E.i. Dupont De Nemours and Company

Wayne B Ely

Stephen Ernest Jacobson

Carl Andrew Renner

Benny E Blackwell

Luis Alberto Chu

Steven Lamar Grise

Zeru Berhane Tekie

Monroe Davis

Robert Joseph Flowers

The present invention provides a process for removing ammonia as an aqueous salt solution from an acid gas comprising ammonia and hydrogen sulfide. A strong acid, such as sulfuric acid, is used as a scrubbing agent to convert ammonia to an ammonium salt. Control of pH and stripping in combination with reboiler or evaporators reduces hydrogen sulfide concentration. The ammonium salt is produced as an aqueous solution, which may crystallized to form a solid product. The ammonium salt solution or solid may be used as a fertilizer.

Process for scrubbing ammonia from acid gases comprising ammonia and hydrogen sulfide

A process that can be used for producing an alkali metal alcoholate such as sodium alcoholate or for removing a residual mixture containing alkali metal and alkaline earth metal from a vessel such as, for example, a tank car or storage tank used in manufacturing an alkali metal is disclosed. The process comprises contacting a mixture, which comprises an alkali metal and an alkaline earth metal, with an alcohol under a condition sufficient to produce an alkali metal alcoholate and alkaline earth metal alcoholate and, optionally, separating and recovering the alkali metal alcoholate.

Production of alcoholates

A process for preparing perhaloacyl chlorides such as trifluoroacetyl chloride by oxidizing lower perfluoroalkyl and monochloroperfluoroalkyl dichloromethane within the supercritical region and in the absence of water.

Process for preparing perhaloacyl chlorides

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West Chester, PA, United States of America

Wayne B Ely