Production method 1: Cellulose is There are abundant natural polymers in the world, and the raw materials come from wood, cotton batting, cotton linters, hay, wheat straw, cattails, hemp, mulberry bark, mulberry bark and bagasse. In our country, due to insufficient natural resources, 70% of cellulose raw materials come from non-wood resources. In my country, the average cellulose content of coniferous and broad-leaved plant materials is about 43 to 45%; the average cellulose content of grass stems is around 40%.
The industrial production method of cellulose is to use sulfite aqueous solution or The alkaline solution steams green plant raw materials, mainly to remove lignin, which are called sulfite method and alkali method respectively. The raw materials obtained are called sulfite pulp and soda pulp. The residual lignin is then further removed through bleaching, and the resulting bleached pulp can be used to make paper. After further removing hemicellulose, it can be used as a raw material for cellulose compounds.
Production method two: Pour fibrous plant raw materials and strong oxidants into a thick consistency to makeα-cellulose, and then dissolve the cellulose to partially acidolyze the cellulose, and then remove the non-crystalline part and purify it.
Production method three: The selected industrial raw pulp cardboard is decomposed, and then fed into the sulfuric acid that has been added with 1% to 10% (the dosage is 5% to 10% ) reaction tank to carry out temperature-raising hydrolysis reaction, the temperature is 90~100℃, the hydrolysis reaction time is 0.5~2h, after the reaction is completed, it is refrigerated and sent to the neutralization tank, adjusted to neutralization with caustic soda, and filtered to anaerobic particles The sludge is dried at 80-100℃ and finally crushed to obtain products.
Production method four: cellulose made from raw pulp paper or cotton wadding pulp. It is specially formulated after bleach treatment and mechanical dispersion.
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