FIELD: chemistry.
SUBSTANCE: invention relates to versions of a method of producing 2,3,3,3-tetrafluoropropylene (1234yf), which includes: (a) reaction of 1,1,2,3,3,3-hexafluoropropylene (1216) with hydrogen in the presence of a hydrogenation catalyst to form 1,1,2,3,3,3-hexafluoropropane (236ea); (b) dehydrofluorination of 236ea to form 1,2,3,3,3-pentafluoropropylene (1225ye); (c) reaction of 1225ye with hydrogen in the presence of a hydrogenation catalyst to form 1,2,3,3,3-pentafluoropropane (245eb); and (d) dehydrofluorination of 245eb to form 1234yf. One of the versions of the method comprises continuously carrying out steps (a), (b), (c) and (d) in the given order and the second version comprises semi-continuously carrying out said steps using one hydrogenation reactor and one dehydrofluorination reactor.
EFFECT: use of the present method enables to avoid use of expensive reactants and formation of toxic by-products.
25 cl, 3 ex, 3 tbl, 3 dwg
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