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Preparation of reactive beta-dicalcium silicate

Patent ·
OSTI ID:5318834
; ;
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 degrees to 1000 degrees 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.
Assignee:
Dept. Of Energy
Patent Number(s):
US 4314980
OSTI ID:
5318834
Country of Publication:
United States
Language:
English

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Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
42 ENGINEERING
424000 -- Engineering-- Pollution Control Equipment-- (1980-1989)
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM SILICATES
CALCIUM SULFATES
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTIONS
DESULFURIZATION
MINERALS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PARTICLES
SILICA
SILICATES
SILICON COMPOUNDS
SILICON OXIDES
SORPTIVE PROPERTIES
SULFATES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
SURFACE PROPERTIES
SYNTHESIS
VERY HIGH TEMPERATURE