Abstract


LIQUEFACTION OF KUKERSITE CONCENTRATE AT 330-370 °C IN SUPERCRITICAL SOLVENTS

H. LUIK
I. KLESMENT

Institute of Chemistry
Tallinn, Estonia

The action of lower aliphatic and aromatic hydrocarbons and their mixtures with water on kukersite conversion to liquid products in autoclaves was studied. The effect of methanol or formate as hydrogen donor and zinc dust on the yield and composition of liquid products obtained was investigated as well. The amounts of organic matter dissolved by individual solvents only slightly differed, but the exchange of the part of solvent for the same amount of water in all cases resulted in increasing the oil yield. The latter is strongly dependent on the temperature, reaction time, type of solvent, and the concentration ratio of solvent to water. Using benzene- water mixtures and varying liquefaction parameters, almost complete conversion of kukersite into liguid product was achieved.
The oils obtained by liquefaction are heavy characterized by a high density and molecular weight and a great content of asphaltenes. Kukersite liquefaction by in situ hydrogen generation, using methanol and zinc-water reaction system, resulted in a considerable decrease in the content of asphaltenes and heteroatoms.

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