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

Hydrogenation catalyst with large specific surface and low acid amount, and application thereof

A catalyst and specific surface technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, organic chemistry, etc., can solve the problems of alumina carrier specific surface reduction, alumina crystal phase limitation, etc.

Active Publication Date: 2015-03-11
CHINA PETROLEUM & CHEM CORP +1
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The consequence of using a higher calcination temperature to reduce the acidity of the alumina support is that not only the specific surface of the alumina support is reduced, but also the crystal phase of the alumina is restricted.

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
  • Hydrogenation catalyst with large specific surface and low acid amount, and application thereof
  • Hydrogenation catalyst with large specific surface and low acid amount, and application thereof
  • Hydrogenation catalyst with large specific surface and low acid amount, and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Get 300g of pseudo-boehmite (produced by China Aluminum Shandong Branch) produced by carbonization, add 240g of aqueous solution (wherein containing 2wt% of phosphoric acid, 1wt% of nitric acid, 1.5wt% of lanthanum nitrate), 3.0g of Tianqing powder, and extrude Shaped into a clover, the size is 2.0~3.0mm. After the obtained precursor was calcined at 900°C for 3 hours, the specific surface of alumina obtained was 200m 2 / g. Put the above-mentioned alumina into a fixed-bed reactor, raise the temperature to 100°C, and then pass in nitrogen containing hexamethyldisilazane vapor for 3 hours, then pass in air and heat up to 450°C for 2 hours to obtain a Modified alumina.

[0047] Get above-mentioned aluminum oxide 100ml, be respectively 0.02%, 0.8% and 2.0% according to the mass percent of Pd, Ag and K, the balance is Al 2 o 3 The ratio of palladium nitrate, silver nitrate and potassium nitrate was prepared by equal-volume impregnation method, and Cat-1 was obtained after...

Embodiment 2

[0049] Get 150g of pseudo-boehmite (produced by Sinopec) produced by sulfuric acid method, add 150g dry rubber powder (produced by China Aluminum Shandong Branch) and mix evenly, add 260g of aqueous solution (wherein containing nitric acid 3wt%, zinc nitrate .5wt% ), Tianqing powder 5.0g, shaped into a toothed spherical shape with a size of 1.0-3.0mm. Calcining the obtained precursor at 1000°C for 3 hours resulted in a specific surface of alumina of 165m 2 / g.

[0050] Put 100ml of the above-mentioned alumina into a glass reactor, add 500ml of p-xylene solution containing 5wt% methyltriethoxysilane, start stirring and gradually raise the temperature to 150°C and keep it at a constant temperature for 3 hours, then the obtained carrier Filter and dry, and roast and decompose at 600°C for 3 hours to obtain modified alumina.

[0051] Get 50 grams of the above-mentioned modified alumina, according to the mass percentages of Pd, La and Ca, they are respectively 0.02%, 0.08% and 0....

Embodiment 3

[0053] Get 100g of commercial alumina spherical carrier (produced by Aluminum Corporation of China Shandong Branch, specific surface area 205m 2 / g), roasting and decomposing at 900°C for 3 hours, the specific surface area becomes 158cm 2 / g. It is subjected to silanization treatment, and the treatment conditions are consistent with Example 1.

[0054] The above-mentioned modified alumina is used for catalyst manufacture, and the mass percentages of Pd, Ag and Bi are 0.05%, 0.3% and 1.0% respectively, and the balance is prepared by configuring palladium nitrate, silver nitrate and bismuth nitrate according to the ratio of the carrier The aqueous solution is prepared by spraying, dried and calcined at 480°C to obtain a catalyst Cat-3. NH on the catalyst 3 -TPD analysis, the total acid content is 0.130 mmol / 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 surface areaaaaaaaaaaa
specific surface areaaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a palladium metal hydrogenation catalyst used in unsaturated hydrocarbon hydrogenation. The catalyst comprises a metal active component palladium, a carrier alumina and a silica auxiliary agent. The catalyst provided by the invention has a relatively large specific surface (a specific surface area is 140-330cm<2> / g), and relatively low surface acid content (lower than 0.15mmol / g). The content of the auxiliary agent silica is 0.5-10wt%. Silica is added into the catalyst through a gas-phase silylation treatment upon alumina. Preferably, the catalyst provided by the invention also comprises a plurality of auxiliary agents. When the catalyst provided by the invention is used in an unsaturated hydrocarbon hydrogenation reaction, the catalyst has the advantages of high activity and low yield of green oil and carbon deposit.

Description

technical field [0001] The invention relates to a hydrogenation catalyst and its application. More specifically, the invention relates to a palladium metal catalyst with special physical and chemical properties and its application in the field of unsaturated hydrocarbon hydrogenation. Background technique [0002] Monoolefins are important raw materials in industry, among which ethylene, propylene, butene and styrene are all important chemical intermediates. The current commercial production methods of olefins include steam cracking, catalytic cracking, thermal cracking, alcohol dehydration, methanol cracking reaction and syngas synthesis of olefins, among which steam cracking is the main way of monoolefin production. The ethylene, propylene, butene and other products produced in the above-mentioned industrial processes contain a small amount of alkynes or dienes. Since alkynes and dienes affect the subsequent polymerization effect and product quality, the removal of alkyne...

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): B01J23/66B01J23/68B01J35/10C07C11/04C07C1/06C07C11/08C07C11/10C07C15/46C07C7/167
CPCY02P20/52
Inventor 黄龙田保亮戴伟李宝芹乐毅杨溢张桂英唐国旗彭晖穆玮
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