Catalyst for synthesizing 1,2,3,3,4,4-hexafluorocyclobutene, and preparation method and application of catalyst
A ‐hexafluorocyclobutene and catalyst technology, which is applied in the direction of molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of high reaction temperature, affecting the service life of catalysts, etc., and achieve simple preparation process and target The effect of high product selectivity and moderate reaction temperature
Active Publication Date: 2018-11-30
泉州宇极新材料科技有限公司
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Problems solved by technology
Although these synthesis techniques can obtain higher target product yields, the overall reaction temperature is higher, and the polymer by-products produced by the high temperature may affect the service life of the catalyst, so it is necessary to develop a new catalyst to solve the problem of existing processes. existing problems
Method used
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Embodiment 1
[0024] Embodiment 1 (sample 1)
[0025] Weigh Ce(NO 3 ) 3 Powder, add distilled water to prepare impregnation solution, after all the metal salts are completely dissolved, add a certain amount of 5A molecular sieve, and stand for 12 hours for impregnation. Filter the impregnated catalyst, dry at 80°C for 12 hours, and roast at 300°C for 12 hours, and set aside;
Embodiment 2
[0026] Embodiment 2 (sample 2)
[0027] Weigh Ce(NO 3 ) 3 , Ni(NO 3 ) 2 Powder, add distilled water to prepare impregnation solution, after all the metal salts are completely dissolved, add a certain amount of 4A molecular sieve, and stand for 24 hours for impregnation. Filter the impregnated catalyst, dry at 100°C for 24 hours, and roast at 350°C for 24 hours, and set aside;
Embodiment 3
[0028] Embodiment 3 (sample 3)
[0029] Weigh Cu(NO 3 ) 2 Powder, add distilled water to prepare impregnation solution, after all the metal salts are completely dissolved, add a certain amount of 10x molecular sieve, and let it stand for 12 hours. Filter the impregnated catalyst, dry at 120°C for 12h, and roast at 300°C for 24h, and set aside;
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The invention relates to a catalyst for synthesizing 1,2,3,3,4,4-hexafluorocyclobutene, and a preparation method and application of the catalyst. According to the catalyst provided by the invention, one or more selected from alkali metal salts, transition metal salts and rare earth metal salts are taken as active components, an impregnation liquid is prepared according to a certain proportion, a catalyst carrier is added after dissolution is completed, and standing is carried out for impregnation for 12-24 hours. The impregnated catalyst is filtered, drying is carried out at a temperature of 80-250 DEG C for 12-36 hours, and calcination is carried out at a temperature of 300-450 DEG C for 12-36 hours, so that the isomerization catalyst is obtained. The isomerization catalyst provided by the invention is especially suitable for a reaction for preparing 1,2,3,3,4,4-hexafluorocyclobutene through the isomerization of hexafluoro-1,3-butadiene, and has the advantages of mild reaction conditions, no generation of high polymers, and high yield of target products. The preparation method of the isomerization catalyst provided by the invention is simple and has high reaction activity and highselectivity.
Description
technical field [0001] The invention relates to a catalyst, in particular to a catalyst, its preparation method and its application in gas phase reaction preparation of 1,2,3,3,4,4-hexafluorocyclobutene. Background technique [0002] 1,2,3,3,4,4-Hexafluorocyclobutene is a widely used fluorine-containing olefin compound, which is mainly used in the fields of blowing agent, refrigerant, gas etching, and synthesis of fluorine-containing fine chemicals. Since its molecular structure does not contain chlorine atoms, the ozone depletion potential (ODP) of hexafluorocyclobutene is zero, and its global warming potential (GWP) is 119, and its atmospheric lifetime is 1.02a, making it an ideal HCFC , One of the substitutes for HFC compounds. [0003] There are three main synthetic routes of 1,2,3,3,4,4-hexafluorocyclobutene: 1) using hexachloro-1,3-butadiene as raw material. This method is mainly carried out by liquid phase method. Firstly, the raw materials are subjected to fluorine...
Claims
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IPC IPC(8): B01J29/14B01J29/70B01J29/76C07C17/358C07C23/06
CPCB01J29/143B01J29/146B01J29/7053B01J29/7607C07C17/358C07C2601/04C07C23/06
Inventor 庆飞要董利张文妮李忠权恒道
Owner 泉州宇极新材料科技有限公司