Dai Nippon Printing Co., Ltd.

Mitsui Chemicals, Inc.

Kiyoshi Itou

Abul Iqbal

Zhimin Hao

Toshio Yoshihara

Kazuhiko Nakamura

Minoru Furukawa

Tamotsu Asano

Seiichi Watanabe

Takeya Abe

Kaori Matoishi

Kenju Sasaki

Shinya Okazaki

Glycolic acid having a high purity is obtained by subjecting glycolic acid or a glycolic acid solution containing contaminants to double-chamber electrodialysis combined with one or more treatments selected from among treatment with an activated carbon, treatment with an ion exchange resin, concentration treatment and cooling crystallization.

Process for producing glycolic acid

The invention is to provide a process for effectively removing impurities contained in an amide compound-containing solution by making an amide compound-containing solution, particularly an amide compound-containing solution produced by a hydration reaction of a nitrile compound by using a microorganism fungus body containing nitrile hydratase or a processed product of the microorganism fungus body, in contact with activated carbon under acidic conditions.

Method of purifying amide compound

There are provided a pigment-containing coloring material stably dispersible in a high concentration in various organic solvents, and a process for producing the same. The production process of the coloring material is characterized by comprising the steps of: providing a solution comprising (1) a soluble pigment precursor which is convertible into an insoluble pigment, (2) a solvent capable of dissolving the soluble pigment precursor therein, and (3) a stabilizing agent comprising an organic compound having a structure or a functional group capable of stabilizing the dispersibility of the insolubilized pigment in the solvent; and converting said soluble pigment precursor into an insoluble pigment to obtain the coloring material containing the insolubilized pigment dispersed stably in the solvent.

Coloring material and color filter

The present invention provides a new carbazole based compound represented by the following formula (1):wherein R is a substituent selected among a hydrogen atom, an alkyl group, an alkyl ether group, a sulfoamino group, a carbon cyclic group, a heterocyclic group and an aromatic cyclic group, 'n' is integer, where at least one substituent other than the hydrogen atom are introduced and the each substituent may be the same or different.

Carbazole based compound, coloring material, colored high molecular organic material and electroluminescent material

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Tokyo, Japan

Kiyoshi Itou