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Method for removing sulfate radical impurities from nickel carbonate

A technology of nickel carbonate and sulfate, applied in the direction of nickel carbonate, etc., can solve the problems of high cost of wastewater treatment, long washing process, low efficiency, etc., and achieve the effect of avoiding the long washing process

Inactive Publication Date: 2019-08-06
JINGMEN GEM NEW MATERIAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of this, the main purpose of the present invention is to provide a method for removing sulfate radical impurities in nickel carbonate, which solves the problems of long washing process, large water consumption, low efficiency and high post-treatment wastewater cost in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A method for removing sulfate radical impurities in nickel carbonate, the method is realized through the following steps:

[0033] Step 1, temperature is 55 ℃, mass fraction is 20% liquid caustic soda is added in the nickel carbonate that contains sulfate ion according to flow rate and regulates pH value to 9.5, obtains the nickel carbonate slurry after alkali washing;

[0034] Step 2, the nickel carbonate slurry after the alkaline washing that step 1 obtains is added aging 10h in the aging still, obtains the nickel carbonate slurry after aging;

[0035] Step 3, use pure water with a temperature of 88°C and a conductivity of ≤100 μs / m to rinse and wash the aged nickel carbonate slurry obtained in step 2, and then dry it at 100°C for 2.5 hours to obtain sulfuric acid removal Nickel carbonate as root impurity.

[0036] Wherein, the concrete preparation method of the nickel carbonate that contains sulfate ion in step 1 is:

[0037] Step 1.1, prepare respectively the sodi...

Embodiment 2

[0041] A method for removing sulfate radical impurities in nickel carbonate, the method is realized through the following steps:

[0042] Step 1, temperature is 40 DEG C, the liquid caustic soda that mass fraction is 32% is added in the nickel carbonate that contains sulfate ion according to flow rate and regulates pH value to 9.5, obtains the nickel carbonate slurry after alkali washing;

[0043] Step 2, the nickel carbonate slurry after the alkaline washing that step 1 obtains is added aging 10h in the aging still, obtains the nickel carbonate slurry after aging;

[0044]Step 3, use pure water with a temperature of 85°C and a conductivity of ≤100 μs / m to rinse and wash the aged nickel carbonate slurry obtained in step 2, and then dry it at 95°C for 3 hours to obtain sulfate radical removal impurity of nickel carbonate.

[0045] Wherein, the concrete preparation method of the nickel carbonate that contains sulfate ion in step 1 is:

[0046] Step 1.1, prepare respectively th...

Embodiment 3

[0050] A method for removing sulfate radical impurities in nickel carbonate, the method is realized through the following steps:

[0051] Step 1, temperature is 70 DEG C, the liquid caustic soda that massfraction is 10% is added in the nickel carbonate that contains sulfate ion according to flow rate and adjusts pH value to 9.5, obtains the nickel carbonate slurry after alkali washing;

[0052] Step 2, the nickel carbonate slurry after the alkaline washing that step 1 obtains is added aging 10h in the aging still, obtains the nickel carbonate slurry after aging;

[0053] Step 3, use pure water with a temperature of 70°C and a conductivity of ≤100 μs / m to rinse and wash the aged nickel carbonate slurry obtained in step 2, and then dry it at 105°C for 2 hours to obtain sulfate radical removal impurity of nickel carbonate.

[0054] Wherein, the concrete preparation method of the nickel carbonate that contains sulfate ion in step 1 is:

[0055] Step 1.1, prepare respectively the...

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Abstract

The invention discloses a method for removing sulfate radical impurities from nickel carbonate. The method comprises: 1, adding a liquid alkali to nickel carbonate containing sulfate ions, and adjusting the pH value to 8.8-10.5 to obtain an alkali-washed nickel carbonate slurry; 2, adding the alkali-washed nickel carbonate slurry to an aging kettle, and aging for 1-20 h to obtain an aged nickel carbonate slurry; and 3, leaching and washing the aged nickel carbonate slurry with pure water, and drying to obtain sulfate radical impurity removed nickel carbonate. According to the present invention, the nickel carbonate containing sulfate ions is washed with the liquid alkali with the temperature of 40-70 DEG C and the mass fraction of 10-32%, the washed nickel carbonate containing sulfate ionsis aged for 1-20 h, and the aged material is leached and washed with pure water, such that the problems of long washing process, large water consumption, low efficiency and high wastewater treatmentcost at the late stage are effectively avoided, and the S content in the obtained nickel carbonate is extremely low.

Description

technical field [0001] The invention relates to a method for removing impurities in nickel carbonate, and relates to a method for removing sulfate impurities in nickel carbonate. Background technique [0002] Basic nickel carbonate is an important inorganic fine chemical, mainly used to prepare various nickel salts. High-purity refined basic nickel carbonate can be used in smelting, ceramic pigments, glaze ingredients, batteries, contact agents, nickel plating and catalysts and other intermediates, which are widely used and in great demand, and belong to classic catalyst intermediates, with long-term demand and market unsaturation; among them, the traditional washing method adopts a large amount of water washing or ammonia washing, etc., although it has a certain effect on washing , but the washing process is too long, the efficiency is low and a large amount of washing water is consumed, resulting in higher costs for post-processing wastewater, which does not meet green pro...

Claims

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Application Information

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IPC IPC(8): C01G53/06
CPCC01G53/06C01P2006/80
Inventor 许开华苏陶贵陈龙吴伟王超
Owner JINGMEN GEM NEW MATERIAL
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