发明名称 |
METHOD OF CONCENTRATED SODIUM HYDROSULPHITE SOLUTION PRODUCTION |
摘要 |
FIELD: chemistry. ^ SUBSTANCE: invention refers to production technology of concentrated sodium hydrosulphite solution. Saturated aqueous sodium sulphite solution prepared or produced in reactor is brought to contact with droplet concentrated hydrochloric acid. Thereafter additional quantity of solid sodium sulphite is introduced with continued hydrochloric acid loading. Herewith pH value of reaction mixture is kept at least 6±0.1 until solid phase nonpassing into solution is formed. Then pH value of reaction mixture is reduced to 3.5-4.5, and process is stopped. ^ EFFECT: long life product. ^ 1 tbl, 7 ex |
申请公布号 |
RU2344072(C2) |
申请公布日期 |
2009.01.20 |
申请号 |
RU20070100454 |
申请日期 |
2007.01.09 |
申请人 |
KURSKIJ GOSUDARSTVENNYJ TEKHNICHESKIJ UNIVERSITET(KGTU) |
发明人 |
IVANOV ANATOLIJ MIKHAJLOVICH;AGEEVA EKATERINA VLADIMIROVNA |
分类号 |
C01B17/62;C01D5/14 |
主分类号 |
C01B17/62 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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