Process for purification of olefin feed comprising 1234yf
AssigneeSRF Limited
InventorsJose GEORGE, Sunil RAJ, Ambuj Kumar MISHRA, Anurag KATIYAR, Anurag JAIN, Sudip MAITY
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Abstract
The present invention relates to a process for purifying olefin feed comprising R-5 1234yf, R-40, R-134a, R-134, R-1225zc, and OFCB, comprising the step of separating different ternary and binary azeotrope compositions comprising 1234yf. The olefin feed is obtained from the pyrolysis of tetrafluoroethylene/chlorodifluoromethane with chloromethane/methane, optionally in presence of initiator.
Claims15
A process for purification of R-1234yf feed comprising R-1234yf, R-40, R-134a, R-134, R-1225zc, and OFCB, said process comprising a step of separating a ternary azeotrope composition “A” comprising about 52 mole % to about 62 mole % of R-1234yf, about 25 mole % to about 34 mole % of R-40 and about 2 mole % to about 25 mole % of R-134a R-1234yf, R-40 and R-134a.
A process for purification of R-1234yf feed comprising R-1234yf, R-40, R-134a, R-134, R-1225zc, and OFCB, said process comprising a step of separating a binary azeotrope composition “B” comprising about 10 mole % to about 35 mole % of R-134a and about 65 mole % to about 90 mole % of 1234yf R-1234yf and R-134a.
A process for purification of R-1234yf feed comprising R-1234yf, R-40, R-134a, R-134, R-1225zc, and OFCB, said process comprising a step of separating a ternary azeotrope composition “C” comprising about 70 mole % to about 85 mole % of R-1234yf, about 5 mole % to about 15 mole % of R-134 and about 2 mole % to about 20 mole % of R-134a.
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Dependencies are inferred from the claim text.