Calcium Sulfate → Sulfur Dioxide

HRID 1106193Notes

Reaction equation

[OH-].[Ca+2:2].[OH-].[S:4]([O-:8])([O-:7])(=[O:6])=[O:5].[Ca+2]>>[O-2:5].[Ca+2:2].[S:4]([O-:8])([O-:7])(=[O:6])=[O:5].[Ca+2:2].[S:4](=[O:6])=[O:5]

Participants

Reactant 2

HCID 24497Calcium Sulfate

HCID 6093208Calcium Hydroxide

Product 3

HCID 1119Sulfur Dioxide

HCID 24497Calcium Sulfate

HCID 6850728Calciumoxide

Procedure

A method of increasing the sulfation capacity of particulate calcium carbonate for reaction with sulfur dioxide comprising contacting the sulfur dioxide and the calcium carbonate particles at elevated temperatures in the range of from about 700° C. to about 900° C. to form particles of calcium oxide and calcium sulfate, hydrating said particles to form particles of calcium hydroxide and calcium sulfate and dehydrating the particles of calcium hydroxide and calcium sulfate at elevated temperatures to form particles of calcium oxide and calcium sulfate capable of additional sulfation upon contact with sulfur dioxide at suitable temperatures.

Sources & evidence

ORD record: ord-d3d08d5df1dd428da973ccdb3b977ac9
Source dataset: uspto-grants-1982_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US04312280

Reaction notes

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