# US 2018/0021765 A1 · Process of producing and use of a treated, promoted ion exchange resin catalyst

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- Number: US 2018/0021765 A1
- Document ID: US20180021765A1
- Status: Published application
- Kind: A1
- Application number: 15/724,358
- Filed: 2017-10-04
- Published: 2018-01-25
- Earliest claimed: 2011-12-28
- Applicants: Rohm and Haas Company
- Inventors: Robert J. Olsen; Alfred K. Schultz; Gregory C. Pierce; Klaus-Dieter Topp
- Web page: https://patentgrep.com/patent/US20180021765A1

## CPC

- B01J 31/10: sulfonated
- C07C 37/20: using aldehydes or ketones
- B01J 2231/347: via cationic intermediates, e.g. bisphenol A type processes
- B01J 2231/40: Substitution reactions at carbon centres, e.g. C-C or C-X, i.e. carbon-hetero atom, cross-coupling, C-H activation or ring-opening reactions
- B01J 2531/007: Promoter-type Additives
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS

## Abstract

The present invention relates to the treatment of a promoted strong acid ion exchange resin for use as an acid catalyst with an antioxidant to protect the resin from oxidative degradation and the use of said treated promoted ion exchange resin catalyst in chemical production processes.

## Claims

### Claim 1

A process for producing a treated promoted ion exchange resin catalyst comprising
providing a promoted ion exchange resin catalyst having an attached thiol promoter, and
contacting the promoted ion exchange resin catalyst with 2,6-di-t-butyl-.alpha.-dimethylamino-p-cresol to produce a treated promoted ion exchange resin.

### Claim 2 (depends on 1)

The process of claim 1 wherein the ion exchange resin catalyst is a sulfonic acid-type cation-exchange resin catalyst.

### Claim 3 (depends on 2)

The process of claim 2 wherein the cation-exchange resin catalyst is a sulfonated styrene-divinyl benzene copolymer.

### Claim 4 (depends on 1)

The process of claim 1 wherein the amount of antioxidant incorporated into the cation-exchange resin catalyst is from 0.001 to 10 percent by weight.

### Claim 5 (depends on 1)

The process of claim 1 wherein the 2,6-di-t-butyl-.alpha.-dimethylamino-p-cresol is bound.

### Claim 6 (depends on 1)

The process of claim 1 wherein the thiol promoter is attached to the resin via an amine group of the promoter.

### Claim 7 (depends on 1)

The process of claim 1, wherein the thiol promoter is selected from the group consisting of 2-mercaptomethylpyridine, cysteamine, and 4-aminobutanethiol.

### Claim 8 (depends on 1)

The treated promoted ion exchange resin of claim 1.

### Claim 9 (depends on 8)

The method of using the treated promoted ion exchange resin of claim 8 in a condensation reaction.