Nippon Steel Chemical Co., Ltd.

Agency of Industrial Science and Technology

Ministry of International Trade & Industry

Chiyoda Chemical Engineering Construction Co., Ltd.

Shinnikka Environmental Engineering Co., Ltd.

Iwatani Industrial Gases Corp.

Hiroshi Okazaki

Mahito Soeda

Hideki Hashimoto

Takashi Abe

Eiji Hayashi

Munekazu Nakamura

Noriyuki Yoneda

Osamu Togari

Kiyotaka Onishi

Hiroshige Muramatsu

Tokuo Yoshimura

Tadashi Komoto

Hiromu Wada

Haruhiko Yoshida

Masaharu Inoue

Hisayuki Ishida

Takeharu Yushima

The heat-transfer medium compositions of this invention contain biphenyl, diphenyl ether and diphenylene oxide with diphenylene oxide added in a proportion of 1 to 30% by weight and they are useful for high-temperature equipment such as chemical reactors and solar heat power plants for their long-term serviceability in the vicinity of 400.degree. C. and their fluidity at ambient temperature.

Heat-transfer medium compositions

A method for the hydrogenation of coal tar pitch which comprises subjecting said coal tar pitch containing toluene insolubles to slight hydrogenation in the presence of a hydrogenation catalyst having carried on a refractory inorganic oxide carrier at least one member selected from the class consisting of elemental metals, belonging to Groups VI B and VIII in the Periodic Table and oxides and sulfides thereof, under the conditions of 280.degree. to 400.degree. C. of reaction temperature, 20 to 200 kg/cm.sup.2. G of hydrogen pressure, 0.1 to 10 hr.sup.-1 of LHSV, and 500 to 2,000 Nl/liter of hydrogen to liquid ratio, and a catalyst therefor. The 'slight' hydrogenation is hydrogenation to a degree such that the difference of hydrogen to carbon atomic ratio between the untreated coal tar pitch and the hydrogenated coal tar pitch falls in the range of 0.03 to 0.5. The coal tar pitch can be coal tar pitch itself, coal tar pitch pretreated for the removal of organic sodium compounds, or pretreated for the removal of quinoline insolubles and, preferably, the coal tar pitch has a density in the range of 1.13 to 1.17 g/cm.sup.2 at 40 degrees C.

Method for hydrogenation of coal tar pitch

Perfluorobicyclolactam compounds represented by the general formula: ##STR1## wherein --A-- stands for ##STR2## l, m, and n respectively stand for 0 or 1, 3 or 4, and 1 or 2, and R.sub.f stands for a lower perfluoroalkyl group, are novel compounds. These compounds are useful as intermediates for the synthesis of, e.g., functional macromolecular membranes and lubricants. These compounds are produced by subjecting compounds of the general formula: ##STR3## and fuming sulfuric acid to a thermal reaction.

Perfluorobicyclolactam compound and method for production thereof

A process for the production of decahydroisoquinoline is disclosed which comprises hydrogenating isoquinoline or partially hydrogenated isoquinoline in the presence of a ruthenium catalyst at a temperature of 110.degree. C. to 230.degree. C. under a hydrogen pressure of at least 10 kg/cm.sup.2 .multidot.G.

Process for production of decahydroisoquinoline

Method for treating a water-containing waste oil

Growing community of inventors

Munakata, Japan

Hiroshi Okazaki