What type of storage tanks are used for phosphorus trichloride?

Molecular formula: PCl3. Properties: Colorless, clear, fuming liquid. Density is 1.574 g/cm3. Freezing point: -112°C. Boiling point 75.5°C. Soluble in benzene, ether, chloroform, carbon disulfide, and carbon tetrachloride. It decomposes in water, releasing hydrogen chloride gas. When exposed to humid air, it hydrolyzes to phosphorous acid and hydrogen chloride, producing white smoke. Reacts with oxygen to form phosphorus trichloride oxide. Reacts with chlorine to form phosphorus pentachloride. It will catch fire upon contact with organic materials. Flammable. Irritates the mucous membranes. It is corrosive. Toxic! Yellow phosphorus is melted into a liquid and fed into a reactor, where dry chlorine gas is introduced to carry out a chlorination reaction, producing phosphorus trichloride vapor; this vapor is then distilled and condensed in a distillation tower to yield the final product. It is mainly used in the production of organophosphorus pesticides such as trichlorfon, methamidophos, and thiophanate-methyl, as well as substances like phosphorus trichloride, phosphorus trichloride sulfide, phosphorous acid, and triphenyl phosphate. It is also used as an intermediate in the production of drugs such as sulfadiazine and sulfamethoxazole, as well as a chlorinating agent and catalyst in the manufacture of fragrances. Refer to page P353 of the 1995 edition of the \"Corrosion Data and Material Selection Handbook\": carbon steel can be used, but care must be taken to keep it dry during storage. This post was last edited by hzggp on 2009-4-5 09:21]

Carbon steel will do, but stainless steel is preferred

Q345R will do. It’s best not to use stainless steel. Be aware that medium toxicity is extremely hazardous

Carbon steel must absolutely not be used; the medium in question is highly corrosive. When it comes into contact with water or is exposed to low air pressure, any leakage will result in a situation similar to that of a smoke bomb – it is flammable and toxic. It is best to use enamel-lined reactors as containers or reaction vessels, and those with high-quality enamel coating. If a condenser is available, it is best to choose a glass-lined condenser or a glass condenser.

Currently, the tanks of phosphorus trichloride transport vehicles sold on the market are all made of 304 material; carbon steel is not used! ! The design pressure of the tank is 0.2 MPa, and its volume is 10 m3.

The pipes, valves, and storage tanks we use are all made of carbon steel; chloride ions cause severe corrosion of stainless steel. Our carbon steel storage tanks have been in use for over four years now.

Carbon steel will do; there is no need to use stainless steel.

By the way, do you use voltage transformers or something like that? What material are they made of?:P

It seems 16MnR was used; it’s been in use for 7 years and is still in good condition

I’ve seen the design drawings; it’s Q345R. Stainless steel is less resistant to chloride ions than carbon steel