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US 9,404,132 B2Granted
Method for producing 1,5-pentamethylenediamine, 1,5-pentamethylenediamine, 1,5-pentamethylene diisocyanate, method for producing 1,5-pentamethylene diisocyanate, polyisocyanate composition, and polyurethane resin
AssigneeMitsui Chemicals, Inc.
InventorsTomonori Hidesaki, Akiko Natsuji, Toshihiko Nakagawa, Goro Kuwamura, Daisuke Hasegawa, Satoshi Yamasaki, Kuniaki Sato, Hiroshi Takeuchi
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Abstract
In a method for producing 1,5-pentamethylenediamine, a lysine decarboxylase-expressing microorganism that is subjected to a treatment is used.
Claims1
A method for producing 1,5-pentamethylene diisocyanate, comprising:
- obtaining an aqueous solution containing 1,5-pentamethylenediamine by lysine decarboxylation reaction;
- mixing, without heating the aqueous solution, the obtained aqueous solution containing 1,5-pentamethylenediamine as it is with a monohydric alcohol having 4 to 7 carbon atoms as an extractant at a mixing ratio of the extractant of 50 to 200 parts by mass relative to 100 parts by mass of the aqueous solution containing 1, 5-pentamethylenediarnine per extraction;
- carrying out liquid-liquid extraction-at 15 to 50 ° C. to obtain 1,5-pentamethylenediamine;
- and
- phosgenating the obtained 1,5-pentamethylenediamine.
2 more elements
Dependencies are inferred from the claim text.