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

Method for preparing low-carbon olefin from synthesis gas

A low-carbon olefin and synthesis gas technology, which is applied in the field of co-production of gasoline and synthesis gas to produce low-carbon olefins, can solve the problems of large energy consumption, low selectivity of low-carbon olefins, low catalyst activity, etc., and achieve high conversion rate and methane The effect of low selectivity and simple separation process

Pending Publication Date: 2020-05-29
大连凯信科技研发有限公司
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are problems of low selectivity of low-carbon olefins and low catalyst activity, and in the secondary reactor, the catalytic cracking reaction of high-carbon olefins is realized with hydrogen and carbon monoxide as the main raw materials, which results in large energy consumption

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 low-carbon olefin from synthesis gas
  • Method for preparing low-carbon olefin from synthesis gas
  • Method for preparing low-carbon olefin from synthesis gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] use as figure 1 The process described in the example verification process uses a fluidized bed reactor for the high-temperature Fischer-Tropsch reaction process, and a fixed-bed reactor for the catalytic cracking reaction process.

[0054] High temperature Fischer-Tropsch reaction conditions: H 2 / CO=1 / 1 (molar ratio, the same below), reaction temperature 340°C, reaction pressure 2MPa, catalyst load (reaction actual volume space velocity) 8000h -1 , 80% carbon monoxide, hydrogen recycle stream ( figure 1 The middle stream 7) is circulated back to the high temperature Fischer-Tropsch reaction zone.

[0055] High temperature Fischer-Tropsch uses Fe catalyst 100 Zn 35 Cr 15 Mg 60 Al 120 Na 3 o x .

[0056] Catalytic cracking reaction conditions: reaction temperature 500°C, reaction pressure, 0.1MPa, catalyst load (reaction actual mass space velocity) 20h -1 , 80% of the recycle stream of aromatics-rich oil with carbon five or more is recycled back to the catalyt...

Embodiment 2

[0062] use as figure 1 The process described in the example verification process uses a fluidized bed reactor for the high-temperature Fischer-Tropsch reaction process, and a fixed-bed reactor for the catalytic cracking reaction process.

[0063] High temperature Fischer-Tropsch reaction conditions: H 2 / CO=1.5 / 1, reaction temperature 320°C, reaction pressure 1.5MPa, catalyst load (reaction actual volume space velocity) 4000h -1 , 90% of the carbon monoxide and hydrogen circulating streams are recycled back to the high-temperature Fischer-Tropsch reaction zone.

[0064] High temperature Fischer-Tropsch uses Fe catalyst 100 Zn 50 Cr 12 Mg 30 Al 90 Na 8 o x .

[0065] Catalytic cracking reaction conditions: reaction temperature 600°C, reaction pressure, 0.5MPa, catalyst load (reaction actual mass space velocity) 30h -1 , 90% of the recycle stream of aromatics-rich oil with carbon five or more is recycled back to the catalytic cracking reaction zone.

[0066] Catalytic...

Embodiment 3

[0071] use as figure 1 The process described in the example verification process uses a fluidized bed reactor for the high-temperature Fischer-Tropsch reaction process, and a fixed-bed reactor for the catalytic cracking reaction process.

[0072] High temperature Fischer-Tropsch reaction conditions: H 2 / CO=1.5 / 1, reaction temperature 350°C, reaction pressure 2.5MPa, catalyst load (reaction actual volume space velocity) 20000h -1 , 100% carbon monoxide and hydrogen recycle streams are recycled back to the high temperature Fischer-Tropsch reaction zone.

[0073] High temperature Fischer-Tropsch uses Fe catalyst 100 mn 75 Cr 15 Mg 60 Al 120 K 3 o x .

[0074] Catalytic cracking reaction conditions: reaction temperature 550°C, reaction pressure, 0.3MPa, catalyst load (reaction actual mass space velocity) 30h -1 , 100% of the recycle stream of rich aromatics oil with carbon five or more is recycled back to the catalytic cracking reaction zone.

[0075] Catalytic crackin...

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 discloses a method for preparing olefin from synthesis gas. The method comprises the following steps: (1) reacting the synthesis gas through a catalyst by a high-temperature Fischer-Tropsch method to obtain an olefin-containing material flow; (2) condensing the olefin-containing material flow in the step (1), and carrying out gas-liquid separation to obtain a high-carbon olefin-containing material flow and a low-carbon olefin-containing material flow; (3) removing CO2, CO and H2 from the low-carbon olefin-containing material flow in the step (2) through decarburization and dehydrogenation treatment to obtain low-carbon olefin, and enabling the removed CO and H2 to flow back to the high-temperature Fischer-Tropsch reaction; (4) carrying out catalytic cracking reaction on the high-carbon olefin-containing material flow obtained in the step (2) through a catalyst to obtain a low-carbon olefin material flow and an aromatic hydrocarbon-containing material flow; and (5) carrying out olefin separation on the low-carbon olefin material flows in the step (3) and the step (4) to obtain low-carbon olefin. According to the method, the CO conversion rate reaches 90% or above, thelow-carbon olefin selectivity reaches 50% or above and can reach 75%, and 10-20% high aromatic hydrocarbon gasoline can be obtained.

Description

technical field [0001] The invention relates to a method for producing olefins from synthesis gas, in particular to a method for producing low-carbon olefins from synthesis gas, which can also co-produce gasoline. Background technique [0002] Low-carbon olefins such as ethylene, propylene, and butene are important basic chemical raw materials and occupy an important position in the national economy. These low-carbon olefins are the basic raw materials for various chemical products such as synthetic plastics and fibers. At present, the industrial production method of olefins is mainly based on petroleum-based derivatives as raw materials, such as steam cracking of naphtha to produce light olefins. [0003] In recent years, with the increasing scarcity of my country's oil resources and the continuous growth of oil demand, my country's dependence on foreign crude oil has continued to increase. Different from crude oil, my country's coal resources are very rich, and the synthe...

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): C07C11/04C07C11/06C07C11/08C07C1/04C07C4/06C07C7/00C10L1/04
CPCC07C1/048C07C1/044C07C4/06C07C7/00C10L1/04C07C2523/86C07C2523/889C07C11/04C07C11/06C07C11/08Y02P20/52Y02P30/20Y02P30/40
Inventor 周军成刘家旭王甦
Owner 大连凯信科技研发有限公司
Features
  • Generate Ideas
  • 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