C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
260/369
C07D 301/16 (2006.01) C07C 407/00 (2006.01) C07C 409/00 (2006.01) C07C 409/24 (2006.01) C07C 409/26 (2006.01) C07D 301/14 (2006.01)
Patent
CA 1070703
GC36 Interox Chemicals Limited Epoxidation Abstract The invention provides a process for epoxidation of an alkene by reaction with a peracid, characterised by supplying an aqueous phase comprising sulphuric acid, hydrogen peroxide and water and an organic phase comprising acetic acid or propionic acid in a chlorinated hydrocarbon solvent to a liquid-liquid extraction device in such manner that these two phases pass in countercurrent through the extraction device; withdrawing from such extraction device an organic solution of peracid and carboxylic acid in the chlorinated hydrocarbon; passing said organic solution and the alkene cocurrently to a reactor; withdrawing from the reactor a product mixture and effecting fractional distillation there- of; withdrawing from such fractional distillation a product phase comprising the oxirane and a recycle phase comprising carboxylic acid in the chlorinated hydrocarbon, and passing such recycle phase from the distillation to the extraction device to form the organic phase therein. The importance of the invention resides in the integration of the epoxidation step with that of the manufacture of the peracid, and in the fact that the carboxylic acid, sulphuric acid and chlorinated hydrocarbon solvent are all recycled. - 1 -
243859
Greenhalgh Peter F.
Hildon Anthony M.
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