US3989804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbon black method
Assignee: Phillips Petroleum Co
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Filing: 1974-11-18
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Granted: 1976-11-02
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Expires: 1994-11-18
Abstract
Abstract A method and apparatus for producing carbon black in which a first reactant mass is formed and thoroughly mixed and passed axially through the reactor, a second mass of hot combustion gases being passed helically to the axially flowing mass.
Inventors
- 👤 John W. Vanderveen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:38
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/50; C01; C01P; C01P2006/00; C01P2006/12; C01P2006/19
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
137 words
A process for producing carbon black comprising: a. introducing reactant materials comprising hydrocarbon feed and fuel gas axially into a first section of a carbon black reactor with an oxidant introduced in radial flow to produce a first reactant mass; b. passing said reactants through a mixing zone producing a nonrotating first reactant mass flowing longitudinally in the reactor; c. passing the non-rotating reactant mass into a second section of the carbon black reactor with addition of a tangential flow of air and an axial flow of fuel gas to produce a total reaction mass comprising a non-rotating reactant mass flowing longitudinally in the reactor surrounded by a helically flowing mass of hot combustion gases; d. passing the total reactant mass into a pyrolytic reaction section to produce carbon black; and e. recovering the carbon black produced.
Claim 2
Dependent Claim
137 words
A process for producing carbon black comprising: a. introducing reactant materials comprising hydrocarbon feed and fuel gas axially into a first section of a carbon black reactor with an oxidant introduced in radial flow to produce a first reactant mass; b. passing said reactants through a mixing zone producing a nonrotating first reactant mass flowing longitudinally in the reactor; c. passing the non-rotating reactant mass into a second section of the carbon black reactor with addition of a tangential flow of air and an axial flow of fuel gas to produce a total reaction mass comprising a non-rotating reactant mass flowing longitudinally in the reactor surrounded by a helically flowing mass of hot combustion gases; d. passing the total reactant mass into a pyrolytic reaction section to produce carbon black; and e. recovering the carbon black produced.
Claim 3
Dependent Claim
32 words
The process of claim 1 wherein from about 40 percent to about 60 percent by volume of the total combustion gases is supplied to the first section of the carbon black reactor.
Claim 4
Dependent Claim
25 words
The process of claim 1 wherein the first reactant mass is passed through a mixing zone comprising a venturi producing a non-rotating reactant mass thereby.
References Cited (Backward Citations)
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US3410660A
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US3431075A
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US3592597A
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US3877876A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-11-02 | 1980-05-03 | 1980-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-02 | 1984-05-03 | 1984-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-02 | 1988-05-03 | 1988-11-02 | $7700.00 | Window Closed / Lapsed |