US4171345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacture of reinforcing carbon black
Assignee: Vish Chimiko Technologicheski Institute
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Filing: 1977-07-26
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Granted: 1979-10-16
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Expires: 1997-07-26
Abstract
Abstract A method for the production of carbon black which comprises the steps of pyrolyzing at a temperature range of from 250° C. to 950° C., a composition consisting of 0 to 100% scrap vulcanized rubber, 0 to 70% particulate and yarn polymeric resin wastes, and 0 to 50% coke-production, petroleum-refining and petrochemical-derived hydrocarbons to form a mixture of volatile products; recovering and condensing from the products a fraction of cyclic hydrocarbons having a correlation index in excess of 90; and injecting said cyclic hydrocarbon fraction as the feedstock to a carbon-black generating burner to form carbon black.
Inventors
- 👤 Vassil S. Toshev
- 👤 Yordan G. Patov
- 👤 Emilia I. Angelova
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:34
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/482; C10; C10B; C10B53/00; C10B53/07; C01; C01P; C01P2006/00; C01P2006/12; C01P2006/19; Y; Y02; Y02P; Y02P20/00; Y02P20/141; Y02P20/143
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
147 words
A method for the production of carbon black which comprises the steps of (a) pyrolyzing at a temperature range of from 250° C. to 950° C., a composition consisting of 0 to 100% scrap vulcanized rubber, 0 to 70% particulate and yarn polymeric resin wastes, and 0 to 50% coke-production, petroleum-refining and petrochemical-derived hydrocarbons to form a mixture of volatile products; (b) heating said volatile products to a temperature in the range 400° C. to 900° C.; (c) thereafter recovering and condensing from said products a fraction of cyclic hydrocarbons having a correlation index in excess of 90 and mean boiling temperature not higher than 390° C. and a boiling range of 200° C. to 500° C.; and (d) injecting said cyclic hydrocarbon fraction as a substantial portion of the feedstock in admixture with other carbon black feedstock to a carbon-black generating burner to form carbon black.
Claim 2
Independent Claim
147 words
A method for the production of carbon black which comprises the steps of (a) pyrolyzing at a temperature range of from 250° C. to 950° C., a composition consisting of 0 to 100% scrap vulcanized rubber, 0 to 70% particulate and yarn polymeric resin wastes, and 0 to 50% coke-production, petroleum-refining and petrochemical-derived hydrocarbons to form a mixture of volatile products; (b) heating said volatile products to a temperature in the range 400° C. to 900° C.; (c) thereafter recovering and condensing from said products a fraction of cyclic hydrocarbons having a correlation index in excess of 90 and mean boiling temperature not higher than 390° C. and a boiling range of 200° C. to 500° C.; and (d) injecting said cyclic hydrocarbon fraction as a substantial portion of the feedstock in admixture with other carbon black feedstock to a carbon-black generating burner to form carbon black.
Claim 3
Dependent Claim
18 words
The method according to claim 1 wherein the recovery of the cyclic hydrocarbon fraction is by fractional distillation.
Claim 4
Dependent Claim
24 words
The method according to claim 1 wherein the recovery of the cyclic hydrocarbon fraction is a solvent extraction separation and said solvent is furfural.
References Cited (Backward Citations)
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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) | 1982-10-15 | 1983-04-16 | 1983-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-15 | 1987-04-16 | 1987-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-15 | 1991-04-16 | 1991-10-16 | $7700.00 | Window Closed / Lapsed |