Recovery of sodium thiocyanate from industrial process solution using nanofiltration technique

摘要

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