Inorganic Chemicals

Phosphorus oxychloride (molecular formula: POCl3), also known as phosphoryl chloride, phosphorus oxychloride and phosphorus oxychloride, is an industrial chemical raw material and a colorless and transparent liquid. It has a pungent odor. Smoke violently in humid air. Relative density 1.67. Melting point: 1.25 ℃. Boiling point 105.1 ℃. It decomposes in water and ethanol to form phosphoric acid and hydrogen chloride. When a large amount of water is poured suddenly, a violent reaction can occur. POCl3 reacts with water and alcohol to form phosphoric acid or phosphate ester, such as o = PCl3 + 3H2O → o = P (OH) 3 + 3hcl. If alcohol replaces water in the reaction, the product is trialkyl phosphate. Such reactions are often carried out in pyridine or amine to absorb the generated HCl and promote the reaction. Under the catalysis of Lewis acid such as manganese chloride, POCl3 is co heated with excess phenol (aroh) to obtain triaryl phosphate. For example, when reacting with phenol: 3c6h5oh + o = PCl3 → o = P (oc6h5) 3 + 3hcl, phosphorus oxychloride is a Lewis base and will form adducts with many Lewis acids. For example, the adduct (POCl3 · AlCl3) formed by the reaction with titanium tetrachloride: cl3p + - O − + TiCl4 → cl3p + - O - − TiCl4 and aluminum chloride is very stable, so POCl3 is also used to remove AlCl3 from the product of Friedel Crafts reaction. In the presence of AlCl3, POCl3 reacts with hydrogen bromide to form pobr3. In industry, it is prepared by the reaction of phosphorus trichloride with oxygen or phosphorus pentoxide. It is mainly used to produce phosphate esters, such as trimethylbenzene phosphate.

This product is the basic raw material for the manufacture of various inorganic bromides such as sodium bromide, potassium bromide, lithium bromide, calcium bromide, and some alkyl bromides such as methyl bromide, bromoethane, etc. In medicine, it is used to synthesize sedatives and anesthetics. It is also a good solvent for some metal minerals, used for the extraction of high purity metals. In the petroleum industry, it is used as a separating agent for alkoxy and phenoxy compounds and a catalyst for the oxidation of alicyclic and chain hydrocarbons to ketones, acids or peroxides. It is also used in the synthesis of dyes and spices.

Chromium chloride hexahydrate is used to manufacture chromium containing catalyst and olefin polymerization catalyst; The pigment industry is used to manufacture various pigments containing chromium; Printing and dyeing industry is used as fabric printing and dyeing mordant and tanning intermediate; Ceramic industry is used for ceramics and glaze color; Trivalent chromium is used in plating solution in electroplating industry.

Used in the manufacture of alkaloid & reagents, pigment, molybdenic red , catalyst, molybdenic salt, light fast color precipitator; the material of fire retardant & metal corrosion retardant of nuisance free cooling water system.

It is used in the manufacture of metal tungsten, tungstic acid and tungstate. Used as mordant, pigment and catalyst. It can also be used as fabric fire retardant and analytical chemical reagent.