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

Method for preparing ethylbenzene by utilizing light alkanes

A technology for low-carbon alkanes and ethylbenzene, which is applied in the field of preparing ethylbenzene, can solve the problems of difficulty in ethylene transportation, improve the entry threshold of the ethylbenzene market, etc., and achieve the effects of flexible device design scale, compact production space design, and efficient utilization.

Inactive Publication Date: 2017-12-15
北京和利凯石化技术有限公司 +2
View PDF8 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In addition, the high-purity ethylene method needs to use high-purity ethylene and benzene to react to produce ethylbenzene, because high-purity ethylene can only come from ethylene plants, but the transportation of ethylene is extremely difficult; so ethylbenzene plants using this process generally rely on corresponding Ethylene plants, which virtually raise the entry threshold of the ethylbenzene market

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 ethylbenzene by utilizing light alkanes
  • Method for preparing ethylbenzene by utilizing light alkanes
  • Method for preparing ethylbenzene by utilizing light alkanes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Using the low-value product saturated liquefied gas LPG in the refinery as raw material to produce 100,000 tons / year of ethylbenzene.

[0046] The composition of the raw materials used in this embodiment is shown in Table 1 below:

[0047] Table 1

[0048] composition

[0049] The raw material consumption of present embodiment is as shown in table 2 below:

[0050] Table 2

[0051] raw material

[0052] The main processing conditions of the present embodiment are shown in table 3 below:

[0053] table 3

[0054]

[0055] The technology that present embodiment produces ethylbenzene is as follows:

[0056] (1) cracking unit:

[0057] The normal temperature saturated liquefied gas with a pressure of about 1.5MPa (in the continuous production process, the saturated liquefied gas can be combined with the circulating propane produced in the subsequent steps) is preheated by quenching water and then enters the vaporizer, and is fully vaporized befor...

Embodiment 2

[0088] In this embodiment, n-butane is selected as raw material to produce 300,000 tons / year of ethylbenzene. For the process of this embodiment, refer to Embodiment 1, and details are not repeated here.

[0089] The composition of the raw materials used in this embodiment is shown in Table 5:

[0090] table 5

[0091] composition

wt%

n-butane

100

total

100

[0092] The raw material consumption of this embodiment is shown in Table 6.

[0093] Table 6

[0094] raw material

KTA

kg / hr

n-butane

195

24392

benzene

219

27381

total

414

51772

[0095] The product distribution of this embodiment is shown in Table 7.

[0096] Table 7

[0097] product

KTA

kg / hr

fuel gas

58

7227

Propylene

36

4442

mixed carbon tetraolefins

11

1323

of which butadiene

7

866

pyrolysis gasoline

6

768

Ethylbenzene

300...

Embodiment 3

[0104] In this embodiment, ethane is selected as a raw material to produce 600,000 tons / year of ethylbenzene. For the process of this embodiment, refer to Embodiment 1, and details are not repeated here.

[0105] The composition of raw materials in this example is shown in Table 9.

[0106] Table 9

[0107] composition

wt%

methane

1.26

ethane

93.77

propane

4.97

total

100

[0108] See Table 10 for the consumption of raw materials in this embodiment.

[0109] Table 10

[0110] raw material

KTA

kg / hr

ethane

311

38860

benzene

448

55946

total

758

94806

[0111] The product distribution of this embodiment is shown in Table 11.

[0112] Table 11

[0113]

[0114] Propane / butane recycle, and recovery of benzene from pyrolysis gasoline are considered in Table 11.

[0115] The main process conditions of this embodiment are shown in Table 12.

[0116] Table 12...

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 provides a method for preparing ethylbenzene by utilizing light alkanes. The method comprises the following steps: (1) mixing a material flow containing light alkanes and steam to be fed into a cracking plant for carrying out a cracking reaction, thereby obtaining olefin-enriched cracking gas; (2) feeding the cracking gas into an alkaline wash device to remove acid gas therein so as to obtain the purified cracking gas; (3) feeding the purified cracking gas into a cracking gas separation unit, and separating ethylene-enriched gas in the cracking gas separation unit; (4) feeding the ethylene-enriched gas into an acetylene conversion reaction device to remove alkyne therein; and (5) feeding benzene and the ethylene-enriched gas in which the alkyne is removed into a hydrocarbylation reaction device for carrying out a hydrocarbylation reaction, feeding the hydrocarbylation reaction product into an ethylbenzene separation unit, and separating the ethylbenzene in the ethylbenzene separation unit. According to the method for preparing ethylbenzene by utilizing light alkanes provided by the invention, the utilization pathway of the light alkanes is effectively expanded, and an ethylbenzene production pathway independent of an ethylene plant / oil refinery is developed.

Description

technical field [0001] The invention relates to a method for preparing ethylbenzene by using low-carbon alkanes through cracking, alkylation and other means. Background technique [0002] Low-carbon alkanes mainly come from by-products of refinery processing, oilfield liquefied gas, imported liquefied gas and ethane, etc., and its main components include ethane, propane, isobutane and n-butane. [0003] At present, in the refinery, there are mainly the following methods for the industrial utilization of low-carbon alkanes: one is to use the ethane in it as fuel gas; the other is to sell the propane and butane in it as low-value liquefied gas. There are also a few refineries that separate low-carbon alkanes and use the separated pure components separately. The main utilization method is: dehydrogenate the separated pure components to produce corresponding olefins, such as propane dehydrogenation to propylene, isobutane dehydrogenation to isobutene, or the two are mixed and d...

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 Applications(China)
IPC IPC(8): C07C15/073C07C15/02C07C2/74C07C4/04C07C5/327C07C11/04C07C11/06C10G70/04C10G5/00
CPCC07C2/74C07C4/04C07C5/327C10G5/00C10G70/04C10G2400/02C07C11/04C07C11/06C07C15/073C07C15/02
Inventor 杜喜研路磊陈福存朱向学朱曾坤曾蓬徐龙伢金月昶张银龙王延晟昝大鑫谢素娟金熙俊刘盛林
Owner 北京和利凯石化技术有限公司
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