Method for preparing heavy basic copper carbonate

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...

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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

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