Method for removing undesired components from coal

Abel, W A; Brabets, R I; Massey, L G

Title: Method for removing undesired components from coal

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Abstract

A process is disclosed for treating a fluid-permeable hydrocarbonaceous solid, such as coal, containing an admixture of hydrocarbonaceous components and mineral and sulfur components, to separate the solid into a hydrocarbonaceous enriched fraction and a mineral and sulfur enriched fraction. The process involves comminuting the solid in the presence of a low molecular weight alcohol under conditions sufficient to substantially scission the hydrocarbonaceous components from the mineral and sulfur components and to selectively comminute the hydrocarbonaceous components. The resultant product is thereafter separated into the enriched hydrocarbonaceous fraction and the enriched mineral and sulfur fraction. In a preferred embodiment of the process, the hydrocarbonaceous solid is mixed with a low molecular weight alcohol, such as methanol, to form a slurry. The slurry is then heated and pressurized to a temperature and pressure above the critical temperature and pressure of the alcohol. In particularly preferred form, the slurry is heated for a sufficient length of time to form: (1) a dissolved portion of the hydrocarbonaceous components in alcohol; (2) an undissolved suspended portion of hydrocarbonaceous material saturated with the alcohol; and (3) a discrete undissolved suspended portion of the mineral components. The superheated slurry is thereafter expanded, preferably by a substantiallymore »« less

Inventors:: Abel, W A; Brabets, R I; Massey, L G

Publication Date:: Tue Dec 21 00:00:00 EST 1982

OSTI Identifier:: 6758038

Patent Number(s):: US 4364740

Assignee:: Cng Research Co

Resource Type:: Patent

Resource Relation:: Patent File Date: Filed date 7 May 1981; Other Information: PAT-APPL-261470

Country of Publication:: United States

Language:: English

Subject:: 01 COAL, LIGNITE, AND PEAT; COAL; COMMINUTION; DESULFURIZATION; EXPANSION; METHANOL; PRESSURIZING; REFINING; SEPARATION PROCESSES; SLURRIES; ALCOHOLS; CARBONACEOUS MATERIALS; CHEMICAL REACTIONS; DISPERSIONS; ENERGY SOURCES; FOSSIL FUELS; FUELS; HYDROXY COMPOUNDS; MATERIALS; MIXTURES; ORGANIC COMPOUNDS; PROCESSING; SUSPENSIONS; 010402* - Coal, Lignite, & Peat- Purification & Upgrading

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                    Abel, W A, Brabets, R I, and Massey, L G. Method for removing undesired components from coal.  United States: N. p., 1982. 
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                    Abel, W A, Brabets, R I, & Massey, L G. Method for removing undesired components from coal.  United States.

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                    Abel, W A, Brabets, R I, and Massey, L G. 1982.  
        "Method for removing undesired components from coal".  United States.

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@article{osti_6758038,

  title        = {Method for removing undesired components from coal},

  author       = {Abel, W A and Brabets, R I and Massey, L G},

  abstractNote = {A process is disclosed for treating a fluid-permeable hydrocarbonaceous solid, such as coal, containing an admixture of hydrocarbonaceous components and mineral and sulfur components, to separate the solid into a hydrocarbonaceous enriched fraction and a mineral and sulfur enriched fraction. The process involves comminuting the solid in the presence of a low molecular weight alcohol under conditions sufficient to substantially scission the hydrocarbonaceous components from the mineral and sulfur components and to selectively comminute the hydrocarbonaceous components. The resultant product is thereafter separated into the enriched hydrocarbonaceous fraction and the enriched mineral and sulfur fraction. In a preferred embodiment of the process, the hydrocarbonaceous solid is mixed with a low molecular weight alcohol, such as methanol, to form a slurry. The slurry is then heated and pressurized to a temperature and pressure above the critical temperature and pressure of the alcohol. In particularly preferred form, the slurry is heated for a sufficient length of time to form: (1) a dissolved portion of the hydrocarbonaceous components in alcohol; (2) an undissolved suspended portion of hydrocarbonaceous material saturated with the alcohol; and (3) a discrete undissolved suspended portion of the mineral components. The superheated slurry is thereafter expanded, preferably by a substantially instantaneous adiabatic expansion, most preferably in the presence of a sulfur scavenger compound. The result is a selective precipitation, comminution and production of substantially mineral and sulfur free, ultra-fine hydrocarbonaceous particles in admixture with discrete relatively larger mineral particles.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/6758038},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Tue Dec 21 00:00:00 EST 1982},

  month        = {Tue Dec 21 00:00:00 EST 1982}

}

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