US3697606A
Expired / Lapsed
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Para-phenylphenol preparation
Assignee: Union Carbide Corp
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Filing: 1968-03-20
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Granted: 1972-10-10
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Expires: 1988-03-20
Abstract
Abstract The process of preparing para-phenylphenol by heating parahexenylphenol in the liquid phase in the presence of a stoichiometric excess of a hydrogen acceptor, and a palladium, nickel or platinum catalyst.
Inventors
- 👤 Joachim E Freudewald
- 👤 Frederic M Konrad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:29
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/06; C07C37/11; C07C37/20; C07C37/50; C07C37/52; C07C2601/00; C07C2601/12; C07C2601/14
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
175 words
The process of preparing para-phenylphenol by the steps comprising: a. condensing about two moles of phenol with about one mole of cyclohexanone in the presence of a strong acid condensation catalyst at a temperatuRe of from about 40* C to about 120* C to form 1,1-bis(p-hydroxyphenol)cyclohexane; b. cleaving the formed 1,1-bis(p-hydroxylphenyl)-cyclohexane in the presence of an acidic or basic cleavage catalyst at a temperature of from about 150* C to about 250* C to form para-cyclohexenylphenol; and c. dehydrogenating the formed para-cyclohexenylphenol in an exothermic hydrogen transfer reaction by heating the reaction product of step (b) to a temperature of from about 100* C to about 180* C in the liquid phase with a stoichiometric excess of a hydrogen acceptor which is selected from the group consisting of ethylenically unsaturated hydrocarbons, acetylenically unsaturated hydrocarbons, azobenzene, Alpha -methylstyrene, nitrobenzene, para-nitrophenol, para-chloronitrobenzene, maleic anhydride, diketone methyl acetylene, indene, crotonic acid and sorbic acid; and a catalyst selected from the group consisting of nickel, palladium, platinum, rhodium, ruthenium, platinum oxide, platinum black, cobalt, nickel sulfide, iron and molybdenum.
Claim 2
Dependent Claim
17 words
The process of claim 2 wherein the condensation catalyst is hydrochloric acid and a lower alkyl mercaptan.
Claim 3
Dependent Claim
13 words
The process of claim 2 wherein the cleavage catalyst is a basic catalyst.
Claim 4
Dependent Claim
13 words
The method of claim 2 wherein the cleavage catalyst is an alkali hydroxide.
Claim 5
Dependent Claim
13 words
The method of claim 2 wherein the cleavage catalyst is a weak acid.
Claim 6
Dependent Claim
12 words
The method of claim 2 wherein the cleavage catalyst is sodium hydroxide.
Claim 7
Dependent Claim
12 words
The process of claim 1 wherein the hydrogen acceptor is Alpha -methylstyrene.
Claim 8
Dependent Claim
11 words
The process of claim 1 wherein the hydrogen acceptor is p-nitrophenol.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |