Pyrolysis gas typically contains water 400-700ppm these water when ice cryogenic separation operation, while at high pressure and low temperature, water also with light alkanes (such as: CH4, C2H6 and C3H8, etc.) generate hydrocarbon hydrate as white crystals. The hydrocarbon hydrate ice crystals can lead to clogged pipes and equipment, molecular sieve, resulting in parking. Thus, the oil in the pyrolysis gas before cryogenic separation must be dried depth, so that the water content of the pyrolysis gas is reduced to less than 5ppm (i.e., its dew point below -60 ℃). Now widely recognized as the most widely used and desired depth of 3A zeolite molecular sieve adsorbents dried, Zalantun sieve, since it only cracked gas adsorbed water molecules, does not adsorb large hydrocarbon molecules (eg: C2H6, C2H4 , C3H8 and C3H6, etc.), Hailar molecular sieve, which prevents internal olefin compound in the zeolite pores of coke, thus prolonging the service life of the adsorbent. Isopropyl alcohol is to produce an important chemical raw materials and organic solvents, industrial production process mixed waste a lot of isopropyl alcohol and water, isopropyl alcohol and water separation is significant. Industrial processes require high purity isopropyl alcohol, isopropyl alcohol and water at atmospheric pressure while an azeotropic formed at 80.4 ℃, wherein the isopropanol content is 87.9%, using ordinary distillation can not be obtained with a purity higher than an azeotropic composition of isopropanol. Describes the conventional processing method for producing anhydrous isopropanol (water content less than 0.5%) is by azeotropic distillation, extraction distillation method, Huolinguole molecular sieves, Pervaporation, salt extraction azeotropic distillation method etc., but these methods have to add another one organic solvent, complex process, equipment investment, high energy consumption characteristics. 3A molecular sieve ideas put forward by preparing anhydrous isopropyl alcohol. Confirmed by experiments 3A molecular sieve regeneration conditions are: under conditions of vacuum degree -0.095Mpa, regeneration temperature is 250 ℃, regeneration time less than three hours. According to the design of the experimental apparatus regeneration conditions set set adsorption and regeneration as a whole, and to determine when using octanol as a heating medium for heating the regeneration device, to be controlled octanol pressure of 0.5Mpa (gauge pressure). Sieve | molecular sieve yakeshi | new molecular sieves (high merchant) by the Shanghai new molecular sieve Limited. Shanghai new molecular sieve Limited (www.molsionms.com) in this area poured elemental boundless enthusiasm and passion, new molecular sieve has been customer-centric, for customers to create the concept of value, quality, service to win the market, sincerely we hope to cooperate with the community to create success, to create brilliant. Related businesses welcome inquiries, contact: Pan.