36 results about "Ethyl acetate" patented technology

An electrolyte for a rechargeable lithium battery is provided. The electrolyte includes a non-aqueous organic solvent and a lithium salt. The non aqueous organic solvent includes cyclic carbonate such as ethylene carbonate and propylene carbonate, chain carbonate such as dimethyl carbonate, diethyl carbonate, methyl ethyl carbonate and methyl propyl carbonate, and alkyl acetate such as n-methyl acetate, n-ethyl acetate and n-propyl acetate. The electrolyte can be used in a rechargeable lithium battery to provide good low temperature characteristics and safety.

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 relates to a method for preparing a chloroprene rubber adhesive agent. The current products contain a large amount of methylbenzene and are poisonous. The invention comprises the following steps: firstly adding the chloroprene rubber and chlorinated polyethylene into a mixed solution (the compositions are 120# solvent oil, acetic ether, butanone, acetone and methyl carbonate) and mixing; after being entirely dissolved, filling nitrogen into the reactor; then adding methyl methacrylate and vinyl acetate and heating up to 80-100 DEG C; adding benzoyl peroxide to initiate a polymerization reaction; after 2-3 hours of the polymerization reaction, adding acroleic acid and adding additional benzoyl peroxide to continue reacting for 1-2 hours; after that, stopping the filling of the nitrogen and cooling to 30-50 DEG C; then adding 2,6-ditertiary butyl-p-cresol, mixing and discharging to obtain the chloroprene rubber adhesive agent. Therefore, the chloroprene rubber adhesive agent prepared by the method of the invention is environmental-friendly and has higher bonding strength to EVA soles. The method has the advantages of simple process and can realize large-scale production.

The invention discloses essence of pickled Chinese cabbage and a preparation method and an application thereof. The method comprises the following steps: first, adding 60wt% of edible vegetable oil or glycerol triacetate as a solvent, heating to 60 DEG C, adding 4-hydroxyl-2, 5-dimethyl-3(2H) furanone, acetyl pyrazine, stirring till the components are completely dissolved, and cooling to below 30 DEG C; then, sequentially adding ethyl acetate, ethyl hexanoate, ethyl lactate, butyl caproate, 2-methyl butyric acid hexylester, phenethyl acetate, trans-2-heptenal, phenethyl alcohol, p-ethyl phenol, dimethyl disulfide, acetic acid, propionic acid, butyric acid, 2-methyl butyric acid, garlic oil or galic essential oil, fennel oil or fennel oil resin, ginger oil or ginger essential oil or distilled ginger oil and a pepper extract or pepper essential oil or pepper oil resin; and adding 40wt% of residual edible vegetable oil or glycerol triacetate, uniformly stirring and filling to obtain the essence. The essence of of pickled Chinese cabbage produced by the invention is vivid in frangrance compared with that of common fermented flavor essence, stable in quality, good in temperature resistance and unique in flavor.

The invention relates to a polyvinyl alcohol water-based architectural paint which is prepared from the following raw materials in parts by weight: 100 parts of polyvinyl alcohol, 10-20 parts of benzaldehyde, 5-15 parts of lithopone, 15-25 parts of hypnone, 1-10 parts of zinc oxide, 30-40 parts of paraffin, 50-60 parts of deionized water, 20-30 parts of benzoic acid, 15-25 parts of pigment, 30-40 parts of nitrocellulose, 25-35 parts of sodium hexametaphosphate, 35-45 parts of ethanol, 5-10 parts of plasticizer, 25-35 parts of ethyl acetate, 15-25 parts of talcum powder and 20-30 parts of triethanolamine. The product can not cake after being stored for 6-10 months, and the solid content is 35-45%. The surface drying time is 40-50 minutes, and the solid drying time is 20-22 hours. The paint does not have any abnormity after being immersed in saturated calcium carbonate for 10-20 days. The wiping resistance of the coated film is 2600-2800 times; and the paint can be widely produced and continuously substitute the existing materials.

The invention relates to the field of medicines, in particular to traditional Chinese medicine composition. The traditional Chinese medicine composition is prepared from the following raw materials: herba hedyotis diffusae and herba scutellariae barbatae in a weight ratio of 1:1 through steps as follows: the herba hedyotis diffusae and the herba scutellariae barbatae are ground, decocted with water for 3-5 times, extract liquids are mixed and concentrated, and an extract is obtained and degreased with petroleum ether and extracted with ethyl acetate for 1-6 times. The pharmaceutical composition can resist breast cancer, osteoporosis and inflammation, and inhibit activity of tumor-associated macrophages.

The invention relates to a synthetic method for bifenazate. The method comprises the following specific synthetic sections: step 1, performing nitration: mixing a 4-hydroxybiphenyl solution and a toluene solution under stirring for a reaction, and adding a HNO3 solution dropwise for a reaction to obtain a nitration reaction solution; step 2, performing methylation: mixing the nitration reaction solution and anhydrous sodium carbonate powder for a reaction, and adding a dimethyl carbonate solution dropwise for a reaction to obtain a methylation reaction solution; step 3, performing hydrogenation: throwing the methylation reaction solution, hydrogen gas, and Raney nickel into a reaction kettle for a reaction to obtain a hydrogenation reaction liquid; step 4, performing hydrazination: performing a primary hydrazination reaction, performing a secondary hydrazination reaction, performing filter pressing, performing a tertiary hydrazination reaction, and performing secondary filter pressingto obtain a condensation reaction liquid; step 5, performing condensation: mixing a third hydrazine compound, an ethyl acetate solution and an isopropyl chloroformate solution for a reaction to obtaina bifenazate mixed liquid; and step 6, performing purification: performing desolvation, performing crystallization, performing centrifugation, performing washing, performing secondary centrifugation,and performing drying to obtain the finished bifenazate. The method provided by the invention has the effect of improving purity of the bifenazate product.

The invention relates to a preparation method of a cordyceps sinensis mycelium extract. The preparation method is characterized by comprising the following steps of: putting the cordyceps sinensis mycelium in an oven, and performing vacuum drying at 55-60 DEG C for 8-10 hours, wherein the vacuum degree is 0.01-0.05MPa; after the drying, crushing and screening by a 20-mesh sieve to obtain coarse powder; adding the coarse powder into a multifunctional extraction tank, and adding a solvent; heating to 60-80 DEG C, and refluxing for 1.5-2 hours; cooling to normal temperature, and filtering; recovering the solvent from the filtrate; and drying in the oven at 80 DEG C to obtain a dry paste which is the cordyceps sinensis mycelium extract. The solvent comprises the following components in parts by mass: ethyl alcohol, ethyl acetate, petroleum ether and tributylamine at a mass ratio of (60-85):(5-25):(5-25):(5-10). By adopting the method provided by the invention, the prepared cordyceps sinensis mycelium extract can be added into a Chinese medicine preparation according to the prescription percentage to prepare a preparation; and the pharmacological components of the cordyceps sinensis mycelium are uniformly dispersed and quickly dissolved out in the body to last for long time and promote sufficient absorption by the human body.

The invention discloses a fuel oil additive mixture, which is composed of the following formula components by mass percentage: 20-50 parts of triethylamine, 30-50 parts of ethylene glycol, 30-50 parts of ethylenediamine, 15-50 parts of acetone, 20-40 parts of ethyl acetate, 30-40 parts of isooctyl nitrate, 20-40 parts of nano-iron oxide, 30-50 parts of glyceryl monooleate, 10-30 parts of palmitic acid, 5-10 parts of carbon tetrachloride, and 10-30 parts of propylene dichloride. The fuel oil additive mixture provided by the invention can clear carbon deposit, clean the fuel oil system, enhance the power performance, improve atomization, save fuel oil, prevent corrosion, prevent rust and lubricate, protect the engine, reduce noise, reduce wear, prolong the engine life, eliminate black smoke, and lower emission.

The invention belongs to the natural drug chemical field, and is characterized in that: grinding Xizang rhizoma picrorhizae medicinal materials, adding 75%-95% of ethanol with an amount of 16-20 times for refluxing and extracting for 2-3 times, recycling ethanol from an extracting liquid with lowered pressure, extracting a concentrated liquid with ethyl acetate, taking an organic layer, and recycling ethyl acetate for concentration. The volume is concentrated until sticky dipped using a glass rod, then it is placed at the condition of -10 DEG C to -5 DEG C for 24 hours, crystal is precipitated, and filtered, the crystal solid is refluxed and dissolved by adding 95% of ethanol, then standing for crystal precipitation, and then filtering to obtain the cucurbitacine B. According to the method provided by the invention, the process prepareing the cucurbitacine B is simple in process, low in cost, high in yield and productive rate, and suitable for industrial large-scale preparation.

The invention discloses a method of extracting active ingredients of Dendropanax dentiger leaves with ultrasonic waves. The method includes using ethanol water as the solvent, conducting separate excitation type ultrasonic extraction and interval sounding extraction in an ultrasonic extraction kettel, and then extracting through petroleum ether, ethyl acetate and n-butyl alcohol in sequence to obtain yellow active ingredients of Dendropanax dentiger leaves. The main composition of the active ingredients of Dendropanax dentiger leaves is saponin, and about 25g active ingredients can be extracted from each kilogram of Dendropanax dentiger leaf powder, and the content of saponin in each gram of active ingredients of Dendropanax dentiger leaves is about 741.5mg. The extraction method is simple and has high extraction efficiency, and the extracted active ingredients can improve the immunity of rabbits.

The invention discloses a flame-retardant finish paint for furniture. The flame-retardant finish paint comprises a main agent, a curing agent and a diluent, wherein the main agent comprises the following raw material components in parts by weight: 30-38 parts of amino resin, 24-32 parts of acrylic resin, 12-18 parts of vinyl acetate, 0.2-0.6 part of a defoaming agent, 2-5 parts of a flame retardant, 0.4-0.9 part of a dispersant and 0.2-0.4 part of a thixotropic agent; the curing agent comprises the following raw material components in parts by weight: 25-32 parts of a toluene diisocyanate trimer, 14-20 parts of imidodicarbonic acid diamide, and 8-15 parts of butyl acetate; the diluent comprises the following raw material components in parts by weight: 20-27 parts of ethanol, 5-9 parts of paraffin oil, and 32-40 parts of ethyl acetate; and a mass ratio of the main agent, the curing agent and the diluent is 1:(0.25-0.4):(0.55-0.65). The invention provides the flame-retardant finish paintfor furniture which has the following beneficial effects: the finish paint is applied to timber furniture, has very excellent flame-retardant performance, does not contain toxic organic volatiles, belongs to an environment-friendly coating, and is high in impact resistance and excellent in overall performance.

The invention relates to the new applications of an annonaceous acetogenins compound V, in particular to the applications of the compound V for preparing an anti-cancer drug. Annonaceous acetogenins is extracted from the scratch stock of a custard apple seed with organic solvent, including ethanol, petroleum ether, ethyl acetate and chloroform, etc.; the annonaceous acetogenins is processed by silicagel column chromatography and eluted with chloroform-methanol, petroleum ether-ethyl acetate and ethyl-acetate-methanol; and the annonaceous acetogenins compound V is made. The content of the annonaceous acetogenins compound V is 50 to 90 percent of mass fraction. An endozoic anti-cancer pharmacological test shows that the annonaceous acetogenins compound V has a significant effect on inhibiting the growth of the cancer cells of a lung, a breast and a liver and the anti-cancer activity of the annonaceous acetogenins compound V is higher than chemo-treatment 5-S-Fu, so the annonaceous acetogenins compound V can be used for preparing the anti-cancer drug.

The invention discloses lubricating oil for an oil field operation drill pipe. The lubricating oil is prepared from the following ingredients in parts by weight: 30 to 40 parts of dialkyl sodium sulfonate, 20 to 40 parts of perchloro-ethylene resin, 8 to 16 parts of ethyl acetate, 6 to 14 parts of hydroquinone, 6 to 12 parts of benzoperoxide, 30 to 60 parts of tetraethoxysilane, 10 to 12 parts ofpolyisobutene, 4 to 8 parts of ammonium chloride, 8 to 16 parts of sodium silicate, 4 to 14 parts of sodium benzoate, 10 to 20 parts of magnesium chloride and 4 to 8 parts of dodecyl sodium sulfate. The lubricating oil for the oil field operation drill pipe provided by the invention has the advantages that the raw material resources are wide; the price is low; glue achieves an environment-friendlyeffect; pollutants are few; a good lubricating effect is achieved; the drying is fast; the quality is stable.

The invention discloses an automobile cushion care agent. The automobile cushion care agent comprises following substances including, by mass, 30-50 parts of ethyl acetate, 5-10 parts of sodium chlorite, 3-8 parts of methylphenol, 10-15 parts of sorbic acid, 5-8 parts of lecithin, 3-5 parts of tertiary butyl methylphenol, 1-3 parts of salicylanilide, 2-5 parts of a surface active agent, 3-6 parts of a leather fatting agent and 1-3 parts of a leather brightening agent. The automobile cushion care agent is low in manufacturing cost and has the functions of cleaning, dirt removing and leather brightening and moistening, meanwhile, mould prevention and bacterium restraining can be conducted, the weather resistance of the leather is improved, and the phenomena of ageing, cracking and the like of the leather cushion are prevented.

A method for developing and extracting biological trace evidence comprises the following steps: (1) using a biological fluorescent development reagent to process a porous carrier so as to develop biological trace evidence on the porous carrier, wherein a raw material formulation of the biological fluorescent development reagent is, in percent by weight: 0.01%-0.5% of indanedione, 4%-10% of ethyl acetate, 0.5%-1.5% of glycerol, 5%-15.5% of pure alcohol, and 73.5%-90% of petroleum ether; and (2) extracting the biological trace evidence to obtain DNA information of the biological trace evidence. For crime investigators who need to extract DNA evidence, the method enables targeted extraction of physical evidence, thereby greatly reducing workload, and furthermore, the method can also be used to develop and extract obscure or trace evidence, such as a fingerprint on a garment, thereby greatly improving investigation efficiency.

The invention discloses a wood plant type mildew-proof agent and a preparation method. The wood plant type antifungal agent is prepared from the compositions in parts by weight: 5-12 parts of pyrethrum cinerariifolium, 4-10 parts of herba artemisiae apiaceae, 2-7 parts of rhizoma atractylodis, 1-6 parts of fructus cnidii, 4-9 parts of flos caryophylli, 2-7 parts of radix angelicae sinensis, 5-10 parts of radix sophorae flavescentis, 4-10 parts of cyclohexanol and 2-6 parts of ethyl acetate. The wood plant type mildew-proof agent and the preparation method have the characteristics that the mildew-proof property is good, the wood type mildew-proof agent has no toxicity, manufacturing is simple, and the cost is low.

The invention discloses a method for extracting vavasu (one kind of isoflavone compounds) from Ceiba pentandra (L.) Gaertner. The method comprises the steps of taking tree barks of the Ceiba pentandra (L.) Gaertner as a raw material, crushing and then extracting the raw material in a fluid dynamic continuous countercurrent extraction device, putting the extraction solutions together to recycle ethanol, conducting purification by means of membrane separation, adsorbing by polyamide resin column on a permeation solution, eluting water and alcoholic solution, collection target components, concentrating the solution, extracting the concentrated solution by ethyl acetate, concentrating the extraction solution to a small size, standing by to crystalize the solution, recrystallizing crystals by using acetonitrile-dichloromethane, and then freezing and drying the crystals to obtain the vavasu. The process is simple in process, high in extraction efficiency and low in cost, thereby being quite beneficial to industrialized production.

The invention provides a preparation method of aryl borate, which mainly comprises the following steps: in the presence of a water-soluble free radical initiator, reacting by using water as a solventand aryl sulfonyl chloride and bis(pinacolato)borate as raw materials, extracting the reaction product by using an organic solvent after the reaction is completed, collecting the extract an organic phase, and carrying out reduced pressure distillation to obtain the product aryl borate. By using the water-soluble free radical initiator, water can be used as a reaction solvent; compared with the prior art that acetonitrile, halogenated alkane, ethyl acetate and other organic solvents are used, water is used as a solvent, environmental pollution is reduced, toxicity is reduced, and raw material sources are more economical; in addition, the method has the advantages of mild reaction, simple post-treatment, high yield, high purity and the like, and is very suitable for industrial production.

The present invention discloses a characteristic map detection method of powerful gastrodia elata-eucommia ulmoides capsules. According to the characteristic map detection method, a test sample solution is prepared, wherein the test sample solution contains the site A of an alkaline condition ethyl acetate extraction sample and the site B of an acidic condition ethyl acetate extraction sample; a reference substance solution is prepared; the test sample solution and the reference substance solution are respectively subjected to chromatographic condition determination; the characteristic maps respectively generated from the data of the sites A and B of the test sample solution are subjected to a precision test, a stability test and a repeatability test; the characteristic map of powerful gastrodia elata-eucommia ulmoides capsules is established, and is subjected to similarity evaluation; and finally the attribution of the chromatographic peak is determined so as to identify the components of the powerful gastrodia elata-eucommia ulmoides capsules. The method of the present invention is accurate and reliable, and can be used for the identification and the quality control of the powerful gastrodia elata-eucommia ulmoides capsules.

The invention provides a preparation method of rocuronium bromide. The preparation method comprises the following steps: step 1, reacting a raw material compound I with acetyl chloride to obtain a compound II; 2, dropwise adding a hydrochloric acid solution into the compound II obtained in the step 1 to carry out a hydrolysis reaction, performing standing for layering, removing part of an organiclayer, adjusting the pH value of the residual reaction solution to 7-9 by using a sodium carbonate aqueous solution, separating out an organic phase, and treating to obtain a compound III; 3, adding dichloromethane, anhydrous magnesium sulfate and alkaline aluminum oxide into the compound III and allyl bromide, carrying out a quaternization reaction under the nitrogen flow, filtering under the protection of nitrogen after the reaction is completed, concentrating a filtrate to obtain a concentrate, pulping the concentrate by using a dichloromethane-methyl tert-butyl ether-ethyl acetate system,separating out solids, and carrying out freeze drying to obtain a rocuronium bromide pure product. The purity of the prepared bulk drug product is greater than or equal to 99.8% (according to a USP40correction result), the maximum impurity content is less than or equal to 0.1% (according to the USP40 correction result), and the solvent residue sum is less than or equal to 0.5%.