89results about How to "The preparation process route is simple" patented technology

The invention provides a method for preparing activated carbon by utilizing direct coal liquefaction residue as a raw material. The method includes the steps as follows: (1) adding smashed direct coal liquefaction residue together with KNO3, KOH and absolute alcohol into water, stirring to be uniform under room temperature, and later drying the obtained mixture to obtain a dry material; (2) placing the prepared dry material in a carbonization furnace, conducting preoxidation in the atmosphere of air, conducting carbonization-activation in the atmosphere of inertia gas, and then obtaining coarse activated carbon; and (3) acid-washing and deashing the prepared coarse activated carbon to obtain finished activated carbon. The method is simple in preparation process route, uses conventional equipment and has universality to the raw material. The obtained activated carbon has not only characteristics of high specific surface area, developed micropores and low ash content, but also controllable output, higher productivity, suitability for production in batches, and better technological and economic benefits.

The invention discloses a fuel battery used oxygen reduction catalyst and the preparation method thereof, and relates to a loaded catalyst which is composed of a transition metal chelate and a carbon black carrier, wherein, the transition metal chelate is prepared through the reaction of transition metal salt and diethylene triamine. MN3 structure is included in the molecule of the transition metal chelate (M is transition metal and N is nitrogen atom), and an active site is provided for catalyzing the oxygen reduction reaction. The catalyst takes the diethylene triamine with low cost as the raw material; overcomes the problems of the traditional oxygen reduction catalyst of the macrocyclic compound, such as metalloporphyrin and metal phthalocyanine, that the cost of the raw materials is high, and the traditional oxygen reduction catalyst is not suitable for the large scale production industrial production; and has the advantages of simple preparation technology, mild condition, secure process, low cost, and so on. The catalytic performance of the catalyst is equivalent to the oxygen reduction of the metalloporphyrin, the catalytic has good anti carbinol oxygenic property, and can be applied to the oxygen reduction reaction of the cathode of the battery.

The invention provides a tungsten carbide based cemented carbide powder metallurgical material and method for preparation, wherein the the constituents (by weight percentage) include WC 86-95%, Co 4-8%, Al 1-3%, TiC 0-2%, and VC 0-2%. The preparing process consists of pre-grinding, mixing, ball-grinding, and finally consolidating through electric current flash sintering method.

The invention discloses a preparation method of a monolayer SiO2 antireflection film. The preparation method comprises steps as follows: (1) pretreatment of a glass substrate; (2) preparation of SiO2 sol; (3) sol coating and molding; (4) film curing; and (5) cooling, checking and packaging. The monolayer SiO2 antireflection film has excellent anti-reflection performance, very excellent thixotropy, good self-cleaning performance and excellent chemical stability, and the preparation method is simple.

The invention relates to a solvothermal preparation method of a 3D flower-shaped lithium iron phosphate positive electrode material assembled by two dimensional nanosheets, and belongs to the preparation method of the positive electrode material lithium iron phosphate for a power lithium ion battery. The method comprises the steps: firstly, adding an iron source and a phosphorus source to a reactor, carrying out magnetic heating and stirring to obtain a deep green suspension, then adding a lithium source and a complexing agent, continuously stirring for several hours, then transferring the reactant to a hydrothermal kettle, at the same time, adding a solvent having a certain volume proportion and having surfactant properties, carrying out a heat preservation reaction, after the reaction isfinished, cooling to room temperature, carrying out centrifugal washing, and carrying out vacuum drying. Two mixed solvents are adopted in the preparation, and one is the solvent having the surfactant properties; according to the 3D flower-shaped lithium iron phosphate assembled by the nanosheets and having a porous structure, on one hand, complete wetting of an electrolyte and a positive electrode material is facilitated, on the other hand, the lithium ion migration diffusion path is shortened, the ion migration rate under battery multiplying power discharge is improved, the experiment process is simple, and the positive electrode material LiFePO4 with good performance can be prepared.

The invention relates to a preparation technology of a telmisartan active pharmaceutical ingredient, which comprises the technological routes: taking 3-methyl-4-nitryl-benzoic acid as an initial raw material; preparing 4-amino-3-methyl benzoic acid methyl ester through esterification and reduction; preparing 4-methyl-2-propyl-benzimidazole-6-carboxylic acid through acylation, nitration of fuming nitric acid, reduction, cyclization and hydrolysis; producing 4-methyl-2-propyl-6-(1-benzimidazole-methylbenzimidazole-2-yl)-benzimidazo through the condensation with N-methy-o-phenylenediamine; and condensing with 4'-brooethyl biphenyl-2-carboxylic methyl ester in the presence of potassium tert-butoxide and preparing a telmisartan crude product through the hydrolysis of a sodium hydroxide solution-methanol system. The technological routes are simple and mature. The total molar yield can finally reach 23.2% through improving the traditional technological routes; and reaction operation is more easier, the process is simpler, serious three-waste pollution is not generated and the preparation technology is convenient for industrial production.

The invention discloses a preparation method of a multi-layer SiO2 inorganic anti-reflection film. The preparation method comprises steps as follows: (1) pretreatment of a glass substrate; (2) preparation of SiO2 sol; (3) sol coating and molding; (4) film solidification; (5) cooling, detection and packaging. The multi-layer SiO2 inorganic anti-reflection film has excellent anti-reflection performance, very excellent thixotropy and excellent chemical stability and is simple in preparation process.

The invention discloses a method for preparing impregnation pitch using direct coal liquefaction residue, impregnation pitch and application thereof. The method comprises the following steps: (S1) adding an extraction solvent into the direct coal liquefaction residue, and sequentially performing hot-melting extraction, solid-liquid separation, reduced-pressure distillation and solvent recycling treatment to obtain coal liquefaction pitch; and (S2) adding heavy oil into the coal liquefaction pitch, blowing air into a reaction kettle, heating and stirring under normal pressure, and performing a heat polymerization reaction to obtain the impregnation pitch and the recycled light oil byproduct, wherein the heavy oil is anthracene oil, vacuum residue and/or catalytic cracking slurry oil with initial boiling point over 260 DEG C; and the addition volume of the heavy oil is 20-50wt% of the coal liquefaction pitch. The method disclosed by the invention has the advantages of simple technology, mild conditions, conventional equipment and easiness in enlarged production.

The invention discloses a preparation method of L-carnitine nitrate, comprising the following steps of: dripping nitric acid into L-carnitine while stirring under the temperature of 10 to 25 DEG C, wherein the mol ratio of the L-carnitine to the nitric acid is 1: 1-1.1; gradually clarifying the solution at the reaction temperature of 40 to 70 DEG C; regulating the pH value of the solution to be 1to 2 by using the nitric acid; continuously stirring the clarified solution, preserving the temperature for 15 to 30min and then compressing and dehydrating, stirring and air-drying at 50 to 70 DEG C, and drying at 75 to 80 DEG C to obtain an L-carnitine nitrate finished product. In the invention, the L-carnitine and the nitric acid are reacted under the ordinary pressure, and therefore, the reaction conditions are mild. In the preparation method, the food-grade L-arginine and the high-purity nitric acid are adopted as raw materials, therefore, the produced L-carnitine nitrate has good quality and high purity up to more than 99 percent without crystallization; not only the quality is ensured, but also the working procedures are saved. The production efficiency is improved and the yield coefficient is high and is up to more than 98 percent. The preparation method has reasonable and simple process and can be suitable for industrial large production.

The invention discloses a preparation method and intermediate of an isoquinoline compound. The isoquinoline compound is roxadustat, the intermediate of the roxadustat is a compound formula 2, and twonovel preparation methods of a roxadustat key intermediate 9 are developed by taking the compound formula 2 as a raw material. According to the first method, a compound 2 reacts with hydroxylamine hydrochloride to obtain an intermediate compound formula 3, and then the intermediate compound formula 3 reacts with a phosphine reagent compound formula 4 to obtain the roxadustat key intermediate compound formula 9. According to the second method, acyl chloride is prepared from the compound formula 2, then the acyl chloride and an aminomalonate ester derivative 7 are subjected to condensation and decarboxylation reaction, then a compound formula 8 is obtained, and finally, the key intermediate compound formula 9 is obtained. The two methods are high in yield, using of precious metal for catalysis is avoided, the route efficiency is greatly improved, the technological cost is lowered, generation of by products is reduced, and the purity of final finished products is improved advantageously;and a route is easy to operate, the total yield is high, the purity of obtained products is also high, the route is suitable for amplifying production, and the route is shows as the formula (please see the specifications for the formula).

The invention belongs to the field of preparation of inorganic nonmetallic materials and particularly relates to a spherical lanthanum zirconate nano material preparation method. The method includes: completely dissolving lanthanum acetylacetonate and zirconium acetylacetonate into methanol solution, performing solvothermal reaction, filtering, washing, drying, calcining and cooling to obtain a spherical lanthanum zirconate nano material. The spherical lanthanum zirconate nano material preparation method is simple, convenient and feasible in process, high product purity and low preparation cost are realized, product size is 150-200nm, high uniformity and dispersity of products are achieved, and technical simplicity in production, low sintering temperature and easiness in application to practical large-scale production are realized. The spherical lanthanum zirconate nano material prepared according to the method has a promising application prospect in the field of high-temperature thermal insulation.

The invention belongs to the field of preparation of inorganic non-metallic materials and particularly relates to a preparation method of a tin dioxide/copper oxide composite nano material with a spherical hierarchical structure. The preparation method comprises the following steps: fully dissolving copper acetylacetonate and tin tetrachloride in a methanol solution, performing solvothermal reaction, filtering, washing, drying, calcining and cooling to obtain the tin dioxide/copper oxide composite nano material with the spherical hierarchical structure. The tin dioxide/copper oxide composite nano material prepared by the preparation method provided by the invention is high in purity and low in preparation cost, the size of a whole big ball is 3-6 mm, the size of a nano particle is 20-30 nm, the product uniformity and the dispersibility are good, and the large-scale production is easy. The tin dioxide/copper oxide composite nano material with the spherical hierarchical structure, prepared by the preparation method provided by the invention, has higher visible light photocatalytic activity and wide application prospect in the fields of dye wastewater and indoor harmful gas degradation, photocatalytic disinfection and the like.

The invention provides a lithium ion battery anode material. The lithium ion battery anode material comprises the compound with the atomic ratio shown as the general formula (I), and carbon, LiMn(1-x)MxPO4.yLiTi2(PO4)3 (I), wherein M is one or more of titanium, cobalt, ferrum, magnesium, aluminium, chromium and niobium, x is not less than 0 and not more than 0.2, and y is more than 0 and not more than 0.2. The invention provides a preparation method of lithium ion battery anode material, comprising the following steps of: mixing the lithium-containing compound, the manganese-containing compound, the M-containing compound, the titanium-containing compound, the phosphorus-containing compound and the carbon-containing compound, and executing ball milling on the mixture to obtain the slurry, wherein M is one or more of titanium, cobalt, ferrum, magnesium, aluminium, chromium and niobium; and burning the slurry to obtain the lithium ion battery anode material. The invention further provides a lithium ion battery, wherein the anode of the lithium ion battery is prepared from the anode material in the above technical scheme or the anode material prepared by the preparation method in the above technical scheme.

The invention discloses a preparation method of feed tannalbin and tannalbin prepared by the method. The preparation method comprises the following steps: adding water into Chinese gallnut processing screen underflow, performing mixing, and sequentially performing crushing treatment, performing ultrasonic treatment and performing stirring treatment. The tannalbin protein prepared by the method disclosed by the invention can obviously delay diarrhea attack time of mice and reduce the amount of wet excrement of the mice, and has an antidiarrheal effect. Besides, the tannalbin shields the astringent taste of tannin serving as a feed additive, the palatability of a feed is improved, the problem of waste treatment in Chinese gallnut processing factories is solved, environmental protection is facilitated, the utilization value of Chinese gallnut processing screen underflow is improved, the environmental protection burden of Chinese gallnut processing enterprises is reduced, and the method is simple, convenient and feasible. The method disclosed by the invention is green, clean, simple and easy to operate, simple in process route, easy to control in operation conditions and suitable for industrial production, and achieves the purpose of resource utilization of wastes.