High-valent metal fluorination catalyst and preparation method and application thereof

A technology of fluorination catalysts and high-valent metal ions, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve human health damage, difficulty in circulation, and environmental pollution And other issues

Active Publication Date: 2019-07-12
泉州宇极新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] There are following defects in the above-mentioned prior art: (1) in the process of adopting chlorine, oxygen or ammonium nitrate to carry out oxidation treatment to prepare high-valent chromium-based catalyst, it is easy to produce a large amount of highly toxic gas chromium hexafluoride with high carcinogenicity, which will bring serious environmental pollution and damage to human health; (2) use fluorine gas for fluorination treatment to obtain high-valent metal fluorides, such as high-valent chromium-based catalysts, high-valent molybdenum-based catalysts, high-valent tungsten-based catalysts, etc., fluorine gas is highly dangerous and highly toxic Gas, there are huge safety hazards in its transportation, storage, and use, so it is strictly controlled and difficult to circulate in the market

Method used

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  • High-valent metal fluorination catalyst and preparation method and application thereof
  • High-valent metal fluorination catalyst and preparation method and application thereof
  • High-valent metal fluorination catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] According to the composition of 100% and 0% of chromium ions and auxiliary elements, dissolve chromium trichloride in water, drop concentrated ammonia water for precipitation, adjust the pH value to 7.5, then wash with water, filter, and dry in an oven at 80°C for 36 hour, the resulting solid was pulverized, pressed into tablets to obtain a catalyst precursor, and 10 mL of the catalyst precursor was packed into a tube reactor made of Monel material with an inner diameter of 1 / 2 inch and a length of 30 cm, and nitrogen gas was fed into it for roasting at 450 ° C. 8 hours, nitrogen air velocity is 200h -1 , and then lower the temperature to 300°C, and at the same time pass a mixed gas composed of hydrogen fluoride and nitrogen with a mass ratio of 1:2, and the total space velocity of the gas is 220h -1 , activated for 24 hours; then the temperature was raised to 375°C, and at the same time, a mixed gas composed of nitrogen and nitrogen trifluoride with a mass ratio of 10:...

Embodiment 2

[0042] The catalyst preparation process is basically the same as in Example 1, except that the percentage composition of chromium ions and zinc elements is 90% and 10%.

Embodiment 3

[0044] The catalyst preparation process is basically the same as in Example 1, except that the percentage composition of chromium ions and cobalt elements is 90% and 10%.

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Abstract

The invention discloses 'a high-valent metal fluorination catalyst and a preparation method and application thereof', and belongs to the field of chemical synthesis. The high-valent metal fluorinationcatalyst is composed of high-valent metal ions and auxiliary agents, wherein the mass percentages of high-valent metal ions and auxiliary agents are 70%-100% and 0-30% in sequence. A 'fluorine storage material' is introduced in an oxidation stage to convert low-valent metal ions into high-valent metal ions. The high-valent metal fluorination catalyst has high use temperature, high catalytic activity and long service life, and is mainly used for preparing a fluorine-containing alkane through a fluorine-chlorine exchange reaction of gas-phase catalytic halogenated alkane and hydrogen fluoride under high temperature or preparing a fluorine-containing olefin through a fluorine-chlorine exchange reaction of gas-phase catalytic halogenated olefin and hydrogen fluoride under high temperature.

Description

technical field [0001] The invention relates to a high-valent metal fluorination catalyst, in particular to gas-phase catalyzing the fluorine-chlorine exchange reaction of halogenated alkanes at high temperature to prepare fluorine-containing alkanes, or gas-phase catalyzing the fluorine-chlorine exchange reaction of halogenated alkenes at high temperature to prepare fluorine-containing olefins. Background technique [0002] In order to fulfill the Montreal Protocol aimed at protecting the Earth's ozone layer, countries around the world have launched hydrofluorocarbons (HFCs) and hydrofluoroolefins (HFOs) with zero ODP values, thereby phasing out chlorofluorocarbons (CFCs) and hydrofluorocarbons (CFCs) with non-zero ODP values Chlorocarbons (HCFCs). At present, HFCs and HFOs have been widely used as refrigerants, cleaning agents, foaming agents, fire extinguishing agents, etching agents, etc. [0003] At present, the industrial production of HFCs or HFOs mostly adopts the m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/26B01J23/30B01J23/28B01J23/86C07C17/20C07C19/08C07C21/18C07C22/02
CPCB01J23/26B01J23/30B01J23/28B01J23/864C07C17/206C07C19/08C07C21/18C07C22/02
Inventor 权恒道张呈平贾晓卿
Owner 泉州宇极新材料科技有限公司
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