Foam control composition and method for controlling foam in aqueous systems

A technology of water system and composition, applied in defoamer composition, about 70% of straight-chain primary alcohol contains C20-C26 straight-chain primary alcohol, even more preferably, in the field of foam control composition, which can solve the problem of reducing elongation Strength, affecting paper formation, production efficiency decline, etc., to achieve the effect of improving control and improving the effect of foam control

Inactive Publication Date: 2003-07-16
HERCULES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Enriched air bubbles can be a problem due to the inhibitory effect on the flow of wash liquor through the fabric, which in turn causes a decrease in production efficiency
We also know that enriched air bubbles will affect the formation of the paper and reduce its tensile strength

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0052] The invention is illustrated by the following non-limiting examples, which are provided for the purpose of illustration and should not be construed as limiting the scope of the invention. All parts and percentages in the examples are by weight unless otherwise stated.

[0053] Example Compositions 1-32

[0054] Table 1: Antifoam Composition

Examples

No

Water (wt%)

straight chain alcohol

compound

straight chain alcohol

mixture

(%)

fatty alcohol alkoxy

base compound

fatty alkanes

Oxide

(%)

Anion table

surfactant

Anion table

surfactant

(%)

Non-ionic watch

surfactant

Non-ionic watch

surfactant

(%)

branched alcohol

Branched Alcohol(%)

Xanthan Gum (%)

1

62

Alfol 20+

30

Surfonic LF-

50

5

Nacconol

90G

0.5

Tergitol

15-S-9

1.6

Isofol20

1.1

...

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Abstract

The invention relates to methods and compositions for controlling foam, i.e., defoaming or inhibiting the formation thereof, in aqueous systems including wastewater systems and in aqueous industrial process systems by adding primary alcohol, alcohol alkoxylate, and emulsifier to the aqueous system, such as in a stable aqueous composition.

Description

Background of the invention [0001] The present invention relates to foam control compositions, their preparation and their use in aqueous media. In particular, the present invention relates to a defoamer composition particularly useful for controlling foam problems encountered in low to moderate temperature pulp and paper mill process water and wastewater streams. [0002] Many wastewater treatment systems and industrial processes suffer from problems due to foams that form when wastewater or process water flows through the system or process. Foaming can occur in any aqueous stream that contains contaminants or additives that lower the surface tension of the stream. These materials are usually organic compounds. They can be derived from natural compounds (such as lignin, humic acids, tannins), waste compounds, water treatment compounds, process treatment compounds, detergents, cleaning agents, products or by-products of industrial processes, microbial by-products, etc. The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D19/04D21H17/06D21H21/12
CPCD21H21/12C02F2303/12
Inventor G·C·小沃特里克
Owner HERCULES INC
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