Method for preparing heavy basic copper carbonate

A copper carbonate and heavy alkali technology, applied in chemical instruments and methods, copper compounds, inorganic chemistry, etc., can solve the problems of inability to achieve water balance, difficulty in sales, and large labor for cleaning copper powder, and achieve the goal of being conducive to separation and purification. The effect of washing, solving air pollution problems and improving equipment utilization

Inactive Publication Date: 2012-07-04
樊余杰
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Problems solved by technology

The prior art provides a method to prepare heavy basic carbonic acid with copper, ammonia and ammonium bicarbonate as raw materials, through the preparation of concentrated ammonia water, leaching synthesis reaction, filtration, thermal decomposition, separation, drying, crushing, inspection and packaging, etc. In the copper method, a certain amount of copper powder will inevitably be generated during the copperization process. The traditional copperization pool leaves a space for copper powder under the flower plate, which is cleaned regularly, and the amount of air blowing is small to facilitate the copper powder. Shen; filter with natural filtration to prevent copper powder from penetrating, resulting in disproportionation reaction during thermal decomposition, and then oxidized to form black copper oxide, making the product black and unqualified
This process has the disadvantages of slow copperization speed, heavy labor for cleaning copper powder, slow natural filtration speed and serious ammonia pollution.
In the thermal decomposition process, direct heating with steam is used. As a result, the expansion of the mother liquor is caused by the condensation of the steam, and the mother liquor cannot be completely returned to the system. The water pollution is serious, the recovery rate of raw materials is low, and the water balance cannot be achieved. Other products must be produced separately, which makes the process complicated. At the same time, there are by-products, which bring certain difficulties to sales

Method used

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  • Method for preparing heavy basic copper carbonate
  • Method for preparing heavy basic copper carbonate
  • Method for preparing heavy basic copper carbonate

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Example 1: Referring to accompanying drawing, technological process of the present invention is as follows:

[0023] (1) Preparation of concentrated ammonia water: prepare ammonia water with a concentration of 11% by using deionized water and liquid ammonia (or recovering dilute carbonized ammonia water from the absorption tower and separating light washing liquid).

[0024] (2) Synthesis reaction of leaching: put the concentrated ammonia water in step (1) into the copper pool equipped with copper wire, press NH 4 HCO 3 / NH 3 Molar ratio = 2 Add ammonium bicarbonate, blow in air with an air compressor, and then use steam to control the reaction temperature to 60°C, so that the reaction solution meets the sulfuric acid test (that is, the reaction is good).

[0025] The sulfuric acid test is: take about 5ml of the clear liquid, and add sulfuric acid reagent without producing red precipitate.

[0026] Detection principle: Cu(NH 3 ) 2 CO 3 +H 2 SO 4 →CuSO 4 Blue ...

Embodiment 2

[0038] Example 2: The main process method is the same as example 1, wherein, the second step is by NH 4 HCO 3 / NH 3 Ammonium bicarbonate is added at a molar ratio of 3, the reaction temperature is 70°C, the thermal decomposition heating temperature of the fourth step is 100°C, and the fifth step is to separate, wash, dry, Crush and pack after passing the inspection.

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Abstract

The invention discloses a method for producing heavy basic copper carbonate by a new secondary oxidation copper removal and air stripping process. Copper, ammonia and ammonium bicarbonate are taken as raw materials, and the method comprises the following steps of: performing leaching synthesis reaction, filtering, performing thermal decomposition, separating, washing, drying, crushing, packaging after inspection, and the like. By the preparation method, the decomposition reaction speed is improved, byproducts and waste materials are avoided, the utilization rate of the raw materials is high, environmental pollution is avoided, a problem of water balance in the production process is solved, and the method accords with a sustainable development policy and belongs to a clean production process.

Description

technical field [0001] The invention relates to a preparation method of basic copper carbonate, in particular to a method for producing heavy basic copper carbonate by secondary oxidation copper removal and air stripping. Background technique [0002] Heavy basic copper carbonate belongs to the field of fine chemicals, mainly used in organic catalysts, fungicides, electronic ceramics, dealkalization agents for crude oil storage, etc. The prior art provides a method to prepare heavy basic carbonic acid with copper, ammonia and ammonium bicarbonate as raw materials, through the preparation of concentrated ammonia water, leaching synthesis reaction, filtration, thermal decomposition, separation, drying, crushing, inspection and packaging, etc. In the copper method, a certain amount of copper powder will inevitably be generated during the copperization process. The traditional copperization pool leaves a space for copper powder under the flower plate, which is cleaned regularly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G3/00
Inventor 樊余杰
Owner 樊余杰
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