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

Butadiene Extraction Method

A technology for butadiene and butene, applied in the field of butadiene extraction, can solve the problems of low overall yield, reduced yield, high equipment fouling rate and the like

Active Publication Date: 2017-05-10
LUMMUS TECH INC
View PDF12 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First, the production of vinylcyclohexene (VCH, or butadiene dimer) increases with increasing temperature, with higher dimer production resulting in lower overall yields and possibly higher equipment fouling rate
Second, there are high C 4 Potential for Greater Risk from Alkyne Concentrations
However, limiting the vinyl acetylene concentration may lead to additional loss of 1,3-butadiene and thus lower yield

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
  • Butadiene Extraction Method
  • Butadiene Extraction Method
  • Butadiene Extraction Method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0048] According to the embodiments disclosed herein, with image 3 A similar butadiene recovery process is shown, with conventional butadiene recovery (utilizing screw-type or centrifugal compressors and cooling towers) and compressorless butadiene recovery (also involving cooling towers) utilizing the following conditions for comparison.

[0049] For the no-compressor design, the degassing tower is at 4.21kg / cm 2 Operate under the top pressure of the tower, slightly higher than the pressure of the extractive distillation system (main scrubber, rectifying column and post scrubber). Consequently, the degassing column operates at correspondingly higher temperatures: 148°C at the top and 193°C at the bottom.

[0050] For conventional methods, the degassing tower only has 0.7kg / cm 2 It operates at a higher overhead pressure and at much lower temperatures: 105°C top and 149°C bottom.

[0051] For this example, if image 3 The illustrated embodiment uses a straight-through co-...

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

A process for the recovery of 1,3-butadiene from a C4 fraction is disclosed, wherein the butadiene extraction process can be operated at medium pressure using a liquid ring type compressor. The use of a liquid ring compressor, along with the other process options presented in this article, can advantageously reduce capital and operating costs similar to the compressorless option, while mitigating the risks associated with the higher operating temperatures and pressures of the compressorless option . Thus, embodiments of the methods disclosed herein include the best features of conventional designs (low pressure, compressor present) and the advantages of compressorless designs (low capital and operating costs), as well as other advantages unique to the systems disclosed herein .

Description

technical field [0001] Embodiments disclosed herein relate to the recovery of butadiene from mixed hydrocarbon streams. More specifically, embodiments disclosed herein relate to an improved butadiene extraction process wherein the degasser is operated at medium pressure. Background technique [0002] Butadiene is an important basic chemical and is used, for example, for the preparation of synthetic rubbers (butadiene homopolymer, styrene-butadiene-rubber or nitrile rubber) or for the preparation of thermoplastic terpolymers (acrylonitrile- butadiene-styrene copolymer). Butadiene is also converted to sulfolane, chloroprene and 1,4-hexamethylenediamine (via 1,4-dichlorobutene and adiponitrile). Dimerization of butadiene also allows the production of vinylcyclohexene, which can be dehydrogenated to form styrene. [0003] Butadiene can be produced from saturated hydrocarbons by refining processes or by thermal cracking (steam cracking) processes, in which case naphtha is usua...

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): C07C7/08C07C11/167B01J19/24
CPCC07C7/08C07C11/167B01D3/143B01D3/40B01D19/0068
Inventor 凯文·约翰·施温特罗伯特·J·布鲁默
Owner LUMMUS TECH INC