35results about How to "Less industrial waste" patented technology

The invention discloses a preparation method of a nano Ru/C supported catalyst. The method comprises steps as follows: treated activated carbon is added to a ruthenium slat aqueous solution, stirring and dipping are performed for 0.5-4 h, then an alkaline compound aqueous solution is used for adjusting the pH of mixed slurry of activated carbon and ruthenium salt to 7-12, the mixed slurry is stirred continuously for 1-6 h, left to stand for 2-4 h and filtered, a filter cake is washed with water to be neutral and free of chloride ions and dried at the temperature of 80-120 DEG C for 4-12 h, and a treated Ru/C precursor is obtained; the treated Ru/C precursor is subjected to sectioned calcination in the inert atmosphere; a product after calcination is reduced, and then the nano Ru/C supported catalyst with high dispersion is obtained. The particle size of ruthenium particles of the catalyst is 1-4 nm. The method is low in production cost, has mild preparation conditions and causes few three industrial wastes, and the catalyst has advantages of long service life and the like.

The invention discloses a hexafluoropropylene-2-butyne synthesizing method. Hexachlorobutadiene (CCl2=CCl-CCl=CCl2) is taken as the raw material to generate hexafluoropropylene-2-butyne under the action of a catalyst, the raw material hexachlorobutadiene is easy to obtain and low in cost. The gaseous-phase circulating fluorination method is adopted, the discharge level of three industrial wastes is low, the yield of products is high, and production cost is reduced greatly; the gaseous-phase circulating fluorination method is conducted at normal temperature, the traditional high-pressure telomerization process route is avoided, and risks in industrial safety production are reduced greatly; meanwhile, the method has the advantage that operation is easy and is totally suitable for industrial production.

The invention relates to an emulsifiable concentrate pesticide containing 2.4% of oxymatrine, which belongs to the field of botanical pesticides. The pesticide mainly comprises 20% of sophora flavescens, 20% of castanopsis sclerophylla, 10% of tobacco, 5% of derris, 5% of tripterygium wilfordii, 20% of pterocarya stenoptera, 6% of hops, 4% of humulus scandens, and 10% of zanthoxylum schinifollum. The pesticide is able to kill the pests mainly in a contact killing manner and has characteristics of high decomposition speed, no residual, no pollution to the family environment and the like. The pesticide has obvious preventing and killing effect on multi-species of pests, such as Lepidoptera, Hemiptera, Coleoptera, Homoptera, Diptera and the like, in vegetables, fruit trees, flowers, forest trees, and field crops.

The present invention discloses a nano-ruthenium carbon catalyst and a preparation method and an application thereof. The catalyst comprises activated carbon, and active ruthenium particles and auxiliary components loaded thereon; and the auxiliary components comprise zinc, copper, nickel, etc. The preparation method comprises the following steps: activated carbon is soaked in an aqueous solutionof ruthenium salt; a basic compound is added; stirring, putting still, filtering, drying and calcination are conducted to obtain a first ruthenium carbon precursor; then the first ruthenium carbon precursor is soaked in an auxiliary aqueous solution; then the basic compound is added; stirring, putting still, filtering and drying are conducted to obtain a second ruthenium carbon precursor; under aprotective atmosphere, the second ruthenium carbon precursor is subjected to a staged calcination treatment to obtain a third ruthenium carbon precursor; and then a reduction treatment is conducted toobtain the catalyst. The catalyst can be reused 100 times or more in a reaction of hydrogenating aromatic ring compounds to prepare cyclohexyl derivatives, and has advantages of long service life, low production cost, mild reaction conditions, high product purity, less three industrial wastes, etc.

The invention discloses cement-based composite anti-crack binding dry mortar and preparation and application methods thereof. The cement-based composite anti-crack binding dry mortar comprises, by mass, 300-400 parts of ordinary Portland cement, 600-700 parts of quartz sand, 0.3-0.6 part of anti-crack fiber, 2-3 parts of cellulose ether, 20-30 parts of latex powder and 20-25 parts of fly ash. Thepreparation method includes the steps of firstly, weighing the raw materials according to the mass; secondly, evenly mixing the weighed raw materials in an agitator to obtain the cement-based composite anti-crack binding dry mortar. The application method includes the steps of firstly, weighing the cement-based composite anti-crack binding dry mortar and water of corresponding mass, wherein the mass ratio of the cement-based composite anti-crack binding dry mortar to the water is (100-200):100; secondly, evenly mixing for use. The cement-based composite anti-crack binding dry mortar is convenient to operate, easy to control, capable of being used after being sufficiently mixed with an appropriate amount of water, high in binding force, good in water resistance, good in crack resistance, good in permeability resistance and the like.

The invention provides a synthetic method for 1-phenyl-1,2-ethanediol. The synthetic method comprises the following steps: (1) performing a reaction: adding styrene oxide, a phase transfer catalyst, 2-chloroethylaminehydrochloride, an inorganic alkali and water into a flask with a thermometer and a reflux condenser pipe, performing stirring, and performing a heating reflux reaction; (2) performingend point monitoring: performing monitoring on the reaction of the step (1) by adopting an HPLC, and determining the reaction end point when the raw material styrene oxide disappears; and (3) performing extraction: when the reaction of the step (1) reaches the reaction end point, stopping heating, cooling the system to room temperature, performing extraction by using an organic solvent, separating and taking an organic layer, and performing decompression exsolution to obtain a white solid. The prepared product provided by the invention has high purity, a high yield and reduced three industrial waste (waste water, waste gas and solid waste), is friendly to the environment, and meets the requirements of the green chemistry process.

The invention relates to a preparation method of calcium glucarate, and belongs to the field of pharmacy. The invention provides a preparation method of the calcium glucarate. The preparation method comprises the following steps: (1) putting glucose, oxygen and a metal catalyst palladium vanadium ammonium into a high-pressure reactor for catalytic oxidation reaction to obtain glucaric acid; (2) after the oxidation reaction, adding potassium-containing alkali to convert the glucaric acid into potassium gluconate; (3) enabling the potassium gluconate to react with an acid to release the glucaricacid; (4) enabling the glucaric acid to react with the calcium-containing alkali to obtain the calcium glucarate. The preparation method disclosed by the invention is pollution-free to the environment, and meanwhile, the total yield is increased; the catalyst can be repeatedly used; the cost is reduced; the calcium content is 98 to 102 percent; a small amount of industrial wastewater, waste residues and waste gas are generated; the preparation method is suitable for industrial production.

The invention discloses a preparation method of 1,1,1,2,4,4,4-heptafluoro-2-butene. The method uses hexachlorobutadiene and hydrogen fluoride as raw materials and uses a chromium-based catalyst as a fluorine-chlorine exchange catalyst to form the 1,1,1,2,4,4,4-heptafluoro-2-butene under gas phase conditions through a plurality of gas-phase catalytic reactions. Compared with the prior art, the preparation method of the 1,1,1,2,4,4,4-heptafluoro-2-butene provided by the invention has the following advantages: 1, the gas phase fluorination method adopted in the method is a cycle fluorination method, has less three industrial wastes (waste water, waste gases and solid waste), and greatly reduces the production costs; 2, the method can realize rapid and multiple-cycle fluorination, improve a product yield, and have simple separation and purification of the product; and 3, the method has the advantages of cheap raw materials, convenient sources and simple operation, and is suitable for industrialized production.

The invention discloses a preparation method of pusaimode. Bromo-benzene and benzene are used as initial raw materials to prepare pusaimode by adopting a convergent synthesis route. The yield of the preparation method is high, the cost is low, the amount of generated waste water, waste gas, and waste solids is low, the operation is convenient, and the application value is high.

The invention relates to a method for synthesizing 3,4-difluorocyclobutene through gas phase catalysis, and belongs to the field of organic chemical synthesis. According to the method, hexachlorobutadiene (the molecular formula is CCl2=CCl-CCl=CCl2), chlorine gas (the molecular formula is Cl2) and anhydrous hydrogen fluoride (the molecular formula is HF) generate 1,2,3,4-tetrachloro-3,4-difluorocyclobutene (the molecular formula is Cyclo-CFCl-CFCl-CCl=CCl-) in a gas phase manner under the action of a cyclofluorination catalyst; and under the action of a hydrodechlorination catalyst, the 1,2,3,4-tetrachloro-3, 4-difluorocyclobutene and hydrogen generate 3,4-difluorocyclobutene (the molecular formula is Cyclo-CFH-CFH-CH=CH-) in a gas phase manner. According to the invention, the method has characteristics of cheap and easily-available raw materials, simple separation and purification of the product and less industrial three-waste, and is suitable for industrial production.