Title:
PROCESS FOR PRODUCING THICK AQUEOUS SOLUTION OF AZO AND/OR AZOXYSTILBENE DYE
Document Type and Number:
WIPO Patent Application WO/2006/004056
Kind Code:
A1
Abstract:
A process for efficiently producing a thick aqueous solution of a yellow azo- and/or azoxystilbene dye obtained by the self-condensation of a 4-nitrotoluene-2-sulfonic acid in the presence of an alkali metal hydroxide. The process, which is for producing a thick aqueous solution, comprises converting a sparingly water-soluble alkali metal salt of the azo and/or azoxystilbene dye into an oleophilic ammonium salt (primary amine conversion) and then converting it into an alkanolammonium salt (secondary amine conversion), wherein the primary amine conversion is conducted either in a system comprising a C12-40 trialkylamine, diethylbenzene, and water or in a system comprising a C12-40 trialkylamine and water and the secondary amine conversion is conducted by adding a C2-4 alkanolamine to a phase of the oleophilic ammonium salt. Thus, a thick aqueous solution of the dye is produced.
Inventors:
Satou, Fumitaka (1-8-10, Ohara Urawa-ku, Saitama-sh, Saitama 46, 33000, JP)
Aizawa, Takao (Diapalace Kumagaya, 399-5 Muraoka, Kumagaya-sh, Saitama 62, 36001, JP)
Sugiyama, Hiroshi (133 Fujiikamigumi, Hanyu-shi Saitama, 64, 34800, JP)
Aizawa, Takao (Diapalace Kumagaya, 399-5 Muraoka, Kumagaya-sh, Saitama 62, 36001, JP)
Sugiyama, Hiroshi (133 Fujiikamigumi, Hanyu-shi Saitama, 64, 34800, JP)
Application Number:
PCT/JP2005/012235
Publication Date:
January 12, 2006
Filing Date:
July 01, 2005
Export Citation:
Assignee:
NIPPON KAYAKU KABUSHIKI KAISHA (11-2, Fujimi 1-chome Chiyoda-k, Tokyo 72, 10281, JP)
KABUSHIKI KAISHA NIPPON KAYAKU TOKYO (1-23-1, Shinden Adachi-k, Tokyo 65, 12308, JP)
Satou, Fumitaka (1-8-10, Ohara Urawa-ku, Saitama-sh, Saitama 46, 33000, JP)
Aizawa, Takao (Diapalace Kumagaya, 399-5 Muraoka, Kumagaya-sh, Saitama 62, 36001, JP)
Sugiyama, Hiroshi (133 Fujiikamigumi, Hanyu-shi Saitama, 64, 34800, JP)
KABUSHIKI KAISHA NIPPON KAYAKU TOKYO (1-23-1, Shinden Adachi-k, Tokyo 65, 12308, JP)
Satou, Fumitaka (1-8-10, Ohara Urawa-ku, Saitama-sh, Saitama 46, 33000, JP)
Aizawa, Takao (Diapalace Kumagaya, 399-5 Muraoka, Kumagaya-sh, Saitama 62, 36001, JP)
Sugiyama, Hiroshi (133 Fujiikamigumi, Hanyu-shi Saitama, 64, 34800, JP)
International Classes:
C09B56/04; C09B67/26; (IPC1-7): C09B67/26; C09B56/04
Attorney, Agent or Firm:
Kawaguchi, Yoshio (Kawaguti & Partners, Yuhsen Shinjuku Gyoen Bldg. 1-11, Shinjuku
1-chome, Shinjuku-k, Tokyo Tokyo, 160-0022, JP)
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