Nippon Shokubai Co., Ltd.

Other

Elf Atochem S.a.

Kazuaki Abe

Hirokazu Itoh

Hitoshi Yano

Yoshihiro Arita

Takashi Tomita

Kazumasa Kimura

Keiichiro Mizuta

Takashi Yodoshi

Ryuichi Ishikawa

Tetsushi Kawamura

Kazuya Hata

Rie Inoue

Einosuke Jodo

Kaoru Someya

Takashi Kai

An antenna device includes an antenna for receiving a time information radio wave, and an antenna support member. In the antenna, a coil is wound around a center portion of a core. In the support member, a non-magnetic portion supports two magnetic portions independently and both end portions of the core of the antenna are magnetically coupled with the magnetic portions. A radio wave controlled timepiece includes a case in an inner space of which the antenna and the support member are installed as described above. In the inner space, a time counting unit, a time display unit connected to the time counting unit, and a time updating unit configured to update the time displayed on the display unit, based on the time information radio wave received by the antenna, are installed.

Antenna device and radio wave controlled timepiece

The invention provides a method for producing purified N-vinyl-2-pyrrolidone free of odorous components. The method is composed of distilling with a distillation column a liquid, which is formed by adding to an odorous components-containing liquid having a N-vinyl-2-pyrrolidone purity of not lower than 90 wt %, a compound having boiling point lower than that of N-vinyl-2-pyrrolidone, and whereby removing the odorous components together with said low-temperature boiling compound as the distillate.

Method for preparing deodorized N-vinyl-2-pyrrolidone

The present invention provides: an unsaturated carboxylate which has both an unsaturated group and a hydroxyl group, and is applicable to a wide range of crosslinking processes, and has moderate polymerizability, and has a novel specific structure; and a production process which enables to obtain this unsaturated carboxylate without causing the rearrangement of the carbon-carbon unsaturated bond of the raw unsaturated oxirane, and gives a high production ratio of unsaturated oxirane-1-mol adduct. A reaction of a specific unsaturated carboxylic acid with a specific unsaturated oxirane is carried out using at least one catalyst selected from the group consisting of chromium compounds, manganese compounds, iron compounds, nickel compounds, zinc compounds, silver compounds, tin compounds, neodymium compounds, and lead compounds, thereby obtaining an unsaturated carboxylate of general formula (1).

Unsaturated carboxylate and its production process and use

Presulfurizing process and presulfurization promoter for a desulfurization catalyst to be used in a hydrodesulfurization unit of petroleum refinery of high molecular hydrocarbons, in which fresh metal oxide in said desulfurization catalyst is sulfurized with hydrogen sulfide produced from sulfur-containing compounds in a feed stream. In the invention, a compound having mercapto alkylthio group: HS&mdash;C,H,&mdash;S&mdash; (in which &ldquo;m&rdquo; is an integer of 2 to 4) is added as promoter at a proportion of 10 ppm to 0.5% by weight and presulfurization is promoted at 180 to 260&deg; C.

Process for presulfurizing a desulfurization catalyst used in a hydrodesulfurization unit of petroleum refinery and presulfurization promoter

A method for the production of a sulfide group-containing thiol compound which comprises causing alkylene sulfide to react with a thiol compound in the presence of at least one basic catalyst selected from the group consisting of basic ion-exchange resins, quaternary ammonium compounds and alkyl pyridinium compounds, thereby inducing the ring-opening addition of the alkylene sulfide to the thiol compound. Further, a method for the production of a sulfide group-containing mercaptocarboxylic ester which comprises causing an alkylene sulfide to react with a mercaptocarboxylic ester.

Method for production of sulfide group-containing thiol compound

An object is to provide a method for the production of a sulfide group-containing thiol compound which comprises using a solvent capable of effecting the ring-opening addition reaction of an alkylene sulfide to a thiol compound without inducing the alkylene sulfide to polymerize. A method for the production of a sulfide group-containing thiol compound, which comprises effecting the ring-opening addition reaction of an alkylene sulfide represented by the general formula (1): ##STR1## (wherein R.sup.1, R.sup.2, R.sup.3, and R.sup.4, which may be identical or different, stand for a hydrogen atom, an alkyl group of 1 to 10 carbon atoms, or an aromatic group of 6 to 15 carbon atoms) to a thiol compound in a solvent of an amide compound or urea substituent-containing compound.

A process for producing a modified polyaminoamide with markedly increased reactivity as an epoxy resin curing agent is disclosed. The process comprises introducing amino groups and mercapto groups into a polyaminoamide by using an aziridine compound and a thiirane compound. The modified polyaminoamide is capable of curing an epoxy resin at a low temperature and at a high rate to provide a cured epoxy resin excellent in anticorrosion and chemical resistance.

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Osaka, Japan

Kazuaki Abe