A method for preparing 4a zeolite with laterite nickel ore acid leaching slag as raw material

A technology of laterite nickel ore and acid leaching slag, which is applied in the field of environment and materials, can solve the problems of high raw material prices, and achieve the effect of low cost and simple process

Inactive Publication Date: 2016-07-06
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commercial 4A zeolite is mainly synthesized by using chemical raw materials through the traditional hydrothermal method. This process is easily restricted by the source of raw materials, and the price of raw materials is relatively high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] After grinding the acid leaching slag of laterite nickel ore and sodium hydroxide, according to the molar ratio of sodium to silicon n(Na 2 O) / n(SiO 2 ) at a ratio of 1.6:1 and mixed evenly, and reacted with alkali at 450°C for 4 hours, according to the molar ratio of water to sodium n(H 2 O) / n(Na 2 O) After adding water in an amount of 110:1, filter to obtain the filtrate. Into the filtrate according to the molar ratio of silicon to aluminum in the system n(SiO 2 ) / n(Al 2 o 3 ) at a ratio of 1.5:1 by adding sodium metaaluminate, transferring the resulting suspension to a reactor for crystallization at 70°C for 24 hours, cooling to room temperature, filtering, washing, and drying to finally obtain 4A zeolite.

Embodiment 2

[0022] After grinding the acid leaching slag of laterite nickel ore and sodium hydroxide, according to the molar ratio of sodium to silicon n(Na 2 O) / n(SiO 2 ) at a ratio of 1.4:1 and mixed evenly, and reacted with alkali at 550°C for 3 hours, according to the molar ratio of water to sodium n(H 2 O) / n(Na 2 O) After adding water in an amount of 70:1, filter to obtain the filtrate. Into the filtrate according to the molar ratio of silicon to aluminum in the system n(SiO 2 ) / n(Al 2 o 3 ) was added with sodium metaaluminate at a ratio of 2:1, the resulting suspension was transferred to a reactor for crystallization at 80°C for 12 hours, cooled to room temperature, filtered, washed, and dried to obtain zeolite 4A.

Embodiment 3

[0024] After grinding the acid leaching slag of laterite nickel ore and sodium hydroxide, according to the molar ratio of sodium to silicon n(Na 2 O) / n(SiO 2 ) at a ratio of 1.5:1, mixed evenly, and reacted with alkali at 600°C for 2 hours, according to the molar ratio of water to sodium n(H 2 O) / n(Na 2 O) After adding water in an amount of 90:1, filter to obtain the filtrate. Into the filtrate according to the molar ratio of silicon to aluminum in the system n(SiO 2 ) / n(Al 2 o 3 ) was added in an amount of 2:1, and the resulting suspension was transferred to a reaction kettle for crystallization at 90°C for 6 hours, cooled to room temperature, filtered, washed, and dried to finally obtain 4A zeolite.

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Abstract

Relating to the technical field of environment and materials, the invention provides a method for preparation of 4A zeolite from lateritic nickel ore acid leaching residue. The method comprises the steps of: subjecting lateritic nickel ore acid leaching residue and sodium hydroxide to alkali fusion reaction, dissolving the alkali fusion product in water and performing filtration to obtain filtrate, mixing the obtained filtrate with an aluminium source in certain proportion, and carrying out hydrothermal reaction, thus finally obtaining the 4A zeolite. The method provided by the invention has the characteristics of simple process, low cost and little slag, and has important practical significance for realizing high value-added comprehensive utilization of lateritic nickel ore acid leaching residue, thus being suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical fields of environment and materials, and in particular relates to a method for preparing 4A zeolite by using laterite nickel ore acid leaching slag as a raw material. Background technique [0002] Nickel ore mainly includes nickel sulfide ore and laterite nickel ore. Among them, nickel sulfide ore has high grade and high economic value. However, with the rapid development of industry, nickel sulfide resources are increasingly depleted. worldwide attention. Laterite nickel ore is a mixture formed by long-term weathering, leaching, and enrichment of nickel-containing ores. It has the characteristics of more lean ore, less rich ore, large storage capacity, and low cost. Laterite nickel ore acid leaching slag is the solid waste after nickel is extracted from laterite nickel ore. As the world's demand for nickel resources continues to increase, the discharge of laterite nickel ore acid leaching residues is increasing...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/14
CPCC01B39/14
Inventor 杜涛刘丽影车帅张鑫莆叶剑波张胜东
Owner NORTHEASTERN UNIV LIAONING
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