Production method for high-viscosity high-purity carboxymethylcellulose by using bamboo pulp as raw material
A technology of carboxymethyl cellulose and production method, which is applied in the field of producing high-viscosity and high-purity carboxymethyl cellulose, can solve problems such as complicated procedures, high viscosity, and environmental pollution, and achieve rich sources, low production costs, and low production costs. Reduced effect
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[0019] Example 1 (see the corresponding raw materials and parts by weight of Example 1 in the table): Add 5 parts by weight of bamboo pulp powder (the same below) into the reactor, add 100 parts of 90% aqueous ethanol by volume, and stir for 10-20 Minutes, add 7 parts of NaOH, prepare NaOH into an aqueous solution with a concentration of 30% by mass, stir for 1 hour at normal pressure and 20-30℃ to generate alkalized cellulose, then add 9 parts of chloroacetic acid, and control the reaction temperature at 60℃ , Etherification reaction for 2 hours, cool to room temperature, neutralize to neutrality with 80% acetic acid aqueous solution by volume, and then filter with suction to obtain yellow ether compound. After conventional washing and pressure filtration, the washing volume ratio is 80% Washed with ethanol 4 times, then washed with 95% ethanol once, dried and crushed to obtain white fibrous powder, which is high-viscosity and high-purity carboxymethyl cellulose. After self-tes...
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