Preparation of reactive beta-dicalcium silicate

Patent · Thu Feb 28 04:00:00 EST 1980

OSTI ID:6840516

Shen, M S; Chen, J M; Yang, R T

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 to 1000/sup 0/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.

• DOE Contract Number: EY-76-C-02-0016
• Assignee: Dept. of Energy
• Patent Number(s): None
• OSTI ID: 6840516
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
424000* -- Engineering-- Pollution Control Equipment-- (1980-1989)
ALKALINE EARTH METAL COMPOUNDS
ALKANES
BY-PRODUCTS
CALCIUM COMPOUNDS
CALCIUM SILICATES
CALCIUM SULFATES
CALCIUM SULFIDES
CARBON
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTIONS
DESULFURIZATION
ELEMENTS
EQUIPMENT
FLUE GAS
GASEOUS WASTES
HYDROCARBONS
HYDROGEN
MATERIALS
METHANE
MINERALS
NITROGEN
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PARTICLES
POLLUTION CONTROL EQUIPMENT
REACTIVITY
SILICA
SILICATES
SILICON COMPOUNDS
SILICON OXIDES
SORPTION
SULFATES
SULFIDES
SULFUR COMPOUNDS
SYNTHESIS
WASTES