Ethylene recovery from ethyl acrylate process

Details Ethylene recovery from ethyl acrylate process Ethylene recovery from ethyl acrylate process

C - Chemistry, Metallurgy

07

C

260/482.4

C07C 69/54 (2006.01) C07C 67/04 (2006.01)

Patent

CA 1180345

Abstract of the Disclosure Unreacted ethylene contained in a gaseous light ends stream derived from a process for the production of ethyl acrylate by the reaction of ethylene with acrylic acid in the presence of a sulfuric acid catalyst, is recovered by intimately contacting, under controlled conditions of temperature and pressure, the light ends stream with the liquid sulfuric acid catalyst make-up stream which is passed to the ethyl acrylate process. Upon contact of the light ends stream with the sulfuric acid make-up stream, the ethylene reacts with sulfuric acid to form ethyl hydrogen sulfate and diethyl sulfate, both of which remain in solution in the sul- furic acid which is then passed to the ethyl acrylate process as a source of make-up sulfuric acid. Sulfur dioxide contained in the vent-gas stream is not absorbed into the sulfuric acid, and therefore not recycled to the ethyl acrylate process.

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