347results about How to "Simple separation process" patented technology

The invention discloses a treatment method for waste of a positive electrode material of a lithium battery. The method comprises the steps of (A) roasting; (B) acidifying and leaching; (C) iron and aluminum removal; (D) copper and zinc removal; (E) fluorinating lithium deposition; (F) calcium and magnesium removal; (G) multi-stage extraction; and (H) oil removal. According to the treatment method for the waste of the positive electrode material of the lithium battery, multiple valuable metals of lithium, cobalt, manganese, nickel and the like contained in the positive electrode material of the lithium battery can be comprehensively recovered; the treatment method has the advantages that the metal recovery rate is high, the obtained lithium product is good in quality and the treatment method is friendly to environment, low in production cost and suitable for industrial production.

A method of separation of the dissociative monomer in the polyamido ester solidifying agent, incldues the following steps: (1) get rid of the solvent in the solidifying agent; (2) add the extracting agent and the extractive smuggling agent to the solidifying agent, then make the molecular distillation and the distilled leaving is the solidifying agent; (3) dilute the solidifying agnet; compared with the chemical-reaction method and the vacuum-distilling method, this method can reduce the content of the dissociative monomer in the polyamido ester, at the same time it can't augment the relative molecular weight and the distribution of the relative molecular weight, and reduce the compatibility of the solidifying agent with the hydroxy ester; and the gained solid content can be optionally adjusted and even reach the weight of 80-100 % of the high solid content.

The invention provides a terminal-hyperbranched polyether phosphate water reducing agent which has one or more polyether long side chains. All phosphate adsorption groups are centrally arranged on one end of each polyether long side chain. The terminal-hyperbranched polyether phosphate water reducing agent has the advantages of excellent slump retaining properties, excellent setting retardancy, excellent clay tolerance and simple preparation technique.

The invention discloses a method for making methyl acetate through carbonylation of dimethyl ether and the modified molecular sieve catalyst and modification method thereof. The modification method is to pass the modified substance that is diluted by the diluent gas through the reactor filled with hydrogen type zeolite molecular sieve catalyst at an adsorbent temperature of 100-400 oC under normal pressure condition, so that the modified substance can have chemisorption on the hydrogen type zeolite molecular sieve catalyst to obtain modified molecular sieve catalyst; the modified substance can be liquid modified substance and / or gaseous modified substance. The modified molecular sieve catalyst can be obtained by using the modification method in which the modified molecular sieve catalyst for making methyl acetate through carbonylation of dimethyl ether can be obtained. The method for making methyl acetate through carbonylation of dimethyl ether is to pass the raw gas consisting of dimethyl ether, carbon monoxide and hydrogen through the reactor filled with the modified molecular sieve catalyst for reaction to obtain the methyl acetate. Through the modification of hydrogen type zeolite molecular sieve catalyst by the modified substance, the method can effectively inhibit the side-reaction of carbon deposit and greatly prolong the service life.

The invention discloses a process for separating and purifying a gamma-aminobutyric acid, which aims to effectively solve the problems of complex separation and purification steps and high industrial cost which are caused by complex components of fermentation liquor in the biological preparation of the gamma-aminobutyric acid. In the process, impurities in conversion liquor are reduced by adopting a bioconversion method to simplify a separation process, and the conversion liquor is simply decolored to obtain the gamma-aminobutyric acid with high purity and recovery rate. The process has the advantages of simple method and high recovery rate of products, and is suitable for large-scale industrial production.

The invention relates to a process for separate production or joint production of ethanol and acetic ether through acetic acid indirect hydrogenation. Acetic acid and ethanol are placed in an esterification tower, the acetic acid and the ethanol are subjected to reactive distillation in the presence of acid catalysts, the acetic ether and water are obtained, the mixture is distilled off from the top of the tower and enters a water segregator, a rectification light removal tower and a rectification heavy removal tower after being condensed, so that impurities are removed and conforming products of the acetic ether are obtained. Part of the products are sold, and others are regarded as raw materials for producing the ethanol in a hydrogenolysis reaction, led to a hydrogenolysis tower and subjected to catalytic hydrogenolysis so as to selectively obtain the ethanol. Part of or all the ethanol obtained by hydrogenolysis of the acetic ether is regarded as a raw material for an esterification reaction and reacts with the acetic acid in the esterification tower. Compared with the existing technologies, the process is simple in flow and low in production cost; and either the ethanol or the acetic ether can be produced selectively, or both the ethanol and the acetic ether can be produced in a certain proportion through adjustment of the production capacity of a hydrogenolysis and hydrogen production device.

The invention relates to the separation and extraction methods of a sweet tea polyphenols. The invention uses integration of ultrafiltration with resin adsorption separation technique. Only ethanol is used as organic solvent during producing process and the separation technique of sweet tea polyphenols is optimized; the simple operation helps realize industrialized production; besides, the production process accords with environment protection requirement and the products accord with food and drug raw material requirements. The invention uses Guangxi sweet tea as raw materials to produce sweet tea polyphenols containing over 50% and 90%. Hyaluronidase inhibition in vitro experiment, in vivo experiments of mice passive dermato-allergic reaction and the delayed cutaneous hypersensitivity caused by dinitro-chlorobenzene confirm the invention has significant anti-anaphylaxis activity.

The invention belongs to the field of synthesis of fine chemicals, and discloses a method for preparing 1,6-adipaldehyde. The method comprises the following steps of: performing an ozonization reaction on cyclohexene serving as a raw material by taking ozone as an oxidant and taking an organic solvent and glacial acetic acid as mixed solvents at the reaction temperature of between 20 DEG C below zero and 10 DEG C to obtain an ozonized reaction liquid, and directly performing a reducing reaction on an ozonide without separating; and reducing and decomposing by adopting zinc powder, and reacting under the protection of nitrogen gas at the room temperature for 0.5-1.5 hours to obtain 1,6-adipaldehyde. Compared with the conventional method, the method has the advantages: ozone is taken as an oxidant, so that high oxidizing capacity and high selectivity are realized, the environmental pollution is low, the requirement of ozonization reaction temperature is low, energy is saved, and consumption is lowered. After reacting, a product is easy and convenient to separate; and zinc acetate is recovered from a water phase by concentrating and crystalizing, so that production cost is lowered, and industrial production is facilitated.

The invention discloses a potassium chloride and ammonium nitrate double decomposition and circulation method for producing high quality potassium nitrate. According to the method, potassium chloride and ammonium nitrate are taken as the raw materials, and the method comprises steps of raw material preparation, potassium nitrate crystallization, foam floatation and separation, potassium nitrate refinement, and ammonium chloride crystallization. The method is developed on the basis of conventional potassium nitrate production technology by improving part of the technology; wherein in the foam flotation and separation technology, in the presence of a floatation reagent (C12-C20 higher straight-chain aliphatic amine) and in a certain pH value range, the ammonium chloride and coarse potassium nitrate can be separated through foam entrainment; in the potassium nitrate refinement, the refined potassium mother liquid in the previous circulation is used to wash the coarse potassium nitrate, and then potassium nitrate is purified by sodium carbonate. In one aspect, the conventional potassium nitrate production technology is optimized, the potassium nitrate quality is improved, and the impurity content of the potassium nitrate product is greatly reduced. In the other aspect, the water using amount is reduced, the labor intensity is also reduced, and the production cost is saved. The industrial grade KNO3 mass content is not less than 99.7%, the content of Cl<-> is not more than 0.01%, and the content of NH4<+> is not more than 0.03%. the method has a wide application value and can generate prominent social benefit and economic benefit.