Method for extending the activity of acidic ion exchange catalys

Details Method for extending the activity of acidic ion exchange catalys Method for extending the activity of acidic ion exchange catalys

Filed on

1994-05-10

Date issued

1995-05-09

Examiner

Lone, Werren B.

Patent Class

Organic compounds -- part of the class 532-570 series

SubClass

Organic compounds

SubSubClass

Oxygen containing

Other Related Categories

568722, 568723, 568724, 568728, C07C 3720, C07C 3916

Type

Patent

Status

active

Patent number

054141524

Description

ABSTRACT:
The addition of 3-mercaptopropionic acid or the organic ester thereof to the reaction mixture slows the rate of deactivation of cationic catalyst resins containing mercaptan promoter sites, during preparation of bisphenols by the condensation of a ketone with a phenol.

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patent: 4045379 (1977-08-01), Kwantes et al.
patent: 4107218 (1978-08-01), Miller
patent: 4294995 (1981-10-01), Faler et al.
patent: 4346247 (1982-08-01), Faler et al.
patent: 4396728 (1983-08-01), Faler
patent: 4400555 (1983-08-01), Mendiratta
patent: 4584416 (1986-04-01), Pressman et al.
patent: 5075511 (1991-12-01), Li
patent: 5105027 (1992-04-01), Desmurs et al.

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