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Preparation method for active copper oxide

A technology of activated copper oxide and copper oxide, which is applied in the direction of copper oxide/copper hydroxide, etc., can solve problems such as poor working conditions and efficiency, unstable product quality, and serious dust pollution, and achieve complete decomposition, stable product quality, and process short process effect

Inactive Publication Date: 2014-08-20
JIANGSU TEHO METAL IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This preparation method belongs to open production, with cumbersome steps, poor working conditions and efficiency, harsh operating conditions, serious dust pollution, easy to cause over-burning or incomplete low-burning during roasting, unstable product quality, and low product recovery rate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment one: a kind of preparation method of active copper oxide, comprises the steps:

[0034] (1) Prepare ammonia water: prepare ammonia water with a concentration of 10% with deionized water and liquid ammonia, and store it in the liquid storage tank for later use;

[0035] (2) Leaching synthesis reaction: put electrolytic copper cut into strips with a shearing machine into the copper pool, pump the ammonia water prepared in step (1) until the electrolytic copper is submerged, and then press ammonium bicarbonate / ammonia water mole Ratio = 2 Add ammonium bicarbonate to the copper tank, and blow air from the bottom of the copper tank, control the temperature at 60-70°C until the reaction solution does not contain copper, and obtain copper ammonium solution, leaching the chemistry of the synthesis reaction The equation is:

[0036] 2Cu+2NH 4 HCO 3 +2NH 3 +O 2 =2Cu(NH 3 ) 2 CO 3 +2H 2 O;

[0037] Among them, the ammonia water is filtered through a bag filter...

Embodiment 2

[0049] Embodiment two: a kind of preparation method of activated copper oxide comprises the following steps:

[0050](1) Prepare ammonia water: prepare ammonia water with a concentration of 11% with deionized water and liquid ammonia, and store it in the liquid storage tank for later use;

[0051] (2) Leaching synthesis reaction: put electrolytic copper cut into strips with a shearing machine into the copper pool, pump the ammonia water prepared in step (1) until the electrolytic copper is submerged, and then press ammonium bicarbonate / ammonia water mole Ratio = 3 Add ammonium bicarbonate into the copper tank, and blow air from the bottom of the copper tank, control the temperature at 60-70°C until the reaction solution does not contain elemental copper, and obtain copper ammonium solution, leaching the chemistry of the synthesis reaction The equation is:

[0052] 2Cu+2NH 4 HCO 3 +2NH 3 +O 2 =2Cu(NH 3 ) 2 CO 3 +2H 2 O;

[0053] Among them, the ammonia water is filter...

Embodiment 3

[0065] Embodiment three: a kind of preparation method of activated copper oxide comprises the following steps:

[0066] (1) Prepare ammonia water: prepare ammonia water with a concentration of 12% with deionized water and liquid ammonia, and store it in the liquid storage tank for later use;

[0067] (2) Leaching synthesis reaction: put electrolytic copper cut into strips with a shearing machine into the copper pool, pump the ammonia water prepared in step (1) until the electrolytic copper is submerged, and then press ammonium bicarbonate / ammonia water mole Ratio = 3 Add ammonium bicarbonate into the copper tank, and blow air from the bottom of the copper tank, control the temperature at 60-70°C until the reaction solution does not contain elemental copper, and obtain copper ammonium solution, leaching the chemistry of the synthesis reaction The equation is:

[0068] 2Cu+2NH 4 HCO 3 +2NH 3 +O 2 =2Cu(NH 3 ) 2 CO 3 +2H 2 O;

[0069] Among them, the ammonia water is fil...

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Abstract

The invention discloses a preparation method for active copper oxide by using a spray flashing calciner. The method comprises the following steps: with copper, liquefied ammonia and ammonium bicarbonate as raw materials, preparing concentrated ammonia liquor with a concentration of 10 to 12% at first; then adding excess concentrated ammonia liquor into electrolytic copper, adding ammonium bicarbonate, introducing air at the same time and carrying out leaching and synthesis at a temperature of 60 to 70 DEG C so as to prepare cuprammonia; after filtering, pumping the cuprammonia into a reaction vessel for thermal decomposition so as to prepare a basic copper carbonate feed liquid; and filling the spray flashing calciner with the basic copper carbonate feed liquid, carrying out calcining at a temperature of 450 to 600 DEG C so as to prepare active copper oxide and recovering and reusing gas produced in the reaction by using an absorption tower. The method provided by the invention has the advantages of an increased reaction speed, substantially improved production efficiency, higher product purity, lower production cost and a wider product application scope; moreover, since the spray flashing calciner is used, heat dissipation is small, the resource of coal is saved, and requirements for energy conservation and environmental protection are better met.

Description

[0001] technical field [0002] The invention relates to a method for preparing copper oxide, in particular to a method for preparing active copper oxide. [0003] Background technique [0004] Activated copper oxide is electroplating-grade activated copper oxide, which is widely used in the electronics industry and aviation and aerospace industries because of its good activity and high purity. In addition to strict chemical composition requirements, it also has an acid-dissolving speed requirement that reflects the activity characteristics . [0005] The existing preparation of active copper oxide is to use copper, ammonia and ammonium bicarbonate as raw materials, through the preparation of concentrated ammonia water, leaching synthesis reaction, filtration, thermal decomposition, centrifugation, drying, sieving, roasting, sieving, packaging, etc. The process steps produce electroplating grade active copper oxide. This preparation method belongs to open production, with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G3/02
Inventor 陆寅陆明森张小琴
Owner JIANGSU TEHO METAL IND
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