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Principle of One-Step Preparation and Development of Highly Substituted Ethyl Cellulose

Lei Xiao

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Abstract

The reaction mechanism and technology of preparation of the title one-step highly substituted cellulose with toluene as diluent is developed by orthogonal experiments. The structure of product is characterized by use of IR and H 1 NMR. It is found that the optimum technical conditions are: (based on 27 grams of cellulose) toluene 180 g, concentration of NaOH solution 60% (m/m), ethyl chloride 477.5 g, at 140 ℃for 13 h, the ethoxy content can be up to 44.8% (m/m).

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What this paper is about

The reaction mechanism and technology of preparation of the title one-step highly substituted cellulose with toluene as diluent is developed by orthogonal experiments. The structure of product is characterized by use of IR and H 1 NMR. It is found that the optimum technical conditions are: (based on 27 grams of cellulose) toluene 180 g, concentration of NaOH solution 60% (m/m), ethyl chloride 477.5 g, at 140 ℃for 13 h, the ethoxy content can be up to 44.8% (m/m).

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Available abstract

The reaction mechanism and technology of preparation of the title one-step highly substituted cellulose with toluene as diluent is developed by orthogonal experiments. The structure of product is characterized by use of IR and H 1 NMR. It is found that the optimum technical conditions are: (based on 27 grams of cellulose) toluene 180 g, concentration of NaOH solution 60% (m/m), ethyl chloride 477.5 g, at 140 ℃for 13 h, the ethoxy content can be up to 44.8% (m/m).

Key concepts: Toluene, Cellulose, Diluent, Ethyl cellulose, Materials science, Alkoxy group, Organic chemistry, Proton NMR

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