摘要:
Dehydrohalogenation processes for the preparation of fluoropropenes from corresponding halopropanes, in which the fluoropropenes have the formula CF3CY═CXNHP, wherein X and Y are independently hydrogen or a halogen selected from fluorine, chlorine, bromine and iodine; and N and P are independently integers equal to 0, 1 or 2, provided that (N+P)=2.
摘要翻译:用于从相应的卤代丙烷制备氟丙烯的脱卤化氢方法,其中氟丙烯具有式CF 3 C 1 -C 6 N N H P H,其中X Y独立地为氢或选自氟,氯,溴和碘的卤素; 并且N和P独立地为等于0,1或2的整数,条件是(N + P)= 2。
摘要:
A process for the preparation of trifluoromethyl iodide is provided. The process includes the step of contacting in a reactor a compound represented by the formula: CF3—W and a compound represented by the formula: IFn wherein W can be H, Br, Cl, COOH, COCl, COOCH3, COOC2H5, COCH3, COPh, CF3, Si(CH3)3, SPh, SCH3, SSCF3, SSPh, SSCH3, or SO2Cl, wherein n is 1, 3, 5, or 7, and wherein the step of contacting is carried out, at a temperature, pressure and for a length of time sufficient to produce trifluoromethyl iodide. The contacting step can be carried out in the presence or absence of a catalyst and the contacting step can be carried out in the presence or absence of air.
摘要:
The invention relates to azeotropic and azeotrope-like mixtures of 1-chloro-1,3,3,3-tetrafluoropropane (HCFC-244fa) and hydrogen fluoride, which are useful as intermediates in the production of HCFC-244fa.
摘要:
The present invention provides a vapor phase process for the production of difluoromethane, HFC-32. The process of this invention provides for the preparation of HFC-32 by a process that exhibits both good product yield and selectivity.
摘要:
A method of producing hydrofluorocarbons and methods of producing other commercially attractive compounds formed as by-products of hydrofluorocarbon production by using aldehydes as a principal reactant.
摘要:
A process for the preparation of halogenated alkanes is provided. In particular, a process is provided for the highly selective preparation of haloalkanes, including 1,1,1,3,3-pentachloropropane, pentachlorobutane, and hepatchlorohexane, in good yield.
摘要:
The invention relates to a novel process for purifying HCFC-123 and HCFC-124 comprising: (a) reacting a fluorination reaction product comprising HCFC-123 and HCFC-123a and/or HCFC-124 and HCFC-124a wherein at least one of said HCFC-123a or HCFC-124a is present in an amount not less than 5 weight percent relative to HCFC-123 or HCFC-124 respectively in the product with anhydrous HF in the presence of a fluorination catalyst under conditions such that the amount of HCFC-123a and/or HCFC-124a relative to HCFC-123 and/or HCFC-124 respectively in the product is reduced to less than 5 weight percent. The pure product (i.e., HCFC-123 or HCFC-124) may be used in a variety of applications including solvent, refrigerant, sterilant gas and blowing agent applications.
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:
The present invention discloses high purity E-1-chloro-3,3,3-trifluoropropene (1233zd(E)) and methods to produce the same. More specifically, the present invention discloses the methods of making 1233zd(E) essentially free of toxic impurities (e.g. 2-chloro-3,3,3-trifluoropropene (1233xf), chlorotetrafluoro-propene (1224), and 3,3,3-trifluoropropyne). The present invention further provides methods for making high purity 1233zd(E) with concentration of 1233xf and 1224 at or below 200 parts per million (ppm) and 3,3,3-trifluoropropyne impurities at or below 20 ppm. Formation of 1233xf impurity can be avoided if pure 1,1,1,3,3-pentachloropropane is used as a starting material. It was also found that formation of 1233xf is avoided if a liquid phase manufacturing process is used.
摘要:
Provided is a process for making 2-chloro-1,1,1,2-tetrafluoropropane. The process has the step of hydrofluorinating 2-chloro-3,3,3-trifluoropropene in the presence of a catalyst selected from the group consisting of SbCl3, SbCl5, SbF5, TiCl4, SnCl4, Cr2O3, and fluorinated Cr2O3.
摘要翻译:提供了制备2-氯-1,1,1,2-四氟丙烷的方法。 该方法具有在选自SbCl 3,SbCl 5,SbF 5,TiCl 4,SnCl 4,Cr 2 O 3和氟化Cr 2 O 3的催化剂存在下氢化2-氯-3,3,3-三氟丙烯的步骤。