A method for preparing cuprous oxide from scrap copper-tungsten alloy

Abstract

The invention discloses a method for preparing cuprous oxide by using waste copper-tungsten alloy as raw material, which comprises the following steps: (1) fully reacting the waste copper-tungsten alloy ground into powder with nitric acid solution to obtain copper nitrate solution; (2) Copper nitrate solution is mixed with excess iodine salt or bromine salt solution, and then adding a reducing agent solution with a concentration of 1-4mol / L to carry out the reduction reaction for 1-2h, the reaction process is continuously stirred, and the reaction is completed to obtain a complex ion [CuI 2 ] ‑ or [CuBr 2 ] ‑ The mixed solution; Add anilino compound C in the mixed solution 6 NH 2 R1R2R3R4R5 stirred and reacted for 60-80min to generate flocs, filtered the flocs and cleaned them with water, and set aside; (3) reacted the flocs with alkaline reagents to obtain high-purity Cu 2 O. The preparation process of the present invention is simple and time-saving, and the material is economical, and the prepared cuprous oxide can ensure a yield of more than 98%, a purity of about 99%, and a maximum of 99.6%.

Description

Technical field [0001] The present invention relates to the technical field of preparation and application of inorganic functional materials, and is specifically a method of preparing an oxide in copper tungsten alloy as a raw material. Background technique [0002] Oxidation of copper is a p-type oxide semiconductor material, which has good catalytic activity, and also has a very strong adsorption property, low temperature paramagnetic properties. There is a wide range of applications in many areas such as organic synthesis, new energy, water, sterilization, and superconducting. At present, the raw material used in copper oxide is basically copper with copper or nitrate, and then the use of sodium borohydride, vitamin C, formic acid, glucose, etc., is prepared to prepare an oxide, which increases production costs to some extent. For the problem of production cost, there is a method of recovering the recovery of ablated copper tungsten alloys in the prior art. For example, CN2016...

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Problems solved by technology

Aiming at the problem of production cost, in the prior art, there is a method of recycling and preparing cuprous oxide by using waste copper-tungsten alloy as raw material. For example, CN201610859960.2 uses nitric acid to leaching the copper in waste copper-tungsten alloy twice, and then uses sodium sulfite to reduce copper nitrate Preparation of cuprous oxide powder, this method can effectively reduce the cost of use, but since cuprous oxide is made by one-time reduction with a reducing agent, the reducibility of the reducing agent and its concentration will have an impact on the purity and yield of the product. influences

For example, the increase of reducing agent concentration can improve the yield, but the excessive reduction of copper ions will lead to the generation of impurity phase Cu, the purity of cuprous oxide will decrease, and reducing the concentration of reducing agent will greatly reduce the yield, so using waste A method of preparing cuprous oxide with high purity and high yield from copper-tungsten alloy is urgently needed at present

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