Abstract: A process for the production of a highly aromatic pitch-like hydrocarbon by disintegration of comminuted coal or similar carbonaceous raw material with hydrocarbon mixtures as solvent at elevated temperature and pressure.

Abstract: A process for the production of thionaphthene by dissociation of thionaphthene sulfonic acid such as obtained, for example, in the partial sulfonation of naphthalene fractions of coal tar, characterized in that the density of the reaction mixture is maintained essentially constant during the entire duration of the dissociation reaction and the thionaphthene formed is not removed by azeotropic distillation; a product of high purity is obtained in high yield in a substantially reduced reaction time.

Abstract: A process is described for the production of high grade carbonaceous binders, wherein an aromatic high grade carbonaceous material is produced from 5-40% by weight of reduced or low ash coal or similar carbon containing raw materials by treatment with 20-80% by weight of high-boiling aromatic solvents, derived from coal, and 15-50% by weight of high-boiling aromatic solvents, derived from mineral oil, at temperatures of 300.degree.-420.degree. C. and for a reaction period of 1-4 hours, at a reaction pressure of up to 50 bar, and is optionally freed from low-boiling components.

Abstract: This invention relates to a plasticized coal tar pitch comprising a mixture consisting essentially of about 50 to about 80 weight percent of a coal tar pitch having a softening point of about 40.degree. to about 75.degree. C. (Kramer-Sarnow); and about 50 to about 20 weight percent of a coal tar fraction rich in crystals and having a boiling point of about 350.degree. C. to about 450.degree. C. The mixture is suitable for blending with crude oil bitumen for producing a binder suitable for application to roadways.

Abstract: An improved contact structure for an electrical switching apparatus including stationary and movable electrical contacts comprising an electrical arc conducting member constructed of ferromagnetic material, and an electrical contact member, disposed on the electrical arc conducting member for engagement with an opposing contact of the switching apparatus, and constructed of non-magnetic material.

Abstract: In a process for obtaining substantially sulfur free pure naphthalene from bituminous coal tar and thionaphthene as a by-product, a de-phenolized thionaphthene-containing naphthalene fraction from oxidative purification is extracted with concentrated sulfuric acid and acetic acid anhydride in benzene. The thionaphthene is converted into its sulfonic acid derivative and water washed from the benzene-naphthalene mixture. The benzene is distilled leaving pure naphthalene. The sulfonic acid group is cleaved from the thionaphthene with superheated steam to yield thionaphthene.