US4175211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for treatment of rubber and plastic wastes
Assignee: Mobil Oil AS
•
Filing: 1978-03-01
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Granted: 1979-11-20
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Expires: 1998-03-01
Abstract
Abstract A process for converting relatively ash-free solid polymeric wastes to more valuable liquid, solid, and gaseous products which comprises mixing rubber and/or plastic wastes at high temperatures in a refractory petroleum stream and catalytically cracking the mixture.
Inventors
- 👤 Nai Y. Chen
- 👤 Tsoung-Yuan Yan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:20
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/10; C10B; C10B49/00; C10B49/16; C10B49/20; C10B49/22; C10B53/00; C10B53/07; Y; Y02; Y02P; Y02P20/00; Y02P20/141; Y02P20/143
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
116 words
A process for the conversion of solid plastic wastes selected from the group consisting of poly(halogenated hydrocarbons), poly(straight-chain olefins), and poly(vinyl aromatics) to distillates including a gasoline fraction which comprises: (a) grinding the wastes, (b) adding a selected petroleum-derived stream to the ground wastes, (c) maintaining the resulting mixture at a temperature of about 150° to 700° F. for a sufficient time for dissolution to occur, (d) feeding the resulting solution to a catalytic cracking zone operated at a temperature of 850° F. or more and a pressure from subatmospheric to 3 atmospheres, (e) withdrawing a cracked product from the catalytic cracking zone, and (f) distilling the cracked product to recover distillates including a gasoline fraction.
Claim 2
Dependent Claim
116 words
A process for the conversion of solid plastic wastes selected from the group consisting of poly(halogenated hydrocarbons), poly(straight-chain olefins), and poly(vinyl aromatics) to distillates including a gasoline fraction which comprises: (a) grinding the wastes, (b) adding a selected petroleum-derived stream to the ground wastes, (c) maintaining the resulting mixture at a temperature of about 150° to 700° F. for a sufficient time for dissolution to occur, (d) feeding the resulting solution to a catalytic cracking zone operated at a temperature of 850° F. or more and a pressure from subatmospheric to 3 atmospheres, (e) withdrawing a cracked product from the catalytic cracking zone, and (f) distilling the cracked product to recover distillates including a gasoline fraction.
Claim 3
Dependent Claim
27 words
The process of claim 1 wherein the solution of solid plastic wastes is mixed with conventional cracking stock prior to being fed to the catalytic cracking zone.
Claim 4
Dependent Claim
17 words
The process of claim 2 wherein a portion of the recovered distillates is the selected petroleum-derived stream.
Claim 5
Dependent Claim
23 words
The process of claim 1 wherein the solid plastic wastes are ground to particles capable of passing through 5 to 25 mesh screens.
Claim 6
Dependent Claim
27 words
The process of claim 1 wherein the solid plastic wastes contain poly(halogenated hydrocarbons) and hydrogen chloride is recovered from a gaseous fraction distilled from the cracked product.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-11-19 | 1983-05-21 | 1983-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-19 | 1987-05-21 | 1987-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-19 | 1991-05-21 | 1991-11-20 | $7700.00 | Window Closed / Lapsed |