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The production of hydroxyethyl cellulose involves several steps, including the preparation of cellulose, etherification of hydroxyl groups, purification, and drying. The starting material for HEC production is typically wood pulp or cotton linters The starting material for HEC production is typically wood pulp or cotton linters The starting material for HEC production is typically wood pulp or cotton linters The starting material for HEC production is typically wood pulp or cotton lintershydroxyethyl cellulose manufacturers. These raw materials are first converted into alkali cellulose by treating them with sodium hydroxide solution. The alkali cellulose is then reacted with ethylene oxide in the presence of a catalyst to produce HEC. The final product is purified and dried to obtain the desired viscosity and purity.