US 9,808,795 B2
Methods for reprocessing used catalysts
Martin Pley, Memmelsdorf (DE)
Assigned to Tropinon Enterprises Ltd., Nicosia (CY)
Appl. No. 15/306,884
Filed by TROPINON ENTERPRISES LTD., Nicosia (CY)
PCT Filed Feb. 3, 2015, PCT No. PCT/EP2015/000209
§ 371(c)(1), (2) Date Oct. 26, 2016,
PCT Pub. No. WO2015/165557, PCT Pub. Date Nov. 5, 2015.
Claims priority of application No. 14001537 (EP), filed on Apr. 30, 2014.
Prior Publication US 2017/0050183 A1, Feb. 23, 2017
Int. Cl. B01J 38/68 (2006.01); C22B 7/00 (2006.01); B01J 38/48 (2006.01); B01J 38/60 (2006.01); B01J 38/64 (2006.01); B01J 23/22 (2006.01); B01J 23/28 (2006.01); B01J 23/30 (2006.01); B01J 23/92 (2006.01); C22B 1/24 (2006.01); C22B 34/34 (2006.01); C22B 34/36 (2006.01)
CPC B01J 38/68 (2013.01) [B01J 23/22 (2013.01); B01J 23/28 (2013.01); B01J 23/30 (2013.01); B01J 23/92 (2013.01); B01J 38/485 (2013.01); B01J 38/60 (2013.01); B01J 38/64 (2013.01); C22B 1/24 (2013.01); C22B 7/007 (2013.01); C22B 7/008 (2013.01); C22B 7/009 (2013.01); C22B 34/345 (2013.01); C22B 34/365 (2013.01); Y02P 10/214 (2015.11)] 14 Claims
 
1. A method for reprocessing a used catalyst including an oxygen-containing compound of titanium, vanadium, and at least one of the elements molybdenum or tungsten, comprising at least step (T4):
(T4) heating of a solid fraction comprising an oxygen-containing compound of titanium and at least one of the elements tungsten or molybdenum in the presence of a vanadium compound at a temperature ≧200° C.,
and further comprising steps (T1) through (T3) prior to step (T4):
(T1) bringing into contact of the used catalyst with an aqueous base, thus obtaining a water-containing mass, which comprises:
a liquid fraction comprising a water-soluble material, and
a solid fraction, which comprises a water-insoluble material;
(T2) separation of the solid fraction from the liquid fraction of step (T1);
(T3) bringing into contact of the separated solid fraction of step (T2) with a vanadium compound; wherein the aqueous base of step (T1) is selected from the group composed of an aqueous alkali hydroxide, an aqueous alkaline earth hydroxide, an aqueous alkali hydrogen carbonate, an aqueous alkali carbonate, an aqueous alkaline earth carbonate, an aqueous C1-C4 alkylamine, an aqueous amino alcohol, and a mixture of at least two of the aqueous bases thereof.