CN105920881A - Degassing method used during production of ethylene propylene rubber - Google Patents
Degassing method used during production of ethylene propylene rubber Download PDFInfo
- Publication number
- CN105920881A CN105920881A CN201610398222.2A CN201610398222A CN105920881A CN 105920881 A CN105920881 A CN 105920881A CN 201610398222 A CN201610398222 A CN 201610398222A CN 105920881 A CN105920881 A CN 105920881A
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- China
- Prior art keywords
- degassing
- tower
- heater
- polymer fluid
- heat
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/0068—General arrangements, e.g. flowsheets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F6/00—Post-polymerisation treatments
- C08F6/001—Removal of residual monomers by physical means
- C08F6/003—Removal of residual monomers by physical means from polymer solutions, suspensions, dispersions or emulsions without recovery of the polymer therefrom
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Degasification And Air Bubble Elimination (AREA)
Abstract
The invention provides a degassing method used during production of ethylene propylene rubber. The degassing method comprises the following steps: filtering polymer liquid discharged from a polymerizing kettle (D-1) by a filter so as to remove macromolecular polymers; heating the polymer liquid by a heater (E-2) so as to provide a part of heat for gas; degassing the polymer liquid heated by the heater (E-2) in a degassing tower (T-1) so as to extract unreacted monomers. By the degassing method, the mass transfer and heat transfer efficiency of a material is enhanced and blockage of the heater is avoided.
Description
Technical field
The present invention relates to a kind of degassing method, produce EP rubbers more particularly, to solution polymerization
In degassing method.
Background technology
Conventional solution method EP rubbers produce carry out in polymeric kettle, ethylene, propylene, Third monomer or
4th monomer is polymerized generation EP rubbers under catalyst action in polymer reactor.Polymer reactor
Containing EP rubbers, solvent, remainder catalyst, unreacted polymerization monomer (second in the logistics discharged
Alkene, propylene, Third monomer or the 4th monomer).Unreacted monomer needs to remove from product with circulation
Utilize.This polymer solution viscosity is higher, unfavorable to mass-and heat-transfer, and degassing heater easily blocks, and causes
Make degassing operation often stop cleaning equipment, be unfavorable for producing continuously.
Summary of the invention
In order to solve the problems of the prior art, it is an object of the invention to provide a kind of EP rubbers raw
Degassing method in product is to solve heat exchanger blockage problem, thus realizes producing continuously.The method includes:
By the polymer fluid discharged at the bottom of degassing tower (T-1) tower by filter to remove macromolecule polyalcohol；Pass through
Heater (E-2) carries out heating and thinks that air stripping provides a part of heat described polymer fluid；Add described in Jing
The polymer fluid that hot device (E-2) heats enters in degassing tower (T-1) and deaerates to propose unreacted monomer.
In above-mentioned degassing method, at the polymer fluid discharged by polymeric kettle (D-1) by filter to remove
Before going the step of macromolecule polyalcohol, also include: the polymer fluid discharged by described polymeric kettle (D-1)
Described degassing tower (T-1) degassing is entered after decompression.
In above-mentioned degassing method, by heater (E-1) heat external solvent, so that described outside
Solvent gas chemical conversion gaseous state also enters in described degassing tower (T-1) and thinks that air stripping provides another part heat.
In above-mentioned degassing method, polymer fluid is when described heater (E-2) heats, it is ensured that poly-
The flow velocity closing liquid is not less than 1m/s to prevent laminar flow from causing the overheated glutinous wall of material to reduce heat transfer efficiency.
In above-mentioned degassing method, the polymer fluid heated through described heater (E-2) is entering described taking off
Restricting element is added, to prevent the polymer fluid of heat from entering described degassing tower (T-1) before gas tower (T-1)
Before undergo phase transition and cause adding heat pipe and conveyance conduit blocking.
In above-mentioned degassing method, the described external solvent of gasification enters in described degassing tower (T-1),
Gaseous solvent air-flow rises along described degassing tower and contacts with liquid polymerization liquid phase, thus strengthens mass transfer effect
Fruit goes out unreacted monomer with air stripping.
In above-mentioned degassing method, described unreacted monomer includes ethylene and/or propylene.
The present invention is by using removing glue liquid impurity technology, optimizing heater structure (such as, by providing
Heater (E-1), heater (E-2) and heater (E-3)), optimize degassing tower operating parameter
(pressure tower controls at 0.2MPaA for tower top temperature 50～60 DEG C, column bottom temperature 90～100 DEG C),
Prevent material phase change technique (such as, by adding restricting element) and optimize heating steam parameter (steaming
Steam pressure is not less than 0.3MPaG), thus enhance material mass-and heat-transfer efficiency and avoid heater
Blocking.
Accompanying drawing explanation
Fig. 1 shows technological process according to an embodiment of the invention.
D-1: polymeric kettle；
T-1: degassing tower；
T-2: purifying column；
E-1: heater；
E-2: heater；
E-3: heater；
F-1: filter；
P-1: delivery pump；
P-2: delivery pump；
TC: temperature controls；
LC: Liquid level；
PC: Stress control；
FC: flow-control.
Detailed description of the invention
Below in conjunction with accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described,
Obviously, described embodiment is only a part of embodiment of the present invention rather than whole embodiments.
Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained,
Broadly fall into the scope of protection of the invention.
The polymer fluid discharged by polymeric kettle (D-1) enters degassing tower (T-1) degassing through decompression.At the bottom of tower
Polymer fluid heater via (E-2) steam be heated to be air stripping provide a part of heat, another part heat by
External solvent heater via (E-1) steam heating and gasifying becomes gaseous state to enter acquisition in tower.
Macromolecular mass shaped polymer may be contained by being polymerized in the polymer fluid come, prevent blocking heat exchanger tube and exist
Remove through filter (F-1) before entering heater.
Polymer fluid viscosity is big to ensure that when heater (E-2) heats a suitable flow velocity is to prevent
Laminar flow and cause the overheated glutinous wall of material reduce heat transfer efficiency, even block heat exchanger tube.
The polymer fluid that heater via (E-2) heats added restricting element before backing into tower (T-1),
To prevent the polymer fluid of heat from causing adding heat pipe and conveyance conduit blocking entering front the undergoing phase transition of tower (T-1).
The solvent of gasification enters in tower (T-1), and gaseous solvent air-flow contacts along tower rising with liquid,
Strengthen mass transfer effect air stripping and go out unreacted monomer (ethylene, propylene etc.).Go out with tower (T-1) top row
Gas enter compressor (C-1) pressurization return polymeric kettle (D-1).Pressurized condense logistics
Enter purifying column (T-2) and purify monomer further.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. made, all should wrap
Within being contained in protection scope of the present invention.
Claims (7)
1. the degassing method during an EP rubbers produces, it is characterised in that including:
By the polymer fluid discharged at the bottom of degassing tower (T-1) tower by filter to remove macromolecule polyalcohol；
By heater (E-2), described polymer fluid is carried out heating and think that air stripping provides a part of heat；
The polymer fluid heated through described heater (E-2) enters the middle degassing of degassing tower (T-1) to propose
Unreacted monomer.
Degassing method the most according to claim 1, it is characterised in that also include:
The polymer fluid discharged by described polymeric kettle (D-1) enters described degassing tower (T-1) after decompression
Degassing.
Degassing method the most according to claim 1, it is characterised in that by heater (E-1)
Heat external solvent, so that described external solvent is gasificated into gaseous state and enters in described degassing tower (T-1)
Think that air stripping provides another part heat.
Degassing method the most according to claim 1, it is characterised in that add described in polymer fluid process
During hot device (E-2) heating, it is ensured that the flow velocity of polymer fluid is not less than 1m/s to prevent laminar flow from causing
The overheated glutinous wall of material reduces heat transfer efficiency.
Degassing method the most according to claim 1, it is characterised in that through described heater (E-2)
The polymer fluid of heating added restricting element before entering described degassing tower (T-1), to prevent the polymerization of heat
Liquid causes adding heat pipe and conveyance conduit blocking entering described degassing tower (T-1) front undergoing phase transition.
Degassing method the most according to claim 3, it is characterised in that the described outside of gasification is molten
Agent enters in described degassing tower (T-1), and gaseous solvent air-flow rises along described degassing tower and gathers with liquid
Conjunction liquid phase contacts, thus strengthens mass transfer effect and go out unreacted monomer with air stripping.
7. according to the degassing method described in claim 1 or 6, it is characterised in that described unreacted
Monomer includes ethylene and/or propylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610398222.2A CN105920881B (en) | 2016-06-07 | 2016-06-07 | Degassing method in EP rubbers production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610398222.2A CN105920881B (en) | 2016-06-07 | 2016-06-07 | Degassing method in EP rubbers production |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105920881A true CN105920881A (en) | 2016-09-07 |
| CN105920881B CN105920881B (en) | 2019-03-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610398222.2A Active CN105920881B (en) | 2016-06-07 | 2016-06-07 | Degassing method in EP rubbers production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105920881B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107941051A (en) * | 2017-10-11 | 2018-04-20 | 中国石油集团东北炼化工程有限公司吉林设计院 | Heat exchanger and EP rubbers production solvent recovering system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4550149A (en) * | 1982-09-24 | 1985-10-29 | Cosden Technology, Inc. | Process for producing styrenic/alkenylnitrile copolymers |
| CN1907543A (en) * | 2005-07-13 | 2007-02-07 | 中国石油兰州石油化工公司 | Gaseous impurity removing tower and method for gaseous impurity removing |
| CN103145901A (en) * | 2011-12-06 | 2013-06-12 | 中国石油天然气股份有限公司 | Method for recovering ethylene propylene rubber polymerization reaction monomer |
| CN105377916A (en) * | 2013-06-10 | 2016-03-02 | 株式会社Lg化学 | Method for preparing elastic terpolymer |
-
2016
- 2016-06-07 CN CN201610398222.2A patent/CN105920881B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4550149A (en) * | 1982-09-24 | 1985-10-29 | Cosden Technology, Inc. | Process for producing styrenic/alkenylnitrile copolymers |
| CN1907543A (en) * | 2005-07-13 | 2007-02-07 | 中国石油兰州石油化工公司 | Gaseous impurity removing tower and method for gaseous impurity removing |
| CN103145901A (en) * | 2011-12-06 | 2013-06-12 | 中国石油天然气股份有限公司 | Method for recovering ethylene propylene rubber polymerization reaction monomer |
| CN105377916A (en) * | 2013-06-10 | 2016-03-02 | 株式会社Lg化学 | Method for preparing elastic terpolymer |
Non-Patent Citations (1)
| Title |
|---|
| 焦书科: "《橡胶化学与物理导论》", 30 June 2009 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107941051A (en) * | 2017-10-11 | 2018-04-20 | 中国石油集团东北炼化工程有限公司吉林设计院 | Heat exchanger and EP rubbers production solvent recovering system |
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| Publication number | Publication date |
|---|---|
| CN105920881B (en) | 2019-03-01 |
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Effective date of registration: 20200928 Address after: 132002 3-6 and 9-13 floors of Block A, Jihua Economic and Trade Center, Tongtan Road, Changyi District, Jilin Province Patentee after: PetroChina Jilin Chemical Engineering Co.,Ltd. Address before: 132002, Jilin, Jilin Province tung Chi Road East Economic and Trade Building Patentee before: JILIN DESIGNING INSTITUTE OF CNPC NORTHEAST REFINING & CHEMICAL ENGINEERING Co.,Ltd. |