28 results about "Carbonate" patented technology

The invention discloses inorganic water-based metallic paint and a preparation method thereof. The paint is prepared from raw materials in percentage by weight as follows: deionized water, an anti-freezing agent (ethylene glycol), a film-forming aid (dodecanol carbonate), a bactericide (Rohm and Haas LXE), an organic silicon defoaming agent (Rohm and Haas 505), a leveling agent (Rohm and Haas RM2020), nano titanium dioxide or nano zinc dioxide, sericite powder, nano calcium carbonate powder, potassium trimethylsilanolate, silica sol NM-1020, fumed silica, pearl powder, an emulsion and an associative alkali swelling thickener. The inorganic water-based metallic paint is uniform to spray during construction, the pearl powder is arranged orderly, the color is uniform, the luster of the pearl powder is completely restored, the surface is fine and smooth, and the hand feeling is fine and smooth.

The invention relates to a method for extracting lithium and magnesium from salt lake brine. According to the method, high magnesium-lithium ratio salt lake brine and lithium-containing carbonate type salt lake brine are adopted as raw materials to successfully obtain a high quality lithium carbonate product and a basic magnesium carbonate product. The method has characteristics of easily available raw materials, low cost, simple process, high recovery rate, no pollution and the like, can be adopted for large scale production of high quality lithium carbonate and basic magnesium carbonate, and is applicable for lithium and magnesium resource development in most of salt lakes, particularly Tibet salt lakes.

Methods of enhancing the segregation roast through the use of microwave radiation and chloride ions are disclosed. The processes provide means of recovering metals trapped in ores and slags by reaction of these materials with carbon, chloride and water using microwave radiation as the primary energy source. The metals may be present in starting materials such as metallic sulfides, slags, metallic oxides such as laterites, magnetites, iron oxides, silicates and carbonates. The metals are reduced and can be recovered by separation from the gangue. Water, carbon and chloride can be recycled to the reaction to reduce costs.

The invention discloses a method for preparing a micro-system radiating device, which is characterized by comprising: a first step of preparing a carbon nanotube array on a growth substrate; and a second step of depositing a metal anchored zone on the free end face of the carbon nanotube array, wherein the metal anchored zone consists of a plurality of layers of metals; the surface of the metal anchored zone abutted on the free end face of the carbon nanotube array is provided with a metal soakage layer; and the other parts of the metal anchored zone are provided with highly-heatconducting metals so as to obtain the micro-system radiating device. In the method, the metal soakage layer reacts with nanotubes to form metallic carbonates, so that better transitional crystal structures can be formed between the metal soakage layer and the nanotubes; and compared with a wet interface between the metal soakage layer and the carbone nanotubes, the transitional crystal structures can reduce the scattering of hot carriers, such as phonons, electrons and the like, thereby further reducing thermal contact resistance between the carbon nanotubes and a heat source.

The present invention relates to the synthesis of rhodiola glycoside compound. Under the catalyst of boron trifluoride etherate, trifluoromethyl sulfonic acid, trialkylsilyl triflate, perchloric acid or other Lewis acid, 1-glycoimino ester and substituted phenyl ethanol as raw material react to produce polysubstituted rhodiola glycoside compound; and the polysubstituted rhodiola glycoside compound is reacted with hydroxide, carbonate or methoxide to produce rhodiola glycoside compound. The said process is simple, high in yield and suitable for industrial production.

The invention discloses a calcium citrate producing method includes following steps: (1) contacting a citric acid fermentation clear liquid with heavy calcium carbonate to obtain a crude calcium citrate crystal; (2) acidically hydrolyzing the crude calcium citrate crystal with hydrochloric acid to obtain a solution and filtering the solution; and (3) contacting a filtrate with one or more of a carbonate of alkali metals, a hydroxide of the alkali metals, an oxide of the alkali metals, ammonium carbonate and ammonium bicarbonate. The producing method can obtain the crude calcium citrate crystal precipitation directly through reaction between the simply-filtered impurity-containing crude citric acid fermentation clear liquid and the heavy calcium carbonate and then the high-purity calcium citrate, which is 99.9-99.99% in purity and can reach a standard in United States Pharmacopeia USP33-NF28 and American food additives FCC5, can be obtain just by performing one filtering process for removing impurities and performing a contact reaction between the obtained filtrate and one or more of the carbonate of alkali metals, the hydroxide of the alkali metals, the oxide of the alkali metals, the ammonium carbonate and the ammonium bicarbonate.

The invention relates to a method for preparing nesquehonite whiskers and nano flaky basic magnesium carbonate. The method is characterized in that sodium bicarbonate and magnesium chloride are used as raw materials, and nesquehonite whisker samples with high aspect ratio of 20-30 and narrow distribution range are obtained by controlling reaction conditions; filtrate obtained by filtering nesquehonite is subjected to further high-temperature reaction to obtain nano flaky basic magnesium carbonate with the content of 41-44%; after the reaction, evaporation, concentration and crystallization are performed on filtrate obtained by filtering the basic magnesium carbonate to allow the sodium chloride crystals to be separated, and the sodium chloride crystals are obtained through filtering. The method has the advantages the method is simple in preparation process, easy in process control, mild in condition and easy to achieve industrialization; the nesquehonite whiskers are high in purity, good in overall dispersity, high in aspect ratio and narrow in distribution range; total reaction yield is above 98.0%, and raw material utilization maximization is achieved; the side products sodium chloride can be recycled and refined.

The invention discloses coating starch, a coating starch preparation method and papermaking coating. The coating starch preparation method includes: providing cassava native starch slurry; adding alpha-amylase and glycerin into the cassava native starch slurry to obtain enzymatic starch; adding ammonium zirconium carbonate into the enzymatic starch to obtain the coating starch. By cassava native starch modification, characteristics of the coating starch containing the modified cassava native starch are suitable for coating, and the coating starch is especially suitable for application in a metering size press coating process.

The invention relates to a novel preparation method of a useful decisive compound of Aluminum Magnesium hydroxy Carbonate serving as a therapeutic agent of gastrointestinal diseases as shown in chemical formula 1.

The invention discloses a method for preparing lithium manganate by a wet-doping method. By the wet-doping method, manganese chloride solution, ammonium bicarbonate solution and lanthanum nitrate solution are reacted in aqueous solution. Lanthanum hydroxide and manganese carbonate are generated in a coprecipitation way. Manganic manganous oxide-doped crystals are obtained after high-temperature calcination, crushing and grading. Lithium carbonate and the manganic manganous oxide-doped crystals are mixed according to the molar ratio of lithium to manganese, and the molar ratio is 1.15:2. After being mixed effectively and uniformly, the above mixture is put into a kiln to be sintered at a high temperature. After cooling, crushing, grading, sieving and deironing of the sintered materials, spinel-shaped and lanthanum-doped lithium manganate is obtained. The method can combine materials and doping elements tightly. During the high-temperature calcination reaction, the doping elements can be inserted into crystal structures to be doped completely and fused with the doped crystals together. The doping of lanthanum element can raise the average oxidation state of manganese ions, inhibit Jahn-Teller effect effectively, reduce the capacity fading and raise the cycle performance.

The invention discloses a composite environment-friendly flame retardant for PC (Poly Carbonate) and PC flame retardant plastic. The composite environment-friendly flame retardant is composed of the following components in parts by weight: 10-20 parts of Phosphonic acid, P-[(trimethylsilyl)methyl]-, dimethyl ester, 30-50 parts of melamine cyanurate, 10-20 parts of tri-oxidation bi-antimony, and 40-60 parts of dimethyl methylphosphorate. The PC flame retardant plastic is composed of the following components in parts by weight: 100 parts of PC resin and 6-10 parts of composite environment-friendly flame retardants for the PC. The composite environment-friendly flame retardant for the PC does not contain halogen, has a good flame retardant function, and is mainly taken as engineering plastics to be widely applied to transparent materials, parts of electric appliances, medical equipment, machinery housing and the like.

The invention provides a high-fluidity high-toughness PC (Poly Carbonate)/ABS (Acrylonitrile Butadiene Styrene) composition. The high-fluidity high-toughness PC/ABS composition is prepared from the following raw materials in parts by weight: 30 to 80 parts of PC, 5 to 25 parts of a flow improving agent, 10 to 55 parts of ABS, and 5 to 15 parts of an impact resistant modifier. According to the high-fluidity high-toughness PC/ABS composition, through the addition of the flow improving agent, the fluidity and the glossiness of the material are remarkably improved, and meanwhile, good toughness and strength of the material are maintained; the requirements on the fluidity and the glossiness of the material of different costumers can be completely met.

The invention discloses a method for preparing and synthesizing magnesium carbonate from magnesium chloride and carbon dioxide, and belongs to the technical field of chemical synthesis. In the method, uses the magnesium chloride which is a byproduct after extracting potassium from salt lake and carbon dioxide discharged in industrial process are used as reactants to prepare magnesium carbonate; and simultaneously, hydrochloric acid generated in the reaction process is moved out of a water phase using an extraction agent. The solid magnesium carbonate generated in the reaction is subjected to the steps of separating, washing, drying and the like to obtain solid magnesium carbonate trihydrate with high purity. By adopting the method, the waste magnesium chloride in the form of water soluble salt is converted to the solid magnesium chloride with slight solubility, which is conductive to large-scale storage and prevents salt lake pollution caused by back-infiltration of magnesium salt, a lot of CO2 gas is sealed and stored at the same time when the magnesium salt is immobilized, which is conductive to the reduction of CO2 discharge amount, and the magnesium carbonate which is immobilized for sealing and storage in large scale can be taken as resource reservation and reused when the technology is mature.

The invention relates to synthesis of fluorescent hollow spheres, in particular to a preparation method of CaCO3:Eu<3+> fluorescent hollow microspheres. The preparation method of the CaCO3:Eu<3+> fluorescent hollow microspheres comprises steps as follows: a) a carbonate raw material, a calcium-containing raw material, a europium-containing raw material and a soft template agent are weighed according to the stoichiometric ratio, added to deionized water respectively and sufficiently stirred, and uniform solutions are formed; according to the stoichiometric ratio, Eu<3+> doped CaCO3 is taken as a target product with the general formula being Cal(1-x)EuxCO3, and the doping amount x of Eu<3+> ranges from 0.01 to 0.10; b) a carbonate solution is dropwise added to calcium and europium solutions mixed with the soft template agent during magnetic stirring, the mixed solution is aged and then subjected to suction filtration and washing, and precipitates are dried in a freeze drying box for 12-24 hours. The CaCO3:Eu<3+> fluorescent hollow microspheres are prepared with the soft template method, the template agent is not required to be removed additionally in the preparation process, and the preparation process is reduced. Besides, the prepared CaCO3:Eu<3+> fluorescent hollow microspheres are lower in price as compared with common oxide fluorescent hollow microspheres and also have double functions of drug/catalyst loading and fluorescent tracing. Therefore, the product performance is high, the procedure is simplified, the cost is low, and the application field is wide.

The invention discloses an antibacterial and anti-aging denture soft lining material. The material is prepared from a dandelion extract, vinyl silicone rubber, tetraethyl orthosilicate, hydroxy silicone oil, silicon dioxide, a crosslinking agent, an accelerator, an anti-aging agent, barium titanate, zinc oxide, propargyl glycerol monopalmitate, stearic acid, magnesium carbonate, casein, sodium acetate and an ethylene-octene copolymer. According to the denture soft lining material, rubber and plastic are blended, the fitting performance and the elasticity are good, the materials are subjected to banburying and vulcanization molding, demolding is conducted after the materials are cured, and the denture soft lining material is obtained; the denture soft lining material has high elasticity, the water absorptivity is smaller than that of a silicone rubber soft lining material, the cost is low, the solubility is also maintained at a relatively low level, and the biocompatibility of the denture soft lining material is good.

The invention relates to a preparation method of top-grade pure nickelous chloride, which comprises the following steps: (1) reaction between nickelous carbonate and hydrochloric acid: putting nickelous carbonate in a glass beaker, heating to 65 DEG C, slowly adding hydrochloric acid (the specific gravity is 1.18) while continuously stirring and controlling the reaction temperature at 75 DEG C, stopping adding the hydrochloric acid when the pH value is 5, standing for 20 minutes, and filtering to obtain a solution A; and (2) preparation of top-grade pure nickelous chloride by concentrating: concentrating the solution A obtained in the step (1) to 20 degrees Be while controlling the temperature at 240-260 DEG C, stopping concentrating, cooling, and carrying out suction filtration to precipitate a crystal, thereby obtaining the top-grade pure nickelous chloride. The preparation method has the advantages of simple processing steps, controllable operation steps, advanced technique and high production efficiency. The prepared product has the advantages of high purity and low impurity content, and satisfies the demands of high-end technology.

Synthetic resin fixing system based on cyclic carbonate resins, characterised in that as cyclic carbonate resin it comprises at least one having an average functionality of 1.5 or more than 1.5 cyclic carbonate groups per molecule, the production thereof and use thereof for fixing, especially, anchoring means in drilled holes.

The invention discloses a method for synthesizing a cyclooctatrieneindole derivative through manganese catalysis. The method takes cheap and commercial Mn(CO)5Br as a catalyst, and C-H bond activation, allene reaction and intramolecular 1,5-hydrogen migration cascaded reaction of a propargyl alcohol carbonate type compound and 3-alkenyl substituted-N-pyridylindole type compound are realized; undermoderate conditions, a cyclooctatrieneindole type framework can be constructed in a high-yield and high-selectivity manner. The method is simple to operate, low in catalyst dosage, moderate in reaction conditions and wide in substrate applicable range; the disadvantages that traditional synthesis of the compound needs to be carried out through a plurality of steps, a starting raw material is difficult to prepare, the substrate applicable range is limited and the like are overcome and the method has a very good development prospect.

A high-temperature-resistant wear-resistant compound resin material table surface is characterized by comprising the following raw materials in parts by weight: 20-25 parts of high-temperature-resistant unsaturated resin, 200-210 parts of inorganic raw materials added with a functional modifier, and 0.05-0.1 part of rare earth oxide, wherein the inorganic raw materials comprise quartz sand of which the particle diameter is less than 5 mm, 150-200-mesh diatomite and 350-mesh silica powder; the functional modifier is a mixture of mono-alkoxyl titanate coupling agent, polytetrafluoroethylene and tert-Butylperoxy 2-ethylhexyl carbonate; the additive amount of the functional modifier is 0.4-0.7% of the weight of the inorganic raw materials. The adopted high-temperature-resistant unsaturated resin is better improved in high temperature resistance as compared with the unsaturated resin in the prior art, the high-wear-resistant functional modifier and the rare earth oxide are adopted to conduct wear-resistant and high-temperature-resistant modification on the compound resin material table surface, the high temperature resistance of the material is improved, and the product has better wear resistance.

The invention relates to powder coating. The power coating is characterized by being prepared from, by weight, 60-80 parts of magnesium carbonate, 4-5 parts of mica powder, 2-5 parts of cellulose, 3-5 parts of fluorescent powder, 4-5 parts of calcium hydroxide, 5-10 parts of bentonite, 2-10 parts of rubber powder, 60-80 parts of polyester resin, 20-25 parts of a curing agent, 35-40 parts of filler, 8-12 parts of a flatting agent, 4-6 parts of benzoin and 2-4 parts of a brightener. The powder coating has advantages of high hardness, scrubbing resistance, freeness of shedding, low cost and the like, and wall surfaces coated with the powder coating are bright and smooth as porcelain. Powder coatings formed by high-temperature baking and curing of the powder coating are remarkable in whitening resistance, and base material protection performance and appearance effects of the powder coatings are maintained.

The invention provides a secondary brine carbonate removal device. The device includes a filtration brine acidification tank. The filtration brine acidification tank is a sealed tank. The filtration brine acidification tank is provided with a hydrochloric acid inlet, a filtration brine inlet, a nitrogen inlet and a gas outlet. The hydrochloric acid inlet is used for inputting hydrochloric acid. The filtration brine inlet is used for inputting filtration brine output from a primary brine refining process. The nitrogen inlet is arranged in the bottom of the filtration brine acidification tank and is used for continuous input of nitrogen to maintain positive pressure at the upper part of the inside of the filtration brine acidification tank. The gas outlet is arranged in the top end of the filtration brine acidification tank and is used for discharging gas in the filtration brine acidification tank. Since the nitrogen is continuously input into the filtration brine acidification tank to maintain the positive pressure at the upper part of the inside of the filtration brine acidification tank, the nitrogen can timely discharge carbon dioxide carbon dioxide gas generated by adding hydrochloric acid in the brine from the gas outlet, and outside air is prevented from entering the filtration brine acidification tank to avoid secondary pollution of the filtration brine.