Title:
CATALYST FOR PRODUCTION OF METHACRYLIC ACID AND PRODUCTION OF METHACRYLIC ACID USING THE SAME
Document Type and Number:
Japanese Patent JP3482476
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain a catalyst having higher reactivity and selectivity and a longer service life than the conventional catalyst.
SOLUTION: This catalyst is a partially neutralized salt of a hetero-polyacid represented by the formula, PaMobVcSbdCueXfOg. Starting materials for this catalyst except starting material for V and/or starting material for Sb are mixed, dissolved or suspended in water and heated at 80-200°C for 1-24hr in the presence of ammonium radicals, starting material for V and/or starting material for Sb is added, they are heated again at 80-200°C for 1-24hr and then firing is carried out.
Inventors:
Junya Yoshizawa
Toshiaki Ui
Koichi Nagai
Toshiaki Ui
Koichi Nagai
Application Number:
JP18041496A
Publication Date:
December 22, 2003
Filing Date:
July 10, 1996
Export Citation:
Assignee:
Sumitomo Chemical Co., Ltd.
International Classes:
B01J37/08; C07B61/00; C07C57/055; B01J27/199; (IPC1-7): B01J27/199; B01J37/08; C07C57/055
Domestic Patent References:
| JP686932A | ||||
| JP3238050A |
Attorney, Agent or Firm:
Takashi Kuboyama