Abstract
This article determines the distribution of total and basic nitrogen in petroleum crudes, and particularly in the products from the crudes, as an index that is needed in order to characterize the materials for process purposes. The content of total nitrogen in Caspian crudes and in the cuts distilling above 300/sup 0/C is calculated by a modified Dumas-Parks method in which the ordinary copper oxide is replaced by activated copper oxide, and the shape and volume of the combustion tube is changed. Potentiometric titration is used to determine the content of basic nitrogen (% by weight). It is determined that in the cuts distilling up to 250/sup 0/C, the contents of total and basic nitrogen are approximately equal; that the nitrogen contents increase with increasing boiling point; that some 70-80% of the total nitrogen present in the original crude is concentrated in the cuts above 350/sup 0/C; and that no primary or secondary amines were detected in the cuts. Includes 2 tables.
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