US4038100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Char composition and a method for making a char composition
Assignee: Oil Shale Corp
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Filing: 1975-08-14
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Granted: 1977-07-26
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Expires: 1995-08-14
Abstract
Abstract Disclosed are a composition produced from rubber containing polymeric hydrocarbons and carbon black by pyrolyzing and grinding such rubber with heated balls for a sufficient length of time to vaporize and depolymerize the hydrocarbons and to produce a solid char material having a very fine particle size, said char material being free of nondecomposed rubber and coke and having a benzene discoloration number of greater than 70% and preferably 90%, and the related method of making the composition. If the rubber also contains fiberglass and metal, the solid material produced in the pyrolyzing and grinding step will contain fiberglass and metal. The fiberglass and metal are separated from the solid char particles by mechanical means using no caustic, acid or organic solvents. The resulting char may be used, among other things, as a substitute for carbon black in the production of various products such as tires.
Inventors
- 👤 Charles E. Haberman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:45
CPC Classifications
C; C10; C10B; C10B53/00; C10B53/07; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/482; C10B49/00; C10B49/16; C01; C01P; C01P2004/00; C01P2004/60; C01P2004/62; Y; Y02; Y02P; Y02P20/00; Y02P20/141; Y02P20/143
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
117 words
A char material produced from rubber containing polymeric hydrocarbons and carbon black by simultaneously pyrolyzing and grinding said rubber in the absence of oxygen with heat carrying solids having a sufficient temperature and for a sufficient length of time to volatilize and depolymerize the hydrocarbons and produce a solid char material of very fine particle size, separating said volatilized and depolymerized hydrocarbons from said char particles, and cooling said char particles in the absence of oxygen to a temperature of less than 400° F., said cooled char particles being free of oxidation, substantially free of non-decomposed rubber and coke, having not been contacted with acid or bases, and having a benzene discoloration No. of greater than 70%.
Claim 2
Dependent Claim
117 words
A char material produced from rubber containing polymeric hydrocarbons and carbon black by simultaneously pyrolyzing and grinding said rubber in the absence of oxygen with heat carrying solids having a sufficient temperature and for a sufficient length of time to volatilize and depolymerize the hydrocarbons and produce a solid char material of very fine particle size, separating said volatilized and depolymerized hydrocarbons from said char particles, and cooling said char particles in the absence of oxygen to a temperature of less than 400° F., said cooled char particles being free of oxidation, substantially free of non-decomposed rubber and coke, having not been contacted with acid or bases, and having a benzene discoloration No. of greater than 70%.
Claim 3
Dependent Claim
15 words
A char according to claim 1 wherein said char is in the form of pellets.
Claim 4
Dependent Claim
17 words
A char according to claim 1 wherein the char particles are less than one micron in size.
Claim 5
Dependent Claim
18 words
A char according to claim 1 wherein the average char particle size is about 50 millimicrons or less.
Claim 6
Dependent Claim
177 words
A char produced from rubber containing polymeric hydrocarbons, carbon black, fiberglass and steel, by simultaneously pyrolyzing and grinding said rubber in the absence of oxygen with heat carrying solids having a sufficient temperature and for a sufficient length of time to volatilize and depolymerize the hydrocarbons and produce solid material comprising a solid char material of very fine particles, steel filaments and fiberglass filaments, separating said volatilized and depolymerized hydrocarbons from said solid material and cooling said solid material in the absence of oxygen to a temperature of less than 400° F., thereby preventing oxidation of said char material, separating the steel from said solid material by passing said solid material through a magnetic field, and removing the fiberglass filaments from said solid material by passing said solid material over a screen of sufficient mesh size to separate the char and the fiberglass filaments, said cooled char material being free of oxidation, substantially free of non-decomposed rubber and coke, having not been contacted with acid or bases and having a benzene discoloration No. of greater than 70%.
Claim 7
Dependent Claim
177 words
A char produced from rubber containing polymeric hydrocarbons, carbon black, fiberglass and steel, by simultaneously pyrolyzing and grinding said rubber in the absence of oxygen with heat carrying solids having a sufficient temperature and for a sufficient length of time to volatilize and depolymerize the hydrocarbons and produce solid material comprising a solid char material of very fine particles, steel filaments and fiberglass filaments, separating said volatilized and depolymerized hydrocarbons from said solid material and cooling said solid material in the absence of oxygen to a temperature of less than 400° F., thereby preventing oxidation of said char material, separating the steel from said solid material by passing said solid material through a magnetic field, and removing the fiberglass filaments from said solid material by passing said solid material over a screen of sufficient mesh size to separate the char and the fiberglass filaments, said cooled char material being free of oxidation, substantially free of non-decomposed rubber and coke, having not been contacted with acid or bases and having a benzene discoloration No. of greater than 70%.
Claim 8
Dependent Claim
15 words
A char according to claim 5 wherein said char is in the form of pellets.
Claim 9
Dependent Claim
19 words
A char according to claim 5 wherein the average size of the char particles is less than one micron.
Claim 10
Dependent Claim
19 words
A char according to claim 5 wherein the average size of the char particles is 50 millimicrons or less.
Claim 11
Independent Claim
140 words
A method for producing useful products from rubber containing polymeric hydrocarbons and carbon black which comprises simultaneously pyrolyzing and grinding the rubber in the absence of oxygen by contacting said rubber with heat carrying solids for a sufficient length of time to volatilize and depolymerize the hydrocarbons and produce a solid char material of very fine particle size and hydrocarbon vapors; separating the solid char material and the heat carrying solids from the hydrocarbon vapors; separating the heat carrying solids from the solid char material and cooling said char material to less than 400° F. in the absence of air in order to prevent oxidation of the char; said char particles being substantially free of oxidation, non-decomposed rubber, and coke, and having a benzene discoloration No. of greater than 70%; and reheating the heat carrying solids in said heating zone.
Claim 12
Independent Claim
140 words
A method for producing useful products from rubber containing polymeric hydrocarbons and carbon black which comprises simultaneously pyrolyzing and grinding the rubber in the absence of oxygen by contacting said rubber with heat carrying solids for a sufficient length of time to volatilize and depolymerize the hydrocarbons and produce a solid char material of very fine particle size and hydrocarbon vapors; separating the solid char material and the heat carrying solids from the hydrocarbon vapors; separating the heat carrying solids from the solid char material and cooling said char material to less than 400° F. in the absence of air in order to prevent oxidation of the char; said char particles being substantially free of oxidation, non-decomposed rubber, and coke, and having a benzene discoloration No. of greater than 70%; and reheating the heat carrying solids in said heating zone.
Claim 13
Dependent Claim
24 words
A method according to claim 9 wherein the rubber is dried before pyrolysis to remove substantially all of the surface moisture on the rubber.
Claim 14
Dependent Claim
59 words
A method according to claim 9 wherein the rubber contains fiberglass and steel, and the char composition produced contains fiberglass and steel, including the further step of separating the char from the fiberglass and metal by passing said composition through a magnetic field to remove the steel and over a screen of sufficient mesh size to remove the fiberglass.
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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) | 1980-07-25 | 1981-01-24 | 1981-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-25 | 1985-01-24 | 1985-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-25 | 1989-01-24 | 1989-07-26 | $7700.00 | Window Closed / Lapsed |