Claims
- 1. A process for making a resorcinol having the formula ##STR3## wherein R.sub.1 to R.sub.4 are members selected from the group consisting of H, straight-chain, branched chain, cyclic alkyl, each having up to 12 carbon atoms, phenyl and naphthyl,
- which comprises catalytically dehydrogenating in liquid phase a cyclohexane dione-(1,3) of the formula ##STR4## wherein R.sub.1 to R.sub.4 have the above-mentioned meaning; by adding said cyclohexane dione-(1,3) to a solvent mixture consisting essentially of a solvent selected from the group consisting of diethylene glycol dialkyl ether, triethylene glycol dialkyl ether and tetraethylene glycol dialkyl ether, wherein said alkyl contains up to 6 carbon atoms and a catalyst selected from the group consisting of palladium, platinum, ruthenium and rhodium;
- catalytically dehydrogenating said cyclohexane dione-(1,3) at about atmospheric pressure and a temperature of from 180.degree. to 260.degree. C., controlling the concentration of said cyclohexanone dione-(1,3) at no more than 30% by weight, based on weight of the liquid phase; and separating and recovering said resorcinol.
- 2. The process of claim 1 wherein the catalyst is supported on a carrier and the catalyst comprises 0.1 to 40 parts by weight per 100 parts by weight of solvent.
- 3. The process of claim 2 wherein the catalyst comprises 1 to 30 parts by weight per 100 parts by weight of solvent.
- 4. The process according to claim 1 wherein the reaction is carried out at a temperature in the range of from 180.degree. to 260.degree. C.
- 5. The process of claim 1 wherein cyclohexane dione-(1,3) is added to a solvent mixture consisting essentially of a solvent selected from the group consisting of diethylene glycol diethyl ether, triethylene glycol diethylether and tetraethylene glycol diethylether and said noble metal is palladium.
- 6. The process of claim 1 wherein said catalyst is supported on a carrier which is a member selected from the group consisting of carbon, aluminum oxide, silicic acid, magnesium oxide, calcium oxide, titanium oxide and asbestos.
- 7. The process of claim 1 wherein said catalyst comprises palladium supported on a carbon carrier and the palladium consists of 0.02 to 20% by weight of the catalyst.
Priority Claims (1)
Number |
Date |
Country |
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2437983 |
Aug 1974 |
DEX |
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Parent Case Info
This is a continuation application of prior application Ser. No. 602,028, filed on Aug. 5, 1975, now abandoned.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
3865884 |
Agusto et al. |
Feb 1975 |
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Continuations (1)
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Number |
Date |
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Parent |
602028 |
Aug 1975 |
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