89results about How to "Strong industrial application value" patented technology

The invention discloses a catalytic system used for synthesizing cyclic carbonate ester. The catalytic system comprises a catalyst with structural unit shown in formula I and quaternary ammonium salt shown in a general structure of formula II, wherein n is equal to 1-4 in the general structure of formula II. The catalytic system is suitable for catalyzing the reaction system in which carbon dioxide reacts with epoxy compound to synthesize the cyclic carbonate ester, in the reaction system, all the various epoxy compounds are applicable to the method, such as propylene oxide, epoxy chloropropane, styrene oxide, 2,3-glycidyl phenyl ether or cyclohexene oxide; the reaction temperature is 30-80 DEG C; the pressure of carbon dioxide is 2-12 MPa; and reaction time is 1-24 h. Compared with the conventional method, the catalytic system has the advantages of mild reaction condition, high recovery rate and high selectivity, and reuse of the major catalyst metal-organic coordination polymer (MOF-5) by simple filtration. Therefore, the catalytic system has strong industrial application value.

The invention relates to a layered catalyst for selectively oxidizing 4-methylguaiacol-to-vanillin, and a preparation method thereof, and belongs to the technical field of catalysts. A coactive site is added to change the electronic structure of a main catalytic active site Co; and anions with different selective dear anion effect by inserting different hydrophilic and hydrophobic properties are inserted into an interlayer in order to influence the selectivity on products. One or more of magnesium, zinc, copper, aluminum, iron, nickel, manganese, titanium, samarium, calcium, cerium and chromium, gallium, indium, tin and other elements is/are added as a coactive component. The preparation method comprises the following steps: preparing a solution by using nitrates or chlorides of active components and the coactive component(s), adding a precipitating agent, carrying out a heating reaction, washing a solid substance, and drying; adding the prepared layered hydrotalciteinto a solution containing anions to be exchanged, and carrying out an ion exchange process to obtain the intercalated hydrotalcite catalyst. The prepared catalyst can be applied to the oxidation reaction of 4-methylguaiacol. The catalyst has high activity and has high selectivity to vanillin.

The invention provides a preparation method for synthesizing 1-acetyl-7-cyanopyridine-5-(2-amino propyl) indoline which is a key intermediate of silodosin. The method comprises the following steps: 1-acetylindoline is adopted to serve as the material, and 1-acetyl-7-cyanopyridine-5-(2-amino propyl) indoline can be obtained through the such 7 steps as friedel-crafts acylation reaction, phthalimide amination, alkylsilane reduction, nitrification, reduction, heavy nitrogen cyaniding and deprotection. According to the method, the materials in the whole synthesizing line are cost-saving and easy to obtain, the operation is simple and the operation cost is low. Moreover, the yield rate of each step of reaction is higher than that in the prior art. Therefore, the method provided by the invention is very suitable for industrial production and has larger industrial application value.

The invention relates to a preparation method of pyridine-2-formaldehyde. The preparation method comprises the following two steps: preparing an acidity-regulator-containing supported catalyst with titanium dioxide used as a carrier, molybdenum bismuth oxide used as a main body and transition metal oxide used as an auxiliary, carrying out gas-phase oxidation reaction on 2-methyl pyridine, oxygen and water used as raw materials in a fixed bed catalytic reactor at 250-350 DEG C to obtain a crude pyridine-2-formaldehyde product, extracting the crude product with dichloromethane, carrying out pressure-reduced distillation on the extract to remove dichloromethane, and then rectifying to obtain a pure product with a pyridine-2-formaldehyde content more than 98%. The preparation method provided by the invention has the advantages of simple preparation process, high efficiency, low cost, high catalytic reaction activity and selectivity, easy separation of main products and by-products and high purity.

The invention provides a method for producing expanded graphite/metal oxide composite used in a super electrode capacitor. The raw materials including 5-99 percent of expanded graphite and 1-95 percent of transition metal oxide by weight percentage are prepared and then processed according to the following steps: (a) the transition metal oxide nanometer particles are uniformly dispersed into water solution through surface active agents to prepare the stable dispersion liquid of inorganic nanometer particles, and the weight ratio of the nanometer particles is 1-70 percent; and (b) the expanded graphite is immersed into the stable dispersion liquid of the inorganic nanometer particles prepared in the step (a) to be stood for 10 to 24 hours at the indoor temperature and then is dried for 4 to 20 hours at 100-200 DEG C to obtain the expanded graphite/metal oxide composite. The method has simple production technology, low cost and has high industrial application value.

The invention relates to a halohydrin dehalogenase mutant for improving enantioselectivity and application thereof, and belongs to the technical field of enzyme engineering and biocatalysis. The halohydrin dehalogenase mutant is obtained by carrying out single-point mutation or combined mutation on 89th arginine, 137th valine, 178th proline, 179th asparagine and 187th phenylalanine in a sequence as shown in SEQ ID NO.1. Compared with wild type halohydrin dehalogenase, the mutant obtained by the invention obviously improves enantioselectivity (E value) during the preparation of (S)-o-nitrophenyl glycidyl ether, (R)-benzyl glycidyl ether and (R)-phenyl glycidyl ether, the maximum improvement is 44.6, 2.9 and 9.4 times of the original enzyme respectively, and has good industrial application prospect.

The invention relates to a catalyst for flue gas denitration, and a preparation method and an application thereof. The catalyst is composed of a carrier, an active component and an assistant, the carrier is titanium dioxide, the active component is iron element, the assistant is europium element, and a molar ratio of the iron element to the europium element to the titanium element is 0.15:0.02:1.The preparation method of the catalyst is mainly a co-precipitation method. The finally prepared catalyst can treat nitrogen oxides in exhaust gas discharged from a gas turbine for power generation and a coal-fired boiler, can significantly improve the activity and catalytic ability of low-temperature denitration, makes the nitrogen oxide removal rate at 250 DEG C achieve 90% or above, has great industrial application values, and can be widely used for the NH3-selective catalytic reduction of nitrogen oxides.

The invention provides a preparing method of a key intermediate 1-(3-benzoyloxy propyl)-5-(2-oxopropyl)-7-indolinecarbonitrile for synthesizing Silodosin. Materials in the whole synthetic route are cheap and easy to obtain, reaction steps are few, the operation is simple, the operation cost is low, yield coefficients of all reaction steps are far higher than those of the existing synthetic route, the preparation method is quite suitable for industrial production and is provided with high industrial application values.

The invention discloses a 2-cyclohexene-1-ketone preparation method which comprises the following steps: (1) performing a 1-8 hours' reaction on a raw material which comprises alkyl vinyl ether, a 1,3-dicarbonyl compound and formaldehyde at 50-110 DEG C, and performing separation to obtain a 2-alkoxyl-3,4-dihydropyran derivative, wherein the molar ratio of the 1,3-dicarbonyl compound to the alkyl vinyl ether is (3-1):(1-3), and the molar ratio of the 1,3-dicarbonyl compound to formaldehyde is 1:(1-3); (2) putting the 2-alkoxyl-3,4-dihydropyran derivative obtained in the step (1) in an acid alcohol medium for a 1-8 hours' reaction at 0-100 DEG C, so as to obtain 2-cyclohexene-1-ketone. Compared with the conventional cyclohexene oxidation and cyclohexanone bromination methods, the 2-cyclohexene-1-ketone preparation method provided by the invention has the advantages of being high in reaction selectivity, easy for product separation, low in environmental pollution, very high in industrial application value, and the like.

The invention provides a method for synthesizing 2,5-dihydroxybenzaldehyde. The method comprises the following steps: with p-dimethoxybenzene as a raw material, carrying out bromination reaction, Grignard reaction and demethylation reaction to obtain the 2,5-dihydroxybenzaldehyde. The preparation conditions are mild, the process is simple, and the industrial application value is high.

The invention discloses a polyvinyl chloride elastomer containing fumed silica. The polyvinyl chloride elastomer is prepared from the following raw materials in parts by mass: 65-75 parts of polyvinylchloride, 20-30 parts of nitrile rubber, 14-22 parts of filler, 6-10 parts of plasticizer, 1-3 parts of a flame retardant, 1-2 parts of an antistatic agent and 0.6-1 part of a foaming agent. Variousproperties of the fumed silica-containing polyvinyl chloride elastomer prepared by the preparation method disclosed by the invention meet index requirements in GB/T 8815-2008 plasticized polyvinyl chloride compounds for wire and cable, and the fumed silica-containing polyvinyl chloride elastomer has good thermal stability, light stability, insulativity, flame retardancy, antistatic property, thermal insulation property and mechanical properties. Besides, the polyvinyl chloride elastomer containing fumed silica prepared by the invention can be used for preparing underground cables, overhead cables and other wires and cables, the preparation process flow is simple, and the polyvinyl chloride elastomer containing fumed silica has very strong industrial application value and development prospect.

The invention discloses a method for synthesizing methyl p-bromo-methyl benzoate through channelization and a reaction device. The method comprises the steps: methyl p-methyl benzoate is taken as a raw material, bromine generated by oxidizing hydrobromic acid through hydrogen peroxide is taken as a bromination reagent, materials are continuously input into an efficient mixer through a metering pump to be mixed and then enter a pipeline reactor, a reactant is subjected to a bromination reaction in the pipeline reactor through temperature control and illumination and then collected by a receiving tank, and after an obtained reaction solution is quenched, separated, dried, concentrated and subjected to recrystallization purification, a pure methyl p-bromo-methyl benzoate product is obtained.The bromination reaction has the high bromine atom utilization rate, fewer byproducts and fewer solid wastes, and conforms to the concept of green chemistry; and a continuous pipeline reaction is goodin safety, short in reaction time and high in production efficiency, and has industrial production and application value.

A transparent projection film comprises a transparent base material layer and a lens layer, wherein the lens layer is compounded on the base material layer and comprises a plurality of prism units. The plurality of prism units are integrally formed or integrally connected, and hollow grooves are formed between the prism units; and each prism unit comprises a first side face, a second side face anda top face, wherein the top face is located between the first side face and the second side face and opposite to the base material layer. The transparent projection film mainly comprises the base material layer and the lens layer. When the surface of each prism unit is frosted, the transparent projection film can be used as a rear projection screen; and when a reflecting layer is arranged on thesurface of the prism unit, the transparent projection film can be used as a front projection screen. Compared with the prior art, the transparent projection film is very simple in structure and very easy to process and implement, and can achieve a projection effect basically similar to that of an existing projection screen, so that the transparent projection film has very high industrial application value and very high practicability.

The invention discloses a method for realizing comprehensive recovery of valuable elements in an aluminum-based petroleum refining catalyst by utilizing reducing gas. The method comprises the following steps that spent catalyst is preatreated by adopting a reduction heat treatment process, and the three kinds of valuable metal elements in the spent catalyst generate an aluminum salt capable of being dissolved in water, metal elementary substance nickel cobalt with magnetism and acid solubility, and acid-resistant and alkali-resistant rare metal low-valence oxide, a simple substance or a carbide correspondingly, so that the property difference of the valuable elements compound to be recycled is expanded; the aluminum oxide is extracted by using an aqueous solution or an alkali solution, thenickel and cobalt are extracted through magnetic separation or acid solution leaching, and the rare metals are enriched and recycled in the leaching residues. The method has the advantages that the process is simple and reasonable, the used reducing agent is economic and environment-friendly, efficient separation and comprehensive recovery of the valuable elements in the spent catalyst can be realized at the same time, and the economic benefits are remarkable and the like.

The invention provides a moisture-absorbing and quick-drying finishing method for a cotton knitted fabric, and relates to the technical field of textile processes. The method comprises the following steps: pretreating a fabric, padding the pretreated fabric by using a moisture-absorbing and quick-drying finishing agent, drying the padded fabric, rolling the dried fabric, enabling water-repellent microcapsules in the moisture-absorbing and quick-drying finishing agent to be broken and a water repellent to enter the fabric, and baking at high temperature to obtain the moisture-absorbing and quick-drying fabric. Countless micro water-repellent points are formed on the surface and inside of the fabric, spreading of water on the surface of the fabric is facilitated, permeation of the water into fibers is reduced, the water can be rapidly spread on the surface of the fabric, and therefore the evaporation rate of the cotton fabric is increased, and the good moisture-absorbing and quick-drying finishing effect is achieved.