CN110483759A - A kind of preparation method of low VOC polyether polyol - Google Patents
A kind of preparation method of low VOC polyether polyol Download PDFInfo
- Publication number
- CN110483759A CN110483759A CN201910879795.0A CN201910879795A CN110483759A CN 110483759 A CN110483759 A CN 110483759A CN 201910879795 A CN201910879795 A CN 201910879795A CN 110483759 A CN110483759 A CN 110483759A
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- CN
- China
- Prior art keywords
- polyether polyol
- ethylene oxide
- initiator
- preparation
- low voc
- 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
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
- C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
- C08G65/26—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers and other compounds
- C08G65/2603—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers and other compounds the other compounds containing oxygen
- C08G65/2606—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers and other compounds the other compounds containing oxygen containing hydroxyl groups
- C08G65/2609—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers and other compounds the other compounds containing oxygen containing hydroxyl groups containing aliphatic hydroxyl groups
-
- 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
- C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
- C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
- C08G65/26—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers and other compounds
- C08G65/2696—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers and other compounds characterised by the process or 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
- C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
- C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
- C08G65/30—Post-polymerisation treatment, e.g. recovery, purification, drying
Abstract
The invention discloses a kind of low VOC polyether polyol preparation methods, include the following steps: 1) to be uniformly mixed low molecule weight initiator and initiator, and reaction solution is made；2) reaction solution is continuously injected into reaction system while is continuously injected into propylene oxide and ethylene oxide reacts, crude polyether polyalcohol is made；3) product of step 2) is passed through into removing tank, inert gas is passed through under high vacuum state, the small-molecule substances such as the propylene oxide of vaporization, ethylene oxide are removed, multistage cooler through being arranged in vacuum system cools down gas phase, the propylene oxide of vaporization, ethylene oxide are condensed into liquid, are recycled to recycling can.The present invention produces polymer polyatomic alcohol using continuous process, not only greatly improves product service performance, and has more preferable mechanical property, reduces density, can also reduce use cost.Meanwhile the three wastes are greatly decreased, integrated artistic is handled using cycling and reutilization, has been accomplished clean manufacturing requirement, has been reduced the influence to environment.
Description
Technical field
The invention belongs to polyether polyol technical fields, and in particular to a kind of preparation method of low VOC polyether polyol.
Background technique
It is the important source material of polyurethane industrial that polyether polyols are pure and mild, and the foamed plastics of polyurethane production is widely used in electricity
The fields such as son, electric appliance, building, automobile, packing business, furniture, shoemaking, sealant, heat preservation, refrigeration.Since polyethers industry is entered a profession door
Sill are lower, and the extension of polyethers production capacity is exceedingly fast, and there are problems that serious supply surplus.
And polyether polyols are mostly produced using traditional KOH technology, DMC base batch process technology currently on the market
Alcohol.But mostly there is viscosity height, the low problem of conversion ratio, resulting product using the polyether polyol that the above method produces
Poor fluidity, monomer residue is big, and yield is low, and three waste discharge is also more serious.Energy consumption is also high simultaneously.Therefore, a kind of low VOC is researched and developed
The preparation method of polyether polyol, not only can be to avoid KOH technology traditional in polyethers production, DMC base batch process
Technology and products thereof mass defect can continuously, smoothly carry out the production of polyether polyol, and the polyether polyol prepared is residual
Single content is low.
Summary of the invention
The present invention is directed to missing of the existing technology, and its object is to propose a kind of preparation of low VOC polyether polyol
Method.
To achieve the above object, the present invention adopts the following technical scheme:
Technical solution of the present invention is as follows: a kind of preparation method of low VOC polyether polyol specifically comprises the following steps:
1) low molecule weight initiator and initiator are uniformly mixed at normal temperature, reaction solution is made；
2) reaction solution is continuously injected into reaction system and is reacted, then is simultaneously that propylene oxide and ethylene oxide is continuous
It injects in reaction system, reaction system temperature rises to 105~135 DEG C, and crude polyether polyalcohol is made；
3) product of step 2) is passed through inert gas under the high vacuum state of removing tank, will be vaporized by removing tank
The small-molecule substances such as propylene oxide, ethylene oxide removed, then the multistage cooler through being arranged in vacuum system is by gas phase
It is cooled down, the propylene oxide of vaporization, ethylene oxide is condensed into liquid, are recycled to recycling can.
Preferably, low molecule weight initiator main component described in the step 1) be low molecular weight polyether polyol or
Glycerol, propylene glycol.
Preferably, initiator described in the step 1) is bimetallic initiator.
Preferably, removing tank vacuum pressure described in the step 3) be -0.093~-0.098MPa, temperature be 110~
130 DEG C, liquid level is 40%~60%.
As can be seen from the above description, the present invention compared with prior art, present invention has the advantage that:
1, the present invention produces polymer polyatomic alcohol using continuous process, and compared to traditional batch process, yield is reachable
To 99.5% or more, it is higher by 1% or so, and the residuum residual quantity of product can drop to 15PPm hereinafter, other low-boiling-point substances contain
Amount declines to a great extent, and the soft bubble such as antidetonation energy-absorbing and the foamed material products of semihard and the quality such as micro-pore elastomer and adhesive is suitble to want
It asks；
2, continuous process of the present invention produces polymer polyatomic alcohol, and since the residence time is short, the molecular weight distribution of product is more
It is narrow, therefore viscosity is lower, greatly improves the service performance of product, has more preferable mechanical property, reduces density, can also reduce
Use cost；
3, three waste discharge problem is greatly decreased in the present invention, and integrated artistic is handled using cycling and reutilization, has accomplished cleaning life
It produces and requires, reduce the influence to environment.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
A kind of preparation method of low VOC polyether polyol, which is characterized in that specifically comprise the following steps:
1) low molecule weight initiator and initiator are uniformly mixed at normal temperature, reaction solution is made；
2) reaction solution is continuously injected into reaction system and is reacted, then is simultaneously that propylene oxide and ethylene oxide is continuous
It injects in reaction system, reaction system temperature rises to 105~135 DEG C, and crude polyether polyalcohol is made；
3) product of step 2) is passed through inert gas under the high vacuum state of removing tank, will be vaporized by removing tank
The small-molecule substances such as propylene oxide, ethylene oxide removed, then the multistage cooler through being arranged in vacuum system is by gas phase
It is cooled down, the propylene oxide of vaporization, ethylene oxide is condensed into liquid, are recycled to recycling can.
Preferably, low molecule weight initiator main component described in the step 1) be low molecular weight polyether polyol or
Glycerol, propylene glycol.
Preferably, initiator described in the step 1) is bimetallic initiator.
Preferably, removing tank vacuum pressure described in the step 3) be -0.093~-0.098MPa, temperature be 110~
130 DEG C, liquid level is 40%~60%.
Polymer polyatomic alcohol is produced using continuous process, since the residence time is short, the molecular weight distribution of product is narrower, because
This viscosity is lower, greatly improves the service performance of product, has more preferable mechanical property, reduces density, can also reduce use
Cost.Meanwhile the three wastes are greatly decreased, integrated artistic is handled using cycling and reutilization, has accomplished clean manufacturing requirement, is reduced pair
The influence of environment.
Table 1 is viscosity, propylene oxide content, ethylene oxide content and the total aldehyde measurement result of polyether polyol
Table 2 is viscosity, propylene oxide content, ethylene oxide content and the total aldehyde measurement result of polyether polyol
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should be included within the protection scope of invention.
Claims (4)
1. a kind of preparation method of low VOC polyether polyol, which is characterized in that specifically comprise the following steps:
1) low molecule weight initiator and initiator are uniformly mixed at normal temperature, reaction solution is made；
2) reaction solution is continuously injected into reaction system and is reacted, then be simultaneously continuously injected into propylene oxide and ethylene oxide
In reaction system, reaction system temperature rises to 105~135 DEG C, and crude polyether polyalcohol is made；
3) product of step 2) is passed through inert gas under the high vacuum state of removing tank, by the ring of vaporization by removing tank
The small-molecule substances such as Ethylene Oxide, ethylene oxide are removed, then the multistage cooler through being arranged in vacuum system carries out gas phase
It is cooling, the propylene oxide of vaporization, ethylene oxide are condensed into liquid, are recycled to recycling can.
2. a kind of preparation method of low VOC polyether polyol according to claim 1, it is characterised in that: the step 1)
The low molecule weight initiator main component is the polyether polyol or glycerol, propylene glycol of low molecular weight.
3. a kind of preparation method of low VOC polyether polyol according to claim 1, it is characterised in that: the step 1)
The initiator is bimetallic initiator.
4. a kind of preparation method of low VOC polyether polyol according to claim 1, it is characterised in that: the step 3)
The removing tank vacuum pressure is -0.093~-0.098MPa, and temperature is 110~130 DEG C, and liquid level is 40%~60%.
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| CN201910879795.0A CN110483759A (en) | 2019-09-18 | 2019-09-18 | A kind of preparation method of low VOC polyether polyol |
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| CN201910879795.0A CN110483759A (en) | 2019-09-18 | 2019-09-18 | A kind of preparation method of low VOC polyether polyol |
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| CN110483759A true CN110483759A (en) | 2019-11-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111303375A (en) * | 2020-02-14 | 2020-06-19 | 山东轻工职业学院 | Preparation method of environment-friendly flame-retardant polyurethane artware |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5900384A (en) * | 1996-07-18 | 1999-05-04 | Arco Chemical Technology L.P. | Double metal cyanide catalysts |
| CN101121786A (en) * | 2007-08-07 | 2008-02-13 | 江苏钟山化工有限公司 | Continuous preparation method for polyether glycol |
| CN104130389A (en) * | 2014-08-06 | 2014-11-05 | 山东蓝星东大化工有限责任公司 | Method for reducing VOC (volatile organic compound) content of polyether polyol |
| CN105037704A (en) * | 2015-08-31 | 2015-11-11 | 句容宁武新材料发展有限公司 | Method for removing low-boiling-point substance in polyether |
| CN105080167A (en) * | 2015-08-31 | 2015-11-25 | 句容宁武新材料发展有限公司 | Combining device for removing low-boiling substance of polyether |
-
2019
- 2019-09-18 CN CN201910879795.0A patent/CN110483759A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5900384A (en) * | 1996-07-18 | 1999-05-04 | Arco Chemical Technology L.P. | Double metal cyanide catalysts |
| CN101121786A (en) * | 2007-08-07 | 2008-02-13 | 江苏钟山化工有限公司 | Continuous preparation method for polyether glycol |
| CN104130389A (en) * | 2014-08-06 | 2014-11-05 | 山东蓝星东大化工有限责任公司 | Method for reducing VOC (volatile organic compound) content of polyether polyol |
| CN105037704A (en) * | 2015-08-31 | 2015-11-11 | 句容宁武新材料发展有限公司 | Method for removing low-boiling-point substance in polyether |
| CN105080167A (en) * | 2015-08-31 | 2015-11-25 | 句容宁武新材料发展有限公司 | Combining device for removing low-boiling substance of polyether |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111303375A (en) * | 2020-02-14 | 2020-06-19 | 山东轻工职业学院 | Preparation method of environment-friendly flame-retardant polyurethane artware |
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Application publication date: 20191122 |
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