Removal of basic nitrogen compounds from organic streams
AssigneeExxon Research & Engineering Co.
InventorZeinab Baset
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Abstract
Basic nitrogen compounds are removed from organic streams which are substantially free of water by contacting the stream with gaseous sulfur dioxide thereby precipitating a complex containing the basic nitrogen compounds and sulfur dioxide, and thereafter separating the precipitating complex from the contacted stream. The basic nitrogen compounds and the sulfur dioxide can then be regenerated from the complex.
Claims6
A method for separating basic nitrogen compounds from an organic feedstream selected from the group consisting of coal liquids, oil-shale liquids, petroleum oils, and coal bottoms which are soluble in common organic solvents at temperatures from about 10.degree. C. to about 25.degree. C., which stream is substantially free of water, the method comprising:
- (a) contacting said stream at a temperature from about 10.degree. C. to about 25.degree. C. with gaseous sulfur dioxide thereby effecting a precipitate containing basic nitrogen compounds;
- and
- (b) separating the precipitate from the contact stream.
The method of claim 1 or 3 wherein at least one mol of gaseous sulfur dioxide is employed for each mol of basic nitrogen compound present in the stream.
Dependencies are inferred from the claim text.