Methods for removing amine contaminants from equipment used in the production of polyether polyols

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United States of America Patent

PATENT NO 11529657
APP PUB NO 20220288652A1
SERIAL NO

17196075

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Abstract

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Methods of removing amine contaminants from equipment used in the production of polyether polyols. These methods include: (a) contacting the equipment with an aqueous solution of a first acid; (b) discharging the aqueous solution of the first acid from the equipment; (c) contacting the equipment with an aqueous solution of an acidic metal conditioner; (d) discharging the aqueous solution of the acidic metal conditioner from the equipment; (e) contacting the equipment with an aqueous solution of an alkali metal hydroxide; and (f) discharging the aqueous solution of the alkali metal hydroxide from the equipment.

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Patent Owner(s)

  • COVESTRO LLC

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Barksby, Nigel Moon Township, US 35 346
Caputo, Jenna L Monroeville, US 3 1
Christman,, II Mark A Woodsfield, US 2 1
Starkey, Charles D New Martinsville, US 1 0
Wagner, Daniel R Pittsburgh, US 16 110

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