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US4178317A
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US
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Manufacture of olefinically unsaturated aliphatic or cycloaliphatic hydrocarbons
Assignee: BASF SE
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Filing: 1978-05-19
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Granted: 1979-12-11
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Expires: 1998-05-19
Abstract
Abstract Olefinically unsaturated aliphatic or cycloaliphatic hydrocarbons are manufactured by bringing alkanecarboxylic acids of 3 to 20 carbon atoms, alkanedicarboxylic acids of 4 to 20 carbon atoms or 5-membered or 6-membered cycloalkanecarboxylic acids or their alkyl, cycloalkyl, aralkyl or phenyl esters, in the gas phase, at from 250° to 800° C., into contact with catalysts in which the active composition consists of boron trioxide, boric acid and/or boron nitride, together with one or more of the oxides of aluminum, silicon, tin, lead, titanium and zirconium.
Inventors
- 👤 Peter Horn
- 👤 Otto-Alfred Grosskinsky
- 👤 Hugo Fuchs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:29
CPC Classifications
C; C07; C07C; C07C1/00; C07C1/20; C07C1/207; C07C1/213; C07C1/2078; C07C2521/00; C07C2521/02; C07C2521/04; C07C2521/06; C07C2521/08; C07C2523/00; C07C2523/14; C07C2527/00; C07C2527/24; C07C2601/00; C07C2601/06; C07C2601/10; C07C2601/12; C07C2601/16; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
110 words
A process for the manufacture of olefinically unsaturated aliphatic or cycloaliphatic hydrocarbons which comprises: contacting at least one member of the group consisting of (a) alkanecarboxylic acids of 3 to 20 carbon atoms, (b) 5-membered or 6-membered cycloalkanecarboxylic acids and (c) alkyl, cycloalkyl, aralkyl or phenyl esters of (a) or (b), in the gas phase, at a temperature of from about 250° to 800° C., with a catalyst in which the active material is a combination of a compound selected from the group consisting of boron trioxide, boric acid and boron nitride and a compound selected from the group consisting of aluminum oxide, silicon dioxide, titanium dioxide and zirconium dioxide.
Claim 2
Dependent Claim
110 words
A process for the manufacture of olefinically unsaturated aliphatic or cycloaliphatic hydrocarbons which comprises: contacting at least one member of the group consisting of (a) alkanecarboxylic acids of 3 to 20 carbon atoms, (b) 5-membered or 6-membered cycloalkanecarboxylic acids and (c) alkyl, cycloalkyl, aralkyl or phenyl esters of (a) or (b), in the gas phase, at a temperature of from about 250° to 800° C., with a catalyst in which the active material is a combination of a compound selected from the group consisting of boron trioxide, boric acid and boron nitride and a compound selected from the group consisting of aluminum oxide, silicon dioxide, titanium dioxide and zirconium dioxide.
Claim 3
Dependent Claim
16 words
The process of claim 1, wherein the temperature is maintained at from 250° to 700° C.
Claim 4
Dependent Claim
28 words
The process of claim 1, wherein the catalyst contains from 10 to 60% by weight of boron trioxide, boric acid and/or boron nitride, based on the active composition.
Claim 5
Dependent Claim
10 words
The process of claim 1, wherein boron trioxide is used.
Claim 6
Dependent Claim
32 words
The process of claim 1, wherein the active composition additionally contains one or more of the elements of group VIII of the periodic table, manganese, chromium, copper, zinc, cadmium, silver or gold.
Claim 7
Dependent Claim
9 words
The process of claim 1, wherein alumina is used.
Claim 8
Dependent Claim
9 words
The process of claim 1, wherein α-alumina is used.
Claim 9
Dependent Claim
24 words
The process of claim 1, wherein hexahydrobenzoic acid or one of its alkyl, cycloalkyl, aralkyl or phenyl esters is used as the starting material.
Claim 10
Dependent Claim
35 words
The process of claim 1, wherein the catalyst corresponds to the composition 9 Al 2 O 3 . 2 B 2 O 3 or 2 Al 2 O 3 . B 2 O 3 .
References Cited (Backward Citations)
GB943745A
Cited
US4024171A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-12-10 | 1983-06-11 | 1983-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-10 | 1987-06-11 | 1987-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-10 | 1991-06-11 | 1991-12-11 | $7700.00 | Window Closed / Lapsed |