摘要:
Mixtures of halocarbons which contain fluorine and chlorine and/or bromine (e.g. a mixture of CCl.sub.2 FCF.sub.3 with CClF.sub.2 CF.sub.3, CCl.sub.2 F.sub.2, CClF.sub.2 CClF.sub.2 or CHClF.sub.2) are contacted with hydrogen in the presence of silicon carbide and/or a metal selected from aluminum, molybdenum, titanium, nickel, iron or cobalt (or their alloys) at temperatures of 350.degree. to 700.degree. C. and pressures of 0 to 1000 psig to obtain a product mixture which substantially corresponds in terms of the distribution of fluorine substituents on carbon atoms with the mixture of halocarbon starting materials.
摘要:
Catalytic hydrogenolysis of fluorohalocarbons (e.g., CFCs) and fluorohalohydrocarbons (e.g., HCFCs), using catalysts of Re, Co, Ni, Ru, Rh, Pd, Os, Ir, and/or Pt on a carbon having low ash content. Preferred catalysts use carbon which is acid-washed, first with an acid other than hydrofluoric acid and then with hydrofluoric acid; and also have a low content of phosphorus, sulfur, potassium, sodium and iron.
摘要:
This invention provides a process for the regeneration and/or activation of a noble catalyst comprising contacting said catalyst with an atmosphere comprising a fluorohalocarbon and/or a fluorohydrocarbon of the formula, C.sub.n H.sub.m F.sub.p X.sub.q, wherein X is chlorine and/or bromine; n is an integer from 1 to 6; m is an integer from 0 to 6, provided that m can be no more than the total n in the compound; p and q are integers from 1-13 when the compound is acrylic and integers from 1-11 when the compound is cyclic, provided that the fluorohalocarbon and/or fluorohalohydrocarbon always contain at least one chlorine or bromine atom and provided that m+p+q=2n+2 when the compound is acrylic and that m+p+q=2n when the compound is cyclic, at a temperature in excess of 200.degree. C.
摘要翻译:本发明提供了一种用于再生和/或活化贵金属催化剂的方法,包括使所述催化剂与包含氟卤烃和/或下式的氟代烃的气氛CnHmFpXq接触,其中X是氯和/或溴; n是1至6的整数; m是0至6的整数,条件是m不能超过化合物中的总数n; 当化合物为丙烯酸时,p和q为1-13的整数,当化合物为环状时,该化合物为1-11的整数,条件是氟代卤代烃和/或氟代卤代烃总是含有至少一个氯或溴原子,条件是m + p + 当化合物为丙烯酸时,q = 2n + 2,当化合物为环状时,m + p + q = 2n,温度超过200℃。
摘要:
A halocarbon product made from the reaction of excess hydrogen fluoride with a halocarbon, containing excess hydrogen fluoride as an azeotrope is purified by fluorination in the presence of additional halocarbon or halo-olefin.