Auto-preseparation of carbon black
AssigneePhillips Petroleum Company
InventorPaul J. Cheng
Life of this patent
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Abstract
Aerosols such as a carbon black containing smoke are subjected to an auto-preseparation by passing the aerosol or smoke through loose particles collected and accumulated and only thereafter passing the aerosol or smoke through a separator such as a filter bag. This changes the characteristic of the aerosol in either reducing the total content of solids or increasing the average particle size of the solids in the aerosol or achieving both of these features. Thereby the load on the downstream separator and the capacity of the separator, e.g. a carbon black filter house, is substantially reduced.
Claims14
A process to produce carbon black comprising
- (a) producing a smoke containing first carbon black particles by decomposition or respectively incomplete combustion of a carbon black feedstock,
- (b) providing a mass of loose, flocculent, dry carbon black,
- (c) passing at least a portion of said smoke into said mass,
- (d) withdrawing an aerosol stream comprising the gas phase of said smoke and second carbon black particles from said mass,
- (e) introducing said aerosol into a separator to produce a carbon black product composed essentially of said second carbon black particles and an essentially carbon black free gas phase.
Process in accordance with one of the preceding claims wherein said smoke is injected into a filter house comprising a plurality of filters and one or more collecting chambers below said filters in downward direction away from said filters and into said collecting chamber wherein said smoke contacts said mass of loose, flocculent, dry carbon black.
Dependencies are inferred from the claim text.