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Method for preparing 1,2-dichlorobenzene waste gas removal catalyst

A technology of catalyst and dichlorobenzene, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve harmful problems and achieve the effect of simple operation process and low equipment requirements

Active Publication Date: 2019-10-15
CHANGSHU INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of catalytic incineration, when the incineration conditions are determined, the removal efficiency of 1,2-dichlorobenzene depends on the catalytic characteristics of the catalyst itself. However, traditional catalysts will produce harmful carbon monoxide in the process of catalytic oxidation of 1,2-dichlorobenzene

Method used

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  • Method for preparing 1,2-dichlorobenzene waste gas removal catalyst
  • Method for preparing 1,2-dichlorobenzene waste gas removal catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Effect of carbon dioxide gas exposure per unit volume on the removal rate of chromium in waste liquid and the performance of catalyst for the removal of 1,2-dichlorobenzene waste gas

[0019] Preparation of waste liquid disposal and 1,2-dichlorobenzene waste gas removal catalyst: such as figure 1 As shown, take a unit volume of chromium-containing waste liquid and place it in a sealed container, and then expose 0.5, 0.7, 0.9, 1, 1.5, 2, 2.2, 2.5, 3 carbon dioxide gas per unit volume to obtain carbonation containing chromium waste liquid; according to ferrous ions and hexavalent chromium ion mol ratio 5:1 in the unit volume of chromium containing waste liquid, ferrous carbonate powder is placed in carbonation containing chromium waste liquid In the process, stir under sealed conditions until the ferrous carbonate powder is completely dissolved to obtain the reduced carbonation chromium-containing waste liquid; weigh the calcium hydroxide powder according to the molar rat...

Embodiment 2

[0028] Influence of the molar ratio of ferrous ions to hexavalent chromium ions in chromium-containing waste liquid on the removal rate of chromium in waste liquid and the performance of 1,2-dichlorobenzene waste gas removal catalyst

[0029] Waste liquid disposal and preparation of 1,2-dichlorobenzene waste gas removal catalyst: take a unit volume of chromium-containing waste liquid and place it in a sealed container, then expose 2 unit volumes of carbon dioxide gas into the container to obtain carbonation containing Chromium waste liquid, according to the molar ratio of ferrous ions to hexavalent chromium ions in unit volume of chromium-containing waste liquid: 4:1, 4.5:1, 4.8:1, 5:1, 6:1, 7:1, 7.2:1, 7.5:1, 8:1 Weigh ferrous carbonate powder respectively and place it in the carbonation chromium-containing waste liquid, stir under sealed conditions until the ferrous carbonate powder is completely dissolved, and obtain the reduced carbonation chromium-containing waste liquid. ...

Embodiment 3

[0035] Effect of molar ratio of ferrous ion to calcium ion on the removal rate of chromium in waste liquid and the performance of catalyst for the removal of 1,2-dichlorobenzene exhaust gas

[0036] Waste liquid disposal and preparation of 1,2-dichlorobenzene waste gas removal catalyst: take a unit volume of chromium-containing waste liquid and place it in a sealed container, then expose 2 unit volumes of carbon dioxide gas into the container to obtain carbonation containing Chromium waste liquid, according to the molar ratio of ferrous ions and hexavalent chromium ions in unit volume of chromium-containing waste liquid is 7:1, weigh ferrous carbonate powder and place it in carbonated chromium-containing waste liquid, and stir under sealed conditions until ferrous carbonate powder Completely dissolve to obtain the reduced carbonated chromium-containing waste liquid, according to the molar ratio of ferrous ion to calcium ion 1:2, 1:2.5, 1:2.8, 1:3, 1:4, 1:5, 1:5.2, 1 :5.5, 1:6 ...

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Abstract

The invention discloses a method for preparing a 1,2-dichlorobenzene waste gas removal catalyst. The method comprises the following steps: placing chromium-containing waste liquid in a sealed container, and aerating carbon dioxide into the container, so as to obtain carbonated chromium-containing waste liquid; adding ferrous carbonate into the carbonated chromium-containing waste liquid, and performing stirring while sealing, so as to obtain reduced carbonated chromium-containing waste liquid; finally, adding calcium hydroxide into the reduced carbonated chromium-containing waste liquid, performing stirring under a sealed condition until a precipitate is produced, performing solid-liquid separation, and performing thermal decomposition on the solid in an atmosphere furnace, thereby obtaining the 1,2-dichlorobenzene waste gas removal catalyst. According to the method disclosed by the invention, the 1,2-dichlorobenzene waste gas removal catalyst is prepared by recycling the chromium-containing waste liquid, so that harmless disposal of the chromium-containing waste liquid is saved, and a new idea is provided for disposal and utilization of the chromium-containing waste liquid; the problem that carbon monoxide pollution is produced by the traditional 1,2-dichlorobenzene waste gas in a catalytic oxidation process is solved.

Description

technical field [0001] The invention relates to a preparation method of a waste gas removal catalyst, in particular to a preparation method of a 1,2-dichlorobenzene waste gas removal catalyst. Background technique [0002] Chromium-containing waste liquid comes from many industries such as metallurgy, electroplating, leather printing and dyeing, etc. The sneak discharge or improper disposal of chromium-containing waste liquid will pose a serious threat to the surrounding ecological environment. Chromium in water usually exists in two forms: trivalent (Cr(III)) and hexavalent (Cr(VI)). The toxicity of hexavalent chromium is about 100 times that of trivalent chromium, and the content of hexavalent chromium in drinking water is the largest. The limit is 0.05mg / L. Generally, when the content of hexavalent chromium in water is greater than 0.1 mg / L, it will have a toxic effect on the human body. At present, the disposal methods for chromium-containing waste liquid mainly includ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/26B01J27/232B01J37/08B01J37/16B01D53/86B01D53/70
CPCB01J27/232B01J23/26B01J37/16B01J37/082B01J37/0036B01D53/8662B01D2258/02
Inventor 黄涛宋东平张树文刘龙飞刘万辉陶骏骏周璐璐徐娇娇
Owner CHANGSHU INSTITUTE OF TECHNOLOGY
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