US 11,926,742 B2
Method for preparing carbon black from pyrolysis char of waste tires by molten salt thermal treatment and product thereof
Hongyun Hu, Hubei (CN); Hua Tang, Hubei (CN); Aijun Li, Hubei (CN); Kang Xie, Hubei (CN); Yuhan Yang, Hubei (CN); Fu Yang, Hubei (CN); and Hong Yao, Hubei (CN)
Assigned to HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY, Hubei (CN)
Appl. No. 17/273,311
Filed by HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY, Hubei (CN)
PCT Filed May 15, 2020, PCT No. PCT/CN2020/090588
§ 371(c)(1), (2) Date Mar. 4, 2021,
PCT Pub. No. WO2020/233526, PCT Pub. Date Nov. 26, 2020.
Claims priority of application No. 201910417723.4 (CN), filed on May 20, 2019.
Prior Publication US 2021/0317318 A1, Oct. 14, 2021
Int. Cl. C09C 1/48 (2006.01)
CPC C09C 1/482 (2013.01) [C01P 2006/80 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method for preparing carbon black from pyrolysis char of waste tires by a molten salt thermal treatment, comprising:
(a) heating one group or two groups of a metal chloride salt group and a metal sulfate group to obtain a molten salt, wherein the metal chloride salt group comprises zinc chloride with a mass fraction of 60% to 100%, and the metal sulfate group comprises zinc sulfate with a mass fraction of 60% to 100%;
(b) adding pyrolysis char of waste tires into the molten salt and subjecting same to a molten salt thermal treatment under a preset reaction atmosphere to perform edulcoration on the pyrolysis char of the waste tires; and
(c) separating a reaction product to obtain a secondary molten salt and treated pyrolysis char of the waste tires after the reaction is completed, washing the treated pyrolysis char of the waste tires with hot water and drying same to obtain carbon black, recycling the secondary molten salt.