellent functions. Besides, the film is very smooth, and thus, the fluorosilicon waterproof oil repellent has wide application prospects in high-end fields.

The invention relates to a catalyst for ternary copolymerization of norbornenes, tetrafluoroethylene and pentenes and a ternary copolymerization method. The catalyst is characterized in that the catalyst is prepared through the following method comprising the steps of: dissolving iron dichloride, a ligand and an alkyl metal compound in a solvent in a dry single-neck glass bottle in an inert gas atmosphere, sealing a bottle mouth through an emulsion pipe, keeping the constant temperature in a water bath at the temperature of 40-50 DEG C for 10-30min, and cooling to obtain an iron complex catalyst. Compared with the prior art, the catalyst provided by the invention is a novel iron complex catalyst which can produce catalytic activity in an nitrogen-protected system at a certain pressure and the temperature of 20-120 DEG C so as to catalyze the ternary copolymerization of the norbornenes with the tetrafluoroethylene and the pentenes, and a product after soaking in methanol is very easy to wash and separate. The catalyst has the characteristics of high copolymer yield, low reaction temperature, low price, easiness in obtainment, high catalytic efficiency and the like.

The invention discloses a method for preparing high-resilience thermoplastic polyurethane foamed particles and a molded body thereof. Thermoplastic polyurethane particles are placed in an autoclave, injected high-pressure mixed fluid is one or two of CO2, N2, HFC and HCFC, one or two of chloroform, ethanol, methanol, acetone, anone, butanone, pyridine, N-methyl pyrrolidone, N,N-dimethylformamide and N,N-dimethyl acetamide serve as an organic cosolvent, and the high-pressure mixed fluid is enabled to be in a saturated state in the thermoplastic polyurethane particles and then is placed in hot air for foaming, thereby obtaining the thermoplastic polyurethane foamed particles, of which foamed pore structures are uniform and are closed-pore structures. The thermoplastic polyurethane foamed particle molded body, which is light in weight, high in resilience and controllable in shape size and has good mechanical properties, can be obtained through injecting the thermoplastic polyurethane foamed particles in a mold and adjusting mold pressing temperature and pressure so as to soften heated surfaces of the foamed particles.

The invention relates to a preparation method of florfenicol intermediate, in particular to a preparation method of D-threo-2-(dichloromethyl)-4, 5-dihydro-5-(p-(methylsulfonyl) phenyl)-4-oxazole methanol, which comprises the detailed steps as follows: 100 portions of D-p-methylsulfino phenyl ethyl serinate (I) are dissolved in 500 to 700 portions of methanol; then 24 to 27 portions of potassium borohydride are added; the reaction temperature is between 30 and 50 DEG C and the reaction time is between 4 and 8 hours; 80 to 150 portions of methanol are recycled and 230 to 300 portions of glycerol are added; then acid is used for neutralizing the reaction solution to adjust the pH of the solution to be between 7 and 10; and 42 to 45 portions of dochloroacetonitril are added to generate the D-threo-2-(dichloromethyl)-4, 5-dihydro-5-(p-(methylsulfonyl) phenyl)-4-oxazole methanol (II). The preparation method has the characteristics of few technique steps, simple operation and low cost.

The process of preparing high water solubility polyvinyl alcohol features that vinyl acetate monomer in 50-80 weight portions, methanol in 16-49 weight portions, vinyl monomer containing carboxyl group or amido group in 1-4 and initiator in 0.04-0.08 weight portion are reacted in a reactor equipped with thermometer, stirrer, reflux condensator and water bath at 60-65 deg.c for 3-6 hr; and the resultant is compounded with methanol into 30 % concentration solution and alcoholyzed with sodium hydroxide or potassium hydroxide to obtain high water solubility polyvinyl alcohol.

The invention relates to a method for recycling methylal in glyphosate wastewater. The method comprises the following steps of: 1) treating the chloromethane tail gas obtained by deacidifying the glyphosate through a dealcoholization kettle with three-stage condensation and multi-stage washing in a water scrubber, wherein the chloromethane gas enters into a compression system so as to be recycled, and the condensate enters into a dilute methyl alcohol storage tank; pumping the condensate in the dilute methyl alcohol storage tank into a preheating kettle with the temperature of 50-60 DEG C to preheat the dilute methyl alcohol for 10-15min, then, distilling the preheated dilute methyl alcohol in a distillation tower; distilling out the low-boiling point methylal from the top of the distillation tower, discharging after reflowing and condensing, and conveying the condensate into a collection tank. The method not only can effectively reduce the potential safety hazards caused by wastewater discharge, but also can effectively recycle the methylal, and can improve the recovery rate of the methylal to be more than 96%.

The invention discloses a rapid and high efficiency chlorogenic acid and galuteolin in honeysuckle flower extraction method and a HPLC quantitative analysis method, and which comprise the following steps: superhigh pressure extraction and quantitative analysis. Superhigh pressure extraction comprises the steps as follows: firstly crushing dried honeysuckle flower and filtering by a sieve with 60-80 meshes, adding water or ethanol, methanol and n butanol organic solvent into the honeysuckle flower powder according to 1:10-1:100 solid liquid ratio, mixing and sealing, immersing at normal temperature, placing the mixture into a high pressure container, leaching with pressure at 20-60 DEG C. for 1-5 min, relieving pressure, carrying out centrifugation of extract product and obtaining the honeysuckle flower extract. Quantitative analysis: after centrifugation, diluting 2ml of the obtained supernatant to 10 ml with distilled water in a volumetric flask, refrigerating for standby. The chlorogenic acid and galuteolin in honeysuckle flower are extracted by a superhigh pressure technology and are carried out by a content determination, and the invention has the characteristics of high recovery rate, short extraction time, small solvent amount, simple operation, accuracy, good repeatability, no pollution, safety, low energy consumption, etc.

The invention belongs to the technical field of waste head and complementary energy recovery in iron and steel Industry, and in particular relates to a method for preparing methanol by sensible heat of blast furnace slag. The method comprises the following steps: blast furnace slag enters into a sensible heat recovery device; reactants enter into a grain slag packed bed to be preheated, and enter into a graining reactor when the temperature reaches 600 DEG C; the reactants enter into the graining reactor for reaction at 850 DEG C and at one barometric pressure to generate methanol. High temperature residual heat resources of liquid blast furnace slag are efficiently, economically and environment-friendlily used in an energy-saving manner. Treated blast furnace slag can meet the demand of cement manufacturing, and methanol produced belongs to a product widely applied with high additional value. Ternary reforming reaction of methane can realize part of self-heat supply, so that the energy efficiency in the reaction process is greatly enhanced, the cost is lowered, and carbon deposited on the surface of the catalyst can be alleviated or even eliminated. Coke oven gas resource is adequately utilized, the energy resource is saved, carbon dioxide in flue gas is utilized, and emission of greenhouse gases is reduced, so that the method is energy-saving and environment-friendly.

The invention belongs to the field of optical thin film materials and particularly relates to a method for preparing a high-hardness antireflection film on the basis of hollow silicon dioxide. The method takes tetraethoxysilane as the raw material, polyacrylic acid as a templating agent, 2-isopropoxy ethyl alcohol and methyl alcohol as solvents together, and ammonium hydroxide as a catalyst to prepare a hollow SiO2 coating film sol through a template method, and a two-sided thin film is plated on a glass substrate through a dip-coating method. After being calcined at 550 DEG C, the antireflection film is obtained, the average light transmittance is more than 98% within the light transmittance wavelength range of 400-800 nm, and the hardness is more than 4H.

The present invention relates to a novel nickel catalyst. The present invention also relates to a process for the preparation of an improved nickel catalyst. The present invention also relates to a process for hydrogenation of m-dinitro benzene to m-phenylene diamine using the said improved catalyst. More particularly the present invention relates to a process involving hydrogenation of m-dinitrobenzene to m phenylene diamine in the presence of a supported bimetallic platinum catalyst, using methanol as a solvent. The catalyst system consisting of one metal selected from platinum group and other nickel supported on either carbon or alumina or silica or zeolite. The catalyst of the present invention is a bimetallic catalyst prepared by precipitation and impregnation technique at very specific preparation conditions.

The invention relates to a method for preparing a test solution for quality detection of a safe stagnation removing preparation. The method comprises the following steps of: (1), extracting solution preparation: weighting 0.5-10.0g of solid safe stagnation removing preparation or contents thereof, adding a universal solvent for extracting alkaloid, carrying out ultrasonic treatment or heating backflow, cooling down, and filtering to obtain a filter liquid as an extract liquid for later use; or weighting 4-80ml of liquid safe stagnation removing preparation, and filtering to obtain the filter liquid as the extract liquid for later use; and (2) extract liquid purification: taking out the extract liquid, drying through steaming, dissolving residues by adding 1-10ml of hydrochloric acid solution (1-5,000) to the residues, centrifuging a mixed solution, taking out supernatant to slowly pass through an octadecylsilane bonded silica gel column (50-500mg), eluting by water of 2-30ml, collecting an effluent liquid and an eluting liquid, drying by steaming, dissolving the residues by adding 1-10ml of methanol with the volume percent of 30-100% or alcohol with the volume percent of 50-95%, standing, and taking out supernatant which is the test solution for a leonurus indexity element stachydrine hydrochloride thin layer discriminating and/or content determining method in the safe stagnation removing preparation.

A method for regeneration of toxic adsorbent is disclosed. The adsorbent comprises 80% to 95% by weight of molecular sieve and the other is adhesive agent. Regeneration process includes: solving and cleaning the adsorbent bed by using mixed aromatic solvent with 5% to 30% by volume of polar compound at 20 to 180 degree s C. under 0.2-1.5MPa and drying. Aromatic hydrocarbon in said mixed aromatic solvent is selected from toluene, xylene, ethylbenzene, diethyl benzene or methyl ethylbenzene and polar compound is selected from water, methanol, ethanol or acetone.

The invention provides a preparation method of a corrosion inhibitor of methanol gasoline, and belongs to the technical field of metal corrosion protection. The preparation method comprises steps as follows: alpha-methylstyrene dimer, maleic anhydride, dicumyl peroxide and dimethylbenzene are added into a reactor, and then, the mixture is heated in an atmosphere of nitrogen for reacting; after the mixture is cooled to the room temperature, octadecanol, polyethylene glycol, p-toluenesulfonic acid, n-butyl alcohol and ethyl acetate are added, the mixture is heated for reacting and then cooled to the room temperature, and a mixture I is obtained; the mixture I is washed with a sulfuric acid aqueous solution, then washed with an NaOH aqueous solution and finally washed with an aqueous solution, and a mixture II is obtained; and benzotriazole, 2, 6-tert-butyl-4-methyl phenol, hexamethylene tetramine, ethanol, propargyl alcohol, trimellitate, a surface active agent and a combustion improver are added into the mixture II and uniformly stirred, and the corrosion inhibitor is obtained. The provided methanol gasoline has good solubility with various oils, the additive amount is small, and the corrosion-resistant effect is superior to that of a similar product.

The invention discloses a preparation method of amlodipine maleate. The preparation method is applied in the field of pharmaceutical synthesis and uses maleic acid and amlodipine free base as starting raw materials. The preparation method comprises the following steps: adding maleic acid in anhydrous methanol or mother liquor, heating to dissolve, filtering to obtain the methanol solution of maleic acid, and adding the solution in a reaction bottle of a finished product area; adding amlodipine free base in anhydrous methanol to dissolve, stirring to ensure that amlodipine free base is completely dissolved and is transparent, and cooling to obtain the methanol solution of amlodipine free base; slowly adding the methanol solution of amlodipine free base in the obtained methanol solution of maleic acid, keeping the temperature and stirring, cooling, and standing to precipitate crystals; and washing the obtained crystals with absolute alcohol, and drying to obtain the finished product. In the preparation method, the solvent used for forming amlodipine maleate is greatly improved, an anhydrous methanol reaction system is established, the crystal form of the finished product is greatly improved, vacuum filtration is easy, and the yield is increased; and the mother liquor obtained through crystallization and filtration is used as the solvent for dissolving the next batch of solid amlodipine, thus the use amount of anhydrous methanol can be reduced, the utilization rate of the solvent can be increased, the treatment cost of the solvent can be saved, the drying time can be shortened and the operation time can be greatly shortened.

The invention relates to the technical field of plant effective constituent extraction and discloses an aloin extraction method. The extraction method provided by the invention comprises the following steps: peeling aloe leaves and smashing; adding hydrochloric acid methanol extracting solution homogenate with volume concentration of 1 %; leaching at a low temperature away from light and adopting ultrasonic wave for dissolving; auxiliary extracting; centrifuging at a low temperature to obtain the extraction of the aloin. The extraction method has the advantages that the method is simple, convenient and quick, the aloin extracting efficiency is improved; as the process is carried out at the low temperature all the way, the maintenance of aloin stability is facilitated.

The invention relates to a preparation method of D-p-hydroxyphenylglycine methyl ester. The preparation method comprises the following steps: (1) esterifying: carrying out an esterification reaction on D-p-hydroxyphenylglycine and methanol to obtain D-p-hydroxyphenylglycine methyl ester sulfate, and distilling off methanol and water under reduced pressure, wherein the D-p-hydroxyphenylglycine is added one time, and the methanol is added in batches; and (2) crystallizing the D-p-hydroxyphenylglycine methyl ester. The preparation method can very easily control the reaction endpoint, so that theyield and the quality index of the finished product can be guaranteed to the maximum extent; the preparation method provided by the invention avoids the problems of safety and operation caused by hydrogen chloride gas or thionyl chloride; and in the step of D-p-hydroxyphenylglycine methyl ester crystallization, an alkali metal hydroxide is used for adjusting the pH value of the system without using ammonia water, so that the problem that ammonia ions are difficult to treat is avoided.

A carbonizing waste processing apparatus is operable to rotate and heat a radiant tube for carbonizing waste therein so as to generate granular char and vapors from the waste, transfer waste into an upstream end of the tube, temporarily impede movement of the waste through the tube at upstream and downstream locations therein so as to ensure that residence time of the waste in the tube is sufficient at the upstream location to carry out evaporation of moisture from the waste and at the downstream location to elevate the temperature of any solids in the waste for completion of carbonization of the waste, discharge the granular char and vapors from the tube, and flow the generated and discharged vapors through a succession of finned heat exchanger tubes so as to condense and separate the vapors into oil, water and methanol.

The invention discloses a preparation method of 2,4-dibromo-butyricacid methyl ester. The method comprises the following steps of: (1) adding a phosphorus-containing substance to gamma-butyrolactone in the presence of stirring, and then cooling to -15 to -5 DEG C; slowly dropping a bromating agent by controlling the dropping temperature to be 0-20 DEG C and stirring for 1-2 hours after dropping; (2) slowly dropping a bromating agent being the same as that in the step (1) by controlling the dropping temperature to be 60-120 DEG C, and stirring for 2-4 hours after dropping; (3) cooling to -15 to -5 DEG C, slowly dropping methanol by controlling the dropping temperature to be 0-5 DEG C and stirring for 1-2 hours after dropping; and (4) treating to obtain a finished 2,4-dibromo-butyricacid methyl ester product. The method has short synthetic route, and an intermediate product is not needed to be separated and purified; through controlling the bromination temperature, the position and the degree of the bromination are controlled; and the yield reaches higher than 92 percent, and the purity reaches higher than 98 percent.

The invention relates to a preparation method of a ternary terbium complex monomer and a copolymer luminescent material of the ternary terbium complex monomer and MMA. The method comprises the steps that firstly, the ternary terbium complex monomer is prepared, and recrystallization is conducted on an initiating agent AIBN (azodiisobutyronitrile) through methyl alcohol; then the ternary terbium complex monomer is dissolved by utilizing DMF (N,N-dimethylformamide) and DMSO (dimethyl sulfoxide) or a toluene solvent respectively, wherein the molar ratio of the ternary terbium complex monomer to the MMA is 1-10 to 100, and the initiating agent AIBN accounts for 0.5%-1% of the total mass of an initiating system; after reaction is conducted for 20-60 h under the conditions that inert gas argon exists, water and oxygen do not exist, and the temperature ranges from 50 DEG C to 85 DEG C, copolymer powder is obtained through methyl alcohol reprecipitation. The copolymer can be used for electronic terminals such as computers, televisions and mobile phones and mainly serves as the luminescent material of the panel display field. In addition, due to the fact that a pendant group -N-H- of the copolymer contains a reactive hydrogen atom, the copolymer can be used for ion recognition and fluorescent probes.