CN109776855A - Method for recovering solvents for rare-earth isoprene rubber production technology - Google Patents
Method for recovering solvents for rare-earth isoprene rubber production technology Download PDFInfo
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Abstract
The present invention relates to polymer production fields, disclose a kind of method for recovering solvents for rare-earth isoprene rubber production technology, include: that the partial solvent steam that will be stripped by cohesion unit exchanges heat with wet solvent, respectively obtains the wet solvent of the first condensing solvent and preheating；Then the wet solvent of the preheating is introduced into solvent recovery unit and is isolated and purified, and first condensing solvent is removed water to obtain wherein water content and be reduced to saturation capacity the second condensing solvent below；Then the recycling design obtained after isolating and purifying is mixed with second condensing solvent to obtain being recycled back to the circulation solvent of polymerized unit.Method for recovering solvents for rare-earth isoprene rubber production technology of the invention can reduce the load of solvent recovery unit significantly, have preferable energy conservation and consumption reduction effects.
Description
Technical field
The present invention relates to polymer production fields, and in particular, to a kind of for the molten of rare-earth isoprene rubber production technology
Agent recovery method.
Background technique
Rare-earth isoprene rubber is one of synthetic rubber, is polymerize under the action of catalyst by isoprene monomer
The polymer of reaction and generation.
Since the physical property and mechanical performance of rare-earth isoprene rubber are similar to natural rubber (NR), rare-earth isoprene rubber
Also referred to as " natural man-made rubber ".Specifically, rare-earth isoprene rubber has excellent elasticity, leakproofness, creep resistant, wear-resisting
Property, heat resistance and tear resistance, and tensile strength and elongation can be used as also close to natural rubber, therefore in some cases
The substitute of natural rubber can also be applied in combination with natural rubber or other synthetic rubber.
Currently, on commercial plant, the main production that rare-earth isoprene rubber is carried out using solution polymerization process.It is polymerizeing
Isoprene monomer, hexane solvent and rare earth catalyst are added into polymer reactor for unit.Isoprene monomer is in rare earth
It carries out polymerisation in solution under the action of catalyst, forms rare-earth isoprene rubber glue, in addition to different containing target product rare earth in glue
Outside penta rubber straight polymer, also containing a large amount of hexane and a small amount of unreacted isoprene monomer (weight of isoprene monomer
Measure conversion ratio≤95%).
Therefore, in order to obtain pure rare-earth isoprene rubber polymeric articles, it is desirable to provide enough energy as much as possible will
Solvent is extracted from glue with unreacted isoprene monomer, and makes solvent and unreacted with recovery process by purification
Isoprene monomer recycled, to reduce the wasting of resources.Herein separation with removal process in, it is desirable to provide energy
Amount is lower, more advantageously reduces the production cost of rare-earth isoprene rubber.
In the prior art, cohesion process is generallyd use by solvent and unreacted isoprene monomer from rare earth isoamyl rubber
It is stripped off in glue glue, to achieve the purpose that polymer purifies.The solvent and unreacted isoprene monomer being stripped off are complete
Portion enters solvent recovery unit, completes the purification and recycling of solvent and unreacted isoprene monomer, qualified solvent and not
The isoprene monomer of reaction is recycled back to polymerized unit and is re-used.In solvent recovery unit, several rectifying are generallyd use
The separation and purification of tower completion each component.In order to realize energy-saving purpose, those skilled in the art are mainly from optimization rectifying
A large amount of research work is carried out in the combination and mode of operation of tower.It discloses in CN101045798A and is completed with a rectifying column
The dehydration of solvent and unreacted isoprene monomer, scheme that is de- light and taking off weight；It is disclosed in CN1908040A with multiple rectifying
The technique that tower replaces single tower distillation；CN102234356A, which is disclosed, recycles preparation process flow using multitower to improve solvent and different
The purity of pentadiene；CN104629082A is disclosed using double tower continuous processing, and each tower is equipped with side line, produces solvent respectively
And isoprene monomer.
In the above prior art, energy consumption proportion in the production cost of rare-earth isoprene rubber is higher, for agglomerating
Unit and total steam consumption quantity of solvent recovery unit are about 5~6 ton/ton dry glues, wherein the steam consumption quantity of solvent recovery unit
45 weight % of the total steam consumption quantity of Zhan or so.
Summary of the invention
The purpose of the present invention is overcoming the drawbacks described above of the prior art, provide it is a kind of with energy conservation and consumption reduction effects for dilute
The method for recovering solvents of native isoprene rubber production technology.
To achieve the goals above, the present invention provides a kind of solvent recovery side for rare-earth isoprene rubber production technology
Method, this method carry out in the device for including polymerized unit, cohesion unit and solvent recovery unit, this method comprises: coming from institute
The rare-earth isoprene rubber glue for stating polymerized unit, which enters in the cohesion unit, to be stripped, and solvent vapo(u)r is obtained；By part institute
It states solvent vapo(u)r to exchange heat with wet solvent, respectively obtains the wet solvent of the first condensing solvent and preheating；Then by the preheating
Wet solvent be introduced into the solvent recovery unit and isolated and purified, and by first condensing solvent remove water with
Saturation capacity the second condensing solvent below is reduced to wherein water content；Then by the recycling design obtained after isolating and purifying with
Second condensing solvent is mixed to obtain being recycled back to the circulation solvent of the polymerized unit, wherein the wet solvent is logical
It crosses that solvent vapo(u)r described in the remainder that strips of cohesion unit is successively condensed and removed water and obtains.
The present invention condenses the solvent after removed water with remainder by that will agglomerate the partial solvent steam that unit is stripped off
Steam exchanges heat, and the wet solvent of the preheating obtained after heat exchange is introduced into solvent recovery unit and is isolated and purified, and
The solvent obtained after isolating and purifying, which is recycled back to polymerized unit and re-uses, has preferable energy conservation and consumption reduction effects；In addition, will coagulate
The obtained after being exchanged heat after the condensation water removal of partial solvent steam that poly- unit is stripped off with the solvent vapo(u)r of remainder
It is recycled directly back in polymerized unit use as circulation solvent after the water removal of one condensing solvent, has been significantly reduced solvent recovery in this way
The load of unit.
Detailed description of the invention
Fig. 1 is the process flow diagram of a preferred embodiment of the method for the present invention.
Description of symbols
1 polymerized unit 2 agglomerates unit
3 solvent recovery unit, 4 isoprene monomer
5 rare earth catalysts 6 recycle solvent
7 condenser, 8 wet solvent
9 preheater, 10 first condensing solvent
12 dispenser of wet solvent of 11 preheatings
13 absorber, 14 second condensing solvent
15 recycling designs
Specific embodiment
The endpoint of disclosed range and any value are not limited to the accurate range or value herein, these ranges or
Value should be understood as comprising the value close to these ranges or value.For numberical range, between the endpoint value of each range, respectively
It can be combined with each other between the endpoint value of a range and individual point value, and individually between point value and obtain one or more
New numberical range, these numberical ranges should be considered as specific open herein.
As previously mentioned, the present invention provides a kind of method for recovering solvents for rare-earth isoprene rubber production technology, the party
Method carries out in the device for including polymerized unit, cohesion unit and solvent recovery unit, this method comprises: single from the polymerization
The rare-earth isoprene rubber glue of member, which enters in the cohesion unit, to be stripped, and solvent vapo(u)r is obtained；The part solvent is steamed
Vapour exchanges heat with wet solvent, respectively obtains the wet solvent of the first condensing solvent and preheating；Then by the wet solvent of the preheating
It is introduced into the solvent recovery unit and is isolated and purified, and first condensing solvent is removed water to obtain wherein water
Content is reduced to saturation capacity the second condensing solvent below；Then by the recycling design obtained after isolating and purifying and described second
Condensing solvent is mixed to obtain being recycled back to the circulation solvent of the polymerized unit, wherein the wet solvent passes through will be described
Solvent vapo(u)r described in the remainder that cohesion unit strips, which is successively condensed and removed water, to be obtained.
The present invention with wet solvent by exchanging heat the partial solvent steam stripped by the cohesion unit with cold
It is solidifying, using being recycled in pumped back polymerized unit together with the recycling design for removing water and being obtained after isolating and purifying, reduce
Into the wet solvent amount of solvent recovery unit, quantity of steam required for solvent recovery unit and total solvent recovery is reduced,
With preferable energy conservation and consumption reduction effects.
The remainder solvent vapo(u)r that the cohesion unit strips refers to, strips to obtain by the cohesion unit
Whole solvent vapo(u)rs in, subtract the part solvent vapo(u)r for exchanging heat with the wet solvent in the solvent recovery unit
Remaining part.
Described isolate and purify can be for ordinary skill in the art means, such as rectifying etc., the rectifying can comprising
It is carried out in the rectifying column in the solvent recovery unit.
Preferably, the condition isolated and purified described in control, so that the water content in the recycling design is not higher than 25ppm.
Preferably, the condition that first condensing solvent is removed water is controlled, so that by the second condensation obtained after removing water
Water content in solvent is not higher than 20ppm.
Preferably, the part to exchange heat with wet solvent the solvent vapo(u)r accounts for the whole that the cohesion unit strips
10~35 weight % of solvent vapo(u)r.
It strips to obtain it is highly preferred that accounting for the cohesion unit with the part solvent vapo(u)r that the wet solvent exchanges heat
Whole solvent vapo(u)rs 15~25 weight %.
It is particularly preferred that accounting for what the cohesion unit stripped with the part solvent vapo(u)r that wet solvent exchanges heat
20~25 weight % of whole solvent vapo(u)rs.The present inventor has found under study for action, what control exchanged heat with wet solvent
When the part solvent vapo(u)r is accounted within the scope of 20~25 weight % of whole solvent vapo(u)rs that the cohesion unit strips, energy
Enough make the method for recovering solvents of rare-earth isoprene rubber production technology of the present invention that there is more obvious energy-saving effect, and
The quality that can guarantee obtained circulation solvent, makes it sufficiently meet the requirement of polymerization.
Preferably, the condition for controlling the heat exchange makes the temperature ratio of first condensing solvent obtained after heat exchange
The dew-point temperature of first condensing solvent is 10~35 DEG C low.
It is highly preferred that the condition for controlling the heat exchange makes the temperature of first condensing solvent obtained after heat exchange
20~30 DEG C lower than the dew-point temperature of first condensing solvent.The present inventor has found under study for action, changes described in control
The condition of heat makes the temperature of first condensing solvent obtained after heat exchange than the dew point temperature of first condensing solvent
When spending within the scope of low 20~30 DEG C, the requirement of heat exchanging device can reduce, it is easy to accomplish technological operation, and can guarantee wet solvent
Pre-heat effect.Those skilled in the art can be by selecting suitable heat exchanger, the appropriate part adjusted into heat exchanger
The condition that the means such as the ratio of solvent vapo(u)r and wet solvent control the heat exchange to obtain after heat exchange described first cold
The temperature of solidifying solvent reaches design requirement.
Preferably, the step of first condensing solvent being removed water include: by by obtained after heat exchange described the
One condensing solvent successively carries out liquid separation and adsorption dewatering processing.The present invention passes through first condensing solvent that will be obtained after heat exchange
Liquid separation is carried out to remove the free water in the first condensing solvent, and handle to remove and separate free water by adsorption dewatering
At least partly non-free water in first condensing solvent.
Preferably, the liquid separation processing of first condensing solvent carries out in dispenser.
It is highly preferred that the dispenser is liquid liquid separator.
Preferably, the step of adsorption dewatering is handled includes: by first condensing solvent and molecular sieve after liquid separation
It is contacted.
It is highly preferred that the condition of the contact include: relative to every kg liquid separation after first condensing solvent, described point
The dosage of son sieve is 0.4~0.55kg；The time of the contact is 30~45min.
Preferably, the molecular sieve is selected from least one of 3A molecular sieve, 4A molecular sieve and 5A molecular sieve.
In method for recovering solvents for rare-earth isoprene rubber production technology of the invention, occur in the polymerized unit
Polymerization reaction can carry out in traditional tank polymerization reactor, can also use the polymerization of other forms commonly used in the art
Reactor carries out.
There is no particular limitation for type of the present invention to solvent used in polymerized unit, can be using in the art conventional
The various solvents used, such as the aliphatic saturated hydrocarbon or alicyclic inert to reactive component commonly used in the art can be selected
Solvent, the alkane of Chang Xuanyong C6-C10 or the cycloalkane of C6-C10, such as n-hexane, hexamethylene, normal heptane, normal octane or it is mixed
Close object, preferably at least one of n-hexane, hexamethylene and normal heptane.
In method for recovering solvents for rare-earth isoprene rubber production technology of the invention, the cohesion unit is preferably used
The autoclave cohesion process route of traditional multi-floating bodies continuous operation carries out.
In order to illustrate more clearly of the method for recovering solvents for rare-earth isoprene rubber production technology of the invention, tie below
It closes Fig. 1 and a kind of preferred embodiment of method of the invention is provided:
Method for recovering solvents for rare-earth isoprene rubber production technology is including polymerized unit 1, cohesion unit 2 and solvent
It is carried out in the device of recovery unit 3, isoprene monomer 4, rare earth catalyst 5 and circulation solvent 6, which enter polymerized unit 1, to carry out
Polymerization reaction, wherein rare earth isoprene glue obtained in polymerized unit 1, which enters in cohesion unit 2, carries out solvent stripping behaviour
Make.Be divided into two parts by agglomerating the solvent vapo(u)r that strips of unit, a portion enter in condenser 7 carry out it is cold
Solidifying, condensed material obtains wet solvent 8 by dehydration, and remainder solvent vapo(u)r is changed in preheater 9 with wet solvent 8
Heat respectively obtains the wet solvent 11 of the first condensing solvent 10 and preheating；Then the wet solvent 11 of the preheating is introduced described molten
It is isolated and purified in agent recovery unit 3, and first condensing solvent 10 is successively introduced into dispenser 12 and absorber 13
In removed water to obtain wherein water content and be reduced to saturation capacity the second condensing solvent 14 below；It then will be after isolating and purifying
Obtained recycling design 15 is mixed molten to obtain being recycled back to the circulation of the polymerized unit with second condensing solvent 14
Agent 6.
By using the method for recovering solvents for rare-earth isoprene rubber production technology of the invention, reduce into solvent
The amount of the wet solvent of recovery unit reduces quantity of steam required for solvent recovery unit and total solvent recovery, has bright
Aobvious effect of energy.
The present invention will be described in detail by way of examples below.
In case of no particular description, a variety of materials used below are all from commercially available.
Following example 1-4 and comparative example 1 are that solvent is dilute to prepare with n-hexane (dew-point temperature under normal pressure is 68 DEG C)
Native isoprene rubber, embodiment 5 prepare rare-earth isoprene rubber so that hexamethylene (dew-point temperature under normal pressure is 80 DEG C) is solvent, real
Example 6 is applied so that normal heptane (dew-point temperature under normal pressure is 98 DEG C) is solvent to prepare rare-earth isoprene rubber.Following embodiment and right
Ratio be all made of 3 kettles cohesion stripping process technology and dehydration, de- weight, take off 3 light tower recovery process carry out it is molten under atmospheric operation
Agent recycling.And in case of no particular description, the reaction condition of the polymerized unit in following embodiment and comparative example is equal are as follows:
Polymeric reaction temperature is 45 DEG C, and polymerization reaction time is 100 minutes, and pure rare earth isoprene rubber polymer throughput is 15kg/
H, concentration of the pure rare earth isoprene rubber polymer in glue are 14 weight %.
Embodiment 1-6 is for illustrating the method for recovering solvents for rare-earth isoprene rubber production technology of the invention.
Embodiment 1
The present embodiment is (molten by remainder by the 10 weight % and wet solvent that agglomerate whole solvent vapo(u)rs that unit is stripped off
Agent steam successively obtains after condensation and water removal, similarly hereinafter) heat exchange is carried out, which is condensed to 40 DEG C of liquid
The first condensing solvent, and the wet solvent preheated, which removes free water through dispenser, and passes through dress
There is the absorber of 3A molecular sieve to carry out adsorption dewatering processing, wherein relative to first condensing solvent after the liquid separation of every kg,
The dosage of the molecular sieve is 0.5kg；The time of the contact is 40min, obtains water content and is reduced to the second of 16ppm to condense
Solvent；Meanwhile the wet solvent of the preheating is introduced into solvent recovery unit, and distillation operation is carried out by rectifying column therein,
Obtain the recycling design that water content is 24ppm.Then second condensing solvent and the recycling design pumping circulation are gone back into institute
The water content stated in polymerized unit and used as circulation solvent, and recycle solvent is 23.2ppm.
As a result, quantity of steam consumed by cohesion unit is 2.8t/t dry glue, quantity of steam consumed by solvent recovery unit is
1.9t/t dry glue.
Comparative example 1
This comparative example is carried out using method similar to Example 1, the difference is that will agglomerate in unit in this comparative example
Whole solvent vapo(u)rs of acquisition are all condensed, and condensed wet solvent is introduced to solvent recovery unit and is carried out at rectifying
Reason, and the recycling design that the water content obtained after rectifying is 24ppm is recycled back in the polymerized unit as circulation solvent.
Remaining is in the same manner as in Example 1.
As a result, quantity of steam consumed by cohesion unit is 2.8t/t dry glue, quantity of steam consumed by solvent recovery unit is
2.4t/t dry glue.
Embodiment 2
The 15 weight % for agglomerating whole solvent vapo(u)rs that unit is stripped off and wet solvent are subjected to heat exchange in the present embodiment.
Remaining is in the same manner as in Example 1.
The second condensing solvent that water content is 16.5ppm is obtained, water content is the recycling design of 23ppm；And final
The circulation solvent for being 22ppm to water content.
As a result, quantity of steam consumed by cohesion unit is 2.8t/t dry glue, quantity of steam consumed by solvent recovery unit is
1.8t/t dry glue.
Embodiment 3
The 20 weight % for agglomerating whole solvent vapo(u)rs that unit is stripped off and wet solvent are subjected to heat exchange in the present embodiment.
Remaining is in the same manner as in Example 1.
The second condensing solvent that water content is 17.5ppm is obtained, water content is the recycling design of 21.5ppm；And it is final
Obtain the circulation solvent that water content is 20.5ppm.
As a result, quantity of steam consumed by cohesion unit is 2.8t/t dry glue, quantity of steam consumed by solvent recovery unit is
1.6t/t dry glue.
Embodiment 4
The present embodiment is carried out using method same as Example 1, except that:
The 25 weight % for agglomerating whole solvent vapo(u)rs that unit is stripped off and wet solvent are subjected to heat exchange in the present embodiment.
Remaining is in the same manner as in Example 1.
The second condensing solvent that water content is 19ppm is obtained, water content is the recycling design of 20.6ppm；And final
The circulation solvent for being 20.1ppm to water content.
As a result, quantity of steam consumed by cohesion unit is 2.8 ton/ton dry glues, quantity of steam consumed by solvent recovery unit
For 1.5 ton/ton dry glues.
Embodiment 5
The 17 weight % for agglomerating whole solvent vapo(u)rs that unit is stripped off and wet solvent are carried out heat exchange by the present embodiment, should
Partial solvent steam is condensed to the first condensing solvent of 55 DEG C of liquid, and the wet solvent preheated, first condensation
Solvent removes free water through dispenser, and carries out adsorption dewatering processing by the absorber equipped with 3A molecular sieve, wherein relative to
First condensing solvent after the liquid separation of every kg, the dosage of the molecular sieve are 0.48kg；The time of the contact is
30min obtains the second condensing solvent that water content is reduced to 18ppm；Meanwhile the wet solvent of the preheating is introduced into solvent recovery
Unit, and distillation operation is carried out by rectifying column therein, obtain the recycling design that water content is 22ppm.Then by described
Two condensing solvents and the recycling design pumping circulation are returned in the polymerized unit and are used as circulation solvent, and recycle solvent
Water content is 21.2ppm.
As a result, quantity of steam consumed by cohesion unit is 2.8t/t dry glue, quantity of steam consumed by solvent recovery unit is
1.8t/t dry glue.
Embodiment 6
The 20 weight % for agglomerating whole solvent vapo(u)rs that unit is stripped off and wet solvent are carried out heat exchange by the present embodiment, should
Partial solvent steam is condensed to the first condensing solvent of 68 DEG C of liquid, and the wet solvent preheated, first condensation
Solvent removes free water through dispenser, and carries out adsorption dewatering processing by the absorber equipped with 3A molecular sieve, wherein relative to
First condensing solvent after the liquid separation of every kg, the dosage of the molecular sieve are 0.5kg；The time of the contact is 29min,
Obtain the second condensing solvent that water content is reduced to 19ppm；Meanwhile the wet solvent of the preheating is introduced into solvent recovery unit,
And distillation operation is carried out by rectifying column therein, obtain the recycling design that water content is 21.5ppm.Then cold by described second
Solidifying solvent and the recycling design pumping circulation are returned in the polymerized unit and are used as circulation solvent, and the water for recycling solvent contains
Amount is 21ppm.
As a result, quantity of steam consumed by cohesion unit is 2.8t/t dry glue, quantity of steam consumed by solvent recovery unit is
1.9t/t dry glue.
Result by comparing the embodiment of the present invention and comparative example can be seen that different for rare earth using of the invention
The method for recovering solvents of penta rubber production technology is straight after the condensation water removal of partial solvent steam that unit is stripped off by that will agglomerate
It connects to be recycled back to polymerized unit and re-use and can reduce the load of solvent recovery unit significantly, there is preferable energy-saving effect
Fruit.
The preferred embodiment of the present invention has been described above in detail, and still, the present invention is not limited thereto.In skill of the invention
In art conception range, can with various simple variants of the technical solution of the present invention are made, including each technical characteristic with it is any its
Its suitable method is combined, and it should also be regarded as the disclosure of the present invention for these simple variants and combination, is belonged to
Protection scope of the present invention.
Claims (11)
1. a kind of method for recovering solvents for rare-earth isoprene rubber production technology, this method is including polymerized unit, cohesion list
Member and solvent recovery unit device in carry out, this method comprises: the rare-earth isoprene rubber glue from the polymerized unit into
Enter and stripped in the cohesion unit, obtains solvent vapo(u)r；The part solvent vapo(u)r is exchanged heat with wet solvent, respectively
Obtain the wet solvent of the first condensing solvent and preheating；Then by the wet solvent of the preheating be introduced into the solvent recovery unit into
Row isolates and purifies, and first condensing solvent is removed water to obtain wherein water content and be reduced to saturation capacity below the
Two condensing solvents；Then the recycling design obtained after isolating and purifying is mixed with second condensing solvent to be followed
The circulation solvent of polymerized unit described in loopback, wherein the wet solvent is by by the remainder that strips of cohesion unit
Divide the solvent vapo(u)r successively to be condensed and removed water to obtain.
2. according to the method described in claim 1, wherein, the part solvent vapo(u)r to exchange heat with the wet solvent accounts for institute
State 10~35 weight % of whole solvent vapo(u)rs that cohesion unit strips.
3. according to the method described in claim 2, wherein, the part solvent vapo(u)r to exchange heat with the wet solvent accounts for institute
State 15~25 weight % of whole solvent vapo(u)rs that cohesion unit strips.
4. method described in any one of -3 according to claim 1, wherein the condition for controlling the heat exchange makes by heat exchange
The temperature of first condensing solvent obtained afterwards is 10~35 DEG C lower than the dew-point temperature of first condensing solvent；Preferably,
The condition for controlling the heat exchange makes the temperature of first condensing solvent obtained after heat exchange colder than described first
The dew-point temperature of solidifying solvent is 20~30 DEG C low.
5. method described in any one of -4 according to claim 1, wherein the condition isolated and purified described in control, so that institute
The water content in recycling design is stated not higher than 25ppm.
6. method described in any one of -5 according to claim 1, wherein control first condensing solvent is removed water
Condition, so that by the water content in the second condensing solvent for being obtained after removing water not higher than 20ppm.
7. method described in any one of -6 according to claim 1, wherein the step for removing water first condensing solvent
It suddenly include: that will successively carry out liquid separation and adsorption dewatering processing by first condensing solvent obtained after heat exchange.
8. according to the method described in claim 7, wherein, the liquid separation processing of first condensing solvent carries out in dispenser；
Preferably,
The dispenser is liquid liquid separator.
9. according to the method described in claim 7, wherein, the step of adsorption dewatering processing includes: will be described in after liquid separation
First condensing solvent is contacted with molecular sieve.
10. according to the method described in claim 9, wherein, the condition of the contact includes: the institute after the liquid separation relative to every kg
The first condensing solvent is stated, the dosage of the molecular sieve is 0.4~0.55kg；The time of the contact is 30~45min.
11. method according to claim 9 or 10, wherein the molecular sieve is selected from 3A molecular sieve, 4A molecular sieve and 5A points
At least one of son sieve.
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| CN112574469A (en) * | 2019-09-27 | 2021-03-30 | 中国石油化工股份有限公司 | Water removal method for synthetic rubber solvent |
| CN112745435A (en) * | 2019-10-31 | 2021-05-04 | 中国石油化工股份有限公司 | Process for converting polymer slurry into polymer solution and process for producing butyl rubber |
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| CN112574469A (en) * | 2019-09-27 | 2021-03-30 | 中国石油化工股份有限公司 | Water removal method for synthetic rubber solvent |
| CN112574469B (en) * | 2019-09-27 | 2022-07-12 | 中国石油化工股份有限公司 | Water removal method for synthetic rubber solvent |
| CN112745435A (en) * | 2019-10-31 | 2021-05-04 | 中国石油化工股份有限公司 | Process for converting polymer slurry into polymer solution and process for producing butyl rubber |
| CN112745435B (en) * | 2019-10-31 | 2022-07-12 | 中国石油化工股份有限公司 | Process for converting polymer slurry into polymer solution and process for producing butyl rubber |
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