Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of regeneration method of waste activated carbon in wet smelting extraction process

A waste activated carbon and hydro-smelting technology, which is applied in separation methods, filter regeneration, chemical instruments and methods, etc., can solve the problems of activated carbon quality loss, high investment and energy consumption, and achieve the effect of realizing regeneration and improving regeneration effect

Active Publication Date: 2021-07-27
湖南鸿捷新材料有限公司
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the commonly used regeneration method in industry is mainly high-temperature heating method, but this method has high investment and energy consumption, harmful gas is generated by the decomposition of adsorbate, and the quality loss of activated carbon will also be caused during the heat treatment process.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Get 100g waste activated carbon and rinse with 500ml pure water, obtain filtrate and filter residue (activated carbon) after filtration separation. The spent activated carbon after washing is to be regenerated. Configure 10vol.% OEP-70 and 10vol.% OP-10 emulsion 300ml, wherein the solvent is 1M sodium hydroxide solution, according to the solid-to-liquid ratio of 1g: 3mL, add the mixed emulsion to the above 100g waste activated carbon, open Stir ultrasonically, and control the stirring speed to 400rpm. Stir at 50 °C for 4 h. After the reaction, the activated carbon was washed and dried, and the obtained regenerated activated carbon was tested, and its iodine value was 820, which was restored to 96.5% of the original activated carbon (850).

Embodiment 2

[0035] Get 100g waste activated carbon and rinse with 500ml pure water, obtain filtrate and filter residue (activated carbon) after filtration separation. The spent activated carbon after washing is to be regenerated. Configure 10vol.% OEP-70 and 10vol.% MOA-3 emulsion 400ml, wherein solvent is 1.5M sodium hydroxide solution, by 1g: 4mL solid-to-liquid ratio, this mixed emulsion is added in the above-mentioned 100g waste activated carbon, Turn on the ultrasonic stirring and control the stirring speed to 500rpm. Stir at 60 °C for 6 h. After the reaction, the activated carbon was washed and dried, and the obtained regenerated activated carbon was tested, and its iodine value was 825, which was restored to 97% of the original activated carbon (850).

Embodiment 3

[0037] Get 100g waste activated carbon and rinse with 500ml pure water, obtain filtrate and filter residue (activated carbon) after filtration separation. The spent activated carbon after washing is to be regenerated. Configure 8vol.% OEP-70 and 7vol.% MOA-9 emulsion 200ml, wherein solvent is 0.75M sodium hydroxide solution, by 1g: 2mL solid-to-liquid ratio, this mixed emulsion is added in the above-mentioned 100g waste activated carbon, Turn on the ultrasonic stirring and control the stirring speed to 300rpm. Stir at 40 °C for 4 h. After the reaction, the activated carbon was washed and dried, and the obtained regenerated activated carbon was tested, and its iodine value was 800, which was restored to 94% of the original activated carbon (850).

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the technical field of activated carbon regeneration, and specifically discloses a method for regenerating waste activated carbon in a hydrometallurgy extraction process. After the waste activated carbon is washed with water, it is regenerated in a mixed solution containing an emulsifier and an alkali, followed by solid-liquid separation, The regenerated activated carbon is obtained by washing and drying; the HLB value of the emulsifier is 6-14. The invention can effectively regenerate the waste activated carbon in this application field after being washed with water in advance, and then synergistically treated with an emulsifier and alkali under the same system, so that the iodine value of the regenerated activated carbon can be restored to more than 90% of the original value.

Description

technical field [0001] The invention relates to the technical field of waste activated carbon regeneration, in particular to an activated carbon regeneration method used in the extraction process of hydrometallurgy. Background technique [0002] Activated carbon material is amorphous carbon obtained through processing, has a large specific surface area, and has good adsorption capacity for gases, inorganic or organic substances in solution, and colloidal particles. [0003] When the extraction method is used to produce salt solution in the hydrometallurgy industry, due to the use of organic solvents such as P204, P507, and sulfonated kerosene, oil will remain in the product. Activated carbon is commonly used in production to remove oil from the solution. The use period of conventional activated carbon is about 15 days. After the adsorption of activated carbon is saturated, the iodine value decreases, and the adsorption capacity decreases sharply. At this time, the activated...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/34B01J20/20
CPCB01J20/3416B01J20/3475
Inventor 任崇赵超熊磊王康均陈立新何舟刘强
Owner 湖南鸿捷新材料有限公司