molecular sieve xh-11

molecular sieve xh-11 Also known as anhydrous alcohol, refers to the ethanol concentration is greater than 99% (mass). Mainly used as solvent for cosmetics, pharmaceutical and other industries. Supreme general of industrial ethanol concentration of 95%. To obtain anhydrous ethanol, may be further desiccant for insulated glass with the following three ways: (1) treated with lime industrial ethanol, make water into insoluble calcium hydroxide, ethanol, and then steamed out with sodium metal is dry, it is the old way. (2) the azeotropic distillation dehydration is a commonly used method in industry at present. Generally with benzene as azeotropic agent, steamed out of a boiling rectification tower over the course of the first, benzene, ethanol and water ternary azeotrope, again in the second azeotropic distillation steamed out binary azeotrope of benzene and ethanol, the steam out of the anhydrous ethanol in alcohol distillation. Because of the benzene in the product and about 0.5% (mass) of the residual, and benzene toxicity is bigger, has developed in recent years is pentane or hexane instead benzene as azeotropic agent. (3) with ion exchange agent or molecular sieve dehydration, then distillation.