Supercharge Your Innovation With Domain-Expert AI Agents!

Method for improving propylene recovery of fcc recovery unit

A technology for feeding propylene and hydrocarbons, which is applied in separation methods, chemical instruments and methods, absorption purification/separation, etc., and can solve problems such as uneconomical and difficult high recovery of propylene

Active Publication Date: 2021-08-17
UOP LLC
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the presence of light ends and propylene in unstabilized gasoline, high recovery of propylene becomes more difficult or uneconomical using traditional recovery methods

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 improving propylene recovery of fcc recovery unit
  • Method for improving propylene recovery of fcc recovery unit
  • Method for improving propylene recovery of fcc recovery unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The FCC unit is designed according to the prior art process flow. A propylene recovery of 98.93 mole % can be achieved. Any additional propylene recovery using conventional methods is impossible and uneconomical. By adding this new invention to the design of the unit, higher recovery rates can be achieved, resulting in higher yields and a payback period of several months based on the cost of the new equipment. A comparison of the base case vs. the case of adding new equipment is shown in Table 1.

[0038] Table 1

[0039]

[0040] As shown in Table 1 above, higher propylene recoveries can be achieved with the new invention and the payback period for new equipment investment is expected to be several months. Also, perform the above analysis for the worst case scenario of using LP steam to heat unstabilized gasoline. Unstabilized gasoline can be heated in most cases with waste heat process streams available from gas recovery or FCC main fractionation sections. Thi...

Embodiment 2

[0044] For existing installations and if the load on the wet gas compressor needs to be reduced due to capacity limitations, it can be done as figure 2 Use a split shell design for the flash tank as shown in . The benefit is to reduce the vapor entering the wet gas compressor while maintaining the same recovery in the gas concentration unit. The amount of propylene removed from the unstabilized gasoline was the same as with a single flash tank but the amount of vapor entering the wet gas compressor was lower as shown in Table 2 below.

[0045] Table 2

[0046] Unsteady gasoline flow, kg / h: 257,508

[0047]

[0048] As shown in the table above, when using split shell or dividing wall tanks, the flow rate to the wet gas compressor is reduced when removing nearly the same amount of propylene from unstabilized gasoline. Also, the overall flow to the wet gas compressor is at a slightly lower temperature.

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 subject matter generally relates to propylene recovery processes. More specifically, the subject matter relates to the enhancement of fuel gas generation from a fluid catalytic cracking (FCC) unit by minimizing light ends and propylene in lean unstabilized gasoline used as the primary absorber of an FCC gas enrichment unit A method for the recovery of propylene and liquefied petroleum gas (LPG) in the

Description

[0001] priority statement [0002] This application claims priority to US Application No. 62 / 268,041 filed December 16, 2015, the contents of which are hereby incorporated by reference in their entirety. technical field [0003] The subject matter generally relates to propylene recovery processes. More specifically, the subject matter relates to the enhancement of fuel gas generation from a fluid catalytic cracking (FCC) unit by minimizing light ends and propylene in lean, unstabilized gasoline used as the primary absorbent for an FCC gas enrichment unit A method for the recovery of propylene and liquefied petroleum gas (LPG) in the Background technique [0004] In the FCC unit, most of the propylene leaves the FCC fractionator overhead receiver in the gas phase, from where it is recovered in a downstream FCC gas enrichment facility. The liquid phase leaving the receiver carries significant amounts of propylene and light ends due to the mixing that occurs between the liqui...

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): C07C7/04C07C7/11C07C11/06
CPCB01D53/002C10G70/043C10G2300/104C10G2300/1044C10G2300/1088C10G2400/20B01D1/20B01D3/06C10G11/18C10G70/041C10G11/00B01D5/00C10L3/12C10L2290/06C10L2290/30C10L2290/543
Inventor J·A·卡菲什耶B·E·卡巴那
Owner UOP LLC
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