In-line blending process

A technology of blending and copolymer, applied in separation methods, chemical instruments and methods, evaporator regulation/control, etc., can solve problems such as low polymer concentration

Active Publication Date: 2018-08-31
BOREALIS AG
View PDF16 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods have the disadvantage that the polymer concentration in the polymer-rich li

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
  • In-line blending process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0158] Computer simulations were performed using Aspen 8.8 computer software. In this simulation, the solution taken from the reaction stage in Example E1 containing 21.2 wt % of a copolymer of ethylene and 1-octene, 0.9 wt% unreacted ethylene monomer and 77.9 wt% n-hexane solvent and unreacted 1-octene comonomer. From this, the temperature of the solution stream is assumed to be 220°C before entering the flash separator, the pressure is assumed to be 90 bar before entering the flash separator, and 9 bar in the flash separator. In Comparative Example CE2, the separation was performed in a liquid-liquid separator. From this, it is assumed that the temperature of the solution stream before entering the liquid-liquid separator is 220°C, and the pressure in the liquid-liquid separator is assumed to be 30-45 bar. A comparison of process flows is shown in Table 1.

[0159] Table 1

[0160]

[0161] By comparison, it can be seen that flash separation is more efficient t...

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

An in-line blending process for polymers comprising: (a) providing two or more reactor-low pressure separator units (1, 7) in parallel configuration, each reactor-low pressure separator unit comprising one reactor (2, 8) fluidly connected to one low pressure separator (3, 9) downstream and further a recycling line (5, 11) connecting the low pressure separator (3, 9) back to the corresponding reactor (2, 8); (b) polymerizing olefin monomers having two or more carbon atoms in each of the reactors (2, 8) in solution polymerisation; (c) forming an unreduced reactor effluents stream including a homogenous fluid phase polymer-monomer-solvent mixture in each of the reactors (2, 8), (d) passing the unreduced reactor effluents streams from each of the reactors (2, 8) through the corresponding low pressure separators (3, 9), whereby the temperature and pressure of the low pressure separators (3, 9) is adjusted such that a liquid phase and a vapour phase are obtained, whereby yielding a polymer-enriched liquid phase and a polymer-lean vapour phase, and (e) separating the polymer-lean vapour phase from the polymer-enriched liquid phase in each of the low-pressure separators (3, 9) to form separated polymer-lean vapour streams and separated polymer-enriched liquid streams; (f) combining the polymer-enriched liquid streams from step (e) in a further low-pressure separator and/or a mixer (13)to produce a combined polymer-enriched liquid stream (16); (g) reintroducing the polymer-lean vapour streams from step (e) via recycling lines (5, 11) into the corresponding reactors (2, 8).

Description

technical field [0001] The present invention relates to an in-line blending process of two reactors operating in a parallel configuration for the production of polymers. Background technique [0002] In traditional polymer production, reactors are operated in series. This operation allows the use of different process conditions and thus the properties of the polymer produced in a single reactor can be varied. Within certain limits it is possible, for example, to vary the molecular weight distribution of the total feed, ie the feed produced in all reactors. However, a separate polymerization of the polymer independent of the further steps is also desirable, since there are more possibilities for adjusting the microstructure when there is no need to take into account the second or third step. For example, if bimodal polyolefins are to be produced, the material transferred from one reactor to the other remains active, i.e. the remaining catalyst activity will determine the ch...

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): C08F2/00C08F2/06C08F6/00C08F6/12C08J11/02
CPCC08F2/06C08F6/003C08F6/12C08J11/02Y02P20/582C08F10/00C08L23/00C08F2/001C08F2/01B01D1/14C08F6/001C08F6/10B01D1/0082B01D1/0064C08F210/02C08F210/14
Inventor H·斯莱斯特M·阿尔·H·阿里J·拉萨宁S·西廷M·伯格斯特E·埃里克松C·沃尼茨G·玛蒂瓦南S·维贾伊V·卡尼洛普洛斯J·阿霍J·塔卡卡尔胡
Owner BOREALIS AG
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap