38results about How to "Low total production cost" patented technology

The invention discloses an intermediate N-Boc-3-aminopiperidine and a synthesizing method of optical isomer thereof. The prior synthesizing route has the disadvantages of high requirements on reaction conditions, high possibility of racemization, a great number of byproducts, as well as difficult post-treatment and difficult industrialization. The synthesizing method comprises the following steps: taking halogenated hydrocarbon as a solvent and organic alkali as an acid-binding agent, 3-piperidine ethyl formate is added with di-tert-butyl dicarbonate by dripping at temperature of 0-10 DEG C to obtain N-Boc-3-piperidine ethyl formate; 1,4-dioxane is used as a solvent, the N-Boc-3-piperidine ethyl formate undergoes ammonolysis reaction to obtain N-Boc-3-piperidine formamide; and the N-Boc-3-piperidine formamide is added by dripping in a solution with sodium hypochlorite and sodium hydroxide to obtain N-Boc-3-aminopiperidine. The invention has the advantages of no racemization during the reaction, high optical purity of the product, relatively moderate reaction conditions, simple operation, low total production cost, and easy large-scale industrial production.

The invention relates to a production process of unfired building ceramic. The production process comprises the following steps: (1) drying and dehydrating: drying and dehydrating gypsum to obtain semi-hydrated gypsum; (2) carrying out compression moulding: mixing the semi-hydrated gypsum with water in a mass ratio of 100 to (6-25) and quickly stirring uniformly, and then carrying out compression moulding to obtain ceramic blanks; (3) soaking in water to hydrate: overlying the obtained ceramic blanks which are separated by cotton cloth, putting the ceramic blanks into a hydrating slot, and putting the overlaid ceramic blanks and the hydrating slot under a press, applying pressures by virtue of the press, maintaining the pressure unchanged, introducing water into the hydrating slot and soaking the ceramic blanks for 1-3 hours; and (4) naturally drying. By using gypsum as a raw material, the production process of unfired building ceramic is low in production cost, simple in process and free of high-temperature firing and has better energy conservation and emission reduction effects, and the prepared unfired building ceramic is good in performance.

The invention discloses an intermediate N-Boc-3-aminopiperidine and a synthesizing method of optical isomer thereof. The prior synthesizing route has the disadvantages of high requirements on reactionconditions, high possibility of racemization, a great number of byproducts, as well as difficult post-treatment and difficult industrialization. The synthesizing method comprises the following steps:taking halogenated hydrocarbon as a solvent and organic alkali as an acid-binding agent, 3-piperidine ethyl formate is added with di-tert-butyl dicarbonate by dripping at temperature of 0-10 DEG C toobtain N-Boc-3-piperidine ethyl formate; 1,4-dioxane is used as a solvent, the N-Boc-3-piperidine ethyl formate undergoes ammonolysis reaction to obtain N-Boc-3-piperidine formamide; and the N-Boc-3-piperidine formamide is added by dripping in a solution with sodium hypochlorite and sodium hydroxide to obtain N-Boc-3-aminopiperidine. The invention has the advantages of no racemization during thereaction, high optical purity of the product, relatively moderate reaction conditions, simple operation, low total production cost, and easy large-scale industrial production.

The invention belongs to the technical field of chemical engineering and particularly relates to calcium stearate and a preparation process thereof. The calcium stearate is prepared from tristearin, a catalyst A, an antioxidant, water, calcium oxide, a catalyst B and sodium hydroxide, wherein the catalyst A is a mixture of calcium hydroxide and Al2O3-MgO, and the antioxidant is a mixture of DLTDP and an antioxidant T501; the catalyst B is selected from one or more of peroxides. The calcium stearate is low in raw material cost, high in yield, good in color, low in free acid content, high in melting point and stable in property, and related quality indexes meet the requirement of Chemical Industry Standard of the People's Republic of China HG / T 2424-2012 Calcium Stearate for superior products. The preparation process of the calcium stearate is safe and environment friendly in production process, low in energy consumption and low in overall production cost, and is more practical and comparable than similar products on the market in practical application.

The invention discloses an ultra quiet fast laser switch capable of performing time-sharing power control, which belongs to the technical field of photoelectric detection and control. The ultra quietfast laser switch capable of performing time-sharing power control comprises a DC motor, a fixing frame, a photoelectric detector, a detector mounting blade, rubber gaskets, a motor driving circuit, adigital control module, a laser intensity modulator and the like. The invention also discloses a control method for the ultra quiet fast laser switch capable of performing time-sharing power control.Quick laser switching can be realized, noise during a switching process is greatly reduced, and the laser intensity can be directly controlled.

The invention belongs to the technical field of chemical engineering, and particularly relates to high-quality zinc stearate prepared from glyceryl tristearate. A preparation technology of zinc stearate comprises the following steps that 1, glyceryl tristearate and water are hydrolyzed under the action of a catalyst and an antioxidant; 2, zinc oxide and a catalyst are added stepwise, condensing, dewatering and salt forming are conducted, and zinc stearate is synthesized. Zinc stearate is high in preparation yield, good in color and cluster, low in free acid content and stable in quality, and the related quality indexes meet the related requirements on I type zinc stearate in HG / T3667-2012; in addition, no wastewater containing chlorine and sulfate ions is discharged in the preparation process of zinc stearate, the production process is safe and environmentally friendly, and the total production cost is low. Zinc stearate is high in quality and has the better practicability and comparability compared with similar products on the market in practical application.

The invention discloses a graphene alloy composite phase change material as well as a preparation method and application thereof, an organic metal compound is adopted to modify graphene, the internal heat conductivity coefficient between graphene layers is greatly improved, and meanwhile, liquid metal with a very high heat conductivity coefficient is used for dopping, and the graphene alloy is compounded with a phase change matrix material to obtain the novel graphene alloy composite phase change material. The anisotropic heat-conducting property of the graphene is greatly improved by the organic metal modified graphene, and the heat-conducting property of the composite phase change material is further improved.

The invention is directed at the field of chemical engineering and provides a cheap preparation method for high purity D,L-methionine. The preparation method comprises the following steps: preparing a hydrocyanic acid gas mixture by using an Andrussow process; fully reacting the hydrocyanic acid gas mixture with methylthiopropionaldehyde under the catalysis of base so as to prepare a 2-hydroxy-4-methylthiobutyronityile system; reacting the 2-hydroxy-4-methylthiobutyronityile system with ammonia under the conditions of heating and pressurization and carrying out pressure reduction and deamination so as to obtain 2-amino-4-methylthiobutyronityile; and subjecting 2-amino-4-methylthiobutyronityile to acidolysis with inorganic acid so as to obtain D,L-methionine. According to the invention, raw materials used in the method are cheap and easily available, the intermediate 2-hydroxy-4-methylthiobutyronityile has stable properties, prepared 2-amino-4-methylthiobutyronityile has high yield and high purity, and D,L-methionine obtained after continued production has the advantages of high yield, high purity, great bulk density and low total production cost.

The invention relates to a comprehensive recovery method for zinc, nickel and cobalt-containing purification slag. The method comprises the following steps: washing the zinc, nickel and cobalt-containing purification slag with hot water till the content of sulfate radicals or chlorine ions of a lotion is smaller than 1g / L and then leaching the purification slag with sodium hydroxide; obtaining zinc and cobalt-containing alkaline leaching liquor and leached slag primarily containing nickel; putting the alkaline leaching liquor in a magnetic field and performing diaphragm electrolysis by takinga magnetic material as an anode and a stainless steel plate as a cathode to obtain metal zinc powder in a cathode region and the cathode and anode slurry primarily containing Co2O3 and Co3O4 in an anode region and the anode; washing and drying the anode slurry, reducing the same directly with hydrogen to obtain metal cobalt powder or sulfuric acid leached out, precipitating oxalic acid to obtain cobalt oxalate, then reducing the cobalt oxalate with hydrogen to obtain metal cobalt powder, and electrolyzing metal cobalt; returning the alkaline residual electrolyte to leach zinc, nickel and cobalt purification slag; and washing the nickel-containing leach residue and leaching the same with sulfuric acid, and enriching the same and performing electrolysis to obtain metal nickel. The method provided by the invention is short in process flow, high in separating recovery rate of zinc, nickel and cobalt and small in wastewater and waste residue amount.

The invention is directed at the field of chemical engineering and provides a preparation method for calcium D,L-2-hydroxy-4-methylthiobutyrate. The preparation method comprises the following steps: preparing a hydrocyanic acid gas mixture by using an Andrussow process; preparing a 2-hydroxy-4-methylthiobutyronityile system with the hydrocyanic acid gas mixture and methylthiopropionaldehyde as starting raw materials; hydrolyzing the 2-hydroxy-4-methylthiobutyronityile system with inorganic base so as to obtain D,L-2-hydroxy-4-methylthiobutyrate; and chelating D,L-2-hydroxy-4-methylthiobutyrate with a soluble calcium salt so as to produce calcium D,L-2-hydroxy-4-methylthiobutyrate. The method has the advantages of a few processing step, cheap and easily available raw materials, stable intermediate properties and low total production cost. Prepared calcium D,L-2-hydroxy-4-methylthiobutyrate has the advantages of high yield, high purity, a powder crystal form and great bulk density, can be used as an animal feed additive for effective mixing with a feed so as to supplement trace elements and amino acid in daily ration and improve production performance and immune performance of animals and can also be used as a medicine reagent.

The invention belongs to the technical field of chemical industry, and particularly relates to a technique for synthesizing zinc stearate from glyceryl tristearate. The technique comprises the following steps: 1) hydrolyzing glyceryl tristearate and water under the actions of a catalyst and an antioxidant; and 2) adding zinc oxide and a catalyst in multiple steps, and carrying out condensation, dewatering and salification to synthesize the zinc stearate. By using the technique provided by the invention, no wastewater containing chlorine and sulfate ions is discharged in the process; the production process is safe and environment-friendly and has low total production cost; and the synthesized zinc stearate has the advantages of high yield, favorable color and low free fatty acid content, satisfies the relevant quality standard for Type I zinc stearate in HG / T3667-2012, and has higher practicality and comparability than like products in the market in practical application.

The invention provides a method for preparing a photoinduced ultra hydrophilic automatically cleaning paint, comprising the following steps: (1) preparing titanium dioxide suspension by using titanium hydroxide; (2) preparing cerium-doped anatase titanium dioxide for subsequent use; (3) placing waterless ethanol, ammoniacal liquor, distilled water and ethyl orthosilicate which is added later intoa reactor and magnetic stirring uniformly; (4) magnetic stirring the mixed liquor prepared in step (3) for more than 3 h in a constant temperature bath of 80 DEG C to obtain silica sol; (5)mixing thecerium-doped anatase titanium dioxide prepared in step (2), silica sol prepared in step (4) with waterless ethanol and stirring uniformly to obtain the photoinduced ultra hydrophilic automatically cleaning paint. The photoinduced ultra hydrophilic automatically cleaning paint has the advantages of simple use and convenient. The preparation method has the advantages of low energy consumption, saving heat treatment equipment, and low cost.

The invention discloses a preparation process of an organic ash-free antiknock agent. A mixed solution of methyl acrylate and ethanol is slowly dropwise added into a diethylenetriamine solution with stirring and nitrogen protection, an alumina catalyst and an antioxidant are added, a transparent yellowish liquid is obtained by carrying out a reaction with stirring, the liquid is added to a reaction kettle, a mixed solution of o-cresol, formaldehyde and ethanol is added, the reaction temperature is risen to be 80-90 DEG C, the mechanical stirring is performed for 3-4 h, T151A is added to S2, the ethanol reflux is performed, a reaction is carried out while stirring, standing is performed, and solvents are removed by rotary evaporation or vacuum distillation to obtain the organic ash-free antiknock agent. The preparation process has the following advantages that the preparation process is reasonable, the yield is high, the production process has no chlorine and sulfur emissions, the preparation process is safe and environmental-friendly, the energy consumption is relatively low, and the total production cost is low. The induction period of gasoline can be prolonged, and the real gum content can be reduced, so that the quality of the antiknock gasoline can be ensured, and the antiknock agent has the functions of anti-oxidation and oil sludge cleaning dispersion.

The invention belongs to the technical field of chemical engineering, and particularly relates to high-quality zinc stearate prepared from glyceryl tristearate. A preparation technology of zinc stearate comprises the following steps that 1, glyceryl tristearate and water are hydrolyzed under the action of a catalyst and an antioxidant; 2, zinc oxide and a catalyst are added stepwise, condensing, dewatering and salt forming are conducted, and zinc stearate is synthesized. Zinc stearate is high in preparation yield, good in color and cluster, low in free acid content and stable in quality, and the related quality indexes meet the related requirements on I type zinc stearate in HG / T3667-2012; in addition, no wastewater containing chlorine and sulfate ions is discharged in the preparation process of zinc stearate, the production process is safe and environmentally friendly, and the total production cost is low. Zinc stearate is high in quality and has the better practicability and comparability compared with similar products on the market in practical application.

The invention belongs to the technical field of chemical engineering and particularly relates to calcium stearate and a preparation process thereof. The calcium stearate is prepared from tristearin, a catalyst A, an antioxidant, water, calcium oxide, a catalyst B and sodium hydroxide, wherein the catalyst A is a mixture of calcium hydroxide and Al2O3-MgO, and the antioxidant is a mixture of DLTDP and an antioxidant T501; the catalyst B is selected from one or more of peroxides. The calcium stearate is low in raw material cost, high in yield, good in color, low in free acid content, high in melting point and stable in property, and related quality indexes meet the requirement of Chemical Industry Standard of the People's Republic of China HG / T 2424-2012 Calcium Stearate for superior products. The preparation process of the calcium stearate is safe and environment friendly in production process, low in energy consumption and low in overall production cost, and is more practical and comparable than similar products on the market in practical application.

The invention discloses a strain of bacillus licheniformis with high protease production and a method for fermenting and producing the enzyme. The Bacillus licheniformis GZ73 provided by the present invention is referred to as Bacillus licheniformis GZ73 for short, and the preservation number is CGMCC No.18048. The invention also protects the application of Bacillus licheniformis GZ73 in the production of protease. The protease is prepared by fermenting Bacillus licheniformis GZ73, which has high enzyme production efficiency, low raw material cost, high enzyme activity of fermented liquid, high yield of enzyme extraction and purification process, and low total production cost. The enzyme preparation provided by the invention can be widely used in industries such as feed, food, detergent and the like.