70results about How to "Production safety and environmental protection" patented technology

The invention discloses a reinforcing agent of amphoteric polyacrylamide cardboard paper. In the existing reinforcing agents, some have unobvious reinforcing effect, and some have extremely great pollution and damage to the environment. The reinforcing agent is prepared by deionized water, anion monomer, cation monomer, non-ion monomer, pH adjusting agent and an initiating system, and is characterized in that: the anion monomer selects the mixture of carboxylic group unsaturated monomer and sulfonic group unsaturated monomer for use; and the non-ion monomer selects the mixture of acrylamide or acrylamide derivative and methyl methacrylate or methyl methacrylate derivative for use. The reinforcing agent has favorable reinforcing effect and greatly improves the safety and environment protection of production.

The invention relates to a high-efficient zinc-rich anti-corrosive paint and a preparation method thereof. Components of the paint according to parts by weight are as below: 2.0-2.6 parts of ethylene resin, 75.0-86.0 parts of zinc powder, 11.0-24.0 parts of solvent and 0.1-0.5 part of addition agent. The invention is characterized in that the ordinary active zinc powder is used; zinc content in a dried film is greater than 96.5 percent so as to solve a present technical problem that only the use of high-purity zinc powder can lead to the zinc content of 96 percent in the dried film. A high-efficient zinc-rich anti-corrosive paint coating has excellent physical and mechanical performance and excellent anti-corrosive performance, and no red rust is generated during a 6000h neutral salt spray test. The surface of the coating can be used together with anti-corrosive finish paint of various types, and the requirement of various long-term heavy anti-corrosion constructions can be satisfied; the paint system is of single component which can be used at the temperature of -25 DEG C-80 DEG C; the construction is convenient, and the range of use environment temperature is wide; and the invention has good antistatic performance and can be used for an antistatic coating.

The invention discloses a method for extracting proanthocyanidin from pine bark by taking water as solvent. The method takes the pine bark as raw material and water as extraction solvent, utilizes ultrasonic wave technology for enhanced extraction to obtain proanthocyanidin leach liquor, uses the membrane separation technology of microfiltration for removing impurities, ultrafiltration purification and nanofiltration concentration for processing to obtain concentrated proanthocyanidin liquid, and finally obtains the proanthocyanidin product by vacuum or freeze drying. The method only takes the water as the extraction solvent, and utilizes the ultrasonic wave extraction technology and the membrane separation technology, so as to lead the whole technical process to be operated under the low temperature condition, thus not only effectively improving the extraction yield of active ingredients and ensuring bioactive substances not to be damaged, but also being safe and environment-friendly in production and having no residual chemical solvent on the product. Therefore, the proanthocyanidin is a natural and green product in the true sense, and the production method is very environment-friendly.

The invention provides a two-component solvent-free plant oil-based adhesive, which comprises components A and B, wherein component A comprises modified plant oil, tackifying resin, a coupling agent, a filler, microencapsulated microspheres and a chain extender; component B comprises isocyanate or a mixture of isocyanate and modified plant oil. The two-component solvent-free plant oil-based adhesive with high comprehensive performance is safe in use, economical, moderate in curing speed, adjustable in hardness, high in initial cohesiveness, water resistance and heat resistance, strong in adhesive strength, wide in application range, green and environment-friendly.

The invention discloses a liquid calcium/zinc heat stabilizer. The liquid calcium/zinc heat stabilizer comprises, by weight, 10 parts to 15 parts of calcium oxide and/or calcium hydroxide, 10 parts to 20 parts of zinc oxide and/or zinc hydroxide, 30 parts to 40 parts of acid liquor, 1 part to 2 parts of azeotropic agents, 10 parts to 20 parts of saturated cycloparaffin solvents and 10 parts to 20 parts of heat-proof assistants. The invention further discloses a preparing method of the liquid calcium/zinc heat stabilizer and a device for implementing the method. According to the liquid calcium/zinc heat stabilizer, the product performance is stable, floccule can not be separated out during placing, the product is free of pungent smells, and the body of an operator can not be hurt. The preparing method of the liquid calcium/zinc heat stabilizer adopts a one-step method, the production technology is simplified, the unsafe factors in the production process are reduced, the production efficiency is improved, and the output rate is increased.

The invention discloses a production technology of high purity yak serum albumin. The production technology comprises the following steps: adding sodium citrate and sodium chloride into yak blood, separating plasma and erythrocyte, subjecting plasma to centrifugation, filtering and extraction, putting the plasma extract in an interlayer reaction pot, heating the pot, adding sodium caprylate, sodium chloride, and ethanol/methanol, slowing stirring, adding hydrochloric acid for twice to adjust the pH value, carrying out centrifugation, adding a precipitating reagent into the supernate, grinding the supernate into paste, stirring, freezing the paste for a night, carrying out centrifugation, collecting the precipitate, adding water to dissolve precipitate, adjusting the pH value by a sodium hydroxide solution, allowing the solution to stand still for a while, carrying out centrifugation, saving the supernate, filtering the supernate, inactivating the virus, and freeze-drying the supernate to obtain the finished product. The preparation technology is simple, the used materials are few, the technological procedure is short, the operation is easy, the product yield is high, the cost is low, and the product quality is good. The massive and automatic production can be easily realized. Moreover, the product is more reliable and safer.

The invention relates to a preparation method of a slump retaining ether type polycarboxylic water reducing agent. The method includes steps: (1) dissolving 80-100 parts of unsaturated polyether macromonomers into 60-85 parts of water, well stirring, and heating to 50-70 DEG C at a rate of 30-50 DEG C per hour to obtain a mixed solution; (2) keeping the temperature of the mixed solution at 50-70 DEG C, adding 0.5-1 part of an initiator, and well stirring to obtain a mixed solution; (3) keeping the temperature of the mixed solution at 50-70 DEG C while dropwise adding 15-30 parts of unsaturated carboxylic acid and unsaturated carboxylic acid derivative micromonomer solution and 20-30 parts of molecular weight regulator solution, keeping the temperature at 50-70 DEG C for 1-2h after adding is finished, and ageing to obtain a mixed solution; (4) adding 50-80 parts of water into the mixed solution, and dropwise adding sodium hydroxide solution to adjust a pH value to 6-7 to obtain the slump retaining ether type polycarboxylic water reducing agent.

The invention discloses an asynchronous cold rolling forming process of an aluminum alloy stainless steel composite plate. The process comprises the following process steps: 1, rolling and compoundinga stainless steel plate and an aluminum alloy plate in an asynchronous rolling mode, and 2, after asynchronous rolling, diffusing and annealing the composite plate, specifically, in the step 1, online heating is carried out on the opposite surface of the composite plate surface of the stainless steel plate, online cooling is carried out on the opposite surface of the composite plate surface of the aluminum alloy plate online, and the heating temperature is 350 DEG C-850 DEG C; the temperature of the composite plate surface of the stainless steel plate from which the composite plate is rolledis lower than 650 DEG C, and the temperature of the composite plate surface of the aluminum alloy plate from which the composite plate is rolled is lower than 300 DEG C; the rolling reduction rate is20%-90%; the different speed ratio of a roller for asynchronous cold rolling is 1.05-1.50; the thickness ratio of the aluminum alloy plate to the stainless steel plate is 1.5-4.0; and in the step 2, the annealing temperature is 250 DEG C-500 DEG C and the annealing time is 15-120 min. The single-side online heating process for rolling the composite plate is creatively provided so as to improve theinterface bonding strength of the composite plate and realize rolling compounding in an interface semi-melting state.

The invention relates to a method for synthesizing 2-aminothiazoline, which comprises the following steps: firstly, performing chlorinated reaction between ethanolamine and thionyl chloride in an organic solvent to generate 2-chloro-ethylamine hydrochloride; and secondly, performing cyclization reaction between the 2-chloro-ethylamine hydrochloride and thiourea to generate the 2-aminothiazoline. Compared with the prior art, the method does not need introduce hydrogen chloride gas and concentrated hydrochloric acid to synthesize ethanolamine hydrochloride, thereby reducing reaction reagents and the reaction steps; besides, the process route is more advanced, environment-friendly and safer, and the cyclization yield reaches more than 70 percent.

The invention discloses a self-adaption machining system and a control method thereof and car body machining equipment. The self-adaption machining system is used for machining a workpiece and comprises an executing system, a motorized spindle, a milling tool head, a visual detecting device and a control device. The executing mechanism is in transmission connection with the motorized spindle and drives the motorized spindle to move. The motorized spindle drives the milling tool head to move. The executing mechanism and the motorized spindle are in communication connection with the control device, and the control device comprises a memorizer storing preliminary machining data and waste parameters of the workpiece. The control device carries out operation to obtain intermediate parameters, machining data is further obtained, the control device adjusts a first work parameter and a second work parameter according to post machining data and the waste parameters to control the motion of theexecuting mechanism and the motorized spindle correspondingly, and therefore it is guaranteed that the milling parameters of the milling tool head meet the requirement of the waste parameters. The self-adaption machining system and the control method thereof and the car body machining equipment have the advantages that the automation degree is high, production is safe and environment-friendly, theproduction and labor cost is greatly reduced, and the precision consistency is high.

The invention relates to a preparation method of chlorphenesin carbamate, which comprises the following steps: heating chlorphenesin and reacting the chlorphenesin with diethyl carbonate under the action of less ester exchange catalyst; adding tertiary butanol and dimethyl formamide to be used as mixed solvent after the reaction is finished, reacting the mixture with ammonia water to prepare a target object, filtering, and washing by using pure water containing less ammonia; and refining by using ethanol containing less ammonia and ethyl acetate as mixed solvent to obtain the chlorphenesin carbamate of raw material medicine. The used solvents have lower toxicity and hazard, the refining method is special and comprises the steps of washing by the pure water containing less ammonia to remove most of impurities and refining by taking ethanol with less ammonia and the ethyl acetate as the mixture, thereby leading the product not to nearly contain toxic and hazardous organic solvent and optimizing the production environment.

The invention discloses a comprehensive treatment method for harmless recycling of pickling sludge and pickling waste liquid. The comprehensive treatment method comprises the following steps: (1) mixing the pickling sludge with the pickling waste liquid, and successively carrying out a reaction and filtering so as to obtain a filter cake and a filtrate; (2) adding waste scrap iron into the filtrate, and then carrying out filtering; (3) adding waste iron scraps to a filtrate obtained in the step 2, and successively carrying out a reaction and filtering; (4) adjusting the pH value of a filtrateobtained in the step 3, adding an auxiliary agent, successively carrying out stirring, standing and filtering, and measuring the total Fe concentration of the obtained filtrate; (5) adding water intothe filtrate for dilution so as to obtain a solution I, adjusting the pH value of the solution I, adding an oxidant for oxidation, controlling a pH value and a ratio of Fe<3+> to Fe<2+> in a system, preparing iron black or iron yellow, successively carrying out filtering, drying and grinding so as to obtain iron black or iron yellow powder, and calcining the powder to obtain iron oxide red. A solid obtained in the step (1) is used as a building material, and liquid and solids obtained in the rest steps can be used in the corresponding steps of next treatment. The comprehensive treatment methodof the invention solves technical problems in the treatment of the pickling sludge and the pickling waste liquid, and high economic return is obtained through preparation of the medium-grade and high-grade iron oxide.

An efficient zinc-rich coating added with aluminum powder and a rare earth element is prepared from a dry film and a volatile solvent, wherein the dry film comprises the following components by mass percent: 91-95% of zinc powder, 1-5% of aluminum powder, 0.15-0.62% of rare earth powder, 2.0-6.6% of resin and 1.0-1.42% of auxiliary agent; and the volatile solvent is 10-30% of the total weight of the dry film. The invention further provides a preparation method of the efficient zinc-rich coating. The total content of zinc, aluminum and rare earth in the dry film is above 96% and the zinc content is 91%, so that physical and mechanical properties are excellent, corrosion performance is excellent, and no red rust exists within 4500 hours in a neutral salt spray test; acrylic resin and amino resin is taken as a resin solvent system and butyl acetate is taken as a diluent, so that the efficient zinc-rich coating is very low in toxicity and small in pollution, does not contain benzene, methylbenzene, dimethylbenzene and other undesirable components, and is safe and environment-friendly in production and use; and a product preparing process is simple and easy to operate, easy to implement and promote and wide in application prospect.

The invention discloses a resource recycling method of an iron-containing waste sulfuric acid solution. The method comprises steps as follows: the iron-containing waste sulfuric acid solution is addedto a pretreatment reaction kettle, iron powder and a heavy metal trapping agent are added to the pretreatment reaction kettle for a mixing and stirring reaction, filtration is performed and a reaction liquid is obtained; the reaction liquid is lifted to a crystalizing reaction kettle, industrial sulfuric acid is added to the crystalizing reaction kettle in a certain proportion during cooling, themixture is mixed and stirred, reactive crystallization and filtration are performed, and two products, namely, high-purity ferrous sulfate crystals (solids) and a diluted sulfuric acid solution, areobtained. The method has the benefits as follows: two products, namely, the high-purity ferrous sulfate crystals (solids) and the diluted sulfuric acid solution, are obtained from the iron-containingwaste sulfuric acid solution; the process operation is simple, production is safe and environmentally friendly, the sulfuric acid utilization rate is high, no waste liquids are discharged, and the economic benefits are good. Obtained ferrous sulfate is convenient to store and transport, has very low content of heavy metals, is high in additional value and is used for preparing iron salt, iron oxide pigments, mordants, water purifiers, preservatives, disinfectants and the like.

The invention provides a preparation method of 2,6-dibromo 17a-hydroxyproxyprogesterone. The method includes the steps that 17a-hydroxyproxyprogesterone is reacted with bromine in a first organic solvent and an acid environment to obtain the dibromination product 2,6-dibromo 17a-hydroxyproxyprogesterone by making 2 and 6 sites of a 17a-hydroxyproxyprogesterone molecule subjected to dibromination,wherein a ratio of the 17a-hydroxyproxyprogesterone to the bromine to acid is 1g to (1.2 to 1.8 g) to (0.1 to 0.4 g), and a ratio of the 17a-hydroxyproxyprogesterone to the first organic solvent is 1g to (2 to 15 ml). The invention further provides a preparation method of 1,6-didehydro-17a-hydroxyproxyprogesterone correspondingly. The preparation methods of the 2,6-dibromo 17a-hydroxyproxyprogesterone and the 1,6-didehydro 17a-hydroxyproxyprogesterone have the advantages of simple and convenient process operation, safe and environment-friendly production, low production cost and the like. Compared with traditional production methods, the method has high product yield, good quality, and can reduce the product production cost by 30% to 35%; the solvent used in the process can be recovered and recycled, which is economical and environmentally friendly at the same time, and is very beneficial to industrial production.