Vacuum and microwave-assisted grinding for obtaining cellulose flour and fine microcrystalline cellulose

It is the 1st time to use citric acid to substitute the ordinary swelling agent (glacial acetic acid) for synthesis of the cellulose triacetate upon heterogeneous esterification reaction for alpha cellulose.
Cellulosic fibers from cotton fibers were acetylated by heterogeneous reactions with citric acid as a swelling agent for the fibers as well as co-oxidizing agent, concentrated H2SO4 as a catalyst, and acetic anhydride. The resultant cellulose triacetate (CTA) yield was found to be 80%. The solubility test for the CTA's showed a clear solubility in chloroform, as well as the mixture of chloroform and methanol (9:1v/v) and vice versa for acetone. The degree of substitution of the CTA was identical to that for ordinary schemes and was confirmed by the NMR study.
Filters for gases and vapors, cleaning oil spills and industrial wastewater. Also, in plastic, metal, food, and textile industries. It has using with polyester to create smooth and shiny tracksuits. Also, it is used to manufacture polarizer films for LCD’s, overhead projector transparencies and photographic film.
Concerning prior art, Cellulosic fibers are acetylated by heterogeneous reactions with glacial acetic acid, concentrated H2SO4, and acetic anhydride. Theas chemical reagents are the most common one in the field of cellulose commercially all over the world.
Regarding potential application, Filters for gases and vapors, cleaning oil spills and industrial wastewater. Also, in plastic, metal, food, and textile industries. It has using with polyester to create smooth and shiny tracksuits. Also, it is used to manufacture polarizer films for LCD’s, overhead projector transparencies and photographic film.