Hemicelluloses separation from caustic-containing process stream by ultrafiltration

ABSTRACT

The present work aimed to study the performance of ultrafiltration (UF) membranes for hemicelluloses separation, from a caustic-containing highly alkaline, cellulose purification solvent stream of viscose rayon production process, and to understand the membrane behaviour, effect of multiple use cycle, identify potential performance drawbacks and propose possible solutions. Screening experiments showed that an UF membrane with a nominal molecular weight cut-off value of 3 kDa can be used to separate hemicelluloses from alkaline process stream. UF membrane was found to be prone to performance deterioration with time due to fouling. Higher feed temperature helped in improving the membrane flux values while maintaining hemicelluloses retention.

KEYWORDS:

• Alkali-resistant membranes
• hemicelluloses
• ultrafiltration
• viscose

Funding

The authors duly acknowledge the support from M/S. Permionics, Vadodara, India, and Fibre Research Center, Birla Cellulosic, Kharach, Bharuch, India, for their support for this work.

Additional information

Funding

The authors duly acknowledge the support from M/S. Permionics, Vadodara, India, and Fibre Research Center, Birla Cellulosic, Kharach, Bharuch, India, for their support for this work.