Betzdearborn, Inc.

Betz Laboratories, Inc.

Hercules Corporation

Betz Panerchem, Inc.

Daniel L Michalopoulos

J Barry Wright

Duy T Nguyen

Fu Chen

Jacqueline K Pease

Daniel J Barnett

Catherine S Dixon

Compositions and methods for inhibiting the deposition of organic contaminants from pulp in pulp and papermaking systems are disclosed. The methods add to the pulp or to the deposition prone surface of the papermaking systems a composition comprising a dinonyl sulfosuccinate anionic surfactant which is used in systems containing multivalent cations, preferably calcium ions. The methods also utilize a blend of dioctyl sulfosuccinate and didecyl sulfosuccinate anionic surfactants.

Compositions and method for inhibiting organic contaminant deposition in

Methods for inhibiting organic contaminant deposition in pulp and

A treatment for enhancing the activity of biocidal compounds to control the growth of microbes in an aqueous system is disclosed, which comprises adding to said compounds an effective amount of an alkylsulfosuccinate surfactant.

Method for enhancing biocidal activity

A method for inhibiting the microbial adhesion on surfaces in contact with an aqueous system is disclosed, which comprises adding to the system a treatment comprising an alkylsulfosuccinate surfactant.

Method for inhibiting microbial adhesion on surfaces

A composition and method for inhibiting the deposition of white pitch on the surfaces of papermaking equipment during the processing of recycled coated broke. The process involves adding to the coated broke during repulping a composition having a first compound of a tetrafunctional alkoxylated diamine having the structure: ##STR1## wherein R.sub.1 and R.sub.2 are ethylene oxide or propylene oxide and R.sub.1 and R.sub.2 are not the same, and a second compound selected from the group consisting of a phosphate, phosphonate and phosphonic acid.

Method for effectively breaking up latex-coated paper during pulping to

Methods of controlling the formation of calcium oxalate in aqueous systems are disclosed. The methods comprise adding from about 0.1 to 500 ppm of a water soluble (meth)acrylic acid/allyl ether copolymer to the desired water system. The methods are especially well adapted for use in pulping and paper making systems wherein calcium oxalate is often encountered as a troublesome scale forming compound.

Method for calcium oxalate scale control

This invention relates to a process for inhibiting white pitch deposition in felts of a papermaking system including adding to the felts an effective inhibiting amount of an organic, anionic polyelectrolyte. The molecular weight of the polyelectrolyte is preferably from about 1,000 to 100,000. The polyelectrolyte is selected from the group consisting of polyacrylic acid, polmethacrylic acid, acrylic acid/polyethylene glycol allyl ether copolymers, methacrylic acid/polyethylene glycol allyl ether copolymers, acrylic acid/1-allyloxy-2-hydroxypropane sulfonic acid copolymers. The use of these polyelectrolytes in combination with surfactants provides an especially effective white pitch inhibiting and total felt conditioning process when applied to the felt.

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Jacksonville, FL, United States of America

Daniel L Michalopoulos