Patent US3671462A successfully refreshed from Google Patents.
US3671462A
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Disproportionation catalyst
Assignee: BP PLC
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Filing: 1969-10-15
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Granted: 1972-06-20
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Expires: 1989-10-15
Abstract
Abstract A heterogeneous disproportionation catalyst is provided which consists essentially of (a) a salt of molybdenum or tungsten (b) tetrabutyl tin and (c) a solid support selected from the group consisting of alumina, silica, magnesia, sepiolite, boria, thoria, charcoal, pumice and molecular sieve and wherein the molar ratio of the tungsten or molybdenum salt to tetrabutyl tin is in the range of from about 5:1 to 0.01:1 and the support is present in an amount of from about 10 to 99.9 percent by weight expressed as a percentage by weight of the total weight of the salt, tetrabutyl tin and support.
Inventors
- 👤 Joan Irenee O'hara
- 👤 Christopher Patrick C Bradshaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:46
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/02; B01J31/12; B01J31/122; B01J31/14; B01J31/143; B01J31/16; B01J31/1616; B01J31/26; B01J31/34; C; C07; C07C; C07C6/00; C07C6/02; C07C6/04; B01J2231/00; B01J2231/50; B01J2231/54; B01J2231/543; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/906
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
30 words
A catalyst as claimed in claim 1 wherein the molar ratio of the tungsten or molybdenum salt to tetrabutyl tin is in the range of from about 1:1 to 0.1:1.
Claim 2
Dependent Claim
38 words
A catalyst as claimed in claim 1 wherein the support is present in an amount of from about 85 to 99 percent expressed as a percentage by weight of the total weight of salt, tetrabutyl tin and support.
Claim 3
Dependent Claim
40 words
A catalyst as claimed in claim 1 wherein the catalyst is activated by the addition of methanol and wherein the molar ratio of tungsten or molybdenum salt to the methanol is in the range of from about 0.1:1 to 20:1.
Claim 4
Dependent Claim
21 words
A catalyst as claimed in claim 4 wherein the molar ratio is in the range of from about 1:1 to 2:1.
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) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |