CN Patent

CN103922292A — 硫代硫酸钠的制备方法

Assigned to Liaoning Petrochemical Vocational and Technical College · Expires 2014-07-16 · 12y expired

What this patent protects

本发明提供一种硫代硫酸钠的制备方法,包括对硫代硫酸钠溶液进行过滤,和对过滤后硫代硫酸钠溶液进行加热、冷却和结晶。本发明是在pH=11,温度为100℃的条件下,将质量浓度为21%的饱和亚硫酸钠溶液与硫磺粉按照化学反应的计量比进行混合加热,并保持微沸状态25min后停止加热,制得硫代硫酸钠溶液。本发明通过控制溶液的pH值、亚硫酸钠溶液的浓度,使制备硫代硫酸钠的时间缩短至约25min;亚硫酸钠转化率提高;制备的硫代硫酸钠纯度高,操作方便,费用低。

USPTO Abstract

本发明提供一种硫代硫酸钠的制备方法,包括对硫代硫酸钠溶液进行过滤,和对过滤后硫代硫酸钠溶液进行加热、冷却和结晶。本发明是在pH=11,温度为100℃的条件下,将质量浓度为21%的饱和亚硫酸钠溶液与硫磺粉按照化学反应的计量比进行混合加热,并保持微沸状态25min后停止加热,制得硫代硫酸钠溶液。本发明通过控制溶液的pH值、亚硫酸钠溶液的浓度,使制备硫代硫酸钠的时间缩短至约25min;亚硫酸钠转化率提高;制备的硫代硫酸钠纯度高,操作方便,费用低。

Drugs covered by this patent

Patent Metadata

Patent number
CN103922292A
Jurisdiction
CN
Classification
Expires
2014-07-16
Drug substance claim
No
Drug product claim
No
Assignee
Liaoning Petrochemical Vocational and Technical College
Source
FDA Orange Book + USPTO grounding via Google Patents

Bibliographic data sourced from FDA Orange Book + USPTO public records. Plain-English summary generated by AI grounded in source text. Patent term extensions (PTR, SPC, pediatric) may shift the effective expiry. Not legal advice.

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