UNITAR-sponsored established definitions

Table L Table of UNITAR-Sponsored Established Definitions for Bitumen...

Some terms are used in other ways by other researchers, or in other countries, and may have legal definitions different from those given here. The distinctions drawn among light, heavy, extra-heavy, and bituminous crude oils were made on the basis of United Nations Institute for Training and Research (UNITAR)-sponsored discussions aimed at establishing such definitions (i-3). For terms drawn from the area of colloid and interface science, much reliance was placed on the recommendations of the lUPAC Commission on Colloid and Surface Chemistry (4), For important emulsion terms that are frequently used in industrial practice, the aim was to be consistent with the standard petroleum dictionaries such as references 5-7. 

Oil sands are essentially beds of sand containing a heavy hydrocarbon bitumen. Bitumen is chemically similar to conventional oil but has comparatively high density (low API gravity) and high viscosity. Although a number of definitions for bitumen have been used by various authors, a reasonable set of definitions is given in Table I, based on the United Nations Institute for Training and Research (UNITAR)-sponsored attempts to establish definitions (1—3). 

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See also in sourсe #XX -- [ ]

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