Recovery of palladium chloride in Xing'an League

Source: Putian Licheng Huteng Recycling Station Time: 2024-06-28 03:02:07 [Report]

1. Used as analytical reagent
2. It is mainly used as a catalyst for the production of acetaldehyde from ethylene and other palladium based catalysts. Manufacture molecular sieve and prepare surfactant for coating of non-conductive materials. It is used to manufacture gas sensing elements, etc.
Palladium powder is added into the reactor containing hydrochloric acid, and air is introduced under stirring for oxidation reaction to generate palladium chloride solution, which is purified, filtered, evaporated and concentrated, cooled and crystallized, centrifuged and dried to obtain finished palladium chloride product. Its Pd+2HCl+0.5O2 → PdCl2+H2O [2]

Palladium is a member of Group VIII platinum series elements in the fifth cycle. Palladium is a silvery white transition metal, which is soft, has good ductility and plasticity, and can be forged, calendered and drawn. The massive metal palladium can absorb a large amount of hydrogen, which makes the volume significantly expand, become brittle and even break into fragments. It is a chemical element discovered by British chemist William Wuraston from platinum mine in 1803. It is an indispensable key material in high-tech fields such as aerospace, aviation and automobile manufacturing. Palladium chloride, also known as palladium dichloride, palladium chloride, anhydrous chloride, is used to prepare special catalysts and molecular sieves; 600 ° C sublimation decomposition; Its dihydrate is dark red hygroscopic crystal. It can be used to prepare coating of non-conductive materials; Make gas sensors, analytical reagents, etc.

It is mainly used for making catalysts, dental materials, watches and surgical instruments. As a member of the palladium platinum group, the element symbol Pd is similar to platinum in appearance, with silver white metallic luster and bright luster. The specific gravity is 12, lighter than platinum, and the ductility is strong. The melting point is 1555 ℃, the hardness is 4-4.5, slightly harder than platinum. It is chemically stable, insoluble in organic acid, cold sulfuric acid or hydrochloric acid, but soluble in nitric acid and aqua regia. It is not easy to oxidize and lose luster under normal conditions. Palladium is one of the platinum series metals. Platinum series metals include ruthenium, rhodium, palladium, platinum, etc. Most of them are more expensive than gold, which is a typical "home" of metals

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