Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for production of ethylene through selective hydrogenation of acetylene

A technology for selective hydrogenation and acetylene, applied in the production of bulk chemicals, hydrogenation to hydrocarbons, organic chemistry, etc., can solve the problems of complex procedures, low ethylene selectivity, easy deactivation of catalysts, etc., to simplify procedures and improve selectivity. , to avoid the effect of flying temperature

Active Publication Date: 2017-05-03
CHINA PETROLEUM & CHEM CORP +1
View PDF9 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the disadvantages of low ethylene selectivity, easy deactivation of the catalyst and complicated process in the existing method of selective hydrogenation of acetylene to produce ethylene, the present invention provides a new method of selective hydrogenation of acetylene to produce ethylene

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 production of ethylene through selective hydrogenation of acetylene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A single-stage adiabatic fixed-bed reactor is used, wherein 50 mL of palladium-silver selective hydrogenation catalyst (the carrier is alumina, and the metal component content is: palladium 0.3% by weight, silver 0.1% by weight) is filled, and the acetylene molar content of acetylene is 5.24%. -The hexane solution enters the reactor to contact with the catalyst after hydrogenation, and the reaction conditions include: the liquid volume space velocity is 40h -1 , the molar ratio of hydrogen to acetylene at the reactor inlet is 1.30, the reactor inlet temperature is 36° C., and the pressure is 0.82 MPa. After reacting for 4 hours, samples were taken from the outlet of the single-stage adiabatic fixed-bed reactor and analyzed by a gas chromatograph. The acetylene conversion rate was 92.75%, and the ethylene selectivity was 91.31%. After 200 hours of reaction, samples were taken from the outlet of the single-stage adiabatic fixed-bed reactor and analyzed by a gas chromatogr...

Embodiment 2

[0046] A double-stage adiabatic fixed-bed reactor is used, such as figure 1 As shown, the first-stage reactor I and the second-stage reactor II are filled with 50mL palladium-silver selective hydrogenation catalyst (the carrier is alumina, and the metal component content is: palladium 0.3% by weight, silver 0.1% by weight), and the acetylene molar content is 9.21% acetylene-hexane solution ( figure 1 The middle stream A) enters the first-stage reactor I to contact with the catalyst after hydrogenation, and the outlet stream of the first-stage reactor I is cooled by the cooler III and then enters the second-stage reactor II to contact the catalyst after hydrogenation. The reaction conditions of the first-stage reactor Including: liquid volume space velocity of 80h -1 , the molar ratio of hydrogen to acetylene at the reactor inlet is 0.7, the reactor inlet temperature is 38°C, and the pressure is 0.82MPa. The reaction conditions of the second-stage reactor II include: the liqui...

Embodiment 3

[0048] A single-stage adiabatic fixed-bed reactor is used, wherein 50 mL of palladium-silver selective hydrogenation catalyst is filled (the carrier is alumina, and the metal component content is: 0.3% by weight of palladium, 0.3% by weight of silver, and 0.26% by weight of sodium), and the reaction raw material is acetylene And the mixture of C4 raffinate produced by butadiene plant, its specific composition is: 3.27mol% of acetylene, 10.66mol% of n-butane, 4.53mol% of isobutane, 24.84mol% of 1-butene, 2-butane ene 14.33mol%, isobutene 42.07mol%, 1,3-butadiene <30μg / g, carbon five 0.3mol%.

[0049] The acetylene-C4 raffinate solution with an acetylene molar content of 3.27% is mixed with hydrogen and then enters the reactor to contact with the catalyst for reaction. The reaction conditions include: the liquid volume space velocity is 100h -1 , the molar ratio of hydrogen to acetylene at the reactor inlet is 1.33, the reactor inlet temperature is 42° C., and the pressure is 1....

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

No PUM Login to View More

Abstract

The invention relates to a method for production of ethylene through selective hydrogenation of acetylene, wherein the method includes the steps: allowing acetylene dissolved in a solvent to enter a selective hydrogenation reactor in a liquid state, under a condition of selective hydrogenation, making acetylene contact with hydrogen gas and an acetylene selective hydrogenation catalyst, carrying out selective hydrogenation of acetylene, and converting into ethylene, wherein the solvent contains one or more of C4-C9 alkane, C4-C9 monoolefin, C4-C9 cycloolefin and C6-C8 aromatic hydrocarbons. The method for production of ethylene through selective hydrogenation of acetylene can effectively improve the selectivity of the catalyst and prolongs the service life of the catalyst while ensuring the acetylene conversion rate.

Description

technical field [0001] The invention relates to a method for selectively hydrogenating acetylene to produce ethylene. Background technique [0002] Ethylene is one of the most important basic raw materials in petrochemical industry, mainly produced by steam cracking of petroleum hydrocarbons. The cracked gas produced by the cracking unit is a mixture composed of hydrogen, methane, C2 fraction, C3 fraction, C4 fraction, C5 fraction and pyrolysis gasoline. The cracked gas contains 0.1%-0.5% (mole) of acetylene, which is harmful to subsequent reactions such as polymerization. Therefore, in the ethylene production process, a selective catalytic hydrogenation method is usually used to remove the alkyne concentration to Very low levels (mole fraction <1×10 -6 ) to meet the requirements of polymerization raw materials; at the same time, it can also increase the output of ethylene and improve the utilization rate of resources. [0003] The acetylene chemical industry used to o...

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): C07C5/09C07C11/04
CPCY02P20/52
Inventor 乐毅易水生王育彭晖
Owner CHINA PETROLEUM & CHEM CORP
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com