Recovery of sodium thiocyanate from industrial process...

Details Recovery of sodium thiocyanate from industrial process... Recovery of sodium thiocyanate from industrial process...

2008-01-01

2008-01-01

Langel, Wayne A. (Department: 1754)

Chemistry of inorganic compounds

Nitrogen or compound thereof

Carbon containing

C210S650000, C210S651000

Reexamination Certificate

active

10812586

ABSTRACT:
The present invention relates to a membrane-based nanofiltration process for separating sodium thiocyanate (NaSCN) from industrial solution containing impurities such as β-sulfopropionic acid, β-sulfopropionitrile, sodium sulfate and salts of iron and calcium in a single step to obtain a colorless aqueous solution for spinning of acrylic fiber in textile industry.

REFERENCES:
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patent: 4702805 (1987-10-01), Burkell et al.
patent: 5071563 (1991-12-01), Shiga et al.
patent: 5858240 (1999-01-01), Twardowski et al.
patent: 04321514 (1992-11-01), None
patent: 04338110 (1992-11-01), None
“Application of membrane separation impurity removal process in PAN production”. Yuan, Hua-bin; Jin, Zhen. Shihua Jishu Yu Yingyong, 20(6), 385-387, 391 (Chinese) 2002. (no month, Abstract only).

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