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Method for continuously compounding high-purity alkali nickel carbonate

A technology of nickel carbonate and soda ash, applied in the direction of nickel carbonate, etc., can solve the problems such as difficult removal of impurities, high content of impurities, unsatisfactory, etc., and achieve the effect of fewer defects, high purity of finished products, and complete structure

Active Publication Date: 2013-02-13
CHANGSHA RES INST OF MINING & METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the current industrial production process, due to the influence of various factors such as raw material factors and process parameter control methods, basic nickel carbonate products not only have high impurity content, but also are difficult to remove impurities during the washing process, which cannot meet the high requirements of some industries. Soda nickel carbonate raw material demand

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  • Method for continuously compounding high-purity alkali nickel carbonate

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Comparison scheme
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Embodiment 1

[0026] a kind of like figure 1 Shown the method for the continuous synthesis of high-purity basic nickel carbonate of the present invention, may further comprise the steps:

[0027] (1) Select nickel electrolyte to prepare nickel-containing stock solution, and Ni in the nickel-containing stock solution 2+The concentration is controlled at 50g / L, and the Cl in the nickel stock solution - and SO 4 2- The molar ratio is controlled to be 1:1.18 (see Table 1); select industrial grade Na 2 CO 3 (the purity of which is not less than 98.8%) is formulated into Na with a concentration of 120g / L 2 CO 3 Solution; the prepared nickel-containing stock solution, ammonium salt (at least one of ammonium chloride, ammonium sulfate, ammonium nitrate) and precipitant Na 2 CO 3 Continuously transported to the multifunctional reactor for continuous synthesis reaction, the addition flow rate of the nickel-containing stock solution during continuous transport was 500.0 mL / h, Na 2 CO 3 The a...

Embodiment 2

[0036] a kind of like figure 1 Shown the method for the continuous synthesis of high-purity basic nickel carbonate of the present invention, may further comprise the steps:

[0037] (1) Select nickel electrolyte to prepare nickel-containing stock solution, and Ni in nickel-containing stock solution 2+ The concentration is controlled at 70g / L, and the Cl in the nickel stock solution - and SO 4 2- The molar ratio of the control is 1:1.22 (see table 3 below); another choice of industrial grade Na 2 CO 3 (the purity of which is not less than 98.8%) is formulated into Na with a concentration of 130g / L 2 CO 3 Solution; the prepared nickel-containing stock solution, ammonium salt (at least one of ammonium chloride, ammonium sulfate, ammonium nitrate) and precipitant Na 2 CO 3 Continuously transported to the multifunctional reactor for continuous synthesis reaction, the addition flow rate of the nickel-containing stock solution during continuous transport was 500.0 mL / h, Na 2...

Embodiment 3

[0046] a kind of like figure 1 Shown the method for the continuous synthesis of high-purity basic nickel carbonate of the present invention, may further comprise the steps:

[0047] (1) Select nickel electrolyte to prepare nickel-containing stock solution, and Ni in nickel-containing stock solution 2+ The concentration is controlled at 70g / L, and the Cl in the nickel stock solution - and SO 4 2- The molar ratio is controlled at 1:1.40 (see Table 5 below); another industrial grade Na 2 CO 3 (the purity of which is not less than 98.8%) is formulated into Na with a concentration of 100g / L 2 CO 3 Solution; the prepared nickel-containing stock solution, ammonium salt (at least one of ammonium chloride, ammonium sulfate, ammonium nitrate) and precipitant Na 2 CO 3 Continuously transported to the multifunctional reactor for continuous synthesis reaction, the addition flow rate of the nickel-containing stock solution during continuous transport was 700.0 mL / h, Na 2 CO 3 The ...

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Abstract

The invention discloses a method for continuously compounding high-purity alkali nickel carbonate. The method comprises the steps as follows: a nickeliferous stock solution, ammonium salt and a precipitant Na2CO3 are continuously conveyed to a multifunctional reactor for carrying out continuous compounding reaction, and resultant slurry is continuously discharged from a material outlet; during the continuous compounding reaction, the reaction temperature is controlled within 50-80 DEG C with a real-time monitoring system, the reaction pH value is controlled within 7.5-8.5, and the average residence time of a reaction system in the multifunctional reactor is controlled within 20 h-30 h; and a reaction discharging is filtered, filter residue is aged, and then the reaction discharging enters into a multi-level washing tower to be washed, when the flow conductance value of the multi-level washing tower bottom is less than 600 ms / cm, a washed product is filtered and dried to obtain the high-purity alkali nickelous carbonate. The invention has the advantages of simple process, low equipment investment, environment protection, complete product structure, good quality and the like.

Description

technical field [0001] The invention relates to an industrial preparation method of basic carbonate, in particular to a method for continuously synthesizing high-purity basic nickel carbonate. Background technique [0002] Basic nickel carbonate is an important inorganic fine chemical, which is mainly used to prepare various nickel salts. High-quality basic nickel carbonate can be used in the electronics industry. In addition, basic nickel carbonate is also widely used in electroplating, electroforming, enamel pigments and industrial catalyst industries. [0003] The preparation of powder by liquid phase reaction to generate precipitation has the advantages of simple process and wide adaptability, and is a widely used process. However, in the current industrial production process, due to the influence of various factors such as raw material factors and process parameter control methods, basic nickel carbonate products not only have high impurity content, but also are diffic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/06
Inventor 薛生晖付向辉陈刚危亚辉周新东张翔宇
Owner CHANGSHA RES INST OF MINING & METALLURGY
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