Reducing aluminosilicate scale in the bayer process

摘要

The invention provides a method of inhibiting the accumulation of DSP scale in the liquor circuit of Bayer process equipment. The method includes adding one or more particular silane based small molecules to the liquor fluid circuit. These scale inhibitors reduce DSP scale formation and thereby increase fluid throughput, increase the amount of time Bayer process equipment can be operational and reduce the need for expensive and dangerous acid washes of Bayer process equipment. As a result, the invention provides a significant reduction in the total cost of operating a Bayer process.

主权项

1. A method for the reduction of aluminosilicate containing scale in a Bayer process comprising:
adding to a Bayer process stream an aluminosilicate scale inhibiting amount of a composition comprising a non-polymeric continuous or semi-batch reaction product of hexane diamine, glycidoxypropyltrimethoxysilane, and 2-ethylhexyl glycidyl ether.