Preparation of cupric nitrate solution

A technology of copper nitrate and solution, applied in the direction of copper nitrate, etc., can solve the problems of large nitrogen oxide pollutants, difficult pollution control, large consumption of nitric acid, etc., and achieve reduction of consumption of nitric acid, obvious economic and environmental benefits, The effect of saving the cost of pollution control

Inactive Publication Date: 2009-07-15
SICHUAN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

This method not only consumes a lot of nitric acid, but also produces a large amount of nitrogen oxide pollutants. The subsequent pollution control is difficult and expensive.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Example 1: Add 5kg of metal copper shavings into a stainless steel autoclave with a volume of 10L, add 9.5L of 12mol / L nitric acid, feed 0.2MPa industrial pure oxygen, and react at 40-50°C for 6 hours without stirring. After the end, liquid-solid separation was carried out to obtain 9.3L copper nitrate solution, the Ph value of the solution was 3.8, the reaction tail gas was 1.5L (volume when converted into an absolute pressure of 0.1MPa), and the nitrogen oxide concentration was 6.8mg / m 3 .

Embodiment 2

[0015] Embodiment 2: adding 500kg metal copper shavings to a volume of 1m 3 In a stainless steel autoclave, add 950L of 13mol / L nitric acid, introduce 0.1MPa industrial pure oxygen, stir and react at 40-60°C for 4 hours, perform liquid-solid separation after the reaction, and obtain 930L copper nitrate solution. The Ph value is 3.7, the reaction exhaust gas is 100L (converted to the volume when the absolute pressure is 0.1MPa), and the nitrogen oxide concentration is 6.1mg / m 3 .

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PUM

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Abstract

The invention provides a method for preparing a cupric nitrate solution, which comprises the following steps: putting metal copper inside a pressure-proof and nitric acid corrosion-resistant container, and introducing industrial pure oxygen to perform the dissolving reaction of metal copper at a reaction temperature of between 20 100 DEG C and 100 DEG C with a reaction pressure between 0.05 MPa and 0.5 MPa. The nitric acid for reaction is between 1 mol/L and 14 mol/L. The amount of copper for reaction is larger than the amount calculated by the chemical equation and the reaction lasts for 1 to 10 hours.

Description

technical field [0001] The invention relates to a preparation method of copper nitrate solution. Background technique [0002] Copper nitrate solution is a feed solution for preparing copper nitrate reagent and copper oxide. Copper nitrate is widely used as a raw material for relatively pure copper oxide and other copper salts, and is also used for copper plating, fabric dyeing, medicine, fungicides, wood preservatives, herbicides, pigments, pyrotechnics, catalysts, phosphor activators and photosensitive Resistive materials and other fields. Copper oxide is widely used in glass, ceramics, enamel, dyes, rayon, oil desulfurization, paint anti-wrinkle, artificial gemstones and catalysts and other fields. At present, the copper nitrate solution is mainly prepared by dissolving metallic copper and other copper-containing materials with nitric acid. This method not only consumes a lot of nitric acid, but also produces a large amount of nitrogen oxide pollutants. The subsequent ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G3/08
Inventor 龙炳清龙怡魏涛邓国海万旭曾伟
Owner SICHUAN NORMAL UNIVERSITY
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