Catalyst for preparing chlorine by oxidizing hydrogen chloride, preparation method and applications thereof

A catalyst, hydrogen chloride technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, preparation with chloride, physical/chemical process catalyst, etc., can solve the problems of poor activity, high process cost, poor stability, etc., to achieve Improve the activity, the process is simple and easy to operate, and the effect of increasing stability

Active Publication Date: 2020-04-17
ZHEJIANG NORMAL UNIVERSITY +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the defects of high process cost, poor activity and poor stability of the catalyst used in the oxidation of hydrogen chloride to prepare chlorine in the prior art, thereby providing a catalyst with low process cost, high activity and high stability Catalyst for the oxidation of hydrogen chloride to chlorine

Method used

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  • Catalyst for preparing chlorine by oxidizing hydrogen chloride, preparation method and applications thereof
  • Catalyst for preparing chlorine by oxidizing hydrogen chloride, preparation method and applications thereof
  • Catalyst for preparing chlorine by oxidizing hydrogen chloride, preparation method and applications thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1～ Embodiment 16

[0048] Take a certain amount of TiCl at room temperature 4 、RuCl 3 and NaF were dissolved in 0.1mol / L hydrochloric acid solution, and then the mixed solution was transferred to a polytetrafluoro-lined stainless steel reactor, crystallized overnight, and after the reactor was cooled, it was centrifuged at a speed of 5000r / min , and washed 4-5 times with ultrapure water, the obtained white sample was dried overnight in a vacuum oven at 100 ° C, and finally the sample was calcined in a muffle furnace for 4 hours to obtain RuO with sea urchin morphology 2 / TiO 2 catalyst.

[0049] The TiCl of embodiment 1~embodiment 16 4 、RuCl 3 And the dosage of NaF, the pH value of the crystallization solution, the crystallization temperature, the crystallization time and the calcination temperature are shown in Table 1 below.

[0050] Table 1. The process operating conditions of embodiment 1~embodiment 16

[0051]

[0052]

[0053] The RuO of the sea urchin morphology that embodimen...

Embodiment 16

[0056] HCl conversion and Cl of Example 16 2 Space-time yield (kg(Cl 2 ) / kg (catalyst) / h) as shown in Table 9.

Embodiment 17～ Embodiment 21

[0058] The preparation method that embodiment 17~embodiment 21 involves is identical with embodiment 14, and the difference between embodiment 17~embodiment 21 and embodiment 14 is that the reaction temperature of catalyst is different in application, and embodiment 17~embodiment 21 The reaction temperature is shown in Table 2. The HCl transformation rate and Cl of embodiment 17~embodiment 21 2 Space-time yield (kg(Cl 2 ) / kg (catalyst) / h) as shown in Table 9.

[0059] Table 2. The reaction temperature of embodiment 17~embodiment 21

[0060] Reaction temperature (°C) Example 17 330 Example 18 340 Example 19 360 Example 20 370 Example 21 380

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Abstract

The invention discloses a catalyst for preparing chlorine by oxidizing hydrogen chloride, a preparation method and applications thereof, wherein the catalyst comprises, by molar fraction, 25 to 70 parts of a titanium salt, 0.25 to 3.5 parts of a ruthenium salt, and 0.5-200 parts of a fluoride. The preparation method comprises the following steps: dissolving a titanium salt, a ruthenium salt and afluoride in a hydrochloric acid solution, and stirring to form a mixed solution; crystallizing the mixed solution at a temperature of 150 to 250 DEG C; and calcining the crystallized solid to obtain the required catalyst. The catalyst for preparing chlorine by oxidizing hydrogen chloride is low in process cost, and has high activity and high stability under a dilute oxygen condition.

Description

technical field [0001] The invention relates to the technical field of catalyst preparation, in particular to a catalyst for preparing chlorine by oxidation of hydrogen chloride, a preparation method and application thereof. Background technique [0002] Cl 2 It is a very important chemical product and basic raw material, widely used in chemical, metallurgy, papermaking, textile, pharmaceutical, petrochemical and environmental protection industries. There are more than 200 kinds of chlorine-related products in my country, and there are more than 70 main varieties. 2 The production capacity represents the development level of a country's chemical industry. However, in the production process of most chlorine-containing products, the utilization rate of chlorine element is low. For example, in the production process of organochlorine products such as chlorinated aromatic hydrocarbons and chlorinated alkanes, the raw material Cl 2 The utilization rate of chlorine atoms in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/46C01B7/04
CPCB01J23/462B01J23/002C01B7/04
Inventor 马睿许春慧傅仰河卢信清王雪王宁伟王树华黄明星何坚华周永卫朱伟东
Owner ZHEJIANG NORMAL UNIVERSITY
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