Title:
SYSTEM AND TECHNOLOGY FOR TREATING HYDROGEN CHLORIDE GENERATED BY HYDROLYSIS OF CHLOROSILANE
Document Type and Number:
WIPO Patent Application WO/2021/051549
Kind Code:
A1
Abstract:
A system and technology for treating hydrogen chloride generated by hydrolysis of chlorosilane. The system comprises a pretreatment system and a separation system, wherein the pretreatment system comprises a washing unit and a re-purification unit, one end of the washing unit is connected to the re-purification unit, and the other end of the washing unit is connected to the separation system. Hydrogen chloride gas generated after hydrolysis of chlorosilane firstly enters the washing unit; supercooled saturated concentrated hydrochloric acid is sprayed into the washing unit from the top of the washing unit for washing the hydrogen chloride gas; then the washed and purified hydrogen chloride gas enters the separation system from the upper portion of the washing unit; a supercooled saturated concentrated hydrochloric acid product for washing flows out of the washing unit and enters the re-purification unit for purification so as to obtain impurity-removed concentrated hydrochloric acid; and the impurity-removed concentrated hydrochloric acid enters the washing unit again for circularly washing the hydrogen chloride generated by hydrolysis of chlorosilane. Compared with the prior art, the system has the advantages of no generation of new wastewater in the whole technological process and better environmental protection.
More Like This:
Inventors:
ZHOU SHUGUANG (CN)
QIN LONG (CN)
LI PEIGUO (CN)
YU SHENLUAN (CN)
JIANG SHENGBAO (CN)
ZHAN BO (CN)
YE ZHIFENG (CN)
QIN LONG (CN)
LI PEIGUO (CN)
YU SHENLUAN (CN)
JIANG SHENGBAO (CN)
ZHAN BO (CN)
YE ZHIFENG (CN)
Application Number:
PCT/CN2019/117423
Publication Date:
March 25, 2021
Filing Date:
November 12, 2019
Export Citation:
Assignee:
ZHEJIANG XINAN CHEMICAL IND GROUP CO LTD (CN)
International Classes:
C01B7/07; B01D46/00; B01D46/54; B01D53/14; B01D53/18
Foreign References:
| CN203222476U | 2013-10-02 | |||
| CN101423193A | 2009-05-06 | |||
| CN109650339A | 2019-04-19 | |||
| CN101343037A | 2009-01-14 | |||
| CN101003546A | 2007-07-25 | |||
| US5330735A | 1994-07-19 |
Other References:
CHEN XIAO-JUAN: "Study on Organic Silicon Wastewater Treatments", NINGXIA JOURNAL OF AGRICULTURE AND FORESTRY SCIENCE AND TECHNOLOGY, vol. 53, no. 1, 10 January 2012 (2012-01-10), pages 79 - 81, XP055792561, ISSN: 1002-204X
Attorney, Agent or Firm:
GUANGZHOU SHENGWOYUAN PATENT AGENCY CO., LTD.. (CN)
Download PDF:
Previous Patent: READ-WRITE CIRCUIT AND READ-WRITE METHOD FOR MEMRISTOR
Next Patent: ANTI-OVERWRITE CIRCUIT AND METHOD FOR MEMRISTOR
Next Patent: ANTI-OVERWRITE CIRCUIT AND METHOD FOR MEMRISTOR