Summary of the dangers of molecular sieve xh-7

Health hazard: the goods for the central nervous system inhibitors. First cause excitement, then inhibition. Develops in oral acute poisoning: molecular sieve xh-7 acute poisoning. Generally can be divided into the excitement, four stage hypnosis, anesthesia, and suffocation. Into the third or fourth stage, patients with loss of consciousness, pupil dilation, irregular breathing, shock, heart failure and stop breathing cycles. Chronic effects: molecular sieve dryer high concentration of the goods in the production of medium and long-term contact can cause nose, eyes, mucous membrane irritation, and headache, dizziness, fatigue, easily excited, tremor, nausea, etc. Found for a long time can cause multiple neuropathy, chronic gastritis, fatty liver, liver cirrhosis, myocardial damage and organic psychosis and so on. Long-term exposure can cause dry skin, desquamation, cracked and dermatitis.

Combustion hazard: the goods flammable, stimulative.

The kinds of molecular sieve xh-7

molecular sieve xh-7 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 dryer 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.

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.

Anti-crush strength of the catalyst and molecular sieve methods

Because of different shape and molecular sieve drying, different stress points, said the crush strength of the ways are different. Usually divided into axial (or normal phase) Crushing strength (N / cm2), radial (or lateral phase) Crushing strength (N / cm) and the point Crushing strength (N /%). Where the former surface contact. The latter two are in line contact and point contact, respectively mouth (axis) ,. (Diameter) and. (Dot) said. Strip, ring, shaped spokes reminder
Agents and molecular sieve xh-7 with radial crush strength is represented by dots and spherical crush strength is expressed.
Catalytic Jing large particle size or carrier, such as Raschig rings, a spherical molecular sieve, the board side of the test method can be used to mean value. Small particle size catalyst, is preferably used stacking strength meter, deep extent stacked on top of a volume of the sample under pressure chipping 'as the catalyst for the fine particles, the average number of single V Hang crush strength of the catalyst is not important. Sometimes probably a few percent of the crushing pressure will cause a surge in the catalyst bed was forced to stop.