Method for preparing nickelous carbonate by utilization of waste ammonia decomposition catalyst

A catalyst and ammonia decomposition technology, applied in the direction of nickel carbonate, etc., can solve the problems of nickel resource shortage, low nickel carbonate performance index, high impurity content, etc., and achieve low loss, high nickel leaching rate, and high product purity.

Active Publication Date: 2015-03-04
GEM CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The embodiment of the present invention provides a method for preparing nickel carbonate by using the spent ammonia decomposition catalyst, aiming to solve the problems of nickel resource shortage, low performance index and high impurity content of nickel carbonate produced by recycling technology

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  • Method for preparing nickelous carbonate by utilization of waste ammonia decomposition catalyst
  • Method for preparing nickelous carbonate by utilization of waste ammonia decomposition catalyst
  • Method for preparing nickelous carbonate by utilization of waste ammonia decomposition catalyst

Examples

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Embodiment 1

[0032] Take 100kg of waste ammonia decomposition catalyst, ball mill, and roast the material after ball milling at 500°C for 2 hours. After roasting, it is leached with concentrated sulfuric acid, wherein the mass ratio of catalyst to concentrated sulfuric acid is 1:4, a small amount of sodium chlorate is added during the reaction, and the air stirrer is turned on at the same time, the reaction temperature is controlled at 80-85°C, and the pH value is controlled at 0.5- 1.0, reacted for 3 hours. The amount of sodium chlorate added is 15% of the Ni metal molar content ratio in the spent catalyst, and the nickel leaching rate is 92%. Plate and frame filter press, add sodium carbonate solid to the filtrate to adjust the pH value to 4.0, plate and frame press filter, add sodium fluoride solid to the filtrate, the molar ratio of sodium fluoride to magnesium metal is 1.5, heat to 90°C, react for 1 hour, plate and frame Press filtration, use sulfonated kerosene and P204 with a volum...

Embodiment 2

[0034] Get 100kg of waste ammonia decomposition catalyst, ball mill, and roast the material after ball milling at 600°C for 3 hours. After roasting, it is leached with concentrated hydrochloric acid, wherein the mass ratio of catalyst to acid is about 1:4. During the reaction, a small amount of sodium chlorate is added and the air stirrer is turned on at the same time. The reaction temperature is controlled at 75-80°C, and the pH value is controlled at 0.5-1.0. React for 5 hours. The amount of sodium chlorate added is 20% of the Ni metal molar ratio in the spent catalyst, and the nickel leaching rate is 91%. Plate and frame filter press, add sodium carbonate solid to the filtrate to adjust the pH value to 4.0, plate and frame press filter, add sodium fluoride solid to the filtrate, the molar ratio of sodium fluoride to magnesium metal is 1.3, heat to 80°C, react for 1 hour, plate and frame Press filtration, use sulfonated kerosene and P204 with a volume ratio of 3.8:1 to extr...

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Abstract

The invention relates to the technical field of non-ferrous metal material processing and preparation and provides a method for preparing nickelous carbonate by the utilization of a waste ammonia decomposition catalyst. The method comprises the following steps of: carrying out ball milling on an ammonia decomposition catalyst, roasting, dissolving the roasted ammonia decomposition catalyst by the addition of an acid, adding an alkaline compound, adjusting pH value to 3.5-4.5, and filtering to obtain a first filtrate; adding fluoride into the first filtrate, heating to generate calcium and magnesium precipitates, and carrying out solid-liquid separation to obtain a second filtrate; carrying out extraction and impurity removal on the second filtrate by the use of P204 and P507, carrying out back extraction on an organic phase by the use of an acid, and separating to obtain a nickel liquid; adding carbonate into the nickel liquid, precipitating, filtering, and drying filter residue to obtain nickelous carbonate. According to the method, by the adoption of multiple steps of oxidation-assisted leaching, extraction separation and carbonate precipitating nickel, nickel dipping has high yield and low loss, and the product has high purity, small particle size and high activity.

Description

technical field [0001] The invention belongs to the technical field of processing and preparation of nonferrous metal materials, and in particular relates to a method for preparing nickel carbonate by using a spent ammonia decomposition catalyst. Background technique [0002] With the increasing severity of environmental pollution and the greenhouse effect, the sustainable development of energy and the environment has become a major international political issue of great concern to all countries. Hydrogen energy is a very clean energy, and its combustion product is water, which will not pollute the environment, and has incomparable advantages over traditional energy. Compared with other hydrogen production technologies, the ammonia decomposition hydrogen production technology has no carbon monoxide pollution, and the ammonia decomposition process does not need to introduce oxygen and water from the outside. The process is simple, the device is easy to miniaturize, the storag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G53/06
Inventor 苏陶贵王勤何显达谭翠丽
Owner GEM CO LTD
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