The kinds of molecular sieve xh-7

molecular sieve dryer has two kinds of natural zeolite and synthetic zeolites. (1) most of the natural zeolite by volcanic tuff and gray matter in the Marine sedimentary rocks coagulation or react to form in the lacustrine environment. Has been found that there are more than 1000 zeolite ore, more important is 35, common clinoptilolite and mordenite, erionite and ling zeolite, etc. Mainly distributed in the United States, Japan, France and other countries, China is also found that there is a lot of mordenite and clinoptilolite deposits, Japan is the largest country in the production of natural zeolite. (2) by natural zeolite resource constraints, starting in the 1950 s, a large number of the synthetic zeolite.

Commodity molecular sieve xh-7 common prefix digital classifying crystalline structure of different molecular sieves, such as 3 a, 4 a, 5 a molecular sieve. 4 A type or class A in the table, aperture 4 A. . Type A molecular sieve as containing Na + Na - A, if one was Na + K + displacement, pore diameter of about 3 A; For type 3 a molecular sieve; If there is more than A third in the Na - A Na + Ca2 + displacement, pore diameter of about 5 A; , that is, the type of 5 a molecular sieve.