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Method for preparing high-purity nickel sulfate by using inactivated nickel catalyst

A technology of nickel catalyst and nickel sulfate, which is applied in the direction of nickel sulfate, iron sulfate, aluminum oxide/aluminum hydroxide, etc., can solve the problems of complex operation and unsatisfactory separation effect, and achieve high purity, short reaction time and nickel recovery rate high effect

Active Publication Date: 2014-07-16
LIAONING PETROCCHEM VOCATIONAL & TECH COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The method is complicated to operate and the separation effect is not ideal

Method used

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  • Method for preparing high-purity nickel sulfate by using inactivated nickel catalyst
  • Method for preparing high-purity nickel sulfate by using inactivated nickel catalyst
  • Method for preparing high-purity nickel sulfate by using inactivated nickel catalyst

Examples

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Embodiment 1

[0020] Embodiment 1, a kind of method utilizing deactivated nickel catalyst to prepare high-purity nickel sulfate

[0021] Such as figure 1 shown, including:

[0022] Step 1, dissolving the deactivated nickel catalyst into the sulfuric acid solution to obtain solution A, heating the solution to boiling, and keeping it for 30 minutes, wherein the molar ratio of the deactivated nickel catalyst to the substance in the sulfuric acid solution is 1:1~1.5; The specific operation is:

[0023] Take deactivated nickel catalyst 500.0g (95.6% with nickel oxide content), add 40% sulfuric acid 1600.0g according to the stoichiometric ratio of nickel oxide and sulfuric acid reaction 1:1 (sulfuric acid is excessive 1%), will take by weighing The deactivated nickel catalyst is added in the sulfuric acid solution to prepare solution A. The heater heats the solution A to boiling and maintains a slight boil for 30min. The heater is turned off to stop heating, and the undissolved solid deactivate...

Embodiment 2

[0039] Embodiment 2, nickel sulfate purity detection

[0040] 1. Determination of iron sulfate content

[0041]1.1. Draw a standard curve

[0042] Prepare the standard storage solution of ferric oxide: weigh 0.5000g of ferric oxide (commercially available, 99.99%) and burn it at 600°C for 2 hours in advance, put it in a 250mL beaker, add a little distilled water to moisten it, and add (1 +1) 40mL of hydrochloric acid (commercially available hydrochloric acid mixed with water in equal volumes), cover with a watch glass, heat until completely dissolved, cool, transfer to a 1000mL volumetric flask, wash the beaker with distilled water, dilute to the mark with distilled water, mix well, 1mL ferric oxide standard stock solution contains 0.5mg ferric oxide.

[0043] Ferric oxide standard solution: use a 50mL pipette to accurately pipette 50.00mL of ferric oxide standard storage solution into a 250mL volumetric flask, dilute to the mark with distilled water, mix well, 1mL of ferric...

Embodiment 3

[0082] Such as figure 1 Shown, a kind of method that utilizes deactivated nickel catalyst to prepare high-purity nickel sulfate

[0083] Step 1, dissolving the deactivated nickel catalyst into the sulfuric acid solution to obtain solution A, heating the solution to boiling, and keeping it for 30 minutes, wherein the molar ratio of the deactivated nickel catalyst to the substance in the sulfuric acid solution is 1:1~1.5; The specific operation is:

[0084] Take deactivated nickel catalyst 400.0g (95.6% with nickel oxide content), add 40% sulfuric acid 1500.0g according to the stoichiometric ratio of nickel oxide and sulfuric acid reaction 1:1 (sulfuric acid is excessive 1%), will take by weighing The deactivated nickel catalyst is added in the sulfuric acid solution to prepare solution A. The heater heats the solution A to boiling and maintains a slight boil for 30min. The heater is turned off to stop heating, and the undissolved solid deactivated solid is filtered out. The in...

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Abstract

The invention discloses a method for preparing high-purity nickel sulfate by using an inactivated nickel catalyst. The method includes the following steps: dissolving the inactivated nickel catalyst in a sulfuric acid solution, filtering the undissolved solids to obtain a solution A; regulating the pH value of the solution A to 1.6-1.8 by using ammonia water, and filtering the precipitate to obtain a solution B; regulating the pH value of the solution B to 3-4 by using aluminum hydroxide to obtain a solution C, heating the solution C to 60-70 DEG C, and maintaining for 15-30 minutes, and filtering the precipitate to obtain a pure nickel sulfate solution; carrying out crystallization treatment on the pure nickel sulfate solution, carrying out solid-liquid separation, thus the solid is a nickel sulfate crystal. The method disclosed by the invention is simple in process, convenient to operate, short in reaction time, energy-saving, low in cost and wide in application space in actual production.

Description

technical field [0001] The invention relates to a method for preparing high-purity nickel sulfate by utilizing a deactivated nickel catalyst. Background technique [0002] At present, in the production of catalytic hydrogenation chemical industry, nickel powder is commonly used as a catalyst (the nickel powder used as a catalyst will contain a small amount of iron and aluminum). The nickel catalyst will lose its activity after a certain period of time, and it needs to be replaced with a new nickel catalyst. . Deactivated nickel catalysts are often used to react with sulfuric acid to form nickel sulfate. But, because iron and aluminum are contained in the nickel catalyst, impurity iron sulfate and aluminum sulfate can be contained in the nickel sulfate prepared by the deactivated nickel catalyst, which affects the quality and purity of nickel sulfate. The traditional way to remove aluminum sulfate and iron sulfate is to separate iron sulfate and aluminum sulfate by recrysta...

Claims

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Application Information

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IPC IPC(8): C01G53/10C01G49/14C01F7/02
Inventor 邸万山
Owner LIAONING PETROCCHEM VOCATIONAL & TECH COLLEGE
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