摘要:
Disclosed is an integrated process to co-produce trans-1-chloro-3,3,3-trifluoro-propene (1233zd(E)), trans-1,3,3,3-tetrafluoropropene (1234ze(E)), and 1,1,1,3,3-pentafluoropropane (245fa). Overall the co-production is a three-step process. The chemistry involves the steps of: (1) the reaction of 240fa with anhydrous HF in excess in a liquid-phase catalyzed reactor in such a way as to co-produce primarily 1233zd(E) and 244fa (plus byproduct HCl); (2) the 244fa stream can then be used to directly produce any of the three desired products; (3a) the 244fa stream can be dehydrochlorinated to produce the desired second product 1234ze(E); and/or (3b) the 244fa stream can be dehydrofluorinated to produce 1233zd(E) if more of that product is desired; and/or (3c) the 244fa stream can be further fluorinated to form 245fa.
摘要:
Disclosed are processes for an isomerization reaction between (E)1-chloro-3,3,3-trifluoropropene and (Z)1-chloro-3,3,3-trifluoropropene. Some of the disclosed processes include the step of contacting a feed stream with a heated surface, where the feed stream includes (E)1-chloro-3,3,3-trifluoropropene, (Z)1-chloro-3,3,3-trifluoropropene or mixtures thereof. The resulting product stream includes (E)1-chloro-3,3,3-trifluoropropene and (Z)1-chloro-3,3,3-trifluoropropene, where the ratio of (E) isomer to (Z) isomer in the product stream is different than the ratio feed stream. The (E) and (Z) isomers in the product stream may be separated from one another.
摘要:
Provided is a process for purifying an organic feedstock comprising (a) distilling a raw organic feedstock comprising hydrogen fluoride, 2-chloro-1,1,1,2-tetrafluoropropane, and 2-chloro-3,3,3-trifluoropropene to produce a first distillate stream comprising an azeotrope-like composition of 2-chloro-1,1,1,2-tetrafluoropropane, 2-chloro-3,3,3-trifluoropropene, and hydrogen fluoride, and a first bottoms stream rich in hydrogen fluoride; (b) cooling said first distillate stream to produce an intermediate composition comprising an organic layer rich in 2-chloro-1,1,1,2-tetrafluoropropane and 2-chloro-3,3,3-trifluoropropene, and an acid layer rich in hydrogen fluoride; and, optionally but preferably, (c) distilling said organic layer to produce a second distillate stream comprising an azeotrope-like composition of 2-chloro-1,1,1,2-tetrafluoropropane, 2-chloro-3,3,3-trifluoropropene, and hydrogen fluoride, and a second bottoms stream comprising a purified organic feedstock substantially free of hydrogen fluoride.
摘要:
Disclosed are compositions and systems having utility in numerous situations, including in particular solvent cleaning systems, as well as refrigerant lubricants and/or compatibilizing agents, and to methods which utilize such compositions and systems. More particularly, the present invention in preferred aspects is directed to solvents, blowing agents, heat transfer fluids and compatibilizing agents comprising the compound 3-chloro-1,1,1,6,6,6-hexafluoro-2,4-hexadiene. In particular, this invention provides a method for the production of the compound of Formula I, 3-chloro-1,1,1,6,6,6- hexafluoro-2,4-hexadiene,comprising reacting 1,1,1,3,3-pentachloropropane with hydrogen fluoride in the presence of a catalyst, in a reactor.
摘要:
Disclosed is a process for the preparation of 3,3,3-trifluoropropene comprising the steps of; (1) fluorination of 240fa to form 245fa; (2) conversion of 245fa to a cis/trans mixture of 1234ze; (3) hydrogenation of the cis/trans mixture of 1234ze to form 254fb; and (4) dehydrofluorination of 254fb to produce 3,3,3-trifluoropropene. Alternatively or additionally, a second process for the preparation of the desired compound comprises the following steps; (1) fluorination of HCC-240fa to form HCFC-244fa; (2) conversion of 244fa to a cis/trans mixture of HFO-1234ze; (3) hydrogenation of the cis/trans mixture of 1234ze to form HFC-254fb; and (4) dehydrofluorination of 254fb to produce 3,3,3-trifluoropropene.
摘要:
Provided are methods for producing fluorinated organic compounds, which preferably comprises converting at least one compound of formula (I) CH2XCHZCF3 to at least one compound of formula (II) CHX═CZCF3 where X and Z are independently H or F, with the proviso that X and Z are not the same. The converting step comprises catalytically reacting at least one compound of formula (I), preferably via dehydrogenation or oxidative dehydrogenation. In another aspect, the inventive method of preparing fluorinated organic compounds comprises converting a reaction stream comprising at least one pentafluoropropene to a product stream comprising at least one pentafluoropropane and at least one compound of formula (I), separating out the compound of formula (I) from the product stream, and converting the compound of formula (I) separated from the product stream to at least one compound of formula (II), wherein the conversion the compound of formula (I) to 3,3,3-trifluoropropyne is substantially limited.
摘要:
Disclosed are compositions and systems having utility in numerous situations, including in particular solvent cleaning systems, as well as refrigerant lubricants and/or compatibilizing agents, and to methods which utilize such compositions and systems. More particularly, the present invention in preferred aspects is directed to solvents, blowing agents, heat transfer fluids and compatibilizing agents comprising the compound 3-chloro-1,1,1,6,6,6-hexafluoro-2,4-hexadiene.
摘要:
Compositions and methods based on the use of fluoroalkene containing from 3 to 4 carbon atoms and at least one carbon-carbon double bond, such as HFO-1214, HFO-HFO-1233, or HFO-1354, having properties highly beneficial in solvent cleaning applications.
摘要:
An integrated process for the manufacture of HFO trans-1,3,3,3-tetrafluoropropene (HFO trans-1234ze) by first catalytically dehydrofluorinating 1,1,1,3,3-pentafluoropropane to thereby produce a mixture of cis-1,3,3,3-tetrafluoropropene, trans-1,3,3,3-tetrafluoropropene and hydrogen fluoride. Then optionally recovering hydrogen fluoride, catalytically isomerizing cis-1234ze into trans-1234ze, and recovering trans-1,3,3,3-tetrafluoropropene.