Title:
イミノジこはく酸塩の製造および使用
Document Type and Number:
Japanese Patent JP4027992
Kind Code:
B2
Abstract:
Preparation of imino-disuccinic acid alkali metal salts (I) involves: (i) reacting maleic anhydride (MA), alkali metal hydroxide (AMH), ammonia and water, in MA:AMH:NH3:H2O molar ratio of 2:0.1-4:1.1-6:5-30, at 70-170 degrees C and 1-80 bars for 0.1-100 hrs.; (ii) distilling off NH3 and water from the reaction mixture, with addition of water and 0-4 mol. AMH per 2 mols. MA initially used, at 50-170 degrees C and 0.1-50 bars over 0.1-50 hours, and (iii) adding water in an amount such that the obtained solution has a solids content of 5-60 wt.%.
Inventors:
Grot, Torsten
Wingen, Vinfleet
Bagner, Paul
Murakami Masayoshi
Benderroth, Echult
Loik, Thomas
Wingen, Vinfleet
Bagner, Paul
Murakami Masayoshi
Benderroth, Echult
Loik, Thomas
Application Number:
JP54230498A
Publication Date:
December 26, 2007
Filing Date:
March 23, 1998
Export Citation:
Assignee:
LANXESS Deutschland Gezershyaft Mitt Besilyenktel Haftung
International Classes:
C07C229/24; C07C227/06; C07C227/08; D21C9/10
Attorney, Agent or Firm:
Heikichi Odashima