US 11,938,527 B2
Process for the purification of waste materials or industrial by-products comprising chlorine
Alexander Kehrmann, Münster (DE); Jan Hohlmann, Oberhausen (DE); Carsten Nass, Kalkar (DE); Gerhard Auer, Krefeld (DE); Christian Adam, Berlin (DE); Christopher Hamann, Berlin (DE); and Dirk Stolle, Berlin (DE)
Assigned to amaTEQ Holding GmbH, Münster (DE)
Appl. No. 16/641,966
Filed by amaTEQ Holding GmbH, Münster (DE)
PCT Filed Sep. 4, 2018, PCT No. PCT/EP2018/073761
§ 371(c)(1), (2) Date Feb. 25, 2020,
PCT Pub. No. WO2019/043261, PCT Pub. Date Mar. 7, 2019.
Claims priority of application No. 17189174 (EP), filed on Sep. 4, 2017.
Prior Publication US 2020/0222954 A1, Jul. 16, 2020
Int. Cl. B09B 3/40 (2022.01); C01G 9/02 (2006.01); C01G 9/04 (2006.01); C01G 9/08 (2006.01); C04B 7/36 (2006.01); C05D 9/00 (2006.01); C21B 15/00 (2006.01); C21C 5/56 (2006.01); C22B 1/00 (2006.01); C22B 1/08 (2006.01); C22B 7/00 (2006.01); C22B 7/02 (2006.01); C22B 13/02 (2006.01); C22B 19/30 (2006.01); C25C 1/16 (2006.01)
CPC B09B 3/40 (2022.01) [C01G 9/02 (2013.01); C01G 9/04 (2013.01); C01G 9/08 (2013.01); C04B 7/365 (2013.01); C05D 9/00 (2013.01); C21B 15/006 (2013.01); C21C 5/565 (2013.01); C22B 1/005 (2013.01); C22B 1/08 (2013.01); C22B 7/002 (2013.01); C22B 7/02 (2013.01); C22B 13/025 (2013.01); C22B 19/30 (2013.01); C25C 1/16 (2013.01); C21B 2200/00 (2013.01)] 18 Claims
 
1. A process for the purification of waste materials or industrial by-products comprising chlorine (B), the process comprising the steps of:
a) preparing a composition (C) by blending or mixing waste materials or industrial by-products comprising chlorine (B) with one or more materials comprising heavy metals (HM);
b) reacting (B) and (HM) by thermal treatment of (C);
c) separating evaporated heavy metal chloride compounds (HMCC); and
d) obtaining a solid material after the thermal treatment step, wherein:
the heavy metals (HM) are one or more from the following set of elements: Zn, Pb, Hg, Cu, Cd, Tl, In, Sn, Ni, Co;
the thermal treatment is carried out at a temperature of 500-1200° C. and under a non-oxidizing atmosphere;
the materials comprising heavy metals (HM) and the waste materials or industrial by-products comprising chlorine (B) are mixed or blended in the presence of water, with 2-50% by mass of water being present in the composition (C); and:
a) a ratio of the materials comprising heavy metals (HM) to the waste materials or industrial by-products comprising chlorine (B) is chosen so that a chlorine content of the composition (C) is between 100 and 150% of an amount necessary for a stoichiometric conversion of the heavy metals (HM) in the materials comprising heavy metals (HM) into chlorides; or
b) the ratio of the materials comprising heavy metals (HM) to the waste materials or industrial by-products comprising chlorine (B) is chosen so that the chlorine content of the composition (C) is between 80 and 100% of the amount necessary for a stoichiometric conversion of the zinc in the materials comprising heavy metals (HM) into chlorides.