skip to main content

Title: Preparation of reactive beta-dicalcium silicate

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.
Authors:
; ;
Publication Date:
OSTI Identifier:
6840516
DOE Contract Number:
EY-76-C-02-0016
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; CALCIUM SILICATES; CHEMICAL PREPARATION; FLUE GAS; DESULFURIZATION; POLLUTION CONTROL EQUIPMENT; MATERIALS; BY-PRODUCTS; CALCIUM SULFATES; CALCIUM SULFIDES; CARBON; CARBON DIOXIDE; CARBON MONOXIDE; HYDROGEN; METHANE; NITROGEN; PARTICLES; REACTIVITY; SILICA; SORPTION; ALKALINE EARTH METAL COMPOUNDS; ALKANES; CALCIUM COMPOUNDS; CARBON COMPOUNDS; CARBON OXIDES; CHALCOGENIDES; CHEMICAL REACTIONS; ELEMENTS; EQUIPMENT; GASEOUS WASTES; HYDROCARBONS; MINERALS; NONMETALS; ORGANIC COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; SILICATES; SILICON COMPOUNDS; SILICON OXIDES; SULFATES; SULFIDES; SULFUR COMPOUNDS; SYNTHESIS; WASTES 424000* -- Engineering-- Pollution Control Equipment-- (1980-1989)