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

Propane dehydrogenation catalyst with Mg and/or Ti modified spherical mesoporous material as carrier as well as preparation method and application of propane dehydrogenation catalyst

A mesoporous material, propane dehydrogenation technology, applied in the field of propane dehydrogenation to propylene, can solve the problem of low propylene selectivity

Inactive Publication Date: 2021-01-15
CHINA PETROLEUM & CHEM CORP +1
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the defect that the selectivity of propylene is relatively low in the process of catalyzing propane dehydrogenation to propylene in the existing propane dehydrogenation catalyst, and provide a kind of method for preparing propane dehydrogenation catalyst and prepared by the method The carrier is the propane dehydrogenation catalyst of Mg and / or Ti modified spherical mesoporous material and the application of the aforementioned propane dehydrogenation catalyst in propane dehydrogenation to propylene, the method provided by the present invention is easy to operate, environment-friendly and low in cost, and by The propane dehydrogenation catalyst prepared by this method can obtain better propylene selectivity under the condition that the precious metal loading is very low

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
  • Propane dehydrogenation catalyst with Mg and/or Ti modified spherical mesoporous material as carrier as well as preparation method and application of propane dehydrogenation catalyst
  • Propane dehydrogenation catalyst with Mg and/or Ti modified spherical mesoporous material as carrier as well as preparation method and application of propane dehydrogenation catalyst
  • Propane dehydrogenation catalyst with Mg and/or Ti modified spherical mesoporous material as carrier as well as preparation method and application of propane dehydrogenation catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0049] According to a preferred embodiment of the present invention, the step (c) includes: in the presence of an inert gas, in a stirred reactor, add the electron donor solvent tetrahydrofuran (THF), and control the reactor temperature to 25- 40°C, quickly add magnesium chloride and titanium tetrachloride when the stirring is turned on, adjust the system temperature to 60-75°C and react at a constant temperature for 1-5 hours until the magnesium chloride and titanium tetrachloride are completely dissolved, and the mixture containing magnesium chloride and titanium tetrachloride is obtained. of organic solutions. The organic solution containing magnesium chloride and titanium tetrachloride as described above is mixed with the spherical mesoporous material obtained in step (b) to perform the first impregnation treatment, and the ratio between the components is controlled to be, relative to 1 mole of titanium, The magnesium element content is 0.5-50 moles, preferably 1-10 moles,...

Embodiment 1

[0080] This example is used to illustrate the propane dehydrogenation catalyst and its preparation method.

[0081] (1) Preparation of spherical mesoporous materials

[0082]Hexadecyltrimethylammonium bromide and tetraethyl orthosilicate are added to the ammonia solution with a concentration of 25% by weight, wherein the addition of ethyl orthosilicate is 1g, and ethyl orthosilicate, hexadecane The molar ratios of trimethylammonium bromide, ammonia in ammonia water and water are listed in Table 1, and stirred at 80°C for 24h, then the resulting solution was transferred to a polytetrafluoroethylene-lined reactor, at 90 ℃ for 24 hours, followed by filtration and washing with deionized water for 4 times until the pH of the solution was 7, and then suction filtration to obtain a filter cake of mesoporous material with a two-dimensional hexagonal pore structure. Then, the filter cake was calcined in a muffle furnace at 500° C. for 18 hours to remove the template agent to obtain th...

Embodiment 2-5

[0093] Change the preparation process of the spherical mesoporous material P1 in Example 1 and the amount of each raw material and the operating condition parameters in the preparation process of the propane dehydrogenation catalyst, and carry out Examples 2-5 to obtain spherical mesoporous materials P2~P5, Mg and Ti-modified spherical mesoporous material supports C2-C5, and propane dehydrogenation catalysts Cat-2-Cat-5. Cat-2 to Cat-5 were respectively used to catalyze the reaction of propane dehydrogenation to propylene according to the method of Example 1.

[0094] Table 1 lists the dosage of each component, operating condition parameters and pore structure parameters of the spherical mesoporous materials P2-P5 in the preparation process of the spherical mesoporous materials P2-P5.

[0095] Table 2 lists the preparation process parameters of Mg and Ti modified spherical mesoporous material carriers (including the type and amount of precursors of magnesium and titanium compo...

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
particle sizeaaaaaaaaaa
pore sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to the field of catalysts, and discloses a propane dehydrogenation catalyst with a Mg and / or Ti modified spherical mesoporous material as a carrier as well as a preparation method and application of the propane dehydrogenation catalyst. The method for preparing the propane dehydrogenation catalyst comprises the following steps: (a) preparing a mesoporous material filter cake;(b) sequentially carrying out calcination, thermal activation treatment and ball milling treatment on the mesoporous material filter cake to obtain a spherical mesoporous material; (c) carrying out primary dipping treatment on the spherical mesoporous material in a solution containing an Mg component precursor and / or a Ti component precursor, and then carrying out spray drying to obtain an Mg and / or Ti modified spherical mesoporous material carrier; and (d) carrying out secondary dipping treatment on the modified spherical mesoporous material carrier in a solution containing a Pt component precursor, a Sn component precursor and a Na component precursor, and then sequentially carrying out solvent removal treatment, drying and roasting. When the obtained propane dehydrogenation catalyst catalyzes propane dehydrogenation to prepare propylene, high propylene selectivity can be obtained.

Description

technical field [0001] The invention relates to the field of propane dehydrogenation to propylene, in particular to a method for preparing a propane dehydrogenation catalyst whose carrier is a spherical mesoporous material modified by Mg and / or Ti and the carrier prepared by the method is Mg and / or Ti A propane dehydrogenation catalyst of a modified spherical mesoporous material and the application of the aforementioned propane dehydrogenation catalyst in propane dehydrogenation to propylene. Background technique [0002] Propylene is an important organic petrochemical basic raw material next to ethylene, and propane dehydrogenation to propylene has become one of the important ways to increase the source of propylene. Propane dehydrogenation technology is mainly divided into direct dehydrogenation and oxidative dehydrogenation, among which direct dehydrogenation technology has been industrialized in the 1990s. The industrially used propane direct dehydrogenation catalysts a...

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 Applications(China)
IPC IPC(8): B01J23/62B01J35/10B01J35/02B01J35/08B01J37/00C07C11/06C07C5/333
CPCB01J23/626B01J37/0045C07C5/3337B01J35/394B01J35/51B01J35/618B01J35/40B01J35/617B01J35/635B01J35/647C07C11/06Y02P20/52
Inventor 亢宇刘红梅刘东兵薛琳吕新平
Owner CHINA PETROLEUM & CHEM CORP
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