PROCESS FOR PRODUCING OXIDE CATALYST AND PROCESS FOR PRODUCING UNSATURATED NITRILE

WIPO Patent Application WO/2018/025774

A1

A process for producing an oxide catalyst containing Mo, V, Sb, and Nb, the process comprising: a raw-material preparation step comprising a substep (I) for preparing an aqueous liquid mixture (A) containing Mo, V, and Sb, a substep (II) for adding hydrogen peroxide to the aqueous liquid mixture (A) to accelerate the oxidation of the aqueous liquid mixture (A) and obtain an aqueous liquid mixture (A'), and a substep (III) for mixing the aqueous liquid mixture (A') with an Nb source liquid (B) to obtain an aqueous liquid mixture (C); a drying step in which the aqueous liquid mixture (C) is dried to obtain a dry powder; and a burning step in which the dry powder is burned in an inert gas atmosphere. The time period from the addition of the hydrogen peroxide to the aqueous liquid mixture (A) to the mixing with the Nb source liquid (B) is less than 5 minutes. The aqueous liquid mixture (A') before being subjected to the substep (III) has an oxidation-reduction potential of 150-350 mV.

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WO/2009/139053	PROCESS FOR PRODUCING METAL-BEARING CATALYST
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TATENO ERI (JP)
KADOWAKI MINORU (JP)

PCT/JP2017/027510

February 08, 2018

July 28, 2017

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ASAHI CHEMICAL IND (JP)

B01J37/04; B01J23/28; B01J37/08; B01J37/12; C07C253/26; C07C255/08; C07B61/00

WO2014050615A1	2014-04-03
WO2015133510A1	2015-09-11
WO2004108278A1	2004-12-16

JP2003071284A	2003-03-11
JPH11285636A	1999-10-19
JP2011529777A	2011-12-15
JP3938225B2	2007-06-27
JP2009183897A	2009-08-20

See also references of EP 3495043A4

INABA, Yoshiyuki et al. (JP)

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