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Title:
MULTIMETAL OXIDE COMPOSITION, ITS PRODUCTION AND PRODUCTION OF METHACRYLIC ACID
Document Type and Number:
Japanese Patent JPH07267636
Kind Code:
A
Abstract:

PURPOSE: To obtain an improved composition as a catalyst for catalytic gas phase oxidation of methacrylic to methacrylic acid by mixing pulverized preformed specific oxometaliate with pulverized other oxometaliate and calcining.

CONSTITUTION: Oxometaliate B expressed by formula III is preformed in a pulverized form and is mixed with a pulverized perfectly dry blend of source materials of elementary constituents of oxometaliate A expressed by formula II. The mixture is clacined at a temp. of 250-450°C to obtain the objective multiple multimetal oxide composition expressed by formula I. In the formulas, X1 is P or the like; X2 is V or the like, X3 is H, ≤97 mol.% of which can be replaced by K or the like; X4 is Sb or the like; X5 is Re or the like; X6 is Mo or the like; X7 is Li or the like; a is 1-6; b is 0-6; c is 3-5; d is 0-6; e is 0-3; f is 0-3; g is 4-24; h is 0-20; x, y express valences or the like of the elements in the formula I other than oxygen atom.


Inventors:
FURIITORITSUHIIGEORUKU MARUTEI
HARUTOMUUTO HIPUSUTO
ANDOREASU TENTEN
Application Number:
JP2681795A
Publication Date:
October 17, 1995
Filing Date:
February 15, 1995
Export Citation:
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Assignee:
BASF AG
International Classes:
C01G1/00; B01J23/88; B01J23/885; B01J27/14; B01J27/195; B01J27/199; B01J35/00; C01G1/02; C01G39/00; C07B61/00; C07C51/25; C07C57/055; (IPC1-7): C01G1/00; B01J27/195; B01J27/199; C01G39/00; C07C57/055
Attorney, Agent or Firm:
Toshio Yano (2 outside)