Mitsubishi Gas Chemical Company, Inc.

Kiyoshi Yoshida

Mutsuhiko Takeda

Minoru Kakuda

Masafumi Shimpo

Tetsuo Koshitsuka

Chiharu Nishizawa

Yasuhisa Kuriyama

Yasuo Hiro

Kaoru Tsuyuki

Wakana Uesugi

Nobuhiro Nagata

Hiroya Fujii

Susumu Watanabe

Naoto Ohsaki

Jun Kokubo

Takashi Ishii

Eiko Kuwabara

Toshie Takahashi

The invention provides a method for producing a peroxymonosulfuric acid solution with high stability, including the steps of mixing 35 mass % or more of hydrogen peroxide and 70 mass % or more of sulfuric acid to react them, cooling the reaction solution to 80&#xb0; C. or lower within five minutes after initiation of the mixing step, and diluting the reaction solution with water four times or more as much as the reaction solution by mass.

Method for producing peroxymonosulfuric acid and apparatus for continuously producing peroxymonosulfuric acid

Provided is a process for producing bleached pulp, including subjecting unbleached pulp, which is obtained by cooking a lignocellulose substance, to alkali-oxygen bleaching treatment and then subjecting the alkali-oxygen bleached pulp to chlorine-free bleaching treatment including chlorine dioxide treatment, wherein in at least one chlorine dioxide treatment stage in which the chlorine dioxide treatment is performed, monopersulfuric acid is used in combination. The amount of chlorine dioxide to be used is reduced and the color reversion resistance of the bleached pulp is improved by this process.

Process for production of bleached pulp

Process for producing polyphenylene ether

Method of precipitating polyphenylene ether

The present invention provides an effective oxygen generating materials, carbon dioxide absorbing materials, and transport system and transport method of live fishery products for use upon transporting live fishery products. An oxygen generating materials of the present invention is prepared by packaging solid peroxide and peroxide decomposition catalyst with a moisture-permeable material having a cup method moisture permeability (40&deg; C., 90% RH) of more than 20 g/m /24 hr and being impervious to water at normal pressure. Furthermore, a carbon dioxide absorbing materials are prepared by packaging alkaline earth metal hydroxide and/or oxide with a gas-permeable material having a Gurley method gas permeability (JIS P8117) of 0.1&tilde;3000 sec./100 ml of gas and being impervious to water at normal pressure. Moreover, the transport system of live fishery products are a transport system wherein the oxygen generating materials and carbon dioxide absorbing materials pertaining to the present invention are sealed inside a transport bag.

Oxygen generating materials, carbon dioxide absorbing materials, and transport system and transport method of live fishery products

The present invention provides an effective oxygen generating materials, carbon dioxide absorbing materials, and transport system and transport method of live fishery products for use upon transporting live fishery products. An oxygen generating materials of the present invention is prepared by packaging solid peroxide and peroxide decomposition catalyst with a moisture-permeable material having a cup method moisture permeability (40&deg; C., 90% RH) of more than 20 g/m,/24 hr and being impervious to water at normal pressure. Furthermore, a carbon dioxide absorbing materials are prepared by packaging alkaline earth metal hydroxide and/or oxide with a gas-permeable material having a Gurley method gas permeability (JIS P8117) of 0.1&tilde;3000 sec./100 ml of gas and being impervious to water at normal pressure. Moreover, the transport system of live fishery products are a transport system wherein the oxygen generating materials and carbon dioxide absorbing materials pertaining to the present invention are sealed inside a transport bag.

A process for continuously and stably synthesizing a ketazine from hydrogen peroxide, ammonia and methyl ethyl ketone in the presence of a solution containing a catalyst. The process comprises removing sec-butyl alcohol by distillation from methyl ethyl ketone, which is reused by circulation. Also a process for preparing a hydrazine hydrate which comprises hydrolyzing the ketazine. By circulating unreacted ketone, accumulation of impurities in the circulated ketone can be prevented to obtain a high yield of the ketazine and the hydrazine hydrate, for a long period of time.

Processes for producing ketazine and hydrazine

A preparation process of hydrazine hydrate is herein disclosed which comprises the step of hydrolyzing a ketazine in a distillation column to obtain hydrazine hydrate, a nonionic surface active agent having a polyoxyethylene group in its molecule and/or silicon dioxide being present in the distillation column. According to this process, in the hydrolytic distillation of the ketazine, flooding can be inhibited and thus a stable operation can be accomplished. As a result, hydrazine hydrate can economically advantageously be prepared.

Preparation process of hydrazine hydrate

By incorporating a liquid or solid silicone or paraffin into 1,3,5-trioxane, agglomeration of trioxane particles and adhesion of the trioxane to a machine wall or the like can be prevented. The silicone or paraffin is used in an amount of 0.003 to 1% by weight.

Trioxane composition and insect-proofing agent

Disclosed is a composition comprising trioxane and an assistant aiding in the insect-proofing action of trioxane or controlling its vapor pressure.

Disclosed is a hygroscopic insect-proofing composition, and more particularly a trioxane-containing composition which is useful in insect-proofing and damp proofing of clothing.

Hygroscopic insect-proofing composition

Disclosed is a composition comprising 1,3,5-trioxane, and more particularly a stability-improved trioxane composition.

Growing community of inventors

Tokyo, Japan

Kiyoshi Yoshida