US4507517A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conversions of low molecular weight hydrocarbons to higher molecular weight hydrocarbons using a boron compound containing catalyst
Assignee: Chevron USA Inc
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Filing: 1983-10-31
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Granted: 1985-03-26
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Expires: 2003-10-31
Abstract
Abstract Disclosed is a catalytic process for the production of higher molecular weight hydrocarbons from lower molecular weight hydrocarbons. More particularly, disclosed is a catalytic process for the conversion of methane to C 2 + hydrocarbons, particularly hydrocarbons rich in ethylene or benzene, or both. The process utilizes a boron compound containing catalyst, high reaction temperature of greater than 1000° C., and a high gas hourly space velocity of greater than 3200 hr -1 .
Inventors
- 👤 Louis DeVries
- 👤 P. R. Ryason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:43
CPC Classifications
C; C07; C07C; C07C2/00; C07C2527/00; C07C2527/20; C07C2527/22; C07C2527/24; Y; Y10; Y10S; Y10S585/00; Y10S585/929; Y10S585/943
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
108 words
A process for the production of higher molecular weight hydrocarbons from lower molecular hydrocarbons comprising the steps of: (a) introducing into a reaction zone a lower molecular weight hydrocarbon-containing gas and contacting said gas in said zone with a boron compound containing catalyst under C 2 + hydrocarbon synthesis conditions such that at least 15 mole percent of the lower molecular weight hydrocarbons in said gas are converted to higher molecular weight hydrocarbons, said conditions including a temperature of greater than 1000° C. and a gas hourly space velocity of greater than 3200 hr -1 ; (b) withdrawing from said reaction zone a higher molecular weight hydrocarbon-containing stream.
Claim 2
Dependent Claim
108 words
A process for the production of higher molecular weight hydrocarbons from lower molecular hydrocarbons comprising the steps of: (a) introducing into a reaction zone a lower molecular weight hydrocarbon-containing gas and contacting said gas in said zone with a boron compound containing catalyst under C 2 + hydrocarbon synthesis conditions such that at least 15 mole percent of the lower molecular weight hydrocarbons in said gas are converted to higher molecular weight hydrocarbons, said conditions including a temperature of greater than 1000° C. and a gas hourly space velocity of greater than 3200 hr -1 ; (b) withdrawing from said reaction zone a higher molecular weight hydrocarbon-containing stream.
Claim 3
Dependent Claim
49 words
The process of claim 1 wherein said temperature is in the range of 1100° to 1200° C., said space velocity is in the range of 6,000 to 36,000 hr -1 and at least 20 mole percent of said lower molecular weight hydrocarbons are converted to higher molecular weight hydrocarbons.
Claim 4
Dependent Claim
28 words
The process of claim 2 wherein said reaction zone contains a stationary or fluidized bed of said catalyst and said catalyst comprises a boron carbide or boron nitride.
Claim 5
Dependent Claim
12 words
The process of claim 3 wherein said boron compound comprises boron nitride.
Claim 6
Dependent Claim
12 words
The process of claim 3 wherein said boron compound comprises boron carbide.
Claim 7
Dependent Claim
13 words
The process of claim 4 wherein said lower molecular weight hydrocarbon is methane.
Claim 8
Dependent Claim
32 words
The process of claim 5 wherein said temperature is in the range of 1140° to 1175° C. and said space velocity is in the range of 9,000 to 18,000 hr -1 .
Claim 9
Dependent Claim
24 words
The process of claim 6 wherein 40 or more mole percent of said methane containing hydrocarbon gas is converted to higher molecular weight hydrocarbons.
Claim 10
Dependent Claim
20 words
The process of claim 7 wherein said higher molecular weight hydrocarbon stream is rich in ethylene or aromatics or both.
Claim 11
Dependent Claim
122 words
A process for the production of higher molecular weight hydrocarbons from methane comprising the steps of: (a) introducing into a reaction zone a methane-containing gas and contacting said gas in said zone with a boron nitride containing catalyst under C 2 + hydrocarbon synthesis conditions such that at least 20 mole percent of said methane in said gas is converted to higher molecular weight hydrocarbons, said conditions including a temperature in the range of 1100° to 1200° C. and a gas hourly space velocity of 6,000 to 36,000 hr -1 ; and (b) withdrawing from said reaction zone a higher molecular weight hydrocarbon-containing stream, wherein the carbon-containing reaction products in said stream comprises greater than 90 mole percent higher molecular weight hydrocarbons.
Claim 12
Dependent Claim
122 words
A process for the production of higher molecular weight hydrocarbons from methane comprising the steps of: (a) introducing into a reaction zone a methane-containing gas and contacting said gas in said zone with a boron nitride containing catalyst under C 2 + hydrocarbon synthesis conditions such that at least 20 mole percent of said methane in said gas is converted to higher molecular weight hydrocarbons, said conditions including a temperature in the range of 1100° to 1200° C. and a gas hourly space velocity of 6,000 to 36,000 hr -1 ; and (b) withdrawing from said reaction zone a higher molecular weight hydrocarbon-containing stream, wherein the carbon-containing reaction products in said stream comprises greater than 90 mole percent higher molecular weight hydrocarbons.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-03-25 | 1988-09-24 | 1989-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-25 | 1992-09-24 | 1993-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-25 | 1996-09-24 | 1997-03-26 | $7700.00 | Window Closed / Lapsed |