Process for manufacturing cellulose acetate
AssigneeNihon Zaikei Kabushiki Kaisha
InventorsShunichi Matsuo, Takatsugu Takamura
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Abstract
The invention provides a process for manufacturing at low cost cellulose acetate, which is useful as a biodegradable plastic, using corncob meal which has hitherto been thrown away as a raw material. More specifically, the invention provides a process for manufacturing cellulose acetate, which comprises the steps of: steaming corncob meal at a temperature of 150 to 250° C. and a pressure of 20 to 29 MPa; filtering the steamed corncob meal to obtain a solid product; and dehydrating and acetylating by adding acetic anhydride and sulfuric acid to the solid product. The steaming is preferably carried out by using a pressure vessel and the filtering is preferably carried out by using a filtering device.
Claims9
A process for manufacturing cellulose acetate, comprising the steps of:
- steaming a corncob meal at a temperature of 150 to 250° C. and a pressure of 20 to 29 MPa;
- filtering the steamed corncob meal to obtain a solid product;
- and
- dehydrating and acetylating by adding acetic anhydride and sulfuric acid to the solid product.
Dependencies are inferred from the claim text.