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Fluorination catalyst and preparation method and application thereof

A fluorination catalyst and fluorination technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, halogen substitution preparation, etc., can solve the problem of low selectivity and yield of HFO-1234yf, easy deactivation and conversion of fluorination catalysts Low efficiency and other problems, to achieve excellent catalytic activity, reduce production costs, and avoid environmental pollution

Active Publication Date: 2019-04-05
DONGGUAN DONGYANG SOLAR SCI RES & DEV CO LTD
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AI Technical Summary

Problems solved by technology

[0018] Aiming at the problems of low conversion rate of HCFO-1233xf, low selectivity and yield of HFO-1234yf, easy deactivation and short service life of fluorination catalysts in the prior art when fluorination catalysts catalyze the preparation of HFO-1234yf, this paper The invention provides a new method for preparing a fluorination catalyst, first preparing a metal additive / carbon shell material with a specific shell structure and pores, and then blending with chromium oxide to prepare a fluorination catalyst

Method used

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  • Fluorination catalyst and preparation method and application thereof
  • Fluorination catalyst and preparation method and application thereof

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preparation example Construction

[0049] The invention provides a kind of preparation method of fluorination catalyst, comprises the following steps:

[0050] S1: Grinding metal additive salts and organic ligands and placing them in a microwave oven for microwave reaction to obtain metal additive / organic ligand compounds;

[0051] S2: Roasting the metal additive / organic ligand compound to obtain the metal additive / carbon shell material;

[0052] S3: Blending the metal additive / carbon shell material with chromium oxide, pressing into tablets, calcining, and fluorinating to prepare a fluorination catalyst.

[0053] The invention prepares the metal additive / organic ligand compound through a microwave reaction method, and the microwave reaction provides heat for the metal additive / carbon shell structure to accelerate the reaction, thereby avoiding the use of organic solvents and avoiding environmental pollution.

[0054] According to some embodiments of the present invention, the mass ratio of the metal promoter ...

Embodiment approach

[0066] According to some embodiments of the present invention, the organic ligand is 2,2-biquinoline-4,4-dicarboxylic acid, 2,2-bipyridine-4,4-dicarboxylic acid, 2,2-bipyridine- One or more of 5,5-dicarboxylic acids.

[0067] In some embodiments, the organic ligand is 2,2-bipyridine-4,4-dicarboxylic acid, 2,2-bipyridine-5,5-dicarboxylic acid, 2,2-biquinoline-4, One of the 4-dicarboxylic acids.

[0068] According to some embodiments of the present invention, the grinding time in step S1 is 1-120 min.

[0069] In some embodiments, the grinding time in step S1 is 5-60 min.

[0070] According to some embodiments of the present invention, the microwave power in the microwave reaction in step S1 is 100-1000w, and the microwave reaction time is 1-60min.

[0071] In some embodiments, the microwave power in the microwave reaction in step S1 is 100-1000w, preferably the microwave reaction time is 5-30min.

[0072] In the preparation method provided by the present invention, the calc...

Embodiment 1

[0090] Weigh 6g of cerium nitrate, 3g of zirconium nitrate, and 4.5g of 2,2-bipyridine-4,4-dicarboxylic acid in a mortar, grind for 5 minutes at room temperature, and place in a microwave oven with a power of 1000w for 5 minutes to prepare The metal Ce-Zr / organic ligand compound is obtained; the metal Ce-Zr / organic ligand compound is placed under a nitrogen atmosphere, and roasted at 800°C for 3h to obtain a metal additive / carbon shell material; the metal additive / carbon The shell material was blended with 450g of self-made chromium oxide, pressed into cylindrical particles, calcined at 600°C for 2h in air atmosphere, and finally fluorinated at 400°C for 6h to obtain the HFO-1234yf fluorination catalyst.

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Abstract

The invention provides a fluorination catalyst and a preparation method and application thereof. The preparation method comprises the steps of using a microwave combined blending method, preparing a metal aid / organic ligand compound by a microwave method at first, then roasting to prepare a metal aid / carbon shell layer material, and finally, blending the metal aid / carbon shell layer material with self-made chromium oxide, tabletting, roasting, and carrying out fluorination to prepare the fluorination catalyst. The fluorination catalyst is particularly suitable for being used for preparing and synthesizing HFO-1234yf from HCFO-1233xf.

Description

technical field [0001] The invention relates to the technical field of catalyst preparation, in particular to a fluorination catalyst, a preparation method and its application in synthesizing HFO-1234yf. Background technique [0002] According to the "Montreal Protocol" and the EU's F-Gas regulation, the third-generation HFC with a high GWP value will be phased out, and HFC-134a with a GWP value as high as 1340 will bear the brunt. The fourth-generation refrigerant tetrafluoropropene (HFO-1234yf), as a single refrigerant, has excellent environmental parameters and performance (GWP value is 4, ODP value is 0, life cycle climate performance (LCCP) is lower than HFC-134a, the atmospheric decomposition product is the same as HFC-134a, and its system performance is better than HFC-l34a.) and the original vehicle air-conditioning system does not require major changes. HFO-1234yf's replacement of HFC-134a has been recognized by most European and American car companies and has beco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/128B01J27/135B01J27/138C07C17/20C07C21/18
Inventor 李义涛黄永锋何鑫余航孙明刚唐火强
Owner DONGGUAN DONGYANG SOLAR SCI RES & DEV CO LTD
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