Patent ID: 7326400
Filing Date: 2008-02-05
Classification: C01F,C01P,C04B

Abstract:
1. A method of slaking high sulfate containing quicklime in a slaking operation to form fine particles of calcium hydroxide, the method comprising the steps of: providing a source of quicklime and a source of slaking water; slaking the quicklime with the slaking water to form calcium hydroxide particles; wherein a complexing agent is pre-mixed with the quicklime or with the slaking water before the slaking step, the complexing agent being effective to tie up available soluble sulfate ions present in the quicklime upon addition of the quicklime to the slaking water and thereby causing less agglomeration of the calcium hydroxide particles in the slaking operation as compared to the same process in which the complexing is added after the slaking step.