Mercury and activated carbon catalyst recovery process

A technology of activated carbon and catalyst, which is applied in the field of mercury and activated carbon catalyst recovery technology, can solve the problems of high mercury content in activated carbon residue, difficulty in recycling, low recovery rate, etc., and achieve the effects of reducing pollution impact, improving recovery rate and reducing leakage

Pending Publication Date: 2022-01-25
贵州蓝天固废处置有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, there are usually distillation and oxygen-controlled dry distillation methods for waste mercury catalyst recovery. Distillation can recover Hg elemental (liquid mercury), but the recovery rate of the existing recovery process of this method is low, only about 57%. Activated carbon residue is difficult to recycle due to high mercury content

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  • Mercury and activated carbon catalyst recovery process
  • Mercury and activated carbon catalyst recovery process
  • Mercury and activated carbon catalyst recovery process

Examples

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Embodiment Construction

[0028] Embodiments of the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solutions of the present invention more clearly, and therefore are only examples, rather than limiting the protection scope of the present invention. It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application shall have the usual meanings understood by those skilled in the art to which the present invention belongs.

[0029] see figure 1 with figure 2 , the mercury and activated carbon catalyst recovery process in one embodiment comprises the following steps:

[0030] (1) Pretreatment

[0031] Put the waste mercuric chloride catalyst and excess calcium oxide into the pretreatment reaction kettle and add water to stir and mix well, heat the mixed material in the reaction kettle to a temperature of 85°C ...

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Abstract

The invention belongs to the technical field of mercury recovery, and discloses a mercury and activated carbon catalyst recovery process. The mercury and activated carbon catalyst recovery process is improved on the basis of a distillation method, and mercury vapor condensation recovery is carried out after pretreatment, separation treatment and roasting distillation in a horizontal rotary external heating mercury distillation furnace, so that the recovery rate of Hg elementary substances is improved; activated carbon residues left after distillation are subjected to acid pickling with dilute hydrochloric acid, drying, water quenching and activation treatment, so that activated carbon can be recovered; and the process has relatively good economic and social benefits, and is worthy of popularization and application.

Description

technical field [0001] The invention relates to the technical field of mercury recovery, in particular to a mercury and activated carbon catalyst recovery process. Background technique [0002] Mercury, commonly known as "mercury", is a very rare element in the earth's crust. Mercury exists in a very small amount in nature as a pure metal and is the only liquid metal. Cinnabar, thirmalite, thirmalite, and some other minerals related to cinnabar are the most common deposits of mercury. [0003] At present, there are usually distillation and oxygen-controlled dry distillation methods for waste mercury catalyst recovery. Distillation can recover Hg elemental (liquid mercury), but the recovery rate of the existing recovery process of this method is low, only about 57%. Activated carbon residue is difficult to recycle due to its high mercury content. In order to ensure the recovery rate of mercury, the oxygen-controlled dry distillation method is mostly used now, but the recov...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): C22B7/00C22B9/02C22B43/00C01B32/36
CPCC22B7/00C22B43/00C22B9/02C01B32/36Y02P10/20Y02P20/584
Inventor刘杰
Owner贵州蓝天固废处置有限公司