Preparation of reactive beta-dicalcium silicate

Shen, Ming-Shing; Chen, James M; Yang, Ralph T

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Title: Preparation of reactive beta-dicalcium silicate

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Abstract

This invention relates to the preparation of fine particles of reactive beta-dicalcium silicate by means of a solid state process which comprises firing a mixture of calcium sulfate, silica and a reducing additive selected from the group consisting of calcium sulfide, carbon, carbon monoxide, methane and hydrogen, at a temperature of about 850.degree.-1000.degree. C. A carrier gas such as nitrogen or carbon dioxide may also be added, if desired. A high concentration of sulfur dioxide is a by-product of this process.

Inventors:

Shen, Ming-Shing ^[1]; Chen, James M ^[2]; Yang, Ralph T ^[3]

Laramie, WY, NJ
Rahway, NJ
Amherst, NY

Issue Date:: Fri Jan 01 00:00:00 EST 1982

Research Org.:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

OSTI Identifier:: 864130

Patent Number(s):: 4314980

Assignee:: United States of America as represented by United States (Washington, DC)

Patent Classifications (CPCs):: C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01B - NON-METALLIC ELEMENTS

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C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01B - NON-METALLIC ELEMENTS
C01B33/24 - Alkaline-earth metal silicates

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DOE Contract Number:: EY-76-C-02-0016

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: preparation; reactive; beta-dicalcium; silicate; relates; fine; particles; means; solid; process; comprises; firing; mixture; calcium; sulfate; silica; reducing; additive; selected; consisting; sulfide; carbon; monoxide; methane; hydrogen; temperature; 850; degree; -1000; carrier; gas; nitrogen; dioxide; added; desired; concentration; sulfur; by-product; additive selected; fine particles; carrier gas; carbon dioxide; carbon monoxide; sulfur dioxide; calcium sulfate; calcium sulfide; fine particle; reactive beta-dicalcium; calcium silicate; beta-dicalcium silicate; /423/

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                    Shen, Ming-Shing, Chen, James M, and Yang, Ralph T. Preparation of reactive beta-dicalcium silicate.  United States: N. p., 1982. 
        Web.

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                    Shen, Ming-Shing, Chen, James M, & Yang, Ralph T. Preparation of reactive beta-dicalcium silicate.  United States.

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                    Shen, Ming-Shing, Chen, James M, and Yang, Ralph T. Fri .  
        "Preparation of reactive beta-dicalcium silicate".  United States.  https://www.osti.gov/servlets/purl/864130.

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@article{osti_864130,

  title        = {Preparation of reactive beta-dicalcium silicate},

  author       = {Shen, Ming-Shing and Chen, James M and Yang, Ralph T},

  abstractNote = {This invention relates to the preparation of fine particles of reactive beta-dicalcium silicate by means of a solid state process which comprises firing a mixture of calcium sulfate, silica and a reducing additive selected from the group consisting of calcium sulfide, carbon, carbon monoxide, methane and hydrogen, at a temperature of about 850.degree.-1000.degree. C. A carrier gas such as nitrogen or carbon dioxide may also be added, if desired. A high concentration of sulfur dioxide is a by-product of this process.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Fri Jan 01 00:00:00 EST 1982},

  month        = {Fri Jan 01 00:00:00 EST 1982}

}

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