CN110105557A - The adding method of polybutylene terephthalate (PBT) polyplant and catalyst - Google Patents
The adding method of polybutylene terephthalate (PBT) polyplant and catalyst Download PDFInfo
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- CN110105557A CN110105557A CN201910497578.5A CN201910497578A CN110105557A CN 110105557 A CN110105557 A CN 110105557A CN 201910497578 A CN201910497578 A CN 201910497578A CN 110105557 A CN110105557 A CN 110105557A
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- catalyst
- kettle
- pipeline
- prepolymerization
- pbt
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
- C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
- C08G63/16—Dicarboxylic acids and dihydroxy compounds
- C08G63/18—Dicarboxylic acids and dihydroxy compounds the acids or hydroxy compounds containing carbocyclic rings
- C08G63/181—Acids containing aromatic rings
- C08G63/183—Terephthalic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/78—Preparation processes
- C08G63/785—Preparation processes characterised by the apparatus used
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/78—Preparation processes
- C08G63/82—Preparation processes characterised by the catalyst used
- C08G63/85—Germanium, tin, lead, arsenic, antimony, bismuth, titanium, zirconium, hafnium, vanadium, niobium, tantalum, or compounds thereof
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polyesters Or Polycarbonates (AREA)
Abstract
The present invention relates to a kind of polybutylene terephthalate (PBT) polyplant and the adding methods of catalyst, the polybutylene terephthalate (PBT) polyplant includes esterifying kettle and prepolymerization kettle, the esterifying kettle and prepolymerization kettle have been respectively communicated with catalyst addition pipeline, and the reaction material outlet in the middle part of the esterifying kettle passes through the reaction material inlet communication in the middle part of conveyance conduit and prepolymerization kettle.The present invention is respectively communicated with catalyst by esterifying kettle and prepolymerization kettle and adds pipeline, catalyst butyl titanate can be added stage by stage, the water that esterification reaction process generation can be effectively reduced leads to catalyst hydrolytic inactivation, it can guarantee that polycondensation reaction well carries out by the way that catalyst butyl titanate is added again in polycondensation reaction stage, maintain the most highly active of catalyst, the loss of catalyst butyl titanate is reduced, cost is reduced.
Description
Technical field
The present invention relates to a kind of addition manner of catalyst and devices, and in particular to a kind of polybutylene terephthalate (PBT)
The adding method of polyplant and catalyst, belongs to chemical production field.
Background technique
Polybutylene terephthalate (PBT) (PBT) is a kind of crystalline thermoplastic polyester, has excellent comprehensive performance,
The fields such as electronics, electric appliance, automobile component, spinning are widely used.It is with p-phthalic acid that direct esterification, which polymerize PBT technique,
(PTA) and 1,4-butanediol (BD O) is raw material, and butyl titanate (TBT) is catalyst, by esterification, prepolymerization reaction
Macromolecular is generated under the control of the conditions such as temperature, pressure, residence time and speed of agitator with final polycondensation reaction three phases
Polymer P BT melt, supplies pelletizing, packaging system, and final production goes out the PBT slice of high-quality.
Catalyst butyl titanate is a kind of soluble transition metal complex, belongs to Lewi s acid catalyst, to ester
Exchange and polycondensation overall process are all effective, and active height, dosage is smaller, dissolves in the characteristics of reaction solution, in polyester production process
In be widely used.
In PBT polyester production, catalyst is that system is added by esterifying kettle bottom through accurate rotor measurement gear pump.But it is catalyzed
Agent butyl titanate easily hydrolytic inactivation can generate a large amount of water, therefore partially catalyzed in esterification process in esterification reaction process
Agent meeting hydrolytic inactivation, causes polycondensation reaction stage effective catalyst content less, causes poly- reaction eventually bad, pressure control is partially
Low, vacuum surplus is insufficient.It is normal for maintenance product viscosity under high load capacity, it is necessary to take and improve speed of agitator and vacuum degree, extension
The measures such as residence time of material, at the same also result under high load capacity spinning-grade PBT downstream user using when be frequent fracture of wire
Situations such as, PBT mass is seriously affected, PBT device production at high load is restricted.The hydrolysis of catalyst how is avoided, and makes catalyst
It preferably plays a role, is always the problem in urgent need to solve of PBT polyester production.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of polybutylene terephthalate (PBT) polyplant and catalysis
The adding method of agent overcomes partial catalyst meeting hydrolytic inactivation in esterification process in the prior art, polycondensation reaction stage is caused to have
It is less to imitate catalyst content, causes polycondensation reaction bad, pressure controls relatively low, the insufficient defect of vacuum surplus.
The technical scheme to solve the above technical problems is that polybutylene terephthalate (PBT) polyplant includes
Esterifying kettle and prepolymerization kettle, the esterifying kettle and prepolymerization kettle have been respectively communicated with catalyst addition pipeline, anti-in the middle part of the esterifying kettle
It should expect that outlet passes through the reaction material inlet communication in the middle part of conveyance conduit and prepolymerization kettle.
The beneficial effects of the present invention are: the present invention, which is respectively communicated with catalyst by esterifying kettle and prepolymerization kettle, adds pipeline, it can
Catalyst butyl titanate to be added stage by stage, the water that esterification reaction process generation can be effectively reduced causes catalyst hydrolysis to be lost
It is living, it can guarantee that polycondensation reaction well carries out by the way that catalyst butyl titanate is added again in polycondensation reaction stage, maintain to urge
The most highly active of agent reduces the loss of catalyst butyl titanate, reduces cost.
Based on the above technical solution, the present invention can also be improved as follows.
A kind of present invention polybutylene terephthalate (PBT) polyplant as described above, further, the catalyst addition
Pipeline is that esterification catalyst adds pipeline and prepolymerization catalyst adds pipeline, the esterification catalyst addition pipeline and the esterification
The feeding inlet at bottom end is connected to；Reaction material inlet communication in the middle part of the prepolymerization catalyst addition pipeline and the prepolymerization kettle.
A kind of present invention polybutylene terephthalate (PBT) polyplant as described above, further, the esterification catalyst
Addition pipeline and prepolymerization catalyst addition piping inlet connect catalyst transport general pipeline simultaneously, connect on the catalyst transport general pipeline
Connect catalyst pump.
A kind of present invention polybutylene terephthalate (PBT) polyplant as described above, further, the esterification catalyst
First flowmeter and the first regulating valve are sequentially connected along catalyst transport direction on addition pipeline.
The present invention a kind of polybutylene terephthalate (PBT) polyplant as described above, further, on the conveyance conduit
Connection esterification pump；The prepolymerization catalyst addition pipeline catalyst injection direction sets gradually second flowmeter, the second regulating valve
And injection valve, the injection valve are connected to the esterification pump discharge.
A kind of present invention polybutylene terephthalate (PBT) polyplant as described above, further, the prepolymerization kettle lower end
It is connected to prepolymer conveyance conduit, is connected with prepolymer delivery pump on the defeated pipeline of prepolymer.
The present invention also provides the adding method of catalyst in a kind of polymerization of polybutylene terephthalate (PBT), feature exists
In, including esterification reaction process and polycondensation reaction reaction process, the esterification reaction process and polycondensation reaction reaction process difference
Correspondence carries out in esterifying kettle and prepolymerization kettle, and catalyst butyl titanate is added in esterifying kettle and prepolymerization kettle step by step
The present invention as described above in a kind of polymerization of polybutylene terephthalate (PBT) catalyst adding method, further,
The mass ratio of the esterifying kettle and prepolymerization kettle addition catalyst is 4-5/1.
Detailed description of the invention
Fig. 1 is a kind of polybutylene terephthalate (PBT) polyplant structural schematic diagram of the present invention；
In attached drawing, parts list represented by the reference numerals are as follows:
1, catalyst pump, 2, first flowmeter, the 3, first regulating valve, 4, esterification pump, 5, the adjusting of second flowmeter 6, second
Valve 7, injection valve, 8, prepolymerization kettle, 9, prepolymer delivery pump, 10, esterifying kettle, 11, esterification catalyst addition pipeline；12, pre-polymerization is urged
Agent adds pipeline.
Specific embodiment
The principle and features of the present invention will be described below with reference to the accompanying drawings, and the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the invention.
As shown in Figure 1, polybutylene terephthalate (PBT) polyplant includes 10 He of esterifying kettle according to embodiments of the present invention
Prepolymerization kettle 8, esterifying kettle 10 and prepolymerization kettle 8 have been respectively communicated with catalyst addition pipeline, and the reaction material outlet at 10 middle part of esterifying kettle is logical
Cross the reaction material inlet communication at 8 middle part of conveyance conduit and prepolymerization kettle.Catalyst is respectively communicated with by esterifying kettle and prepolymerization kettle as a result,
Pipeline is added, the activity of catalyst can be efficiently used, the loss of catalyst butyl titanate is reduced, reduces cost.
According to embodiments of the present invention, catalyst addition pipeline is that esterification catalyst adds pipeline 11 and prepolymerization catalyst addition
Pipeline 12, esterification catalyst addition pipeline 11 are connected to the feeding inlet of 10 bottom end of esterifying kettle；Prepolymerization catalyst add pipeline 12 with
The reaction material inlet communication at 8 middle part of prepolymerization kettle.
In certain embodiments, esterification catalyst addition pipeline 11 and prepolymerization catalyst add 12 import of pipeline simultaneously
Catalyst transport general pipeline is connected, connects catalyst pump 1 on catalyst transport general pipeline；Esterification catalyst adds on pipeline 11 along catalysis
Agent conveying direction is sequentially connected first flowmeter 2 and the first regulating valve 3.
Specifically, connection esterification pump 4 on conveyance conduit；Prepolymerization catalyst addition 12 catalyst injection direction of pipeline is successively set
Set second flowmeter 5, the second regulating valve 6 and injection valve 7, the connection esterification pump discharge of injection valve 7；Prepolymerization kettle lower end is connected to prepolymer
Conveyance conduit is connected with prepolymer delivery pump 9 on the defeated pipeline of prepolymer.
Embodiment 1
The adding method of catalyst in polybutylene terephthalate (PBT) polymerization, including esterification reaction process and polycondensation reaction
Reaction process, esterification reaction process and polycondensation reaction reaction process are respectively corresponded to be carried out in esterifying kettle and prepolymerization kettle, will be catalyzed
Agent butyl titanate is added in esterifying kettle and prepolymerization kettle step by step；Esterifying kettle and prepolymerization kettle addition catalyst mass ratio be
4-5/1。
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (6)
1. a kind of polybutylene terephthalate (PBT) polyplant, which is characterized in that including esterifying kettle and prepolymerization kettle, the esterification
Kettle and prepolymerization kettle have been respectively communicated with catalyst addition pipeline, and the reaction material outlet in the middle part of the esterifying kettle is by conveyance conduit and in advance
Reaction material inlet communication in the middle part of poly- kettle.
2. a kind of polybutylene terephthalate (PBT) polyplant according to claim 1, which is characterized in that the catalyst
Adding pipeline is that esterification catalyst adds pipeline and prepolymerization catalyst and adds pipeline, the esterification catalyst addition pipeline with it is described
The feeding inlet of esterifying kettle bottom end is connected to；Reaction material import in the middle part of the prepolymerization catalyst addition pipeline and the prepolymerization kettle connects
It is logical.
3. a kind of polybutylene terephthalate (PBT) polyplant according to claim 2, which is characterized in that the esterification is urged
Agent addition pipeline and prepolymerization catalyst addition piping inlet connect catalyst transport general pipeline, the catalyst transport general pipeline simultaneously
Upper connection catalyst pump.
4. a kind of polybutylene terephthalate (PBT) polyplant according to claim 2, which is characterized in that the esterification is urged
First flowmeter and the first regulating valve are sequentially connected along catalyst transport direction on agent addition pipeline.
5. a kind of polybutylene terephthalate (PBT) polyplant according to claim 2, which is characterized in that the delivery pipe
Connection esterification pump on road；The prepolymerization catalyst addition pipeline catalyst injection direction sets gradually second flowmeter, the second tune
Valve and injection valve are saved, the injection valve is connected to the esterification pump discharge.
6. a kind of polybutylene terephthalate (PBT) polyplant according to claim 2, which is characterized in that the prepolymerization kettle
Lower end is connected to prepolymer conveyance conduit, is connected with prepolymer delivery pump on the defeated pipeline of prepolymer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910497578.5A CN110105557A (en) | 2019-06-10 | 2019-06-10 | The adding method of polybutylene terephthalate (PBT) polyplant and catalyst |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910497578.5A CN110105557A (en) | 2019-06-10 | 2019-06-10 | The adding method of polybutylene terephthalate (PBT) polyplant and catalyst |
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| CN110105557A true CN110105557A (en) | 2019-08-09 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1618832A (en) * | 2003-11-21 | 2005-05-25 | 中国石化上海石油化工股份有限公司 | Manufacturing method of low melting point polyester |
| CN101654511A (en) * | 2009-08-12 | 2010-02-24 | 吴江鹰翔万信化纤有限公司 | Stable method of polymerization and catalysis of polybutylene terephthalate |
| CN102504502A (en) * | 2011-11-16 | 2012-06-20 | 江苏和时利新材料股份有限公司 | Preparation process of PBT (polybutylece terephthalate) slice for optical cable tackification |
| CN108752576A (en) * | 2018-06-26 | 2018-11-06 | 南通皋强照明科技有限公司 | A kind of preparation method of thickening PBT slices for optical cable |
| CN210103806U (en) * | 2019-06-10 | 2020-02-21 | 河南开祥精细化工有限公司 | Polybutylene terephthalate polymerization device |
-
2019
- 2019-06-10 CN CN201910497578.5A patent/CN110105557A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1618832A (en) * | 2003-11-21 | 2005-05-25 | 中国石化上海石油化工股份有限公司 | Manufacturing method of low melting point polyester |
| CN101654511A (en) * | 2009-08-12 | 2010-02-24 | 吴江鹰翔万信化纤有限公司 | Stable method of polymerization and catalysis of polybutylene terephthalate |
| CN102504502A (en) * | 2011-11-16 | 2012-06-20 | 江苏和时利新材料股份有限公司 | Preparation process of PBT (polybutylece terephthalate) slice for optical cable tackification |
| CN108752576A (en) * | 2018-06-26 | 2018-11-06 | 南通皋强照明科技有限公司 | A kind of preparation method of thickening PBT slices for optical cable |
| CN210103806U (en) * | 2019-06-10 | 2020-02-21 | 河南开祥精细化工有限公司 | Polybutylene terephthalate polymerization device |
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