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

Preparation method of alkyne-rich C4 fraction selective hydrogenation catalyst

An alkyne-rich carbon four fraction, selective hydrogenation technology, applied in catalyst activation/preparation, hydrogenation to hydrocarbons, hydrocarbons, etc., can solve problems such as cost increase, catalyst activity decrease, selectivity decrease, etc.

Pending Publication Date: 2022-04-12
PETROCHINA CO LTD
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reduction temperature of Ni often reaches about 450 ° C. At this temperature, the reduced Pd atoms are very easy to aggregate, which greatly reduces the activity of the catalyst. It is necessary to increase the content of active components to compensate for the loss of activity, but it will also increase the cost. selectivity decline

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
  • Preparation method of alkyne-rich C4 fraction selective hydrogenation catalyst
  • Preparation method of alkyne-rich C4 fraction selective hydrogenation catalyst
  • Preparation method of alkyne-rich C4 fraction selective hydrogenation catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Catalyst carrier preparation: commercially available bimodal pore distribution spherical alumina carrier with a diameter of 3mm is used. After calcination at 1100°C for 4 hours, the pore size distribution ranges are 20-45nm and 90-400nm respectively, and the specific surface area is 43m 2 / g, weigh the carrier 100g.

[0037] Catalyst preparation:

[0038] (1) Palladium chloride is prepared as an active component impregnation solution, and the pH is adjusted to 1.7, and then the carrier is added to the Pd salt solution, after impregnation and adsorption for 2 hours, dried at 100°C for 4 hours, and roasted at 550°C for 2 hours to obtain a semi-finished catalyst C1-A.

[0039] (2) Bismuth nitrate is completely dissolved into the impregnating solution, impregnated with equal volume, impregnated the semi-finished catalyst C1-A in the prepared solution, shaken evenly, precipitated for 0.5h, dried at 100°C for 2h, and roasted at 400°C for 6h to obtain Semi-finished catalyst ...

Embodiment 2

[0048] Catalyst carrier preparation: commercially available bimodal pore distribution spherical alumina carrier with a diameter of 3mm is used. After calcination at 1050°C for 4 hours, the pore size distribution ranges are 14-45nm and 85-350nm respectively, and the specific surface area is 60m 2 / g, weigh the carrier 100g.

[0049] Catalyst preparation:

[0050] (1) Dissolve nickel nitrate and copper nitrate in 80g of water, add 40g of n-pentane, 20g of cetyltrimethylammonium bromide, and 20g of n-hexanol to fully stir to form a microemulsion, and add the carrier to the prepared microemulsion After soaking for 0.5h, the remaining liquid was filtered off and washed with deionized water until neutral. Dry at 60°C for 6h and calcinate at 590°C for 2h to prepare semi-finished catalyst C2-A.

[0051] (2) Palladium chloride was dissolved in 80 g of water, 40 g of n-pentane, 20 g of cetyltrimethylammonium bromide, and 20 g of n-hexanol were added and fully stirred to form a microem...

Embodiment 3

[0060] Catalyst carrier preparation: commercially available bimodal pore distribution spherical alumina carrier with a diameter of 3-4mm is used. After calcination at 1120°C for 4 hours, the pore size distribution ranges are 30-45nm and 100-500nm respectively, and the specific surface area is 25m 2 / g, weigh the carrier 100g.

[0061] Catalyst preparation:

[0062] (1) nickel nitrate, copper nitrate are dissolved in 70g water, add 35g n-hexane, 17g tween80, 17g n-amyl alcohol and fully stir to form a microemulsion, add the carrier to the prepared microemulsion and soak for 2h, filter the remaining liquid, Wash with deionized water until neutral. Dry at 80°C for 5h, and calcinate at 500°C for 3h to prepare semi-finished catalyst C3-A.

[0063] (2) Palladium chloride is formulated into the active component impregnating solution, and the pH is adjusted to be 2.5, and the semi-finished catalyst C3-A prepared in step (1) is added in the salt solution of Pd, after impregnating and...

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
Diameteraaaaaaaaaa
Particle sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to View More

Abstract

According to the preparation method of the alkyne-rich C4 fraction selective hydrogenation catalyst, a carrier is aluminum oxide or mainly aluminum oxide, the alkyne-rich C4 fraction selective hydrogenation catalyst has a bimodal pore distribution structure, the pore diameter of small pores is 10-45 nm, and the pore diameter of large pores is 80-500 nm. The catalyst at least contains Pd, Bi, Ni and Cu, Ni, Cu and a small amount of Pd are loaded in a micro-emulsion mode, the particle size of the micro-emulsion is controlled to be larger than the maximum pore size of a carrier pore and smaller than the maximum pore size of a large pore, and the micro-emulsion is distributed in the 80-500nm large pore of the carrier. Bi and most of Pd are loaded by adopting a solution method, and Bi and most of Pd are distributed in 10-45nm pores of the carrier. In the step of loading Pd by the microemulsion method, after the step of loading Ni and Cu by the microemulsion method and after the step of loading Bi by the solution method and loading Pd by the solution method, the other loading sequence is not limited. The specific surface area of the catalyst is 30-80 m < 2 > / g. The catalyst prepared by the method provided by the invention can be used in the selective hydrogenation process of alkyne-rich C4 fractions, and has good hydrogenation performance and anti-coking performance.

Description

technical field [0001] The invention relates to a preparation method of a catalyst for selective hydrogenation of acetylene-rich carbon four fractions, in particular to a preparation method of a catalyst for selective hydrogenation of alkyne-rich carbon four fractions and recovering butene with excellent anti-coking performance. Background technique [0002] The cracked C4 fraction usually contains 40% to 60% butadiene by mass in the pyrolysis of hydrocarbons to produce ethylene. Butadiene is an important monomer in the synthetic rubber industry. The extraction of butadiene from the cracked C4 fraction usually adopts solvent extraction methods, such as acetonitrile method, N-methylpyrrolidone method and dimethylformamide method. Due to the high concentration of alkynes in the extracted C4 fraction, and there is no industrial use value at present, it can only be used for combustion treatment. However, because of the danger of decomposition and explosion of high-concentration ...

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): B01J23/89B01J37/02C07C5/09C07C11/167C07C7/167
Inventor 孙利民展学成胡晓丽马好文王斌何崇慧马培源梁顺琴李平智吕龙刚谢培思张宏伟
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