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Title:
METHOD FOR CONCENTRATING AQUEOUS 3-HYDROXY-2,2-DIMETHYLPROPANAL SOLUTION
Document Type and Number:
WIPO Patent Application WO/2012/118196
Kind Code:
A1
Abstract:
Provided is a method for concentrating an aqueous solution that contains at least 3-hydroxy-2,2-dimethylpropanal and/or a dimer thereof. The concentration method comprises a step wherein at least one substance selected from the group consisting of 1-butanol, 2-butanol, 2-methyl-1-propanol, 1-pentanol and 1-hexanol is added, as an entrainer, into an aqueous solution that contains at least 3-hydroxy-2,2-dimethylpropanal and/or a dimer thereof, and the thus-obtained mixed solution of the aqueous solution and the entrainer is subjected to azeotropic distillation with use of a distillation column so as to remove water and the entrainer by distillation.

Inventors:
MATSUURA, Yutaka (Inc. Mizushima Plant, 10, Mizushimakaigandori 3-chome, Kurashiki-sh, Okayama 25, 〒7128525, JP)
松浦 豊 (〒25 岡山県倉敷市水島海岸通三丁目10番地 三菱瓦斯化学株式会社 水島工場内 Okayama, 〒7128525, JP)
KUZUHARA, Ikutaro (Inc. Hiratsuka Research Laboratory, 6-2, Higashiyawata 5-chome, Hiratsuka-sh, Kanagawa 16, 〒2540016, JP)
Application Number:
JP2012/055438
Publication Date:
September 07, 2012
Filing Date:
March 02, 2012
Export Citation:
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Assignee:
MITSUBISHI GAS CHEMICAL COMPANY, INC. (5-2 Marunouchi 2-chome, Chiyoda-ku Tokyo, 24, 〒1008324, JP)
三菱瓦斯化学株式会社 (〒24 東京都千代田区丸の内二丁目5番2号 Tokyo, 〒1008324, JP)
MATSUURA, Yutaka (Inc. Mizushima Plant, 10, Mizushimakaigandori 3-chome, Kurashiki-sh, Okayama 25, 〒7128525, JP)
松浦 豊 (〒25 岡山県倉敷市水島海岸通三丁目10番地 三菱瓦斯化学株式会社 水島工場内 Okayama, 〒7128525, JP)
International Classes:
C07C45/84; C07C45/75; C07C47/19; C07D319/06
Foreign References:
JP2000505103A2000-04-25
JP2010520250A2010-06-10
Other References:
See also references of EP 2684860A4
None
Attorney, Agent or Firm:
OHTANI, Tamotsu et al. (OHTANI PATENT OFFICE, Bridgestone Toranomon Bldg. 6F. 25-2, Toranomon 3-chome, Minato-k, Tokyo 01, 〒1050001, JP)
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Claims: