Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Chromium-free and environment-friendly catalyst for synthesis of 3,3,3-trifluoropropene by gas-phase fluorination

A technology of trifluoropropene and catalyst, which is applied in the fields of physical/chemical process catalyst, organic chemistry, dehydrohalogenation preparation, etc., can solve the problems of ecological environment pollution, human health threat, etc., and achieves good high temperature anti-sintering ability and anti-sintering performance. Superior and improved mass transfer effect

Active Publication Date: 2022-02-22
XIAN MODERN CHEM RES INST
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The catalysts for gas-phase fluorination reactions reported above all use chromium as the core component. However, as a heavy metal element, chromium, a large amount of discharge will cause serious pollution to the ecological environment; especially hexavalent chromium is a highly toxic substance that is harmful to animals and humans. health poses a serious threat

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Chromium-free and environment-friendly catalyst for synthesis of 3,3,3-trifluoropropene by gas-phase fluorination
  • Chromium-free and environment-friendly catalyst for synthesis of 3,3,3-trifluoropropene by gas-phase fluorination
  • Chromium-free and environment-friendly catalyst for synthesis of 3,3,3-trifluoropropene by gas-phase fluorination

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: prepare M / MgF 2 catalyst

[0028] Dissolve 1.0M magnesium source and 0.01-0.1M modified metal ions in 50mL polyol solvent, and add the fluorinating reagent dropwise to the above solution under stirring at 150-240°C for 15 minutes. Stir again for 6-12h to obtain M / MgF 2 Dry gel; then calcined in an air or hydrogen atmosphere at 300-500°C for more than 5 hours, and finally fluorinated the calcined material at a temperature of 150-400°C to obtain a catalyst. The fluorine reagents are gaseous hydrogen fluoride and dichlorodifluoromethane , one chlorodifluoromethane, one chlorotrifluoromethane any one. The textural properties of magnesium fluoride prepared under different magnesium sources, polyol solvents, coagulants, fluorinating reagents, and calcination temperatures are shown in Table 1.

[0029] The physicochemical property result of the magnesium fluoride-based catalyst of table 1 embodiment 1

[0030]

[0031]

Embodiment 2

[0033] Adopt the same method to prepare M / MgF in embodiment 1 2 Catalyst, apply it to the gas-phase fluorination of 1,1,1,3-tetrachloropropane to synthesize HFO-1243f. After running for 12 hours, the reaction results are as follows:

[0034] The reaction evaluation result of the magnesium fluoride-based catalyst of table 2 embodiment 2

[0035]

Embodiment 3

[0037] Adopt the same method to prepare M / MgF in embodiment 1 2 Catalyst, apply it to the gas-phase fluorination of 1,1,1,3-tetrachloropropane to synthesize HFO-1243f. After running for 12 hours, the reaction results are as follows:

[0038] The reaction evaluation result of the magnesium fluoride-based catalyst of table 3 embodiment 3

[0039]

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
specific surface areaaaaaaaaaaa
Login to View More

Abstract

The invention discloses a chromium-free environment-friendly catalyst for synthesizing 3,3,3-trifluoropropene by gas-phase catalysis of 1,1,1,3-tetrachloropropane and hydrogen fluoride and a preparation method thereof. It is to solve the environmental problems existing in traditional chromium-based fluorination catalysts. Extensive use of heavy metal chromium will cause a series of serious pollution and health problems. The catalyst disclosed by the present invention consists of M / MgF 2 , where the matrix MgF 2 It has a rutile phase and a nano-spherical structure with a specific surface area greater than 120m 2 / g, high stability MgF with excellent sintering resistance at 500°C 2 , the active component M is selected from Co 3+ 、Ni 2+ , Fe 3+ , Zn 2+ , La 3+ 、Al 3+ , Ga 3+ , Mn 4+ 、Cu 2+ one or more of them. The preparation of the catalyst comprises the following steps: (1) preparing a polyol solution containing a magnesium source and doped with metal ions, adding a fluorination reagent dropwise at 150-240°C to obtain a catalyst xerogel; (2) drying the xerogel at 300-240°C Calcined at 500°C, and finally fluorinated at 150-400°C to obtain a chromium-free high-performance catalyst.

Description

technical field [0001] The invention relates to a catalyst, in particular to a chromium-free and environment-friendly catalyst for synthesizing 3,3,3-trifluoropropene by gas-phase catalyzing the reaction of 1,1,1,3-tetrachloropropane and hydrogen fluoride. Background technique [0002] 3,3,3-Trifluoropropene, referred to as HFO-1243zf or TFP, has an ozone depletion value (ODP) of 0 and a greenhouse effect potential (GWP) of only 0.29, which can be used as a synthetic and environmentally friendly refrigerant2,3,3,3 - The basic raw material of tetrafluoropropene (HFO-1234yf), which can also be used to prepare mixed refrigerants to replace R22, R134a and R410A, and can also be used as a monomer to synthesize polymer materials such as fluorosilicone rubber and fluorosilicone oil. [0003] So far, among the many known synthesis methods of HFO-1243zf, the one-step gas-phase fluorination synthesis using 1,1,1,3-tetrachloropropane and anhydrous hydrogen fluoride as raw materials has...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/128B01J27/138B01J27/125B01J27/12B01J27/122B01J35/10B01J35/08C07C17/25C07C21/18B82Y30/00B82Y40/00
Inventor 毛伟吕剑贾兆华白彦波秦越韩升王博郝志军石磊
Owner XIAN MODERN CHEM RES INST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com