Our company has dilute hydrochloric acid at 31% concentration, as well as a mixed acid containing 12% hydrofluoric acid and 3% hydrochloric acid
Thread Content
As stated in the title, I am seeking information on the methods of utilizing both, as well as their value. Those who are interested can contact me at 13864440228
Uses of dilute hydrochloric acid Hydrochloric acid has a wide range of applications in various sectors of the national economy; the main uses are as follows: (1) Used in the hydrometallurgy of rare metals. For example, when processing tungsten, scheelite (calcium tungstate) is first mixed with sodium carbonate and then roasted in air at temperatures of 800°C to 900°C to produce sodium tungstate. CaWO4 + Na2CO3 = Na2WO4 + CaO + CO2↑ The sintered mass is immersed in water at 90°C to dissolve sodium tungstate; hydrochloric acid is then added to acidify the solution. The tungstic acid that precipitates is filtered out, and after further heating, tungsten oxide is obtained. Na2WO4 + 2HCl = H2WO4↓ + 2NaCl H2WO4 = WO3 + H2O↑ Finally, tungsten oxide is heated in a stream of hydrogen to obtain metallic tungsten. WO3 + 3H2 = W + 3H2O↑ (2) It is used in organic synthesis. For example, at temperatures of 180°C to 200°C, with mercury salts such as HgCl2 acting as catalysts, hydrogen chloride reacts with acetylene to produce vinyl chloride; this compound then polymerizes into polyvinyl chloride under the action of an initiator. (3) Used in the dyeing and printing industry For example, hydrochloric acid is used for the acid washing of bleached cotton fabric, as well as for neutralizing the residual alkali after the mercerization of cotton fabric. During the dyeing process, some dyes are insoluble in water; they need to be treated with hydrochloric acid to form soluble hydrochlorides before they can be used. (4) Used in metal processing For example, in the pre-plating treatment of steel parts, they are first washed with an alkali solution to remove oil stains, and then soaked in hydrochloric acid ； Before welding metal, a little hydrochloric acid or the like is applied to the joint; this takes advantage of the fact that hydrochloric acid can dissolve metal oxides in order to remove rust. Only in this way can a strong coating be applied to the metal surface, as well as a secure weld.
Did the poster make a mistake? It should be 31% dilute sulfuric acid. This has recycling value, but the material selection is tricky, and it is highly corrosive.
Hello, my company has a new type of anti-corrosion technology designed for use on the inner walls of pipes in reaction vessels. It can withstand various chemical substances at temperatures up to 240 degrees, as well as extreme vacuum conditions. Its thermal conductivity when used in reaction vessels is also better than that of PTFE-lined surfaces. 13961083233..