Claims
- 1. A process for the preparation of an acylbenzene of the formula: ##STR3## wherein R.sup.2 represents hydrogen, methyl, ethyl, isopropyI or straight-chain C.sub.3-4 -alkyl;
- said process comprising reacting benzene with the free form of a carboxylic acid of the formula: ##STR4## on an acid catalyst, in the gas phase, in a molar ratio of benzene:carboxylic acid of 1-50:1, and at a temperature of 250.degree.-400.degree. C., and wherein said acid catalyst is a zeolite of the Pentasil type selected from the group consisting of:
- (i) M.sup.1 /Al/Si-zeolites having an SiO.sub.2 :AlO.sub.2 ratio of 50-150:1, wherein M.sup.1 represents an alkaline earth metal cation; and
- (ii) M.sup.1' /M.sup.2 /Si-zeolites having an SiO.sub.2 :M.sup.2 O.sub.2 ratio of 50-150:1, wherein M.sup.1' represents H+ or an equivalent of an exchangeable cation and M.sup.2 represents a trivalent atom selected from the group consisting of B, Ga, In, Fe, Cr, V, As and Sb.
- 2. The process according to claim 1, wherein the zeolite is a M.sup.1 /Al/Si-zeolite.
- 3. The process of claim 1, wherein the molar ratio of benzene:carboxylic acid is 5-30:1.
- 4. The process of claim 3, wherein the molar ratio of benzene:carboxylic acid is 10-20:1.
- 5. The process of claim 1, wherein benzene and benzoic acid are reacted to give benzophenone.
- 6. The process of claim 5, wherein the reaction is carried out at 250.degree.-300.degree. C. up to a benzoic acid conversion of 20-40% of the benzoic acid employed.
- 7. The process of claim 1, wherein M.sup.2 represents one element or more from the group comprising Al, B, Ga, and Fe.
- 8. The process according to claim 1, wherein the reaction is carried out at a temperature of 250.degree.-300.degree. C.
Priority Claims (1)
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4027276 |
Aug 1990 |
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Parent Case Info
This application is a continuation of application Ser. No. 07/980,147, filed Nov. 23, 1992 now abandoned, which is a continuation of application Ser. No. 07/748,606, filed Aug. 22, 1991 now abandoned.
US Referenced Citations (4)
Foreign Referenced Citations (4)
Number |
Date |
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0239383 |
Sep 1987 |
EPX |
0279322 |
Aug 1988 |
EPX |
2592039 |
Jun 1987 |
FRX |
2616583 |
Oct 1976 |
DEX |
Non-Patent Literature Citations (3)
Entry |
Friedel-Crafts and Related Reactions, G. A. Olah (ed.), Interscience Publishers, 1963, pp. 34, 35, 96, 97. |
Mechanism and Structure in Organic Chemistry, E. S. Gould (ed.), Henry Holt and Company, 1959, pp. 428 and 429. |
Knoche et al., J. Am. Chem. Soc., 110:7484-7489 (1988). |
Continuations (2)
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Parent |
980147 |
Nov 1992 |
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Parent |
748606 |
Aug 1991 |
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