Preparation method for spectrograde copper nitrate

A copper nitrate, spectrally pure technology, applied in the field of preparation of spectrally pure copper nitrate, can solve the problems of high, can only be used as dyes and printing and dyeing industries, enamel coloring, low purity, etc., to achieve low impurity content, high purity, high benefit Effect

Inactive Publication Date: 2011-04-20
TIANJIN CHEM REAGENT RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Spectrally pure copper nitrate is used in the production and electroplating of picture tubes. The current method is to add distilled water and nitric acid with a relative density of 1.40 to the porcelain, and add copper wires in stages in the poison gas cabinet. After the reaction is completed, heat to dissolve and keep until Add distilled water, mix and filter until nitrogen oxides are no longer released, evaporate the filtrate a

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A preparation method of spectrally pure copper nitrate, the steps of which are:

[0016] 1. Electrolytic copper reacts with nitric acid:

[0017] Put 2kg of 99.9% electrolytic copper cut into flakes into a glass beaker, wash and soak with dilute nitric acid, which is prepared by adding 200mL of nitric acid with a relative density of 1.40 to 200mL of distilled water, and wash and soak the nitric acid Pour out the dirt, wash it twice with distilled water, then pour it out to remove surface impurities, then put it in a fume hood, add 1600mL of distilled water, and then slowly add 1200mL of high-purity nitric acid, the relative density of high-purity nitric acid is 1.40 , after the reaction slows down, heat, the heating temperature is 55 ° C, until no longer dissolved, after the reaction, filter to obtain solution A;

[0018] 2. Remove impurities:

[0019] Adjust the pH value of solution A to 3 with nitric acid, inject hydrogen sulfide gas for 15 minutes, let it stand for...

Embodiment 2

[0023] A preparation method of spectrally pure copper nitrate, the steps of which are:

[0024] 1. Electrolytic copper reacts with nitric acid:

[0025] Put 1.5kg of 99.9% electrolytic copper cut into flakes into a glass beaker, wash and soak with dilute nitric acid, which is prepared by adding 200mL of nitric acid with a relative density of 1.40 to 200mL of distilled water. Pour out the nitric acid and dirt, wash it with distilled water for 3 times, then pour it out to remove surface impurities, then put it in a fume hood, add 1280mL of distilled water, and then slowly add 1150mL of high-purity nitric acid, the relative density of high-purity nitric acid is 1.40. After the reaction slows down, heat at 100°C until it no longer dissolves. After the reaction is over, filter to obtain solution A;

[0026] 2. Remove impurities:

[0027] Adjust the pH value of solution A to 3.5 with nitric acid, inject hydrogen sulfide gas for 18 minutes, let it stand for 4.5 hours, and filter to...

Embodiment 3

[0031] A preparation method of spectrally pure copper nitrate, the steps of which are:

[0032] 1. Electrolytic copper reacts with nitric acid:

[0033] Put 1.8kg of 99.9% electrolytic copper cut into flakes into a glass beaker, wash and soak with dilute nitric acid, which is prepared by adding 200mL of nitric acid with a relative density of 1.40 to 200mL of distilled water. Pour out the nitric acid and dirt, wash it 4 times with distilled water, then pour it out to remove surface impurities, then put it in a fume hood, add 1500mL of distilled water, then slowly add 1300mL of high-purity nitric acid, the relative density of high-purity nitric acid is 1.40, after the reaction slows down, heat at 80°C until it no longer dissolves. After the reaction is over, filter to obtain solution A;

[0034] 2. Remove impurities:

[0035] Adjust the pH value of solution A to 3.2 with nitric acid, inject hydrogen sulfide gas for 20 minutes, let it stand for 4 hours, and filter to obtain sol...

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PUM

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Abstract

The present invention relates to the field of preparation methods for inorganic compounds, in particular to a preparation method for spectrograde copper nitrate. The invention is characterized by reacting nitric acid with electrolytic copper; introducing hydrogen sulfide gas to produce sulfide precipitates so as to remove metal cations; recrystallizing the copper nitrate to obtain spectrograde copper nitrate. The spectrograde copper nitrate prepared by the present invention has high purity and low impurity content, and the preparation process has easy steps and high benefits.

Description

technical field [0001] The invention relates to the field of preparation methods of inorganic compounds, in particular to a preparation method of spectrally pure copper nitrate. Background technique [0002] Spectrally pure copper nitrate is used in the production and electroplating of picture tubes. The current method is to add distilled water and nitric acid with a relative density of 1.40 to the porcelain, and add copper wires in stages in the poison gas cabinet. After the reaction is completed, heat to dissolve and keep until Add distilled water, mix and filter until nitrogen oxides are no longer released, evaporate the filtrate at 60-70°C to a relative density of 1.79-1.80, cool, suction filter, crystallize, wash with a small amount of water, drain, and bottle immediately after draining Promptly get copper nitrate, the copper nitrate that this method makes has low purity, high impurity content, can only be used as dyestuff and printing and dyeing industry, enamel colori...

Claims

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Application Information

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IPC IPC(8): C01G3/08
Inventor 胡建华
Owner TIANJIN CHEM REAGENT RES INST
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