Title:
PRODUCTION METHOD FOR AMMOXIDATION CATALYST AND PRODUCTION METHOD FOR ACRYLONITRILE
Document Type and Number:
WIPO Patent Application WO/2017/188349
Kind Code:
A1
Abstract:
Provided is a production method for an ammoxidation catalyst comprising a step for preparing a precursor slurry which is to be the precursor of a catalyst, a drying step for obtaining dried particles from the precursor slurry, and a calcination step for calcining the dried particles, wherein: the step for preparing the precursor slurry is a step for mixing a first solution or slurry having a first pH with a second solution or slurry to obtain a solution or slurry having a second pH after completion of the mixing; during the mixing of the second solution or slurry, the change in the pH of the mixture through a specific range, of which the upper limit or the lower limit is a third pH or a fourth pH, occurs in 1-70 seconds; and the third pH and the fourth pH are set between the first pH and the second pH.
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Inventors:
AIKI SHOTA (JP)
FUKUZAWA AKIYOSHI (JP)
FUKUZAWA AKIYOSHI (JP)
Application Number:
PCT/JP2017/016631
Publication Date:
November 02, 2017
Filing Date:
April 26, 2017
Export Citation:
Assignee:
ASAHI CHEMICAL IND (JP)
International Classes:
B01J37/04; B01J23/887; B01J37/08; C07C253/26; C07C255/08; C07B61/00
Domestic Patent References:
| WO2014051090A1 | 2014-04-03 |
Foreign References:
| JP2006055732A | 2006-03-02 | |||
| JP2013017917A | 2013-01-31 |
Other References:
See also references of EP 3450018A4
Attorney, Agent or Firm:
INABA, Yoshiyuki et al. (JP)
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