Surfactant based small molecules for reducing aluminosilicate scale in the bayer process
AssigneeNalco Company
InventorsCarl Nicholas Urbani, Timothy La, John David Kildea
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Abstract
The invention provides methods and compositions for inhibiting the accumulation of DSP scale in the liquor circuit of Bayer process equipment. The method includes adding one or more GPS-surfactant 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.
Claims14
A method of reducing aluminosilicate containing scale in a Bayer process comprising:
- adding to a Bayer liquor an aluminosilicate scale reducing amount of a non-polymeric reaction product resulting from the reaction of:
- a first reaction product of a surfactant, an amine binder and an epoxide binder, wherein the surfactant is dodecyl-1,3-propanediamine;
- and
- a glycidoxyalkyltrimethoxysilane.
A method of reducing aluminosilicate containing scale in a Bayer process comprising:
- adding to a Bayer liquor an aluminosilicate scale reducing amount of a non-polymeric reaction product resulting from the reaction of:
- a surfactant;
- and
- a glycidoxyalkyltrimethoxysilane,
- wherein the non-polymeric reaction product resulting from the reaction of items further comprises a hydrophobe, an amine binder, an epoxide binder, or any combination thereof;
- and
- wherein the non-polymeric reaction product comprises molecules according to formula X or formula U:
A method of reducing aluminosilicate containing scale in a Bayer process comprising:
- adding to a Bayer liquor an aluminosilicate scale reducing amount of a non-polymeric reaction product resulting from the reaction of:
- a first reaction product of a surfactant, an amine binder and an epoxide binder;
- and
- a glycidoxyalkyltrimethoxysilane,
- wherein the non-polymeric reaction product comprises molecules according to formula BB:
A method of reducing aluminosilicate containing scale in a Bayer process comprising:
- adding to a Bayer liquor an aluminosilicate scale reducing amount of a non-polymeric reaction product resulting from the reaction of:
- a surfactant;
- and
- a glycidoxyalkyltrimethoxysilane,
- wherein the non-polymeric reaction product comprises molecules according to formula P:
Dependencies are inferred from the claim text.