Gulf Research & Development Company

Edgar L McGinnis

Norman L Carr

The rate of filtration of a coal liquid slurry is increased by adding polyisobutylene and an alcohol containing 2 to 10 carbon atoms to the slurry prior to filtration or by adding the alcohol to the slurry and washing a precoat cake of filter aid with an oil solution of polyisobutylene prior to filtration. Although the polyisobutylene and the alcohol each provides a filtration rate improving effect when used alone, a synergistic improvement in filtration rate is achieved by their combined use.

Filtration of a coal liquid slurry using polyisobutylene and an alcohol

The rate of filtration of a coal liquid slurry is increased by adding an alkylmethacrylate copolymer and an alcohol containing 2 to 10 carbon atoms to the slurry prior to filtration or by adding the alcohol to the slurry and washing a precoat cake of filter aid with an oil solution of an alkylmethacrylate copolymer prior to filtration. Although the alkylmethacrylate copolymer and the alcohol each provide a filter rate improving effect when used alone, a synergistic improvement in filtration rate is achieved by their combined use.

Filtration of a coal liquid slurry using an alkylmethacrylate copolymer

The rate of filtration of a coal liquid slurry is increased by adding an alkylmethacrylate copolymer to the slurry prior to filtration or by washing a precoat cake of filter aid with an oil solution of the alkylmethacrylate copolymer prior to filtration.

The rate of filtration of a coal liquid slurry is increased by adding an ethylene vinyl acetate copolymer and an alcohol containing 2 to 10 carbon atoms to the slurry prior to filtration or by adding the alcohol to the slurry and washing a precoat cake of filter aid with an oil solution of ethylene vinyl acetate copolymer prior to filtration. Although the ethylene vinyl acetate copolymer and the alcohol each provides a filter rate improving effect when used alone, a synergistic improvement in filtration rate is achieved by their combined use.

Filtration of a coal liquid slurry using an ethylene vinyl acetate

The rate of filtration of a coal liquid slurry is increased by adding ethylene vinyl acetate copolymer to the slurry prior to filtration or by washing a precoat cake of filter aid with an oil solution of ethylene vinyl acetate copolymer prior to filtration.

The rate of filtration of a coal liquid slurry is increased by adding polyisobutylene to the slurry prior to filtration or by washing a precoat cake of filter aid with an oil solution of polyisobutylene prior to filtration.

Filtration of a coal liquid slurry using polyisobutylene

The rate of separation of suspended mineral particles from a coal liquid is increased by adding a calcium salt, such as calcium carbonate, to the coal liquid. The increase in the separation rate is achieved even though the suspended coal mineral particles naturally contain a calcium salt.

Process for separating solids from coal liquids

The rate of separation of suspended mineral particles from a coal liquid is increased by adding a mixture of a hydrocarbonaceous oil and a calcium salt, such as calcium carbonate, to the coal liquid. The increase in the separation rate is achieved even though the coal mineral particles naturally contain a calcium salt. The premixing of the calcium salt with hydrocarbonaceous oil considerably enhances the separation rate as compared to the addition of the calcium salt alone even when the hydrocarbonaceous oil is a distillate fraction which is derived from the coal liquid itself.

Method for separating solids from coal liquids

Ash-containing solids are separated from coal liquid by adding a blend comprising alcohol and a light oil fraction to said coal liquid, followed by a solids-liquid separation step.

Separation of solids from coal liquids with an additive blend

Ash-containing solids are separated from coal liquid by mixing alcohol with said coal liquid, followed by a solids-liquid separation step.

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Gibsonia, PA, United States of America

Edgar L McGinnis