Low density ethylene-based polymer compositions with high melt strength and mid-high density control
US-9828496-B2 · Nov 28, 2017 · US
Process to control output and quality of ethylene-based polymer formed by high pressure free radical polymerization
US10273318B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10273318-B2 |
| Application number | US-201515527853-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 18, 2015 |
| Priority date | Dec 30, 2014 |
| Publication date | Apr 30, 2019 |
| Grant date | Apr 30, 2019 |
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- Title
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Abstract
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The invention provides a process to prepare an ethylene-based polymer, said process comprising polymerizing ethylene in the presence of at least one initiator system selected from the following: a) class 1 initiator system, b) class 2 initiator system, c) class 3 initiator system, or d) a combination thereof; and at a inlet pressure (P2) greater than, or equal to, 1000 Bar (100 MPa); and in a reactor system comprising at least one hyper compressor and a reactor configuration comprising at least one reactor, which comprises at least one reaction zone; and wherein the inlet pressure (P2) is reduced by at least 200 Bar, as compared to a similar polymerization, in the same reactor system, except it is operated at a higher inlet pressure (P1), and at a different hyper compressor throughput, and at a different maximum temperature for at least one reaction zone, and optionally, at a different amount of CTA system fed to the reactor configuration; and wherein, for the process, the “Ratio of total reactor consumption of the highest temperature class initiator system(s) (Y)” meets the following Equation D: 0.95*x^((P1−P2)/10 MPa)<Y<1.04*z^((P1−P2)/10 MPa) (Eqn. D), wherein x is greater than, or equal to, 0.97; and wherein z is less than, or equal to, 1.03. The invention also provides a process to prepare an ethylene-based polymer, said process comprising polymerizing ethylene in the presence of at least one initiator system selected from the following: a) a class 1 initiator system, b) a class 2 initiator system, c) a class 3 initiator system, or d) a combination thereof; and at an inlet pressure (P2) greater than, or equal to, 1000 Bar (100 MPa); and in a reactor system comprising a reactor configuration comprising at least one reactor, which comprises at least one reaction zone; and wherein the inlet pressure (P2) is reduced by at least 200 Bar, as compared to a similar polymerization, in the same reactor configuration, except it is operated at a higher inlet pressure (P1), and at a different maximum temperature for at least one reaction zone, and optionally, at a different amount of CTA system fed to the reactor configuration; and wherein, for the process, the “Ratio of total reactor consumption of the highest temperature class initiator system(s) (Y)” meets the following Equation D: 0.95*x^((P1−P2)/10 MPa)<Y<1.04*z^((P1−P2)/10 MPa) (Eqn. D), wherein x is greater than, or equal to, 0.97; and wherein z is less than, or equal to, 1.03.
First claim
Opening claim text (preview).
The invention claimed is: 1. A process to prepare an ethylene-based polymer, said process comprising polymerizing ethylene in the presence of at least one initiator system selected from the following: a) class 1 initiator system, b) class 2 initiator system, c) class 3 initiator system, or d) a combination thereof; and at an inlet pressure (P 2 ) greater than, or equal to, 1000 Bar (100 MPa); and in a reactor system comprising at least one hyper compressor and a reactor configuration comprising at least one reactor, which comprises at least one reaction zone; and wherein the inlet pressure (P 2 ) is reduced by at least 200 Bar, as compared to a similar polymerization, in the same reactor system, except it (similar polymerization) is operated at a higher inlet pressure (P i ), and at a different hyper compressor throughput, and at a different maximum temperature for at least one reaction zone, and optionally, at a different amount of CTA system fed to the reactor configuration; and wherein, for the process, the “Ratio of total reactor consumption of the highest temperature class initiator system(s) (Y)” meets the following Equation D: 0.95 * x ( P 1 - P 2 ) 10 MPa < Y < 1.04 * z ( P 1 - P 2 ) 10 MPa , ( Eqn . D ) wherein x is greater than, or equal to, 0.97; and wherein z is less than, or equal to, 1.03. 2. A process to prepare an ethylene-based polymer, said process comprising polymerizing ethylene in the presence of at least one initiator system selected from the following: a) a class 1 initiator system, b) a class 2 initiator system, c) a class 3 initiator system, or d) a combination thereof; and at an inlet pressure (P 2 ) greater than, or equal to, 1000 Bar (100 MPa); and in a reactor system comprising a reactor configuration comprising at least one reactor, which comprises at least one reaction zone; and wherein the inlet pressure (P 2 ) is reduced by at least 200 Bar, as compared to a similar polymerization, in the same reactor configuration, except it is operated at a higher inlet pressure (P 1 ), and at a different maximum temperature for at least one reaction zone, and optionally, at a different amount of CTA system fed to the reactor configuration; and wherein, for the process, the “Ratio of total reactor consumption of the highest temperature class initiator system(s) (Y)” meets the following Equation D: 0.95 * x ( P 1 - P 2 ) 10 MPa < Y < 1.04 * z ( P
Assignees
Inventors
Classifications
- C08F10/02Primary
Ethene · CPC title
Polymerisation in gaseous state · CPC title
Recycling of unreacted starting or intermediate materials · CPC title
- C08F2/01Primary
characterised by special features of the polymerisation apparatus used · CPC title
Polymerisation in the presence of compounding ingredients, e.g. plasticisers, dyestuffs, fillers · CPC title
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- What does patent US10273318B2 cover?
- The invention provides a process to prepare an ethylene-based polymer, said process comprising polymerizing ethylene in the presence of at least one initiator system selected from the following: a) class 1 initiator system, b) class 2 initiator system, c) class 3 initiator system, or d) a combination thereof; and at a inlet pressure (P2) greater than, or equal to, 1000 Bar (100 MPa); and in a r…
- Who is the assignee on this patent?
- Dow Global Technologies Llc, Dow Brasil Sudeste Ind Ltda
- What technology area does this patent fall under?
- Primary CPC classification C08F10/02. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Apr 30 2019 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 6 related publications on this page (citations in our corpus or others sharing the same primary CPC).