Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of synthetic method of stannous chloride

A technology of stannous chloride and a synthesis method, applied in the electrolysis process, electrolysis components and other directions, can solve the problems of large amount of sewage, waste of resources, difficulty in recycling tin-containing slag, etc., and achieve the effect of overcoming slow reaction and reliable process

Active Publication Date: 2018-02-16
云南锡业锡化工材料有限责任公司
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the waste of resources, high cost, large amount of sewage, difficult recovery of tin-containing slag, leakage of toxic and harmful gases such as chlorine gas in the existing stannous chloride synthesis method, and provide a method of electrolysis, concentration, purification, A new method for producing tin protochloride in processes such as crystallization, no harmful gases such as chlorine gas and hydrogen chloride are produced in the electrolysis process, and at the same time, a synthesis method of stannous chloride other than the concentrated hydrochloric acid method and the chlorine gas method is provided, which is operable Strong, low cost, environmentally friendly, high security and other advantages

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Using 400 g to cast into two pieces with an effective area of ​​4dm 2 The polar plate is put into the cathode and anode electrolytic cells separated by anion exchange membrane respectively, a 5wt% hydrochloric acid solution prepared with dilute hydrochloric acid is added in the anode tank, and a 6wt% hydrochloric acid solution prepared with dilute hydrochloric acid is added in the cathode tank. Input 1.9A / dm 2 direct current, electrolytic reaction at room temperature for 24h, to obtain a stannous chloride electrolyte containing 6.9wt% tin and 1.8wt% hydrochloric acid, and the electrolytic solution is put into a reactor equipped with 10g tin flakes and concentrated to obtain a specific gravity of 2.0g / cm 3 The concentrated solution, the concentrated solution is crystallized and dehydrated to obtain white crystals of stannous chloride with a main content of 99.2%, and other product indicators comply with HG / T 2526-2007.

Embodiment 2

[0016] 400 g metal tin is cast into two pieces with an effective area of ​​4dm 2 The polar plates are placed in the cathode and anode electrolytic cells separated by anion exchange membrane respectively, a 6wt% hydrochloric acid solution prepared with dilute hydrochloric acid is added to the anode tank, and a 7%wt hydrochloric acid solution prepared with dilute hydrochloric acid is added to the cathode tank . Pass through the direct current of 1.8A, electrolysis reaction 24h at room temperature, obtain the stannous chloride electrolyte solution that contains tin as 6.6wt%, and hydrochloric acid is 2.25wt%, and electrolyte is put into the reactor that 10g tin plate is housed and concentrates , to obtain a specific gravity of 2.05g / cm 3 The concentrated solution, the concentrated solution is crystallized and dehydrated to obtain white crystals of stannous chloride with a main content of 99.15%, and other product indicators comply with HG / T 2526-2007.

Embodiment 3

[0018] 400 g metal tin is cast into two pieces with an effective area of ​​4dm 2 The polar plate is put into the cathode and anode electrolytic cells separated by anion exchange membrane respectively, a 9wt% hydrochloric acid solution prepared with dilute hydrochloric acid is added in the anode tank, and a 10wt% hydrochloric acid solution prepared with dilute hydrochloric acid is added in the cathode tank. Input 1.9A / dm 2 direct current, electrolytic reaction at room temperature for 24h, to obtain the stannous chloride electrolyte containing 5.8wt% tin and 2.9wt% hydrochloric acid, the electrolytic solution is put into a reactor equipped with 10g tin flakes to concentrate, and the specific gravity is 2.1g / cm 3 The concentrated solution, the concentrated solution is crystallized and dehydrated to obtain white crystals of stannous chloride with a main content of 99.27%, and other product indicators comply with HG / T 2526-2007.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a method for synthesizing stannous chloride through a membrane electrolysis method and belongs to the technical field of inorganic chemical engineering. A catholyte and an anolyte of certain concentrations are prepared through diluted hydrochloric acid. A cathode plate and an anode plate which are made of refined tin are put into a cathode frame and an anode frame of an electrolytic cell correspondingly. Under the action of direct currents, anode tin loses electrons, stannous ions are formed and enter the anolyte to be combined with chlorine ions, and a stannous chloride electrolyte is formed. The stannous chloride electrolyte is put into a reactor containing a certain amount of tin for concentration. The stannous chloride is obtained after a concentrated solution is subjected to the purification, crystallization and solid-liquid separation processes. According to the novel method provided by the invention, the stannous chloride is generated through electrolysis, concentration, purification, crystallization and other processes, and chlorine gas, hydrogen chloride and other harmful gases are not generated in the electrolysis process. Meanwhile, the method for synthesizing the stannous chloride besides a concentrated hydrochloric acid method and a chlorine gas method is provided. The method for synthesizing the stannous chloride has the advantages of being high in operability, low in cost, environmentally friendly, high in safety and the like and can be used for industrialization popularization.

Description

technical field [0001] The invention relates to a method for synthesizing stannous chloride by dilute hydrochloric acid diaphragm electrolysis, which belongs to the technical field of inorganic chemical industry. Background technique [0002] Stannous chloride (SnCl 2 2H 2 O) is an important chemical raw material and chemical product, which is widely used in tin electroplating, dyes, spices, mirror making, ultra-high pressure lubricating oil, bleaching and other industries, and is used as reducing agent, mordant, decolorizing agent and analytical reagent. In the determination of silver, arsenic, molybdenum, mercury, etc. At present, the method of industrialized production of stannous chloride is mainly: the method of producing stannous chloride with concentrated hydrochloric acid: put the raw material tin into the reaction pot, slowly add industrial hydrochloric acid with a content greater than 31%wt, and react naturally for a certain period of time, then heat and concentr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/26
CPCC25B1/26
Inventor 李伟贾庆明胡洋唐黎魏兵郭应辉
Owner 云南锡业锡化工材料有限责任公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com