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

A method for selective hydrogenation of carbon 2 in a sequential separation process

A technology of selective hydrogenation and sequential separation, applied in chemical instruments and methods, educts, hydrogenation to hydrocarbons, etc., can solve problems such as weak complexation, increased catalyst cost, and insufficient loading of active components

Active Publication Date: 2019-07-05
PETROCHINA CO LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using this patented method, the carrier adsorbs a specific polymer compound through the chemical adsorption of the hydroxyl group of alumina and the polymer, and the amount of the polymer compound adsorbed by the carrier will be limited by the number of hydroxyl groups of alumina; the functionalized polymer and Pd The complexation effect is not strong, and sometimes the loading capacity of the active components does not meet the requirements, and some active components remain in the impregnation solution, resulting in an increase in the cost of the catalyst; the preparation of carbon dioxide hydrogenation catalysts by this method also has the disadvantage of complicated process flow

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
  • A method for selective hydrogenation of carbon 2 in a sequential separation process
  • A method for selective hydrogenation of carbon 2 in a sequential separation process
  • A method for selective hydrogenation of carbon 2 in a sequential separation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Weigh Φ3.5, the specific surface area is 20.0m 2 / g, pore volume 0.31mL / g, bulk density 0.82g / ml spherical α-Al 2 o 3 Carrier 500g.

[0047] Dissolve 34.12g of 4,4-dihydroxy-2,2-bipyridine in 650mL ethanol solution, impregnate the above-mentioned carrier in the above-mentioned solution, and let the 4,4-dihydroxy-2,2-bipyridine completely After being loaded on the alumina support, it was dried at 60°C for 10 h to obtain the hydroxyl-bipyridine / Al 2 o 3 Prebody.

[0048] Weigh 0.37g Pd(NO 3 ) 2 , 0.79g AgNO 3 , dissolved in 600mL of deionized water, added 10ml of nitric acid and stirred until completely dissolved, adjusted the pH value to 3.5, and prepared a mixed solution. The above-mentioned hydroxyl-bipyridine / Al 2 o 3 The precursor was added to the prepared solution, stirred for 10 minutes, left to stand for 2 hours, and the residue was poured out to obtain PdAg-hydroxyl-bipyridine / Al 2 o 3 Precursor (number of moles of hydroxyl-bipyridine: (Pd+Ag)=30). A...

Embodiment 2

[0065] Weigh Φ4.0mm, height 4.0mm, specific surface area is 55.0m 2 / g, cylindrical θ-Al with a pore volume of 0.45ml / g and a bulk density of 0.68g / ml 2 o 3 Carrier 500g.

[0066] Dissolve 1.4g of 4,4-dihydroxy-2,2-bipyridine in 600mL ethanol solution, impregnate the above-mentioned carrier in the above-mentioned solution, and let the dihydroxy-2,2-bipyridine be completely loaded on the alumina after standing for 8 hours After being mounted on the carrier, dry at 90°C for 8 hours to obtain hydroxy-bipyridine / Al2 o 3 Prebody.

[0067] Weigh 0.73gPd(NO 3 ) 2 , 2.37gAgNO 3 , dissolved in 600mL deionized water, add 10ml nitric acid and stir until completely dissolved, adjust the pH to 2.5, and make a mixed solution. The above-mentioned hydroxyl-bipyridine / Al 2 o 3 Add the precursor to the prepared solution, stir for 60 minutes, let it stand for 8 hours, pour out the residual liquid, and dry the remaining solid at 110°C for 6 hours to obtain PdAg-hydroxy-bipyridine / Al 2 o...

Embodiment 3

[0087] Weighing Φ3.0mm, the specific surface area is 35.0m 2 / g, the pore volume is 0.20ml / g, the heap ratio is 0.75g / ml toothed spherical carrier 500g, wherein Al 2 o 3 460g, titanium oxide 40g, Al 2 o 3 It is a mixed crystal form of θ and α. Dissolve 71.07g of 6,6'-dihydroxy-3,3'-bipyridine in 650mL ethanol solution, impregnate the above carrier in the above solution, and let 6,6'-dihydroxy-3,3' -Bipyridine was completely loaded on the alumina support, and dried at 120°C for 4h to obtain hydroxy-bipyridine / Al 2 o 3 Prebody.

[0088] Weigh 0.40gPd(NO 3 ) 2 ,0.39gAgNO 3 , dissolved in 550mL deionized water, add 10ml nitric acid and stir until completely dissolved, adjust the pH value to 3, and make a mixed solution. The above-mentioned hydroxyl-bipyridine / Al 2 o 3 Add the precursor to the prepared solution, stir for 60 minutes, let stand for 12 hours, pour out the residue, and dry at 100°C for 8 hours to obtain PdAg-hydroxy-bipyridine / Al 2 o 3 Precursor (number o...

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
specific surface areaaaaaaaaaaa
Login to View More

Abstract

The invention relates to a C2 selective hydrogenation method in a sequential separation process. A fixed bed reactor for hydrogenation is arranged after a demethanizing column. A C2 material from a deethanizing column in an ethylene plant is subjected to pressurization and hydrogen addition and then is fed into an adiabatic bed reactor to perform the selective hydrogenation. The fixed bed reactor is filled with a Pd-Ag-series catalyst, which is prepared by combining an alumina carrier and a bipyridine derivative having a hydroxyl group, wherein a metal complex is formed from the hydroxyl bipyridine derivative combined on the carrier and active components. Through the method, activity and selectivity of the hydrogenation reaction are greatly improved than that in a conventional hydrogenation method. The method greatly increases the yield of ethylene and greatly reduces the generation of green oil, so that active centers of the catalyst are not covered by side products and the catalyst maintains the activity and selectivity well.

Description

technical field [0001] The invention relates to a selective hydrogenation method, in particular to a carbon-two selective hydrogenation method in a sequential separation process. 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 process and improve the economic benefits of the device. [0003] The cracked carbon distillate contains acetylene ...

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): C07C11/04C07C5/09B01J23/66
CPCY02P20/141Y02P20/52
Inventor 韩伟谭都平车春霞钱颖梁玉龙黄德华常晓昕景喜林王书峰谷丽芬程琳胡晓丽李晓银丛日新巩红光
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