Title:
METHOD OF PREVENTING POLYMERIZATION OF METHACRYLIC ACID
Document Type and Number:
Japanese Patent JP3691086
Kind Code:
B2
Abstract:
PURPOSE: To provide a method of inhibiting the polymerization of methacrylic acid in order to obtain a methacrylic acid product of high purity by avoiding addition of foreign substances to this acid.
CONSTITUTION: In order to prevent methacrylic acid from polymerizing during the processes such as purification, storage or transportation, or esterification reaction, a trinuclear complex of manganese methacrylate having a trivalent manganese ion, expressed by the formula, [Mn3(μ-O) (μ-MAA)6(H2O)3]X (Mn is a trivalent manganese atom, MAA is an methacrylcarboxylate anion, X is chloride ion, nitrate ion or methacrylcarboxylate anion), is added.
Inventors:
Kazuo Wakimura
Shinichi Tadokoro
Seiji Matsui
Shinichi Tadokoro
Seiji Matsui
Application Number:
JP18561094A
Publication Date:
August 31, 2005
Filing Date:
August 08, 1994
Export Citation:
Assignee:
Mitsui Chemicals, Inc.
KURARAY CO.,LTD.
KURARAY CO.,LTD.
International Classes:
C07C57/075; C07C51/64; (IPC1-7): C07C51/64; C07C57/075
Domestic Patent References:
| JP7017897A | ||||
| JP2209842A |
Attorney, Agent or Firm:
Akio Miyazaki
Katsuhiro Ito
Ishibashi Masayuki
Katsuhiro Ito
Ishibashi Masayuki