Patent US3755143A successfully refreshed from Google Patents.
US3755143A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for rearranging the structures of crude oil or crude oil fractions
Assignee: Kureha Corp
•
Filing: 1970-04-23
•
Granted: 1973-08-28
•
Expires: 1990-04-23
Abstract
Abstract A process for producing useful intermediate products from crude oil or crude oil fractions comprising pyrolysis by contacting the crude oil with high temperature steam to produce a mixture of volatile hydrocarbons and polycyclic aromatic tars and subsequently reacting the tars with hydrogen or an olefin is disclosed.
Inventors
- 👤 T Hosoi
- 👤 R Takahashi
- 👤 S Gomi
- 👤 K Washimi
- 👤 M Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:09
CPC Classifications
C; C10; C10G; C10G65/00; C10G65/02; C10G65/04; C10G65/08; C10G49/00; C10G49/007; C10G69/00; C10G69/02; C10G69/06
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
23 words
The method as claimed in claim 1, wherein said steam used in step (1) is at a temperature of from 1,500* to 2,300*C.
Claim 2
Dependent Claim
19 words
desufurizing said polycyclic aromatic tars by hydrogenating said polycyclic aromatic tars with the hydrogen produced in step (1); and
Claim 3
Dependent Claim
31 words
hydrogenating the product of step (2) with the hydrogen produced in step (1) at a temperature of from 150* to 450*C. and at a pressure of from 40 to 200 kg/cm2.
Claim 4
Dependent Claim
33 words
The method as claimed in claim 1, wherein the pyrolysis in step (1) is conducted at a reaction temperature of from 900* to 1,500*C for a period of from 0.001 to 0.1 second.
Claim 5
Dependent Claim
22 words
The method as claimed in claim 1, wherein the pyrolysis is conducted by spraying the crude oil raw material into the steam.
Claim 6
Dependent Claim
41 words
The method of claim 1 wherein said gaseous mixture produced in step (1) comprises 30 to 50 percent acetylene, ethylene and propylene, 3 to 5 percent hydrogen, 5 to 15 percent light aromatics and 10 to 30 of polycyclic aromatic tars.
Claim 7
Dependent Claim
18 words
The method of claim 1 wherein said desulfurizing step is conducted in the presence of a desulfurizing catalyst.
Claim 8
Dependent Claim
18 words
The method of claim 1 wherein said hydrogenating step is conducted in the presence of a hydrogenation catalyst.
Claim 9
Dependent Claim
23 words
The method of claim 1 wherein the product of step (2), before being hydrogenated in step (3), is subjected to a fractional distillation.
Claim 10
Dependent Claim
23 words
The method of claim 5 wherein the product of step (1), before being desulfurized in step (2), is subjected to a fractional distillation.
Claim 11
Dependent Claim
10 words
The method of claim 1 consisting of the recited steps.
References Cited (Backward Citations)
US2345877A
Cited
US2662051A
Cited
US2752290A
Cited
US2847366A
Cited
US2970099A
Cited
US3050457A
Cited
US3324029A
Cited
US3600298A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |