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US 4,394,273 AGranted
Defoamers for aqueous liquids containing soluble zinc salts
AssigneeNL Industries, Inc.
InventorMichael H. Hoff
Life of this patent
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Abstract
2,6,8-Trimethyl-4-nonanone and the triethoxylated derivative of 2,6,8-Trimethyl-4-nonanol synergistically combine to reduce the foaming of heavy brines containing zinc bromide and one or more soluble salts from the group calcium chloride and calcium bromide.
Claims9
A defoaming composition comprising a mixture of 2,6,8-trimethyl-4-nonanone and the triethoxylated derivative of 2,6,8-trimethyl-4-nonanol wherein the volume ratio of 2,6,8-trimethyl-4-nonanone to the triethoxylated derivative of 2,6,8-trimethyl-4-nonanol is in the range from about 9:1 to about 1:9.
Dependencies are inferred from the claim text.