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Zinc chloride Production and application by honghong liu

Article Author Biography
Zinc chloride Production and application by
Article Posted: 11/07/2013
Article Views: 128
Articles Written: 48
Word Count: 697
Article Votes: 0
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Zinc chloride Production and application

Science & Technology
Zinc chloride is a widely used reagent in various industrial processes. These include textile finishing, the etching of metals, the manufacture of parchment paper, and the preparation of galvanizing, soldering, and tinning fluxes. Zinc chloride is also used in organic chemical synthesis, such as in the formation of amines from azides.

Zinc chloride(CAS.NO:7646-85-7) has a variety of uses including water treatment as an electrolyte in battery manufacture, in zinc plating, rubber and fiber vulcanization, textile finishing and for applications in food canning. It has a number of uses in personal care products and as an intermediate for fertilizers, antibiotics and catalysts.

1.Production and preparation

1). Prepare by the action of hydrogen chloride gas on hot zinc. Several hydrated form is known to exist, which can be prepared by various reactions such as zinc oxide with aqueous hydrochloric acid.

Production methods: a quantity of hydrochloric acid containing a certain amount of added oxidation reactor hydrochloric left the reaction of zinc chloride solution . When the solution is 3.5 to 4 , the precipitate on standing , gave first purification will be cleared , barium chloride , high potassium , potassium chlorate and other purification to remove the root tellurium , iron and other impurities. And then allowed to settle by , the liquid sent to the second purification , the addition of zinc to the well lead , cadmium and other heavy metals, by filtration , the filter slope biogas into the graphite sheet concentrated with an evaporator , a dilute concentration of 45% zinc chloride solution from high to low and flow to the Department and the fire at the outlet concentration of more than 98% crystallized , crushed to obtain a zinc products. Its

ZnO +2 HCl ? ZnC12 + H2O

2).Non-aqueous zinc chloride can be obtained by heating zinc in a chlorine gas stream or hydrochloric acid. This is usually done commercially by means of a reaction between hydrochloric acid and zinc scrap or roasted zinc or, i.e. raw zinc oxide. The solution is purified in various ways, depending on which impurities are present in the initial material. Iron and manganese can be precipitated as oxides through the addition of zinc oxide or sodium hypochlorite. Heavy metals are removed with the aid of zinc powder. The solution is concentrated by boiling and hydrochloric acid is added to prevent the formation of basic chlorides.

Zinc chloride is usually sold as an approximately 50% solution but is also produced in solid form by further evaporation to an almost non-aqueous salt. The non-aqueous zinc chloride is very hygroscopic and is therefore used as a drying agent in organic syntheses.


1). for organic synthesis dehydrating agent , condensing agent , polyacrylonitrile solvent , mordant dyeing , mercerizing agent, sizing agents, used in the synthesis activity and cationic dyes

2). used as a dehydrating agent, catalyst , mordant , sizing agents, weighting agents, preservatives, also used in electroplating , dyes , pharmaceuticals, pesticides and other industrial

3). for organic synthesis industry, dehydrating agent , condensing agent producing vanillin, Lagotis aldehydes , anti-inflammatory pain medications , cation exchange resin catalyst . Polyacrylonitrile solvent can be used . Industry as a mordant dyeing , mercerizing agent, sizing agent . The textile industry for the production of sliver barrels , pike and other raw materials ( cotton fiber cosolvent ) , can improve fiber bonding force . Azoic dye industry as chromogenic dye salt stabilizer for the production of reactive dyes and cationic dyes . Oil purification agent and activated carbon as an activator . For the impregnation of wood having corrosion resistance and flame retardancy. Cardboard and cloth products used as flame retardants . Used in electroplating . Welding electrodes used drugs. Metallurgical industry for the production of aluminum , light metal deacidification, treating the metal surface oxide layer . Used for the production of blueprint paper . As battery electrolytes. For the production of resistant foam raw materials and production of zinc cyanide . Also used in medicine and drug production .

4). Used as analytical reagents, oil purifying agent and dehydrating agent in organic synthesis.

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