Method for preparing SO4<2->/ZrO2-MxOy solid superacid catalyst and use

A solid super acid and catalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, isomerization hydrocarbon production, etc., can solve the problems of low selectivity and low activity of target products, and achieve good effect and selectivity. High, small grain effect

Inactive Publication Date: 2009-01-21
FUDAN UNIV
View PDF0 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In past studies, materials such as acid-washed layered clay, zeolite molecular sieve, and layered zirconium phosphate have been tried to catalyze the isomerization of α-pinene, but these catalysts have low activity

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

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018] Example 1: 26.223 grams of ZrOCl 2 ·8H 2 O and 1.856 g Al(NO 3 ) 3 9H 2 O was dissolved in 190mL of water, and concentrated ammonia water was added dropwise under stirring until the pH = 9-10, and aged at room temperature for 24 hours, and the aged sample was hydrothermally treated at 90°C for 24 hours, and the precipitate was filtered and washed until the filtrate was dry. Contains Cl - ions, the resulting filter cake was dried at 100°C for 24 hours, then soaked in 0.5mol / L dilute sulfuric acid for 1 hour, filtered, dried at 100°C for 24 hours, and then calcined at 650°C for 3 hours in an air atmosphere to obtain Catalyst-1. Surface is 133m 2 / g.

example 2

[0019] Example 2: 18.977 grams of ZrCl 4 and 1.856 grams of Al(NO 3 ) 3 9H 2 O was dissolved in 190mL of water, and concentrated ammonia water was added dropwise with stirring until the pH = 9-10, and aged at room temperature for 12 hours. The aged sample was hydrothermally treated at 90°C for 12 hours, and the precipitate was filtered and washed until the filtrate was free. Contains Cl - ions, the resulting filter cake was dried at 110°C for 12 hours, then soaked in 0.5mol / L dilute sulfuric acid for 0.5 hours, filtered, dried at 110°C for 12 hours, and then calcined at 650°C for 3 hours in an air atmosphere to obtain Catalyst-2. Surface is 128m 2 / g.

example 3

[0020] Example 3: 21.746 grams of ZrO (NO 3 ) 2 2H 2 O and 1.856 g Al(NO 3 ) 3 9H 2 O was dissolved in 190mL of water, and concentrated ammonia water was added dropwise under stirring until the pH = 9-10, and aged at room temperature for 36 hours. The aged sample was hydrothermally treated at 90°C for 36 hours, and the precipitate was filtered and washed until the filtrate was free. Contains Cl - ion, the resulting filter cake was dried at 80°C for 36 hours, then soaked in 1mol / L dilute sulfuric acid for 05 hours, filtered, dried at 80°C for 36 hours, and then calcined at 650°C for 3 hours in an air atmosphere to obtain Catalyst-3. 135m 2 / g.

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 surfaceaaaaaaaaaa
Specific surfaceaaaaaaaaaa
Login to view more

Abstract

The invention relates to a prepration method of a SO4<2->/ZrO2-MxOy solid superacid catalyst and the application thereof. The preparation method adopts the coprecipitation method for the preparation, thereby obtaining a precursor of a binary mixed hydroxide containing Zr and M (M is equal to Al or Fe), the precursor is carried out the hydrothermal treatment, dilute sulfuric acid is used for soaking, and the solid superacid catalyst with the larger specific surface area is obtained after the high-temperature calcination. The catalyst can obtain good effect, high conversion rate of Alpha-pinene and high selectivity of target products of camphene and limonene by being applied in the Alpha-pinene isomerization reaction.

Description

technical field [0001] The invention belongs to the technical field of catalysts, in particular to a SO 4 2- / ZrO 2 -M x o y Preparation method and application of solid superacid catalyst. Background technique [0002] Acid catalysis is a very important class of reactions. In recent years, with the improvement of environmental protection requirements, people are eager to replace the environmentally unfriendly catalysts used in some important industrial reactions, such as: HF, H 2 SO 4 、H 3 PO 4 and AlCl 3 etc. to achieve green production. SO 4 2- Promoted oxide-type solid superacids can activate C-C and C-H bonds at lower temperatures, and have the advantages of regenerability of heterogeneous catalysts and high activity and high selectivity of liquid superacids. A substitute for friendly catalysts, creating a batch of clean processes without environmental pollution. In this system, SO 4 2- / ZrO 2 is the most acidic and has been studied the most. There are ...

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
IPC IPC(8): B01J27/053C07C5/27
Inventor 赵杰华伟明乐英红翟德伟高滋
Owner FUDAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap