8 results about "Fluorochemical industry" patented technology

The invention discloses an ultra-high molecular weight polyvinylidene fluoride-based polymer and a preparation method thereof, and belongs to the technical field of fluorine chemical industry. An emulsifier (a series of anionic fluorinated surfactants such as perfluoroalkyl carboxylic acid and salt thereof, perfluoroalkyl sulfonic acid and salt thereof, perfluoroalkyl polyether fluorocarbonic acid and salt thereof) used for fluorine-containing olefin emulsion polymerization is used as a protecting group for generating metal nanoparticles through in-situ reduction; in the emulsion polymerization reaction process, a silver salt precursor is subjected to in-situ reduction to synthesize silver nanoparticles, and then the silver nanoparticles interact with an initiator to initiate fluorine-containing olefin monomer polymerization. Through in-situ reduction, the problem that the efficiency of catalytic initiation polymerization reaction is reduced due to the fact that monodisperse metal nanoparticles are prone to aggregation for a long time is solved.

The invention belongs to the technical field of industrial solid waste recycling and molecular sieve materials, and particularly discloses a method for synthesizing MOR zeolite. The fluorine-containing silicon slag generated in the fluorine chemical industry is converted into the high-performance MOR zeolite aiming at the dual problems that the traditional zeolite synthesis raw material cost is high and the fluorine-containing industrial waste slag is difficult to treat. The specific method comprises the following steps: mixing fluorine-containing silicon slag with an alkaline solution to obtain aluminosilicate gel; mixing the aluminosilicate gel with a sodium source, performing aging, and then performing crystallization reaction to obtain MOR zeolite; wherein the fluorine-containing silicon slag is waste slag generated in the production process of anhydrous hydrogen fluoride; the alkaline solution is a solution obtained by dissolving sodium metaaluminate in deionized water; the sodium source is sodium hydroxide. According to the invention, the coupling of hazardous waste recycling and high-value material preparation is realized, the process flow is simple, the preparation cost is low, and the synthesized MOR zeolite is suitable for reactions such as catalytic cracking, isomerization, dimethyl ether carbonylation and the like and adsorption of heavy metals and harmful gases.

This invention relates to the field of industrial process management and optimization scheduling technology, and particularly to a method for tracking and optimizing carbon emission flows in a multi-product co-production process in the fluorochemical industry. First, a directed graph model of the product chain with process units as vertices is constructed. A multi-dimensional carbon emission flow calculation model is established, including direct carbon flows from fuel combustion, indirect carbon flows from purchased electricity and heat, direct carbon flows from the process itself, and carbon flows from the emission of fluorinated greenhouse gases. A dynamic evolution algorithm for node carbon potential and an iterative algorithm for reverse tracing of branch carbon flows are employed to achieve accurate tracking of spatiotemporally coupled carbon flows throughout the entire process. Using the time-varying carbon intensity coefficient as the core parameter, a dual-objective optimization scheduling model is established to minimize both total system carbon emissions and overall operating costs. An adaptive penalty mechanism with carbon constraints is introduced to solve for the optimal scheduling scheme, constructing a rolling optimization closed-loop control link for the production process. This invention effectively solves the problems of calculating carbon flows from the emission of fluorinated gases and allocating carbon flows among multiple products in the fluorochemical industry, achieving a synergistic improvement in carbon emission reduction and economic benefits.

The present invention belongs to the field of fluorochemical industry, and particularly relates to a catalyst, a preparation method thereof and an application thereof in the preparation of heptafluoroisobutanol. The catalyst comprises a hydrogenation metal oxide and a stabilizing metal oxide; the hydrogenation metal oxide is one or at least two mixtures of oxides of Cu, Zn, Ni, Fe, and Cr; the stabilizing metal is one or at least two mixtures of oxides of Ba, Ca, Mg, Cd, and Pb; the catalyst prepared by the present invention can effectively improve the conversion rate and selectivity. By optimizing the conditions, the product has high purity and yield. This enables the product to be produced on a large scale, and it is inexpensive and easy to promote.

The present invention belongs to the technical field of fluorochemical industry, and particularly relates to a synthesis method of hexafluoroisopropanol. The synthesis method of hexafluoroisopropanol described in the present invention is as follows: First, 1,1,1-trifluoro-2-propanol is mixed with a solvent, and a catalyst is added with stirring. The temperature is raised to 65-75 °C, and then hexafluoroacetone gas is added at a rate of 45-75 g / min. After the addition is completed, the mixture is stirred and kept warm for reaction for 1-2 h. After the reaction is completed, a reaction solution is obtained. Finally, through rectification, the target product hexafluoroisopropanol is obtained. The molar ratio of the hexafluoroacetone to the 1,1,1-trifluoro-2-propanol is 1:1.05-1.12. The catalyst is aluminum tert-butoxide or aluminum isopropoxide. The synthesis method of hexafluoroisopropanol provided by the present invention has simple process operation and high safety. The reaction conditions are mild, the product has high purity, the target product is continuously withdrawn, the conversion rate of the reaction is high, the reaction activity is good, and the reaction efficiency is high.

The present invention belongs to the technical field of chemical equipment, and particularly relates to a mixer reactor for the fluorochemical industry. Aiming at the problems of high energy consumption and unsatisfactory production efficiency in the existing production methods, the present invention provides a mixer reactor for the fluorochemical industry, which includes a mounting base. A reaction system and a power system are provided on the mounting base. One end of the main shaft away from the power system extends into the reaction system. A sealing structure is also provided between the power system and the reaction system. The sealing structure is sleeved outside the main shaft. A degassing system is further provided on the side of the reaction system away from the power system. The degassing system is connected and communicated with the reaction system. The present invention adopts a structure in which the power system, the reaction system, the degassing system, etc. are connected in sequence, and has lower energy consumption and higher production efficiency compared with the reaction method using a stirring reaction kettle in the prior art.

The invention relates to a PPVE (perfluoromethyl vinyl ether) tail gas recovery system, in particular to a recovery system for removing CO2 and N2 in PPVE tail gas by adopting a molecular sieve membrane matched with a condensation technology, and belongs to the field of gas treatment. According to the method, membrane separation and condensation processes are ingeniously coupled, CO2 and N2 in the PPVE tail gas can be effectively removed through efficient separation of the molecular sieve membrane on the tail gas and condensation separation of the condenser, the purity of PPVE is increased to 99.4%, and the recovery rate reaches up to 97.9%. Meanwhile, the membrane separation technology has the characteristics of high efficiency and energy conservation, a large amount of phase change energy consumption in a traditional method is avoided, the production cost is greatly reduced, the resource utilization rate is increased, and powerful support is provided for green and sustainable development of the fluorine chemical industry.

The present invention belongs to the technical field of fluorochemical industry, and specifically relates to a spinel-type composite oxide catalyst and a preparation method thereof. The general formula of the catalyst is AB2O4, and its preparation method includes: (1) mixing the raw materials at the A-site and the B-site, dissolving them in deionized water, adding citric acid monohydrate, and mixing and stirring to obtain a sol; (2) evaporating the sol to obtain a dry gel, then drying the dry gel, subsequently performing pretreatment on the dried dry gel, and performing calcination after pretreatment to obtain a spinel-type composite oxide catalyst; (3) placing the spinel-type composite oxide catalyst in a fixed-bed reactor, and simultaneously introducing N2 and HF for fluorination treatment. By using adjustable ion types and ratios at the A-site and the B-site to optimize the surface structure and active sites of the catalyst, combined with the citric acid-assisted sol-gel method and specific pretreatment, calcination, and fluorination treatment processes, the stability, catalytic activity, and selectivity of the catalyst are significantly improved.