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Lab Study on Preparation of High Ethoxy Ethyl Cellulose

Liu Hui-chon

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Abstract

A two-step preparation technology of high ethoxy ethyl cellulose with etherification agent as diluent by orthogonal experiments has been reported. The structure of the product is characterized by use of IR and NMR (H). The best technology process is, for 1 mol cellulose, to add 16.2 mol of sodium hydroxide (50% sodium hydroxide solution) , at 32℃ for 3 h; 40mol ethyl chloride at 140℃ for 12 h. The ethoxy content of product obtained is up to 45. 8 %.

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What this paper is about

A two-step preparation technology of high ethoxy ethyl cellulose with etherification agent as diluent by orthogonal experiments has been reported. The structure of the product is characterized by use of IR and NMR (H). The best technology process is, for 1 mol cellulose, to add 16.2 mol of sodium hydroxide (50% sodium hydroxide solution) , at 32℃ for 3 h; 40mol ethyl chloride at 140℃ for 12 h. The ethoxy content of product obtained is up to 45. 8 %.

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Available abstract

A two-step preparation technology of high ethoxy ethyl cellulose with etherification agent as diluent by orthogonal experiments has been reported. The structure of the product is characterized by use of IR and NMR (H). The best technology process is, for 1 mol cellulose, to add 16.2 mol of sodium hydroxide (50% sodium hydroxide solution) , at 32℃ for 3 h; 40mol ethyl chloride at 140℃ for 12 h. The ethoxy content of product obtained is up to 45. 8 %.

Key concepts: Alkoxy group, Sodium hydroxide, Cellulose, Ethyl cellulose, Diluent, Sodium, Organic chemistry, Hydroxide

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