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Method for preparing mercury-containing catalyst by combining microwave with ultrasonic regenerated coal

An ultrasonic and mercury catalyst technology, which is applied in the field of microwave combined ultrasonic regeneration of coal to make mercury-containing catalysts, can solve the problems of large consumption of reagents, complicated treatment process, and lack of efficient and reasonable mercury chloride, and achieves short treatment time and process flow. Simple, overcoming the effect of slow heat transfer efficiency

Inactive Publication Date: 2018-12-28
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the continuous increase of domestic PVC production and increasingly serious environmental problems, the treatment of mercuric chloride solid waste produced by PVC production has not found an efficient and reasonable solution.
This method has problems such as complicated processing and large consumption of reagents.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A method for combining microwave and ultrasonic to regenerate coal into a mercury-containing catalyst, the specific steps are as follows:

[0024] (1) Mix 20g of waste mercury catalyst with 0.04L of ammonia water to obtain mixture A, with a solid-to-liquid ratio of 1:2;

[0025] (2) Under ultrasonic conditions, where the ultrasonic power is 20w and the ultrasonic frequency is 20Hz, the mixture A obtained in step (1) is leached for 200min, filtered and dried;

[0026] (3) Microwave low-temperature drying: firstly, the product obtained in step (2) was dried by microwave at a low temperature of 50°C for 30 minutes;

[0027] (4) Microwave medium-temperature heating: after step (3) microwave low-temperature drying, microwave medium-temperature heating at 150°C for 100 minutes to obtain mercury removal waste catalyst and Hg steam;

[0028] (5) recovering the Hg vapor obtained in step (4) through condensation to obtain liquid pure mercury;

[0029] (6) Microwave high-tempera...

Embodiment 2

[0032] A method for combining microwave and ultrasonic to regenerate coal into a mercury-containing catalyst, the specific steps are as follows:

[0033] (1) Mix 20g of waste mercury catalyst with 0.1L of ammonia water to obtain mixture A, with a solid-to-liquid ratio of 1:5;

[0034] (2) Under ultrasonic conditions, where the ultrasonic power is 50w and the ultrasonic frequency is 40Hz, the mixture A obtained in step (1) is leached for 30 minutes, filtered and dried;

[0035] (3) Microwave low-temperature drying: first, the product obtained in step (2) was dried by microwave at low temperature at 150°C for 15 minutes;

[0036] (4) Microwave medium-temperature heating: after step (3) microwave low-temperature drying, microwave medium-temperature heating at 300°C for 30 minutes to obtain mercury removal waste catalyst and Hg steam;

[0037] (5) recovering the Hg vapor obtained in step (4) through condensation to obtain liquid pure mercury;

[0038] (6) Microwave high-temperat...

Embodiment 3

[0041] A method for combining microwave and ultrasonic to regenerate coal into a mercury-containing catalyst, the specific steps are as follows:

[0042] (1) Mix 20g of waste mercury catalyst with 0.2L of ammonia water to obtain mixture A, with a solid-to-liquid ratio of 1:10;

[0043] (2) Under ultrasonic conditions, where the ultrasonic power is 80w and the ultrasonic frequency is 80Hz, the mixture A obtained in step (1) is leached for 30 min, filtered and dried;

[0044] (3) Microwave low-temperature drying: first, the product obtained in step (2) was dried by microwave at low temperature at 150°C for 20 minutes;

[0045] (4) Microwave medium-temperature heating: after step (3) microwave low-temperature drying, microwave medium-temperature heating at a temperature of 400°C for 10 minutes to obtain mercury removal waste catalyst and Hg steam;

[0046] (5) recovering the Hg vapor obtained in step (4) through condensation to obtain liquid pure mercury;

[0047] (6) Microwave...

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Abstract

The invention relates to a method for preparing a mercury-containing catalyst by combining microwave with ultrasonic regenerated coal, and belongs to the technical field of recycling of coal preparedwaste mercury catalysts. The method comprises the following steps: uniformly mixing a coal prepared waste mercury catalyst with ammonia water to obtain a mixture A; under ultrasonic conditions, carrying out leaching reaction on the mixture A for 20 to 240 minutes, filtering and drying; carrying out microwave drying on the obtained product under the conditions of 50 to 150 DEG C for 5 to 30 minutes; carrying out microwave heating under the conditions of 150 to 400 DEG C for 5 to 120 minutes to obtain a mercury demercurated waste catalyst and Hg vapor; condensing and recycling the obtained Hg vapor to obtain liquid pure mercury; introducing activated gas and carrying out microwave activation on the obtained mercury demercurated waste catalyst under the conditions of 500 to 800 DEG C for 10 to 100 minutes to obtain activated carbon for a regenerated mercury waste catalyst. The method disclosed by the invention has the advantages of simple overall process flow, low cost of raw materials, capability of achieving the regeneration of the activated carbon and efficient recovery of mercury, economic value and actual production significance.

Description

technical field [0001] The invention discloses a method for regenerating a mercury-containing catalyst from coal with microwave combined with ultrasonic waves, which belongs to the recovery and treatment method of waste mercury-containing catalyst from coal. Background technique [0002] As an important catalyst for the production of PVC monomer by acetylene method, mercury chloride catalyst has always been in an irreplaceable position in China. However, with the continuous increase of domestic PVC production and the increasingly serious environmental problems, no efficient and reasonable solution has been found for the treatment of mercury chloride solid waste produced by PVC production. Mercury chloride catalyst is based on coal-based activated carbon loaded with mercury chloride as an indispensable catalyst in PVC production. Due to the limitation of the acetylene process itself, the mercury chloride in the mercury chloride catalyst cannot be completely reacted. The amou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/20B01J21/18B01J38/66B01J38/02B01J38/04B01J38/06C22B7/00C22B43/00
CPCC22B7/006C22B43/00B01J21/18B01J21/20B01J38/02B01J38/04B01J38/06B01J38/66Y02P10/20
Inventor 张利波刘健刘晨辉林国程松
Owner KUNMING UNIV OF SCI & TECH
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