Material with double functional groups, namely silica gel-supported chelating amine and thiourea, and preparation method of material

A dual-function, composite material technology, applied in the direction of chemical instruments and methods, other chemical processes, process efficiency improvement, etc., can solve the problem that the preparation method has not yet been reported, achieve excellent adsorption and desorption of gold performance, easy industrial production, process simple effect

Inactive Publication Date: 2015-03-25
工信华鑫科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, in the existing published related patents and literatures, there is no report on the composite adsorption gold materia

Method used

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  • Material with double functional groups, namely silica gel-supported chelating amine and thiourea, and preparation method of material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Preparation of CP silica gel.

[0048] Physically humidify the spherical coarse-porous silica gel until the weight gain of the silica gel reaches 20%. Put the humidified silica gel into a single-necked round bottom flask, add 0.5-2.0mol / L hydrochloric acid whose mass is 4 times the mass of silica gel, turn on the rotary stirring, the speed is 30 rpm, the temperature is controlled at 105°C, condensed and refluxed, and the alkali The liquid absorbs the tail gas, and the reaction time is 6 hours. After the reaction, the temperature is naturally lowered to below 40°C, filtered, and the mother liquor is recovered and recycled, and then the silica gel is washed with deionized water until it is neutral, filtered, and dried in a drying oven at 120°C until constant Heavy. Quickly transfer the silica gel dried to constant weight into the hydration column, and the air is provided by the oil-free air compressor, and the air enters the airtight container filled with saturated potas...

Embodiment 2

[0055] The preparation of aminated material is as embodiment 1

[0056] Preparation of silica gel-loaded chelating amine and thiourea bifunctional composite adsorption materials.

[0057] Take 5 g of triphosgene, 30 ml of dichloromethane, and 0.2 ml of N,N-dimethylformamide in a reaction flask, stir mechanically at a speed of 140 rpm, and a reaction temperature of 2°C, and add 5 ml of diethylene glycol, tail gas absorption with lye, the reaction time is 15 hours, 20 g of thiocyanate is added to the reaction bottle in 6 times within 2 hours, the reaction temperature is controlled at 5 °C, and the reaction time is 8 h, after the reaction was completed, the solid salt was filtered off, and then the product was washed with 80 ml 0°C potassium chloride aqueous solution for 4 times, separated, and the lower organic phase was taken. Take 25g of the aminated material and place it in a three-necked flask, add 60 ml of absolute ethanol, let it soak for 0.5h, then add the lower organic ...

Embodiment 3

[0060] Preparation of CP silica gel.

[0061] Physically humidify the spherical coarse-porous silica gel until the weight gain of the silica gel reaches 25%. Add the humidified silica gel into a single-necked round bottom flask, add 1.5 mol / L hydrochloric acid whose mass is 3 times that of the silica gel, turn on the rotary stirring at a speed of 40r / min, control the temperature at 100°C, condense and reflux, and the lye absorbs the tail gas , The reaction time is 8 hours. After the reaction, the temperature is naturally lowered to below 40°C, filtered, and the mother liquor is recovered and recycled, and then the silica gel is washed with deionized water until it is neutral, filtered, and dried in a drying oven at 120°C to constant weight. Quickly transfer the silica gel that has been dried to constant weight into the hydration column, and the air is supplied by an oil-free air compressor. The air enters a closed container filled with saturated sodium bromide, and the tempera...

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Abstract

The invention discloses an adsorption material with double functional groups, namely silica gel-supported chelating amine and thiourea, and a preparation method of the adsorption material. An organic/inorganic composite adsorption material with the double functional groups, namely chelating amine and thiourea, is obtained by taking porous silica gel as an inorganic rigid framework and performing the steps of pickling, hydrating, alkylating and bonding the double functional groups, namely chelating amine and thiourea. The prepared double functional group/silica gel composite material has excellent gold adsorption performance, and can be used for separating, enriching, concentrating and extracting gold from a gold leaching solution and a gold tail solution, thereby realizing development of a gold production technology to a pollution-free direction; and simultaneously, after the material is regenerated, the material can be recycled for many times. The gold adsorption material is simple in preparation process, extensive in raw material sources and easy to realize industrialization.

Description

technical field [0001] The invention belongs to the technical field of heavy metal adsorption materials, and relates to a silica gel-loaded chelating amine and thiourea bifunctional group composite adsorption material and a preparation method thereof, which are applied to the separation, enrichment, concentration and extraction of gold from gold leachate and gold tail liquid . Background technique [0002] Gold is a metal discovered and utilized by humans earlier. Because of its rarity, specialness and preciousness, it has been regarded as the head of hardware since ancient times. It has the title of "King of Metals", enjoys a reputation unmatched by other metals, is a symbol of wealth and luxury, and is used as financial reserves, currency, jewelry At the same time, gold also has extremely high corrosion resistance stability, good electrical conductivity, thermal conductivity and manufacturability, and is widely used in the most important modern high-tech industries, such ...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/30C22B3/24C22B7/00C22B11/00
CPCY02P10/20
Inventor 邱建宁徐纯理韩洪春
Owner 工信华鑫科技有限公司
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