摘要:
1,1,1-trifluoro-2-fluoroethane (CFC 134a) is purified from 1,1-difluoro-2-chloroethylene (CFC 1122) by reacting a mixture comprising said compounds with hydrofluoric acid, at temperatures from 200.degree. C. to 450.degree. C., in the presence of chrome oxide (Cr.sub.2 O.sub.3) in substantially crystalline form.
摘要翻译:通过使包含所述化合物的混合物与氢氟酸在200℃至200℃的温度下反应,从1,1-二氟-2-氯乙烯(CFC 1122)中纯化1,1,1-三氟-2-氟乙烷(CFC 134a)至 450℃,在基本上呈结晶形式的氧化铬(Cr 2 O 3)存在下进行。
摘要:
The 1,1,2-trifluoro-1,2-dichloroethane content is reduced or removed from 1,1,1-trifluoro-2,2-dichloroethane by contacting a gaseous mixture comprising said compounds with chrome oxide (Cr.sub.2 O.sub.3) either as such or supported, at temperatures from 180.degree. to 400.degree. C.
摘要翻译:通过使包含所述化合物的气体混合物与氧化铬(Cr 2 O 3)接触,将1,1,2-三氟-1,2-二氯乙烷含量从1,1,1-三氟-2,2-二氯乙烷中还原或除去 或在180°至400℃的温度下负载
摘要:
1,1,2-trifluoro-1,2-dichloroethane (Al23a) is isomerized to 1,1,1-tri-fluoro-2,2-dichloroethane (Al23) by contacting it with AlF.sub.3 at temperatures ranging from 180.degree. to 400.degree. C. Advantageously, it is operated with mixtures of Al23a with Al23 and/or other chlorofluorocarbons coming from the preparation of Al23 by hydrofluorination of perchloroethylene.
摘要:
1,1,1-trifluoro-2-fluoroethane (CFC 134a) is purified from 1,1-difluoro-2-chloroethylene (CFC 1122) by reacting a mixture comprising said compounds with hydrofluoric acid, at temperatures from 200.degree. C. to 450.degree. C., in one presence of chrome oxide (Cr.sub.2 O.sub.3) in substantially crystalline form.
摘要翻译:通过使包含所述化合物的混合物与氢氟酸在200℃至200℃的温度下反应,从1,1-二氟-2-氯乙烯(CFC 1122)中纯化1,1,1-三氟-2-氟乙烷(CFC 134a)至 在一定程度上存在基本上结晶形式的氧化铬(Cr 2 O 3)。
摘要:
A process for obtaining pentafluoroethane HFC 125 by dismutation of gaseous tetrafluorochloroethane HCFC 124, at temperatures in the range 200°-300° C., on a trivalent chromium oxide (Cr2O3) catalyst, supported on aluminum fluoride, by feeding HF in such amount that the HCFC 124/HF molar ratio is in the range 10/1-1/1.
摘要:
Perfluoropropene (PFP) hydrofluorination process in gaseous phase to obtain CF3—CHF—CF3 (A-227ea), characterized in that as catalyst fluorinated alumina containing at least 90% by weight of AlF3, is used, the HF/PFP molar ratios range from about 4:1 to 20:1, the hydrofluorination process temperature being in the range 320°-420° C.
摘要:
A fluorination catalyst based on of an amorphous Cr (III) compound and on a compound of another metal selected from Mg, Ca, Sr, Ba, Sc, Ti and Zr, wherein the atomic ratio of Cr/other metal is between 50:1 and 1:1, said compounds are supported on a AlF.sub.3 support and being prepared by impregnating the support with a concentrated aqueous solution containing a soluble Cr (III) salt and a soluble salt of the other metal. The catalyst can be used in gaseous phase reactions.
摘要:
Process for the regeneration of a fluorination catalyst based on Cr(III) compounds optionallay supported comprising a) the treatment at 350.degree. C.-400.degree. C. with an air/inert gas mixture and b) treatment at 300.degree. C.-380.degree. C. with a mixture of an inert gas containing from 1 to 10% by volume of hydrogen.
摘要:
A process in gaseous phase to obtain CFC 113a starting from CFC 113, wherein CFC 113, optionally diluted with a gas inert under the reaction conditions, is let flow on a catalyst formed by aluminum fluoride.
摘要:
Fluorination process of halogenated organic compounds with gaseous anhydrous HF characterized in that a catalyst comprising a supported Cr(III) amorphous compound is used, wherein the support consists in an aluminum trifluoride (AlF.sub.3) having an high surface area and an high pore volume obtainable by fluorination with gaseous HF of alumina having surface area of at least 150 m.sup.2 /g and pore volume not lower than 0.3 cc/g and wherein said alumina comprises from 0.5 up to 15% by weight of silicon oxide, the chromium amount being comprised between 1 and 20% by weight.