Patent US3728437A successfully refreshed from Google Patents.
US3728437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbon black production
Assignee: Phillips Petroleum Co
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Filing: 1971-02-16
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Granted: 1973-04-17
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Expires: 1991-02-16
Abstract
Abstract Method and apparatus for producing carbon black in which a first mass of hot combustion gases containing hydrocarbon feed is passed centrally and counter currently to a second mass of hot helically-flowing combustion gases whereby the hydrocarbon feed is pyrolytically decomposed to carbon black which is removed from the downstream end of the reactor and a portion of the hot combustion gases substantially free of carbon black are removed through ports in the upstream end of the reactor.
Inventors
- 👤 J Vanderveen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:13
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/50; B; B01; B01J; B01J19/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
38 words
The method of claim 1 in which d is equal to D/2, p is equal to D/2, l is equal to D, r is equal to 3D/2, n is equal to D/2 and m is equal to D.
Claim 2
Dependent Claim
33 words
The method of claim 1 in which the hot combustion gases of said first reactant mass comprise about 5 to about 35 percent of the total hot combustion gas flowing through said reactor.
Claim 3
Dependent Claim
35 words
The method of claim 1 in which a principal portion of the hot combustion gases comprising said second reactant mass is removed from said reactor upstream of the locus of introduction of said hydrocarbon feed.
Claim 4
Dependent Claim
34 words
The method of claim 1 in which the hot combustion gases removed from said reactor upstream of the locus of introduction of said hydrocarbon feed are removed from an enlarged section of said reactor.
Claim 5
Dependent Claim
277 words
A carbon black reactor which comprises: a. an elongated cylindrical housing closed at its ends and having a substantially uniform diameter D; b. conduit means for the introduction of hydrocarbon feed opening into said housing proximate its upstream end; c. conduit means for removing carbon black opening from said housing at its downstream end, said conduit means having a diameter d; d. conduit means for the removal of hot combustion gases opening from said housing at a distance n upstream from the locus of discharge of said conduit means for the introduction of hydrocarbon feed; e. an enclosed section in peripheral communication with said housing and having a diameter greater than D and having a length l and positioned proximate said downstream end of said housing upstream of said conduit means for removing carbon black, the inner upstream wall of said section being positioned a distance m from the locus of discharge of said conduit means for the introduction of hydrocarbon feed, the inner downstream wall of said section being positioned a distance p from said conduit means for removing carbon black; f. conduit means for the introduction of hot combustion gases opening into said enclosed section at a distance r from the longitudinal axis of said housing, in which Reactor: d has a value of from about D/4 to about 3D/4; n has a value of from about D/2 to about 4D; m has a value of from about D to about 8D; l has a value of from about D/4 to about 2D; r has a value of from 2D/3 to about 4D; and, p has a value of from about D/2 to about 4D.
Claim 6
Dependent Claim
49 words
The reactor of claim 6 in which d has a value of about D/2, p has a value of about D/2, l has a value of about D, r has a value of about 3D/2, n has a value of about D/2, and m has a value of D.
Claim 7
Dependent Claim
25 words
The reactor of claim 6 in which said conduit means for the removal of hot combustion gases is adapted to discharge tangentially from said housing.
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) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |