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

Method for preparing polymer grade ethylene through hydrogenation for removing acetylene

A technology of polymerization grade and ethylene, which is applied in the field of hydrogenation and alkyne removal to produce polymer grade ethylene, can solve the problems of unfavorable industrial application, harsh conditions and high reaction temperature, and achieves excellent anti-coking performance of catalyst, low ethylene loss rate and high reaction activity. Moderate effect

Active Publication Date: 2017-07-07
PETROCHINA CO LTD
View PDF16 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology is to prepare intermetallic compounds under high temperature conditions for selective hydrogenation of acetylene. The conversion rate of acetylene is low and the reaction temperature is high, which is not conducive to industrial application.
And the catalyst is prepared by hot melting method, the conditions are harsh
[0015] To sum up, the selective hydrogenation of low-carbon alkynes and dienes currently mainly uses noble metal catalysts, and a lot of work has been done on the research and development of non-noble metal catalysts, but there is still a long way to go before industrial applications

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
  • Method for preparing polymer grade ethylene through hydrogenation for removing acetylene
  • Method for preparing polymer grade ethylene through hydrogenation for removing acetylene
  • Method for preparing polymer grade ethylene through hydrogenation for removing acetylene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] Weigh 100ml of a clover-shaped α-alumina carrier of Φ4.5×4.5mm, and place it in a 1000ml beaker. Take ferric nitrate, dissolve it in 60ml of deionized water by heating, adjust the pH value to 2.5, impregnate the equal volume on the surface of the carrier, shake the carrier quickly for 6 minutes, let stand for 30 minutes until the adsorption balance, and completely seal the mouth of the beaker with plastic wrap , aged in a water bath at 60°C for 30 minutes, and then in an oven according to the procedure: Dry the catalyst, move the catalyst into an evaporating dish, and activate the catalyst in a muffle furnace using a temperature-programmed method. The activation procedure: Weigh an appropriate amount of nickel nitrate, impregnate according to the above preparation steps, and dry and activate. Then tetrabutyl titanate was removed, supported by the same method as above, and the catalyst was obtained after activation.

[0075] Evaluation method:

[0076] Before the ...

Embodiment 2

[0079] At 50°C, a certain amount of NaAlO 2 solution and ZrCl 4 The solution was stirred and mixed, then neutralized with nitric acid solution, stirred for 10 hours, and uniform Al-Zr particles were formed by co-precipitation. The resultant was filtered and the Na in it was washed with deionized water + and Cl - Ions, and then add polyvinyl alcohol with a mass concentration of 15% as a pore-forming agent, kneading and molding. Dry at 130°C for 2 hours, and calcined at 650°C for 4 hours to obtain a Zr-Al composite support, the mass ratio of alumina to zirconia in the support is 4:1.

[0080] Weigh 100ml of the composite carrier and place it in a 1000ml beaker. Take ferric nitrate and nickel nitrate, heat and dissolve in 100ml deionized water, adjust the pH value to 2.0, impregnate the solution at a temperature of 80°C, impregnate the excess on the carrier, shake the beaker for 10min, filter off the excess impregnating solution, and place the catalyst in a water bath at 60°C...

Embodiment 3

[0085] Weigh 100ml of a Φ1.5mm spherical α-alumina carrier. Dissolve ferric nitrate in 40ml of deionized water, adjust the pH value to 3.0, soak the liquid at 40°C, spray it on the carrier with a watering can, load it in the drum for 10 minutes to make the active components evenly loaded, and control the loading process in 6 minutes to complete, and then In the oven follow the procedure: Dry the catalyst, move the catalyst into an evaporating dish, and use the temperature program method to activate the catalyst in a muffle furnace. Obtain a catalyst dip.

[0086] Using the same method as the first step, nickel nitrate is taken, dissolved, sprayed and dipped onto the surface of the impregnated catalyst, then dried and roasted to obtain the final catalyst. Drying procedure:

[0087] Titanium tetrachloride was taken, loaded according to the same steps as above, and calcined to obtain a catalyst.

[0088] Before the catalyst is used, it is reduced with 20% hydrogen i...

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
Pore volumeaaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for preparing polymer grade ethylene through hydrogenation for removing acetylene. A Ti-Fe-Ni hydrogenation catalyst is used, and refined ethylene materials at the tower top of an ethylene rectifying column enter an adiabatic reactor to be subjected to selective hydrogenation so as to remove micro acetylene in the adiabatic reactor, wherein the hydrogenation catalyst is a Ti-Fe-Ni catalyst, a carrier is a high-temperature resistant inorganic oxide, based on 100% by mass of the catalyst, the catalyst contains 1-8% of Fe, 0.2-1.5% of Ti and 0.5-1.8% of Ni, the specific surface area of the catalyst is 10-200m<2> / g, the pore volume is 0.2-0.63ml / g, Fe is loaded on the carrier in a macerating manner and is prepared through roasting and hydrogen atmosphere reduction, and in the catalyst, the Fe mainly exists in the alpha-Fe2O3 shape and contains FeNi phases. The catalyst is mild in reaction activity, good in operating flexibility, low in loss rate of the ethylene and even zero in the loss of the ethylene, and lower in the generation quantity of acrylic acid oligomer than that using a noble metal catalyst.

Description

technical field [0001] The invention relates to a method for producing polymer grade ethylene by hydrogenation and removal of acetylene, in particular to a method for hydrogenating and converting trace amounts of acetylene contained in ethylene materials into ethylene with a Ti-Fe-Ni catalyst. Background technique [0002] The production of polymer grade ethylene is the leader of the petrochemical industry, and polymer grade ethylene and propylene are the most basic raw materials for downstream polymerization units. Among them, the selective hydrogenation of acetylene has an extremely important impact on the ethylene processing industry. In addition to ensuring that the acetylene content at the outlet of the hydrogenation reactor reaches the standard, the selectivity of the catalyst is excellent, which can make ethylene generate as little ethane as possible, which is beneficial to improving the entire process. It is of great significance to improve the ethylene yield of the ...

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): C07C5/09C07C7/167C07C11/04B01J23/755B01J37/02
CPCB01J23/755B01J37/0201C07C5/09C07C7/167C07C2523/755C07C11/04Y02P20/52
Inventor 张忠东常晓昕苟尕莲韩伟张峰车春霞梁玉龙钱颖谢培思马好文潘曦竹王斌
Owner PETROCHINA CO LTD
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