摘要:
The current invention relates to a process for making a tetrafluoropropene using a tetrafluorochloropropane and/or a pentafluoropropane as starting or intermediate reagents. More specifically, though not exclusively, the present invention relates to a novel method for preparing a tetrafluoropropene by dehydrohalogenating a starting or intermediate tetrafluorochloropropane and/or pentafluoropropane material in the presence of a caustic solution at a temperature range greater than 40° C. and less than or equal to 80° C.
摘要:
The invention provides an economic process for the manufacture of 1,3,3,3-tetrafluoropropene (HFO-1234ze) by a two stage process. A vapor phase hydrofluorination of 1-chloro-3,3,3-trifluoropropene (HCFC-1233zd) into 1-chloro-1,3,3,3-tetrafluoropropane (HCFC-244fa) and/or 1,1,1,3,3-pentafluoropropane (HFC-245fa) is conducted, followed by the thermal dehydrochlorination of HCFC-244fa and dehydro fluorination of HFC-245fa into HFO-1234ze in the presence of a catalyst which comprises one or more of alkali metal halides, alkaline earth metal halides, halogenated metal oxides, zero oxidation state metals, zinc halides, palladium halides, and activated carbon.
摘要:
Catalyst compositions useful for the generation of CO-free hydrogen from methane, which catalyst compositions can be represented by NixMgyO and NixMgyCuzO. The present invention also relates to a method for preparing the aforesaid catalyst compositions.
摘要:
A composition which is a blowing agent which comprises from about 75% to about 90% by weight trans-1,3,3,3-tetrafluoropropene, from about 1% to about 15% by weight cis-1,3,3,3-tetrafluoropropene, and from about 1% about 15% by weight 1,1,3,3,3-pentafluoropropane.
摘要:
Disclosed is a method for producing fluorinated organic compounds, including hydrofluoropropenes, which preferably comprises converting at least one compound of formula (I): CF3CFnCHmXa-m (I) to at least one compound of formula (II) CF3CZCHZ (II). where each X is independently Cl, I or Br; each Z is independently H or F; n is 1 or 2; m is 1, 2 or 3, provided that when n is 1, m is 1 or 2; a is 2 or 3, and a-m≧0. Certain embodiments include the step of reacting fluorinated C2 olefin, such as tetrafluoroethylene, with a C1 addition agent under conditions effective to produce a compound of formula (I).
摘要翻译:公开了一种制备氟化有机化合物的方法,包括氢氟丙烯,其优选包括将至少一种式(I)化合物:CF 3 CF n CH m X a-m(I)转化为至少一种式(II)CF 3 CZCHZ(II)化合物。 其中每个X独立地为Cl,I或Br; 每个Z独立地为H或F; n为1或2; m为1,2或3,条件是当n为1时,m为1或2; a为2或3,a-m≥0。 某些实施方案包括在有效产生式(I)化合物的条件下使氟化C 2烯烃如四氟乙烯与C1加成剂反应的步骤。
摘要:
Disclosed is a method for forming HFO-1234ze, and for forming compositions comprising HFO-1234ze, by (a) converting, preferably by dehydrofluorination, pentafluorpropane (HFC-245), preferably 1,1,1,3,3-pentafluorpropane (HFC-245fa), preferably by contact with a caustic solution, to a reaction product comprising cis-HFO-1234ze and trans-HFO-1234ze; and (b) contacting at least a portion, preferably substantially portion, and in certain embodiments substantially all of said reaction product with at least one isomerization catalyst to convert at least a portion, and preferably at least a substantial portion, of cis-HFO-1234ze in said reaction product to trans-HFO-1234ze.
摘要:
Catalyst compositions useful for the generation of CO-free hydrogen from methane, which catalyst compositions can be represented by NixMgyO and NixMgyCuzO. The present invention also relates to a method for preparing the aforesaid catalyst compositions.
摘要翻译:可用于从甲烷产生无CO的催化剂组合物,该催化剂组合物可以由Ni x Si x Y O和Ni x O O表示, Mg y O z O。 本发明还涉及一种制备上述催化剂组合物的方法。
摘要:
The present disclosure provides methods for pre-treating activated carbon before it is used in a dehydrochlorination process. The methods can comprise mixing the activated carbon with an acid, an oxidizing agent in a liquid phase, or an oxidizing agent in a gas phase. Activated carbons undergoing one or more of these methods can exhibit improved stability during the dehydrochlorination process.