Sulfur dioxide urea is an important chemical intermediate used in organic synthesis and pharmaceutical manufacturing, among other fields. The following is the process flow for producing sulfur dioxide urea:

Preparation of ammonium sulfite solution: Ammonium sulfite is added to water, heated and stirred until it completely dissolves, preparing an ammonium sulfite solution.

Preparation of thiourea: Ammonium thiocyanate is added to the ammonium sulfite solution, stirred and heated to a certain temperature, and thiourea is produced. The reaction equation is as follows:

(NH4)2SO3 + NH4SCN → S(NH2)2 + 2NH4HSO3

Preparation of sulfur dioxide urea: Thiourea is added to a dilute hydrochloric acid solution, heated to a certain temperature, and sulfur dioxide urea is produced. The reaction equation is as follows:

S(NH2)2 + 2HCl → SO2(NH2)2 + 2NH4Cl

Purification of sulfur dioxide urea: The reaction-produced sulfur dioxide urea is purified and the desired product is obtained through steps such as crystallization, filtration, and washing.

It should be noted that safety should be taken into consideration during the preparation process to avoid contact with toxic chemicals, while controlling reaction conditions to obtain high-purity sulfur dioxide urea.

Buske New Material Technology (Shandong) Co., Ltd specializes in the professional production of sulfur dioxide urea. Welcome to inquire. 

Email: buske@buskesd.com,

Phone: +86 0546-8270002.