Process for production of pure glucose from cellulose
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United States of America Patent
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Nov 5, 2019
Grant Date -
Jul 26, 2018
app pub date -
Jul 22, 2016
filing date -
Jul 22, 2015
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Abstract
The present disclosure provides a process for production of glucose having purity greater than 98% from pretreated cellulosic biomass comprising 50-95% cellulose, using thermo-chemical and enzymatic treatments. The process of the disclosure involves mild acid and/or alkali treatment of the pretreated cellulosic biomass for production of treated cellulosic biomass residue comprising polysaccharides containing greater than 98% glucose. The treatment results in high purity cellulose that is highly amenable to enzymatic hydrolysis and yields glucose having purity greater than 98%. The process of the disclosure also involves membrane separation of enzymes and oligosaccharides for recycling and separation of glucose to avoid product feedback inhibition.
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