Nippon Soda Co., Ltd.

Minoru Kaeriyama

Isao Iwataki

Nobuo Matsui

Tomoya Hidaka

Hisao Ishikawa

Hideo Hosaka

Tomio Yamada

Shozo Yamada

Toru Kawabe

Kenichi Kohara

Kuniyasu Maeda

Yasuyuki Suzuki

Masayuki Hanzawa

Syuichiro Sanpei

Akira Nakayama

Takehiro Sato

Yasushi Yasuda

Masami Mizuno

Akira Nakata

Kimiaki Kinosita

Susumu Okunuki

A process for producing 4-isopropoxy-4'-hydroxydiphenyl sulfone useful as the developer for leuco dyes to be used in thermosensible papers, which is excellent in productivity, economical efficiency and safety and permits the production of the compounds from constantly available raw materials. This process is improved in productivity and economical efficiency as compared with those of the prior art both by shortening the production time by the use of an isopropyl iodide, which is more reactive than isopropyl bromide which have been used in the prior art.

Industrial process for the production of diphenyl sulfone compounds

A process for producing compounds of general formula (II) useful as the developer for leuco dyes to be used in thermosensible papers, which is excellent in productivity, economical efficiency and safety and permits the production of the compounds from constantly available raw materials. This process is improved in productivity, economical efficiency and safety as compared with those of the prior art both by shortening the production time by the use of, e.g., an alkyl iodide, RI, which is more reactive than alkyl bromides which have been used in the prior art, and by attaining the complete recovery and reuse of iodine by incorporating into the process the iodine recovery step of recovering iodine from the manufacturing wastewater and reacting this iodine with an alcohol to thereby self-produce an alkyl iodide.

Phenethyl alcohol derivative and recording material containing the same

A compound having the general formula ##STR1## wherein R.sub.1 is alkyl having 1-3 carbon atoms;

Cyclohexenone derivatives, preparation and herbicidal use

A compound having the general formula ##STR1## wherein R.sub.1 is ethyl or allyl; and

5-Phenylcyclohexenone derivatives

Thiazolino-[3,2-a]-1,3,5-triazine-2-one-4-(one or thione) derivatives

A compound of the formula ##STR1## wherein typical representations of X, Y and Z is oxygen or sulfur; R.sub.1 is methyl; R.sub.2 is phenyl substituted with chlor, methyl, methoxy, nitro or methylenedioxy; and R.sub.3 is cyclohexyl, methylcyclohexyl or tetrahydropyranyl, is useful as an acaricide.

Heterocyclic compounds

Compounds of the general formula ##STR1## wherein X is trifluoromethyl or halogen,

Diphenylamine derivatives

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Kanagawa, Japan

Minoru Kaeriyama