A kind of fluorination catalyst and its preparation method and application

A technology of fluorination catalyst and metal assistant, which is applied in physical/chemical process catalysts, chemical instruments and methods, halogen substitution preparation, etc. problems such as low conversion rate, to achieve excellent catalytic activity, reduce production costs, and avoid environmental pollution.

Active Publication Date: 2019-10-18
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

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  • A kind of fluorination catalyst and its preparation method and application
  • A kind of fluorination catalyst and its preparation method and application

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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 Patents(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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