Method for synchronously recovering mercuric chloride, metal salt and active carbon in spent catalyst

A mercuric chloride and waste catalyst technology, applied in chemical instruments and methods, mercuric halide, separation methods, etc., can solve problems such as environmental pollution and scarcity of raw materials for new catalyst production, achieve high utilization rate, solve scarcity of raw materials, and restore activated carbon void effect

Inactive Publication Date: 2013-03-13
那风换
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a method for synchronous recovery of mercuric chloride, metal salts and activated carbon in waste catalysts, in order to obtain valuable elements in waste catalysts containing mercuric chloride and metal salts-activated carbon used in production Utilize it to achieve the goal of solving the problems of scarcity of raw materials for new catalyst production and environmental pollution caused by improper disposal of waste catalysts

Method used

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  • Method for synchronously recovering mercuric chloride, metal salt and active carbon in spent catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A batch of spent catalyst replaced from the converter, the main technical indicators:

[0028] Specific surface: 130m 2 / g

[0029] Mercury chloride content: 5.7%

[0030] Other metal chlorides (BaCl 2 , KCl) content: 13.0%

[0031] Water content: 3.4%

[0032] Carbon tetrachloride absorption rate: 25%

[0033] Bulk density: 610g / l

[0034] Particle size: 3~8mm

[0035] With the method for synchronous recovery of mercuric chloride, metal salt and gac provided by the present invention to reclaim the valuable elements therein, carry out according to the following sequence of steps:

[0036] (1) Drying of waste catalyst

[0037] Put the waste catalyst 1 into the drier 2, the drier 2 is a vertical reactor, and dry it below 80°C until the water content of the waste catalyst 1 is below 0.3%;

[0038] (2) Recovery of mercuric chloride

[0039] Put the dried waste catalyst in the retort 3 whose outer wall is uniformly heated to a temperature of 480°C with an electric ...

Embodiment 2

[0046] A batch of spent catalyst replaced from the converter, the main technical indicators:

[0047] Specific surface: 170m 2 / g

[0048] Mercury chloride content: 3.2%

[0049] Other metal chlorides (BaCl 2 , KCl) content: 15.4%

[0050] Water content: 2.0%

[0051] Carbon tetrachloride absorption rate: 27%

[0052] Bulk density: 592g / l

[0053] Particle size: 3~8mm

[0054] With the method for synchronous recovery of mercuric chloride, metal salt and gac provided by the present invention to reclaim the valuable elements therein, carry out according to the following sequence of steps:

[0055] (1) Drying of waste catalyst

[0056] Put the waste catalyst 1 into the drier 2, the drier 2 is a vertical reactor, and dry it below 80°C until the water content of the waste catalyst 1 is below 0.3%;

[0057] (2) Recovery of mercuric chloride

[0058] Put the dried waste catalyst in the retort 3 whose outer wall is evenly heated to 560°C with electric heating bands, and then...

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Abstract

The invention discloses a method for synchronously recovering mercuric chloride, metal salt and active carbon in a spent catalyst. The method is orderly implemented through the steps of spent catalyst drying, mercuric chloride recovery, complex perforation of active carbon and metal salt recovery, wherein mercuric chloride in the spent catalyst is recovered through destructive distillation in combination with condensation and aqueous solution absorption; deposits in the micropores of the active salt are displaced through hot water soaking in combination with bubbling by introducing air, thereby realizing the purpose of recovering the pores of the active carbon; and then the active carbon is recovered through drying and the metal salt is recovered through filtering; in the whole process, no pollutant is generated and discharged and the utilization rate of water is also extremely high; valuable elements in the spent catalyst are all recovered; and the valuable elements in the spent catalyst which is used in production previously and contains mercuric chloride, metal salt and active carbon are utilized, thereby achieving the purposes of solving the problems of scarce raw materials for new catalyst production and environmental pollution caused by inappropriate spent catalyst disposal; as a result, the method is obvious in economic benefit, environmental benefit and social benefit.

Description

technical field [0001] The invention relates to a method for comprehensive recovery of valuable elements in waste catalysts containing mercury chloride, metal salts and activated carbon, in particular to a method for synchronous recovery of mercury chloride, metal salts and activated carbon in waste catalysts. Background technique [0002] At present, China's polyvinyl chloride (PVC) production capacity has reached 22 million tons per year, becoming the world's largest PVC producer, but 80% of its raw material vinyl chloride (VCM) comes from calcium carbide, according to poor oil, little gas, In the country where coal resources are relatively abundant, calcium carbide PVC will still dominate for a long time, but calcium carbide PVC has its own shortcomings. Calcium carbide reacts with water to form acetylene, and acetylene and hydrogen chloride form VCM under the action of mercury catalyst. PVC is produced by polymerization, and the catalyst used is activated carbon as a car...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/34C01D3/04C01F11/24C01G13/04B01J27/138
Inventor 那风换薛之化刘东升高淑芝孙鸿雁
Owner 那风换
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