Preparation of molecular sieve xh-5

Until the 1930 s, fermentation is the only industrial molecular sieve xh-5 production methods. With the rapid development of petrochemical industry, synthesis of ethanol production is more and more big. But in the synthesis of ethanol mixed heterogeneous high carbon molecular sieve xh-9, to the person's senior neural paralysis, not suitable for used as a beverage, food, medicine, spices, and so on. Therefore, even in the petroleum chemical industry developed countries, fermentation of ethanol still occupies certain proportion.