Henkel Corporation

Geo Specialty Chemicals, Inc.

John J Palmer

David I Devore

Jose M Rodriguez

Marie-Esther Saint Victor

Vincent T Stine

Barbara Balos Bowker

Anthony B Cook

Zhentaro He

Lynn A Lavender

Richard Gerke

Mary L Lightsey

The efficiency by which pulp cooking liquor components penetrate the wood and enable lignin and resins to be removed from the cellulosic materials is increased by contacting wood chips and the like with a liquid mixture comprised of white liquor containing at least one surfactant selected from the group consisting of a polymethylalkylsiloxane; a co- and terpolymer of silicone and a polyhydric alcohol; an alkoxylated aryl phosphate; an alkoxylated branched alkyl phosphate; an alkoxylated branched alcohol; an alkyl polyglycoside, an alkoxylated alkyl polyglycoside; a mixture of alkali metal salts of alkyl aromatic sulfate, a sulfosuccinate and a silicone; and combinations thereof; for a residence time effective to extract resinous components without substantial degradation of cellulose and thereafter heating at least a portion of the resulting mixture and wood chips.

Composition containing a polymethylalkyl siloxane for enhancing white

A defoaming agent composition containing: (a) from about 10 to about 25% by weight of a microcrystalline wax having a melting point of from about 75 to about 95.degree. C.; and (b) from about 1 to about 5% by weight of an emulsifier selected from the group consisting of alkoxylated sorbitan mono/di/trioleate, alkoxylated sorbitol hexaoleate, sorbitan mono/di/trioleate, polyethylene glycol dioleate, polyethylene glycol distearate, block copolymers of ethylene oxide and propylene oxide, and mixtures thereof; and (c) remainder, water, all weights being based on the weight of the composition.

Use of microcrystalline wax and low foaming emulsifiers as defoamers

Process for enhancing white liquor penetration into wood chips by

A defoamer composition made from the reaction product of an epoxide containing composition selected from epoxide fatty acids, epoxide vegetable oils and mixtures thereof and at least one secondary compound selected from the group consisting of fatty acids and alkoxylated derivatives thereof, alkoxylated polyols, alcohols, alkoxylated alcohols, alkylphenols, alkoxylated alkylphenols, alkylamides, alkoxylated alkylamides, acetylenic glycols, alkoxylated acetylenic glycols, polybasic acids, alkylene oxides, organo silicones and polymers thereof, and methods of using the same especially for defoaming black liquor produced in the pulp and paper industry.

Defoamer composition and method of using the same

An apparatus and method is provided wherein the foam inhibiting effectiveness of defoaming and antifoaming additives on various types of foamable liquid mediums is measured. A single generally cylindrical foam cell having openings at both ends is provided wherein an interchangeable foam cell insert having varied geometry is longitudinally disposed within the foam cell. The foam cell insert is provided with a plurality of centralizer walls extending into the foam cell with an agitator member being carried by the centralizer walls. Foamable liquid medium is introduced into the foam cell and recirculated therethrough to form a dynamic fluid-flow system. As the liquid medium passes through both the foam cell and the foam cell insert, it comes into contact with the agitator member carried by the centralizer walls of the foam cell insert forming foam which accumulates in the foam cell. After a sufficient amount of foam is formed, a defoaming or antifoaming agent is introduced into the foam cell, and its effect on the level of foam present in the foam cell is measured. The interchangeable foam cell inserts are of varying lengths and carry varyingly configured agitator members, so that depending on whether a high or low foaming liquid medium is introduced, an appropriate foam cell insert may be chosen and inserted into the foam cell. The interchangeable foam cell inserts allow for a single foam cell to be used for measuring purposes thus decreasing the cost and potential down-time associated with such testing.

Defoamer testing apparatus

Growing community of inventors

Stanfield, NC, United States of America

John J Palmer