CN107840904A - A kind of high density polyethylene (HDPE) mother liquor deactivation processes - Google Patents
A kind of high density polyethylene (HDPE) mother liquor deactivation processes Download PDFInfo
- Publication number
- CN107840904A CN107840904A CN201711076262.6A CN201711076262A CN107840904A CN 107840904 A CN107840904 A CN 107840904A CN 201711076262 A CN201711076262 A CN 201711076262A CN 107840904 A CN107840904 A CN 107840904A
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- CN
- China
- Prior art keywords
- hdpe
- mother liquors
- knockout drum
- water
- alkali lye
- Prior art date
- 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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- 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
- C08F6/02—Neutralisation of the polymerisation mass, e.g. killing the catalyst also removal of catalyst residues
-
- 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
- C08F110/00—Homopolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
- C08F110/02—Ethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/062—HDPE
Abstract
The present invention relates to a kind of high density polyethylene (HDPE) mother liquor deactivation processes, the technique comprises the following steps：(1) the HDPE mother liquors from upstream, alkali lye or water are injected into its conveyance conduit；The HDPE mother liquors for adding water or alkali lye enter in blender；(2) it is sufficiently mixed under the stirring of blender axial blade, makes the catalyst inactivation in HDPE mother liquors, obtains the HDPE mother liquors after catalyst inactivation；(3) the HDPE mother liquors after catalyst inactivation are transported in knockout drum after being pressurizeed in the presence of blender centrifuge blade, by controlling differential pressure type liquid level transmitter I, differential pressure type liquid level transmitter II to be separated in the presence of low-pressure steam, the HDPE mother liquors after volatile matter, separation, the water or alkali lye and steam condensate after separation are respectively obtained；It is back to after volatilization lease making B-grade condensation in the knockout drum；Water or alkali lye after separation are discharged to water treatment system；Steam condensate enters lime set pipeline；HDPE mother liquors after separation are transported to follow-up workshop section.The inventive method is simple, easy to implement.
Description
Technical field
The present invention relates to high density polyethylene (HDPE)（HDPE）Production field, more particularly to a kind of high density polyethylene (HDPE) mother liquor inactivation
Technique.
Background technology
HDPE is a kind of TPO generated by ethylene copolymer, has good heat resistance and cold resistance, chemistry
Stability is good, is resistant to the erosion of most of soda acids, and electrical insulating property is excellent, is a kind of important raw material of industry.
In HDPE production processes, its polymerisation is that under pressure, ethene is gathered under catalyst action
Symphysis is into HDPE, and partial reaction catalyst can enter HDPE mother liquors during being somebody's turn to do, because the catalyst also has certain work
Property, cause HDPE in subsequent delivery, packaging, storage and transport process that blast accident easily occurs.
The content of the invention
The technical problems to be solved by the invention are to provide the high density polyethylene (HDPE) mother liquor that a kind of method is simple, easy to implement
Deactivation processes.
To solve the above problems, a kind of high density polyethylene (HDPE) mother liquor deactivation processes of the present invention, comprise the following steps：
(1) the HDPE mother liquors from upstream, if its pH value pH value is detected less than 7, into its conveyance conduit by its volume
0.0125 ~ 0.0625 times of injection alkali lye；If pH value be more than or equal to 7, into its conveyance conduit by its volume 0.0125 ~
0.0625 times of injection water；The HDPE mother liquors for adding water or alkali lye enter in blender；
(2) it is sufficiently mixed under the stirring of the blender axial blade, makes the catalyst inactivation in HDPE mother liquors, be catalyzed
HDPE mother liquors after agent inactivation；
(3) the HDPE mother liquors after the catalyst inactivation are transported to separation after being pressurizeed in the presence of the blender centrifuge blade
In tank, while low-pressure steam is delivered in the knockout drum, by controlling differential pressure type liquid level pick-up in the presence of low-pressure steam
Device I, differential pressure type liquid level transmitter II are separated, and respectively obtain the HDPE mother liquors after volatile matter, separation, the water or alkali after separation
Liquid and steam condensate；
The volatile matter enters first-stage condenser at the top of the knockout drum, while recirculated cooling water condenses into the one-level
Device, in the presence of the recirculated cooling water, respectively obtain one-level condensate liquid and one-level waste gas；The one-level condensate liquid is by described
First-stage condenser bottom enters surge tank；The one-level waste gas enters secondary condenser by the first-stage condenser top, simultaneously
Freezing liquid enters the secondary condenser, in the presence of the freezing liquid, respectively obtains B-grade condensation liquid and two level waste gas；Institute
State B-grade condensation liquid and the surge tank is entered by the first-stage condenser bottom；The two level exhaust gas evacuation；Into the buffering
The one-level condensate liquid and the B-grade condensation liquid in tank are back in the knockout drum by gravity by check-valves；
Water or alkali lye after the separation are discharged to water treatment system by the knockout drum bottom through control valve I；
The steam condensate enters lime set pipeline by the knockout drum bottom；
HDPE mother liquors after the separation are transported to follow-up workshop section by pump through control valve II.
The step (1) in alkali lye refer to mass concentration be 10% ~ 20% NaOH or KOH solution.
The step (3) in knockout drum on be respectively equipped with the differential pressure type liquid level transmitter I, the differential pressure type liquid level become
Send device II.
The upper end pressure point of the differential pressure type liquid level transmitter I is located at the knockout drum top gas phase space, lower end pressure
Point is located at liquid Space in the middle part of the knockout drum.
The upper end pressure point of the differential pressure type liquid level transmitter II is located at the knockout drum top gas phase space, lower end pressure
Point is located at knockout drum bottom liquid Space.
The present invention has advantages below compared with prior art：
1st, the present invention utilizes HDPE mother liquors and water or the immiscible characteristic of alkali lye, and deactivator and HDPE mother liquors are used as by the use of water or alkali lye
The catalyst inactivation made in HDPE mother liquors is sufficiently mixed, and by controlling differential pressure type liquid level transmitter, makes the HDPE after inactivation female
Liquid reaches the purpose separated with water or alkali lye.
2nd, the inventive method is simple, easy to implement.
Brief description of the drawings
The embodiment of the present invention is described in further detail below in conjunction with the accompanying drawings.
Fig. 1 is the general flow chart of the present invention.
In figure：1-blender；2-knockout drum；3-pump；；4-first-stage condenser；5-secondary condenser；6-buffering
Tank；7-differential pressure type liquid level transmitter I；8-differential pressure type liquid level transmitter II；9-control valve I；10-control valve II.
Embodiment
As shown in figure 1, a kind of high density polyethylene (HDPE) mother liquor deactivation processes, comprise the following steps：
(1) the HDPE mother liquors from upstream, if its pH value pH value is detected less than 7, into its conveyance conduit by its volume
0.0125 ~ 0.0625 times of injection alkali lye；If pH value be more than or equal to 7, into its conveyance conduit by its volume 0.0125 ~
0.0625 times of injection water；The HDPE mother liquors for adding water or alkali lye enter in blender 1.Alkali lye refers to that mass concentration is 10% ~ 20%
NaOH or KOH solution.
(2) it is sufficiently mixed under the stirring of the axial blade of blender 1, makes the catalyst inactivation in HDPE mother liquors, be catalyzed
HDPE mother liquors after agent inactivation.
(3) the HDPE mother liquors after catalyst inactivation are transported to knockout drum 2 after being pressurizeed in the presence of the centrifuge blade of blender 1
It is interior, while low-pressure steam is delivered in knockout drum 2, in the presence of low-pressure steam by control differential pressure type liquid level transmitter I 7,
Differential pressure type liquid level transmitter II 8 is separated, and respectively obtains the HDPE mother liquors after volatile matter, separation, the water or alkali lye after separation
And steam condensate.
Volatile matter enters first-stage condenser 4 from the top of knockout drum 2, while recirculated cooling water enters first-stage condenser 4, is following
In the presence of ring cooling water, one-level condensate liquid and one-level waste gas are respectively obtained；One-level condensate liquid is entered by the bottom of first-stage condenser 4
Surge tank 6；One-level waste gas enters secondary condenser 5 by the top of first-stage condenser 4, while freezing liquid enters secondary condenser 5,
In the presence of freezing liquid, B-grade condensation liquid and two level waste gas are respectively obtained；B-grade condensation liquid is entered slow by the bottom of first-stage condenser 4
Rush tank 6；Two level exhaust gas evacuation；Returned into the one-level condensate liquid in surge tank 6 and B-grade condensation liquid by gravity by check-valves
Flow in knockout drum 2.
Water or alkali lye after separation are discharged to water treatment system by the bottom of knockout drum 2 through control valve I 9.
Steam condensate enters lime set pipeline by the bottom of knockout drum 2.
HDPE mother liquors after separation are transported to follow-up workshop section by pump 3 through control valve II 10.
Wherein：Differential pressure type liquid level transmitter I 7, differential pressure type liquid level transmitter II 8 are respectively equipped with knockout drum 2.
The upper end pressure point of differential pressure type liquid level transmitter I 7 is located at the top gas phase space of knockout drum 2, lower end pressure point
The middle part liquid Space of knockout drum 2 is located at, the row of HDPE mother liquors by differential pressure type liquid level transmitter I 7 and control valve II 10, can be controlled
Output, so as to control the liquid level of knockout drum 2.
The upper end pressure point of differential pressure type liquid level transmitter II 8 is located at the top gas phase space of knockout drum 2, and pressure point in lower end is located at
The bottom liquid phases space of knockout drum 2.
The liquid level difference of differential pressure type liquid level transmitter II 8 and differential pressure type liquid level transmitter I 7 is under differential pressure type liquid level transmitter I 7
The difference in height between pressure point and the lower end pressure point of differential pressure type liquid level transmitter II 8 is held, this is highly definite value, but due to water or alkali
Liquid is different from the density of HDPE mother liquors, the actual measurement liquid level difference meeting of differential pressure type liquid level transmitter II 8 and differential pressure type liquid level transmitter I 7
Change with the bottom water of knockout drum 2 or the amount of alkali lye, differential pressure type liquid level transmitter II 8 and differential pressure type liquid level transmitter I 7 can be passed through
Liquid level difference and control valve I 9, the water of control knockout drum 2 bottom or the liquid level of alkali lye are surveyed, so as to reach HDEP mother liquors and water or alkali
The purpose of liquid separation.
Claims (5)
1. a kind of high density polyethylene (HDPE) mother liquor deactivation processes, comprise the following steps：
(1) the HDPE mother liquors from upstream, if its pH value pH value is detected less than 7, into its conveyance conduit by its volume
0.0125 ~ 0.0625 times of injection alkali lye；If pH value be more than or equal to 7, into its conveyance conduit by its volume 0.0125 ~
0.0625 times of injection water；The HDPE mother liquors for adding water or alkali lye enter blender（1）It is interior；
(2) in the blender（1）It is sufficiently mixed under the stirring of axial blade, makes the catalyst inactivation in HDPE mother liquors, urged
HDPE mother liquors after agent inactivation；
(3) the HDPE mother liquors after the catalyst inactivation are in the blender（1）It is transported to point after being pressurizeed in the presence of centrifuge blade
From tank（2）It is interior, while low-pressure steam is delivered to the knockout drum（2）It is interior, it is differential by controlling in the presence of low-pressure steam
Fluid level transmitter I（7）, differential pressure type liquid level transmitter II（8）Separated, respectively obtain volatile matter, separation after HDPE mother liquors,
Water or alkali lye and steam condensate after separation；
The volatile matter is from the knockout drum（2）Top enters first-stage condenser（4）, while recirculated cooling water enters the one-level
Condenser（4）, in the presence of the recirculated cooling water, respectively obtain one-level condensate liquid and one-level waste gas；The one-level condensation
Liquid is by the first-stage condenser（4）Bottom enters surge tank（6）；The one-level waste gas is by the first-stage condenser（4）Top is entered
Enter secondary condenser（5）, while freezing liquid enters the secondary condenser（5）, in the presence of the freezing liquid, respectively obtain
B-grade condensation liquid and two level waste gas；The B-grade condensation liquid is by the first-stage condenser（4）Bottom enters the surge tank（6）；
The two level exhaust gas evacuation；Into the surge tank（6）In the one-level condensate liquid and the B-grade condensation liquid pass through gravity
The knockout drum is back to by check-valves（2）In；
Water or alkali lye after the separation is by the knockout drum（2）Bottom is through control valve I（9）It is discharged to water treatment system；
The steam condensate is by the knockout drum（2）Bottom enters lime set pipeline；
HDPE mother liquors after the separation pass through pump（3）Through control valve II（10）It is transported to follow-up workshop section.
A kind of 2. high density polyethylene (HDPE) mother liquor deactivation processes as claimed in claim 1, it is characterised in that：The step (1) in
Alkali lye refers to the NaOH or KOH solution that mass concentration is 10% ~ 20%.
A kind of 3. high density polyethylene (HDPE) mother liquor deactivation processes as claimed in claim 1, it is characterised in that：The step (3) in
Knockout drum（2）On be respectively equipped with the differential pressure type liquid level transmitter I（7）, the differential pressure type liquid level transmitter II（8）.
A kind of 4. high density polyethylene (HDPE) mother liquor deactivation processes as claimed in claim 1, it is characterised in that：The differential pressure type liquid level
Transmitter I（7）Upper end pressure point be located at the knockout drum（2）Top gas phase space, lower end pressure point are located at the knockout drum
（2）Middle part liquid Space.
A kind of 5. high density polyethylene (HDPE) mother liquor deactivation processes as claimed in claim 1, it is characterised in that：The differential pressure type liquid level
Transmitter II（8）Upper end pressure point be located at the knockout drum（2）Top gas phase space, lower end pressure point are located at the knockout drum
（2）Bottom liquid phases space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711076262.6A CN107840904A (en) | 2017-11-06 | 2017-11-06 | A kind of high density polyethylene (HDPE) mother liquor deactivation processes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711076262.6A CN107840904A (en) | 2017-11-06 | 2017-11-06 | A kind of high density polyethylene (HDPE) mother liquor deactivation processes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107840904A true CN107840904A (en) | 2018-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711076262.6A Pending CN107840904A (en) | 2017-11-06 | 2017-11-06 | A kind of high density polyethylene (HDPE) mother liquor deactivation processes |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86100667A (en) * | 1985-01-28 | 1986-07-23 | 杜邦公司加拿大分公司 | The deactivation of catalyzer in the polymerization of alpha-olefin solution method |
| CN87103140A (en) * | 1986-04-25 | 1987-11-18 | 杜邦公司加拿大分公司 | Yi Bingchunan is as the deactivators of the catalyzer of alpha-olefin solution polymerization process |
| CN1993390A (en) * | 2004-08-27 | 2007-07-04 | 切夫里昂菲利普化学有限责任公司 | Energy efficient polyolefin process |
| CN101495518A (en) * | 2006-06-20 | 2009-07-29 | 陶氏环球技术公司 | Polymer catalyst deactivation and acid neutralization using ionomers |
-
2017
- 2017-11-06 CN CN201711076262.6A patent/CN107840904A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86100667A (en) * | 1985-01-28 | 1986-07-23 | 杜邦公司加拿大分公司 | The deactivation of catalyzer in the polymerization of alpha-olefin solution method |
| CN87103140A (en) * | 1986-04-25 | 1987-11-18 | 杜邦公司加拿大分公司 | Yi Bingchunan is as the deactivators of the catalyzer of alpha-olefin solution polymerization process |
| CN1993390A (en) * | 2004-08-27 | 2007-07-04 | 切夫里昂菲利普化学有限责任公司 | Energy efficient polyolefin process |
| CN101495518A (en) * | 2006-06-20 | 2009-07-29 | 陶氏环球技术公司 | Polymer catalyst deactivation and acid neutralization using ionomers |
Non-Patent Citations (2)
| Title |
|---|
| E.E.路德维希 编著: "《化工装置的工艺设计 第二册"》", 31 March 1983, 化学工业出版社 * |
| 林锦国 编著: "《过程控制》", 30 September 2009, 东南大学出版社 * |
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Application publication date: 20180327 |