Kureha Kagaku Kogyo Kabushiki Kaisha

Kureha Chemical Industry Company, Limited

Kazuyoshi Inada

Sakuo Noda

Fumihiko Kimura

Koji Seguchi

Hitoshi Takita

Yutaka Mukaida

Toyohiko Nitta

Kiyoshi Tagaya

Kohju Watanabe

Mari Toji

Minoru Sugita

Yuji Nakamura

Kiyonori Umekawa

Masayuki Funabashi

Hidetoshi Kobayashi

Ritaro Saito

Kobayashi, Hidetoshi

Hisao Sanada

Disclosed herein are a derivative of dihydroxybenzamide represented by the formula(I): ##STR1## wherein (1) R.sup.1 represents a hydrogen atom or a lower alkyl group and R.sup.2 represents a straight chain-alkyl group of 4 to 12 carbon atoms, a branched chain-alkyl group of 4 to 12 carbon atoms, a cyclo-alkyl group of 4 to 12 carbon atoms, ##STR2## wherein n is an integer of 1 to 6, or a pyridyl group which is substituted or unsubstituted, or (2) R.sup.1 and R.sup.2 are cyclized to make a heterocycle containing amino group represented by the formula ##STR3## wherein X represents a nitrogen atom or a methine and Y represents a hydrogen atom, an alkyl group of 1 to 6 carbon atoms or a phenyl group, and a pharmaceutical composition containing the same.

Derivative of dihydroxybenzamide and a pharmaceutical composition thereof

Novel saccharide derivatives of protocatechualdehyde represented by the general formula (I): ##STR1## wherein R.sup.1 represents a hydrogen atom or a benzoyl group, and R.sup.2 represents an alkyl group. The method for preparing thereof and the use of the compound as antiinflammatory agents.

Saccharide derivatives of protocatechualdehyde

Derivative of dihydroxybenzamide and a pharmaceutical composition having

From an exhaust gas containing nitrogen oxides, the nitrogen oxides can be advantageously removed by contacting the exhaust gas with ammonia in the presence of a substance derived from laterite.

Dry method for the denitrification of exhaust gas containing nitrogen

In the thermal cracking of heavy petroleum oil (having an API specific gravity of not more than 25) in a tubular type heating furnace, a specific inorganic substance is added in a specific proportion to the heavy petroleum oil to prevent the heavy oil from undergoing coking inside the furnace.

Method for the treatment of heavy petroleum oil

In the thermal cracking of a heavy petroleum oil (having an API specific gravity of not more than 25) in a tubular type heating furnace, possible occurrence of coking trouble inside the furnace can be prevented by applying a magnetic field of fixed magnitude transversely to the flow of the heavy petroleum oil being introduced into the furnace or by applying a fixed magnitude of magnetic field transversely and, at the same time, applying a fixed magnitude of direct-current voltage parallel to the flow of the heavy petroleum oil being introduced into the furnace. More effective prevention of occurrence of coking can be obtained by having a specific inorganic substance incorporated in the heavy petroleum oil before the oil is subjected to the magnetic field or to simultaneous application of the magnetic field and voltage.

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Tokyo, Japan

Kazuyoshi Inada