Oleum sulphonation process

Details Oleum sulphonation process Oleum sulphonation process

C - Chemistry, Metallurgy

07

C

260/386, 260/466

C07C 309/52 (2006.01) C07C 303/06 (2006.01) C07D 295/14 (2006.01) C07F 9/54 (2006.01) C07C 309/42 (2006.01)

Patent

CA 2002640

C 6067 (R) ABSTRACT OF THE DISCLOSURE A process is provided for obtaining sulphophenyl quaternary ammonium or phosphonium substituted carbonic acid esters. The important step in this process involves reacting a phenyl quaternary ammonium or phosphonium substituted carbonic ester with oleum that contains from 0.5 up to 33% sulphur trioxide. Amounts in excess of 33% sulphur trioxide lead to increased reaction times and, eventually, unacceptable product conversions.

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