Basf Corporation

David C Hendrix

Andrew J McNabb

Michael Loden

Jaime R Morales

Nguyen L Kim

Decomposition of excess hydroxylamine is accomplished by bringing a hydroxylamine-containing wastewater stream into contact with hydrogen peroxide. Most preferably, the wastewater stream is at neutral pH (e.g., pH between 7-8) and at elevated temperature (e.g., at least about 90&deg; C.) when brought into contact with hydrogen peroxide. The presence of ammonium ion (NH ) accelerates the decomposition of hydroxylamine in the wastewater stream.

Decomposition of residual hydroxylamine by hydrogen peroxide treatment

The present invention is a process for treatment of waste water streams having a sodium sulfate content of above 20 percent. The process is useful for treating waste water generated in the production of polyethyleneimine and cyclohexanone. The process includes the steps of removing sodium sulfate from waste water by the addition of organic solvent. The waste water having reduced sodium sulfate content is then subjected to biological treatment with activated sludge. First the waste water is subjected to pre-treatment. Pre-treated waste water is combined other waste water and treated by denitrification and nitrification.

Process for waste water treatment by removal of sodium sulfate

A continuous process for the partial oxidation of hydrocarbons is disclosed wherein the oxidizing gas is partitioned into the hydrocarbon by means of countercurrent flow of an aqueous solution of oxygen prepared in a separate vessel, thus avoiding direct contact of hydrocarbon and oxidizing gas.

Process for the oxidation of hydrocarbons utilizing partitioning of

Disclosed is an improved rotary drum vacuum filter that is especially useful in the filtration of particulates that form an easily eroded cake. The improved filter utilizes sprayers and a spray blocking means to achieve an unexpectedly efficient rinse of the cake.

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Lake Jackson, TX, United States of America

David C Hendrix