61results about How to "Response conditions are relaxed" patented technology

The invention discloses a synthetic method of titanium dioxide self-assembled particles. According to the synthetic method, water is taken as a solvent, TiCl4 or an organic alkanol titanium oxide is taken as a titanium oxide precursor, an alkylammonium hydroxide is added as a protective agent, and cauliflower-shaped and rod-shaped titanium dioxide nanoparticles are synthesized via hydrothermal method. The synthetic method is simple; synthetic conditions are not strict; operation is simple; the prepared titanium dioxide nanoparticles possess cauliflower-shaped or rod-shaped appearance, and a structure which is formed via self-assembly of titanium dioxide nanowires along an axial direction. The synthesized titanium dioxide possesses relatively high photocatalytic activity.

The invention provides a preparation method for hydrogenated bisphenol A and a catalyst for hydrogenation of bisphenol A. The preparation method comprises hydrogenating bisphenol A at a temperature of 50-100 DEG C, under a hydrogen pressure of 5-10 MPa and at presence of a solvent isopropanol and a ruthenium catalyst, so as to generate hydrogenated bisphenol A, wherein the ruthenium catalyst is a Ru-Zn-Ni/TiO2-CdO catalyst, that is, the ruthenium catalyst takes zinc and nickel as auxiliary active compositions and takes titanium dioxide and cadmium oxide as a composite carrier. The conversion rate of bisphenol A can reach 100%, meanwhile the selectivity of hydrogenated bisphenol A is larger than 97%, and the purity of hydrogenated bisphenol A is 99.5% or more.

The invention belongs to the fine chemical field, which is mainly used for the synthesis of rubber accelerator NS and the intermediate raw material of the rifampicin-tert-butylamine. The invention is characterized in that: the methyl tert-butyl ether-hydrocyanic acid method is adopted to produce tert-butylamine; under normal pressure, the methyl tert-butyl ether is added with hydrocyanic acid and is added with concentrated sulphuric acid to carry out fully catalytic reaction; the methanol produced in the catalytic reaction is fully adopted and is added with water to perform hydrolysis, deep hydrolysis and esterification, and methyl formate and methanol without react completely are distilled; sulphates in calcium hydroxide solution and the butylamine to replace the butylamine to gain the butylamine through rectification and produce the byproduct calcium sulfate. The invention adopts the water instead of the methanol to carry out the hydrolysis and esterification and neutralizes the raw materials and adopts the calcium hydroxide to produce butylamine, which has the advantages of simple process, short production period, high yield, stable product quality, low production cost and small environment pollution.

The invention provides a method of manufacturing plaster crystal whiskers by utilizing calcium citrate and belongs to the field of fine chemical manufacturing technology. Combined with the citric acid manufacturing technique, the invention manufactures plaster crystal whiskers while the calcium citrate is acidolysised to generate citric acid. The invention includes the following steps: firstly, after the sulphuric acid is added in, the calcium citrate serum is well stirred, placed in an autoclave for reaction at a temperature of 120 to 130 EDG C for 10 to 50 minutes and then cooled to be filtered; and secondly, the filtrate is used for crystallizing and separating out the citric acid product. The filtering medium is washed in water for 1 to 3 times, drained and then dried at a temperature of 80 to 100 DEG C and finally plaster crystal whiskers with a length of 50 to 400 micrometers, a diameter of 1 to 4 micrometers and a diameter ratio of 40 to 160 are obtained. The invention generates plaster crystal whiskers from the medium rich in citric acid by using the hydrothermal method, the reacting conditions are loose, the quality of the crystal whisker is obviously enhanced and the manufacturing cost for the crystal whisker is greatly reduced.

The invention relates to a bicomponent transparent finishing fire retardant coating and a preparation method thereof. The preparation method includes steps of using polyphosphoric acid, pentaerythritol and polyethylene glycol to obtain polyethylene glycol grafted polyphosphate by means of a fusion synthesis method and mixing and blending a component A and a component B to obtain the bicomponent transparent finishing fire retardant coating, wherein the component A is an aqueous solution or an absolute ethyl alcohol solution of the grafted polyphosphate, and the component B is an aqueous amino resin. According to the obtained bicomponent transparent finishing fire retardant coating, the flexibility of a coating film is greatly improved on the basis of a good fire retardant performance of the coating, and the preparation method of the bicomponent transparent finishing fire retardant coating is easy and simple to operate.

The invention discloses polyether amine for a textile printing and dyeing auxiliary and a preparation method. The preparation method includes: adding trimethylolpropane serving as initiator and catalyst KOH (potassium hydroxide) into a reaction kettle, and sequentially feeding epoxyethane and epoxypropane into the reaction kettle so that a polyether crude product is prepared by means of reaction; neutralizing and adsorbing the reactant prior to filtering dehydration, and then refining through reduced pressure distillation and dehydration so that polyether is prepared; and adding the prepared polyether, supported catalyst, liquid ammonia and hydrogen so that the polyether amine for the textile printing and dyeing auxiliary is prepared. The polyether amine serves as a textile printing and dyeing softener, demulsification temperature of emulsion is high, polyether consumption is less, and total production cost can be reduced. The polyether amine prepared by the preparation method is high in amino terminating ratio, equimolar consumption of a main system is reduced, system viscosity is increased, and produced textiles are integrally softer in hand feeling. Besides, the preparation method is less in reaction by-products, loose in reaction condition, low in equipment requirements and small in equipment investment.

The invention relates to a biogas slurry concentration and nutrient enrichment system for a large biogas project and an application method thereof. The system is mainly composed of a biogas slurry pretreatment device, a sand filtration device, an ultrafiltration device, a nanofiltration device, a reverse osmosis device, a low-temperature multiple-effect evaporation device, a sludge thickening tank, a screw pump, a horizontal centrifugation machine, concentration tanks and a slurry storage tank through connection. The application method of the system comprises the steps that biogas residues and biogas slurry produced from the large biogas project firstly pass through the pretreatment device to remove suspended matter in the biogas slurry, coarse filtration is performed through the sand filtration device, the biogas slurry passes through the two-stage ultrafiltration device respectively to obtain penetrated liquid and concentrated liquid, the penetrated liquid obtained after ultrafiltration passes through the nanofiltration device to obtain ionic liquid and concentrated liquid, then the biogas slurry concentrated liquid passes through the low-temperature multiple-effect evaporation device to obtain high-concentration biogas slurry concentration liquid. The costs for capital construction and equipment investment is effectively reduced, the area occupied by equipment is decreased, the equipment utilization rate is improved, the temperature requirement in the biogas slurry concentration process is low, energy is saved, the biogas slurry concentration and nutrient enrichment system is environmentally friendly, turns waste into wealth and is remarkable in application effect.

The invention relates to a method for preparing aluminum gel, which comprises: (1), using diaspore powder as material, via mol ratio of aluminum and water is 1:20-50, adding into deionized water, mixing, dispersing; (2), via mol ratio between hydrogen ion and aluminum ion is 1:1-20, adding inorganic acid, mixing, dissolving in normal temperature to form semi-transparent gel; (3), mixing for 2-5hours, to form stable product. When in application, adds needed catalyst into said aluminum gel to form slurry, to coat it on the metal beehive or ceramic beehive surface, baking at 500-800Deg. C for 3-5h, and fixing the catalyst on the carrier via aluminum gel; washing it with alcohol solution for 10min via ultrasonic wave at 100Hz, its carrier fall ratio is lower than 5%.

The invention relates to a bentonite composite material for treating high-zinc and copper cyaniding wastewater and application of the bentonite composite material, and belongs to the technical field of wastewater treatment.The preparation method of the bentonite composite material comprises the following steps: mixing butyl titanate, absolute ethyl alcohol and concentrated nitric acid to obtain a mixture A; dissolving lanthanum nitrate hexahydrate in deionized water, adding the concentrated nitric acid, and then adding the absolute ethyl alcohol to obtain a mixture B; dropwise adding the mixture B in the mixture A to obtain a mixture C, and after dropwise adding is finished, continuing stirring to obtain milky liquid; adding bentonite and the deionized water in the milky liquid to obtain a mixture D; and settling, evaporating to dryness, grinding, sieving, roasting, and cooling to room temperature to obtain the bentonite composite material.The titanium dioxide is generated in a reaction process, the generated titanium dioxide is loaded on the bentonite, high-zinc and copper cyaniding wastewater in the gold industry is treated through modification, cyanogens in the cyanide-containing wastewater can be degraded and heavy metal ions are effectively adsorbed.

The invention relates to a metal material with the modified surface and a preparation method and application thereof. The metal material with the modified surface comprises a metal material matrix andan oxidation film which is formed on the surface of the matrix in an in-situ manner and provided with a nanometer topological structure. According to the preparation method of the metal material, themetal material and an acid solution are mixed and then subjected to a hydrothermal reaction, and thus the metal oxidation film provided with the nanometer topological structure is formed on the surface of the metal material in an in-situ manner. By means of formation of the oxidation film, biocompatibility of the material can be improved remarkably, and the material has a good tissue growth induction ability and good antibacterial performance. The oxidation film is formed on the metal matrix in an in-situ manner, an obvious interface between the oxidation film and the matrix material is avoided, the risk that the oxidation film falls off from the matrix is reduced greatly, bonding strength between a decorating layer and a substrate material is ensured, and the application range of the metal material is enlarged.

The present invention relates to a two-component transparent fireproof coating material preparation method, which specifically comprises that a polyglycol-grafted polyphosphate is prepared from polyphosphoric acid, pentaerythritol and polyethylene glycol through a solution synthesis method, an aqueous solution or absolute alcohol solution having a certain concentration is prepared from the polyglycol-grafted polyphosphate, and the obtained aqueous solution or absolute alcohol solution and an aqueous amino resin are subjected to blending stirring to obtain the two-component transparent facing fireproof coating material. According to the present invention, the preparation method is simple and feasible, and has the low in cost, and with the prepared two-component transparent facing fireproof coating material, the flexibility of the coating film is substantially improved on the basis of assurance of the excellent fire resistance of the coating material.

The invention discloses a production method for zinc undecylenate. The production method comprises the following steps: adding glacial acetic acid and zinc oxide into purified water, thereby preparing a zinc acetate aqueous solution; dropwise adding an undecylenate ethanol solution into the zinc acetate aqueous solution; heating, keeping the temperature at 40-80 DEG C, and reacting for 1-2 hours; and filtering, washing, crushing and drying, thereby obtaining a white or light yellow powder zinc undecylenate product.

The invention relates to the field of citric acid production, and particularly provides a method for preparing gypsum whiskers from calcium hydrogen citrate; the method comprises that calcium hydrogen citrate in a citric acid production process is used as a raw material and undergoes a reaction with concentrated sulfuric acid, and the gypsum whiskers are prepared while citric acid is obtained; the method mainly comprises the steps: carrying out a reaction of a calcium hydrogen citrate slurry with sulfuric acid in a citric acid solution with the pressure of 1-2 kg for 80-600 minutes, to obtain the gypsum whiskers; and filtering with a belt type filter, refining and purifying the filtrate to obtain the citric acid product, and after the filter cake is dried, drying at the temperature of 80-100 DEG C, to obtain the gypsum whiskers with the whisker length of 50-400 microns, the diameter of 1-4 microns and the diameter ratio of 20-100. The gypsum whiskers are generated through the hydrothermal method in a medium having a large amount of citric acid, the reaction conditions are loose, the whisker quality is obviously improved, and moreover, the production cost of the gypsum whiskers is greatly reduced.

The invention discloses a device and method for utilizing plasmas for separating out carbon disulphate by-product hydrogen sulfide. The device comprises a reaction tank, a plasma generator, a boosterfan, a conveyor belt, a first motor, a smashing assembly, a sulfur melting tank, a pressure swing adsorption cavity, a connecting pipe and an exhaust assembly. The plasma generator is installed insidethe reaction tank, the booster fan is installed at the bottom end of the plasma generator, the conveyor belt is arranged at one side of the reaction tank, the sulfur melting tank is arranged at one end of the conveyor belt, and the smashing assembly is arranged at the joint of the conveyor belt and the top end of the sulfur melting tank. The device and method for utilizing plasmas for separatingout the carbon disulphate by-product hydrogen sulfide have the advantages of being recyclable and high in separating efficiency, and the high using effectiveness and high usability are improved.