Air Products and Chemicals, Inc.

Varin Ayala

Frank Kenneth Schweighardt

Vincent L Magnotta

John Frederick Cirucci

Webb I Bailey

Ronald C Naddeo

Virgil G Fox, Jr

Vincent Louis Magnotta

Virgil Grant Fox

Ronald Charles Naddeo

A method for white liquor oxidation in a kraft mill utilizes a two-stage selective oxidation system in which the first stage is operated to remove sulfide while the second stage is operated to oxidize a significant fraction of the remaining oxidizable sulfur compounds to sulfate. The resulting selectively oxidized white liquor products are used as alkali sources for various process steps in the mill. Optionally, white liquor can be oxidized in a single stage to convert a significant fraction of the oxidizable sulfur compounds to sulfate. Methods for controlling the selective oxidation process are disclosed.

Method for producing fully oxidized white liquor

Selective white liquor oxidation

Novel compositions of matter are disclosed having the formula: ##STR1## wherein the carbon rings are fully fluorinated to remove all hydrogens and olefinic character. The compositions have utility as heat transfer agents, hydraulic fluids, vapor phase soldering fluids, gas (O.sub.2, N.sub.2, CO.sub.2, H.sub.2, etc.) transport agents, such as in biological and medical fields, as well as utility as burn-in test fluid.

Perfluorinated dibutyl derivatives compounds

Novel compositions include compounds of the formula: ##STR1## wherein the carbon rings are fully fluorinated.

Perfluorinated Di-isopropylmethyl decalin

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Catasauqua, PA, United States of America

Varin Ayala