Patent US2944091A successfully refreshed from Google Patents.
US2944091A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing refined benzol
Assignee: Gelsenkirchener Bergwerks AG
•
Filing: 1957-04-08
•
Granted: 1960-07-05
•
Expires: 1977-04-08
Abstract
No abstract record available.
Inventors
- 👤 Sonntag Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:20
CPC Classifications
C; C10; C10K; C10K3/00; C10K3/02; C10K3/04; C07; C07C; C07C7/00; C07C7/005; C07C7/148
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A METHOD OF PRODUCING REFINED BENZOL FROM COKE OVEN GAS CONTAINING CRUDE BENZOL, COMPRISING THE STEPS OF REMOVING AMMONIA FROM SAID COKE OVEN GAS, COMPRESSING AND HEATING THE THUS FORMED SUBSTANTIALLY AMMONIA-FREE COKE OVEN GAO TO A PRESSURE OF BETWEEN ABOUT 5 AND 30 ATMOSPHERES AND A TEMPERATURE OF BETWEEN ABOUT 300* AND 450*C., CONTACTING SAID HEATED AND COMPRESSED SUBSTANTIALLY AMMONIA-FREE COKE OVEN GAS WITH A SULFIDE CATALYST SO AS TO AT LEAST PARTIALLY CRACK AND HYDROGENATE THE CRUDE BENZOL CONTAINED IN SAID COMPRESSED COKE OVEN GAS, THEREBY REFINING SAID CRUDE COMPRESSED SCRUBBING THE THUS TREATED GAS WITH A WASH OIL FREE OF GUM-FORMING CONSTITUTENTS SO AS TO FORM A SOLUTION CONSISTING ESSENTIALLY OF SAID REFINED BENZOL DISSOLVED IN SAID WASH OIL.
Claim 2
Independent Claim
122 words
A METHOD OF PRODUCING REFINED BENZOL FROM COKE OVEN GAS CONTAINING CRUDE BENZOL, COMPRISING THE STEPS OF REMOVING AMMONIA FROM SAID COKE OVEN GAS, COMPRESSING AND HEATING THE THUS FORMED SUBSTANTIALLY AMMONIA-FREE COKE OVEN GAO TO A PRESSURE OF BETWEEN ABOUT 5 AND 30 ATMOSPHERES AND A TEMPERATURE OF BETWEEN ABOUT 300* AND 450*C., CONTACTING SAID HEATED AND COMPRESSED SUBSTANTIALLY AMMONIA-FREE COKE OVEN GAS WITH A SULFIDE CATALYST SO AS TO AT LEAST PARTIALLY CRACK AND HYDROGENATE THE CRUDE BENZOL CONTAINED IN SAID COMPRESSED COKE OVEN GAS, THEREBY REFINING SAID CRUDE COMPRESSED SCRUBBING THE THUS TREATED GAS WITH A WASH OIL FREE OF GUM-FORMING CONSTITUTENTS SO AS TO FORM A SOLUTION CONSISTING ESSENTIALLY OF SAID REFINED BENZOL DISSOLVED IN SAID WASH OIL.
References Cited (Backward Citations)
GB191316493A
Cited
GB345738A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-05 | 1964-01-04 | 1964-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-05 | 1968-01-04 | 1968-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-05 | 1972-01-04 | 1972-07-05 | $7700.00 | Window Closed / Lapsed |