Water heating reduction method preparing process for cuprous chloride

Abstract

The preparation process of cuprous chloride crystal by hydrothermal reduction method is to make a mixed aqueous solution of copper sulfate and sodium chloride, and transfer it into a pressure-resistant and corrosion-resistant reaction kettle, then add the reducing agent formaldehyde, and heat it to 130°C to 170°C , hydrothermal reduction reaction for 3 to 12 hours to generate cuprous chloride crystals, filtered after cooling, washing and drying the filtered cuprous chloride crystals according to conventional methods to obtain the target product. In the preparation process of the cuprous chloride crystal, the present invention uses formaldehyde as a reducing agent, and the feed liquid and the formaldehyde reducing agent are directly subjected to a hydrothermal reduction reaction in a closed reaction kettle to generate the target product of the cuprous chloride crystal in one step, and the preparation process is simple , easy to control, water-saving and energy-saving, no harmful gas and liquid discharge, the mother liquor after the cuprous chloride crystal is filtered out can be recycled after treatment, and has the double advantages of environmental protection and energy saving.

Description

technical field [0001] The invention relates to a preparation process of cuprous chloride, in particular to a preparation process of cuprous chloride crystals by a hydrothermal reduction method, and belongs to the technical field of inorganic synthesis in the chemical industry. Background technique [0002] Cuprous chloride product is an important chemical raw material, which can be used to prepare phthalocyanine pigments, additives in insecticides and preservatives, desulfurization and decolorization agents in petrochemical industries, denitrification agents for nitrocellulose, soaps and fats Coagulants in organic synthesis, catalysts in organic synthesis, reducing agents in the dye industry and used in batteries, electroplating and pharmaceutical industries. [0003] At present, the industrial production of cuprous chloride mainly has the following methods: [0004] ① Scrap copper air oxidation method: use copper wire (copper sheet, copper powder) with hydrochloric acid a...

AI Technical Summary

Problems solved by technology

The waste copper chlorine method is mainly due to large investment in equipment, complex process, and difficult control; other methods are based on Na[CuCl 2 ] A large amount of water is used during hydrolysis, and the energy consumption of waste water recovery is high, but general manufacturers do not recycle, which not only wastes raw materials but also pollutes the environment; although the process of using sodium sulfite or sulfur dioxide reduction method is relatively simple, the cost is high, and a large amount of acid is produced Fog pollutes the environment, and the particle size of the prepared cuprous chloride is small and difficult to filter, and the product is also easy to oxidize

[0009] The above several preparation methods all have the following two common problems: 1. cause pollution to the environment; 2. the sodium chloride raw material is basically disposable, the waste of raw materials is great, and the energy consumption in the production process is generally higher

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