Study on The Post-treatment Process of Synthesis of 1,2-ethylenedithiol by Thiourea Method
[1]ZHANG Yadong,XING Junwei.Study on The Post-treatment Process of Synthesis of 1,2-ethylenedithiol by Thiourea Method[J].Journal of Zhengzhou University (Engineering Science),2009,30(02):23-26.
Copy
Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
30卷
Number of periods:
2009年02期
Page number:
23-26
Column:
Public date:
1900-01-01
- Title:
- Study on The Post-treatment Process of Synthesis of 1,2-ethylenedithiol by Thiourea Method
- Keywords:
- 1; 2-Ethanedithiol; thiourea; post-processing; Recycling
- CLC:
- -
- DOI:
- -
- Abstract:
- Through the determination of the solubility of thiourea and S-hydrocarbon isothiourea salts in solvent 95% ethanol, their content in the final reaction solution was determined, the amount of solvent was reduced, the post-treatment operation step of distillation and ethanol recovery was eliminated, and the recycling rate of solvent could reach more than 90%. According to the difference in solubility of Na2SO4 and NaBr in water, Na2SO4 and NaBr were separated from the aqueous phase of the reaction liquid by rotary evaporation, and the recovery rate of Na2SO4 could reach more than 95%. The composition of the oil phase was determined by gas chromatography-mass spectrometry, and the product with a purity of more than 99% was obtained by vacuum distillation, and the final yield could reach more than 70%. The kettle liquid was reduced by zinc powder to obtain a by-product dimercaptodiethyl sulfide.
- References:
- -
- Similar References:
Memo
-
Last Update:
1900-01-01