Råvaror för diacetatbogs

The raw materials mainly include high-purity cellulose (derived from wood pulp or cotton linters), acetic anhydride, acetic acid, catalysts (such as sulfuric acid), etc. The cellulose needs to be crushed and treated with alkali (to remove impurities such as lignin and hemicellulose) to obtain -cellulose (purity > 95%), and then dried to control the water content (usually < 5%) För att undvika hydrolys sidoreaktioner i acetyleringsreaktionen.