4A molecular sieve is a kind of potassium-sodium aluminosilicate with LTA-type skeleton structure which is composed of silicon-oxygen and aluminum-oxygen tetrahedrons.The main crystal hole of the 4A molecular sieve is an eight-membered ring structure, and the crystal pore size is 4Å (0.4nm).It can adsorb water, methanol, ethanol, hydrogen sulfide, sulfur dioxide, carbon dioxide, ethylene and propylene, but does not adsorb any molecule with diameter greater than 4A (including propane). Its selective adsorption performance for water is higher than that of any other molecule.It is one of the largest molecular sieves varieties in industry.It is widely used in the drying of gases and liquids, and also in the refining and purification of some gases or liquids, such as the preparation of argon.
With pungent smell,chloroacetyl chloride, also known as chloroacetyl chloride, is a colorless transparent liquid organic compound.It is an important reactive acylating agent and organic synthesis intermediate, widely used in nitrogen based acids, pesticides, pharmaceuticals, dyes, additives, extraction solvents, refrigerants, fire extinguishing agents, lubricating oil additives, etc. Currently, it is particularly widely used in the field of pesticides.
Monochloroacetic acid,industrially also known as Chloroacetic acid ,MCA or MCAA, is a white or pale yellow crystals carboxylic acid with irritant smell mainly used in manufacturing a variety of products including carboxymethyl cellulose,herbicides,pharmaceuticals,dyes,cosmetics,plastic stabilizers,anesthetics,tranquilizers and amphoteric surfactants as one of the fine chemical intermediates.
Methyl chloroacetate is mainly used in the synthesis of insecticides such as dimethoate, intermediate thiophosphates of dimethoate, oxythiophosphates, and chloroacetamide in pesticides. As an organic synthetic raw material, it is also used in the preparation of pharmaceuticals, adhesives, surfactants, and can also be used as a solvent.
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