CN105037703A - Method for extracting formaldehyde and acetaldehyde from polyether polyol - Google Patents
Method for extracting formaldehyde and acetaldehyde from polyether polyol Download PDFInfo
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- CN105037703A CN105037703A CN201510543150.1A CN201510543150A CN105037703A CN 105037703 A CN105037703 A CN 105037703A CN 201510543150 A CN201510543150 A CN 201510543150A CN 105037703 A CN105037703 A CN 105037703A
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- polyether glycol
- acetaldehyde
- formaldehyde
- extracting
- polyether polyol
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Abstract
The invention discloses a method for extracting formaldehyde and acetaldehyde from polyether polyol. The method comprises the steps that vacuum extraction is performed on different technological conditions in two steps, and the content of the formaldehyde and the acetaldehyde in the polyether polyol is greatly decreased; steam is introduced at the temperature of 150-180 DEG C to be mixed with the polyether polyol, vacuumizing is performed for 2-5 h, and then nitrogen is introduced at the temperature of 120-150 DEG C to be mixed with the polyether polyol, and vacuumizing is performed for 2-5 h to obtain the polyether polyol from which the formaldehyde and the acetaldehyde are extracted. The obtained polyether polyol is low in formaldehyde and acetaldehyde content, stable in product quality and good in using performance.
Description
Technical field
The present invention relates to the preparation method belonging to organic high molecular compound, specifically a kind of method of formaldehyde and acetaldehyde in extracting polyurethane polyureas ethoxylated polyhydric alcohol.
Background technology
Polyether glycol is the important source material of polyurethane material, and polyurethane material has widespread use in the automotive industry.Because people more and more pay close attention to environment protection health, require that in automobile, smell is low, automobile polyurethane material prepared by common polyether has certain smell, be some aldehyde materials be after testing main, have influence on the health of occupant, therefore automobile manufacturing company requires to reduce formaldehyde and acetaldehyde in polyethers, and common polyether is difficult to reach requirement, and conventional vacuum extraction method can not formaldehyde in effective elimination polyethers and acetaldehyde.Especially the acetaldehyde in polyethers, is not only difficult to remove, and also can constantly generates in high temperature removal process, and the aldehyde therefore sometimes after vacuum extraction in polyethers rises on the contrary.
Summary of the invention
The object of this invention is to provide a kind of method of formaldehyde and acetaldehyde in extracting polyether glycol, the method can prepare the polyether product of relatively low aldehyde, reduce the content of aldehydes by product, the polyether glycol obtained can meet the requirement that polyurethane material is produced better.
The object of the invention is to be achieved through the following technical solutions:
A method for formaldehyde and acetaldehyde in extracting polyether glycol, is characterized in that: the method, by the vacuum extraction of two different process, reduces formaldehyde and acetaldehyde in polyether glycol, comprises the steps:
1) polyether glycol is added in reactor;
2) heat temperature raising, temperature controls to pass into water vapor at 150 ~ 180 DEG C and mixes with polyether glycol, vacuumizes 2 ~ 5 hours; The intake of water vapor is 1-3 cubic meters per minute by polyether glycol per ton.
3) then temperature controls to pass into nitrogen at 120 ~ 150 DEG C and mixes with polyether glycol, and the intake of nitrogen is 2-6 cubic meters per minute by polyether glycol per ton.Vacuumize 2 ~ 5 hours; Obtain the polyether glycol after extracting formaldehyde and acetaldehyde.
The present invention passes through the different processing condition vacuum extraction of two steps, the formaldehyde in polyether glycol and acetaldehyde is greatly reduced.At 150 ~ 180 DEG C, pass into water vapor mix with polyether glycol, vacuumize 2 ~ 5 hours, water vapor is extracted in process the acetaldehyde can efficiently taken out of in polyethers.Then control 120 ~ 150 DEG C to pass into nitrogen and mix with polyether glycol, vacuumize 2 ~ 5 hours, the acetaldehyde generated in polyethers is at this temperature few, and the formation speed of formaldehyde is far below extracting speed, finally obtains the polyether glycol after extracting formaldehyde and acetaldehyde.
Polyether glycol formaldehyde prepared by the present invention and acetaldehyde low, constant product quality, use properties is good.The polyether glycol obtained can meet the requirement that polyurethane material is produced better.Obtained polyether glycol aldehyde matter content has obvious reduction relative to common polyether aldehyde, is applied to automotive industry environment protecting good.
Embodiment
Below by specific embodiment, the present invention is further illustrated, but each embodiment is not all to concrete restriction of the present invention.
A method for formaldehyde and acetaldehyde in extracting polyether glycol, by the processing condition vacuum extraction that two steps are different, reduces greatly by the formaldehyde in polyether glycol and acetaldehyde.At 150 ~ 180 DEG C, pass into water vapor mix with polyether glycol, vacuumize 2 ~ 5 hours, water vapor is extracted in process the acetaldehyde can efficiently taken out of in polyethers.Then control 120 ~ 150 DEG C to pass into nitrogen and mix with polyether glycol, vacuumize 2 ~ 5 hours, the acetaldehyde generated in polyethers is at this temperature few, and the formation speed of formaldehyde is far below extracting speed, finally obtains the polyether glycol after extracting formaldehyde and acetaldehyde.
Example 1
400 molecular weight common polyether polyvalent alcohols are added in reactor.
Heat temperature raising, passes into water vapor at controlling 180 DEG C and mixes with polyether glycol, vacuumize 2 hours.The intake of water vapor is 1 cubic meters per minute by polyether glycol per ton.
Claims (3)
1. the method for formaldehyde and acetaldehyde in extracting polyether glycol, is characterized in that: the method, by the vacuum extraction of two different process, reduces formaldehyde and acetaldehyde in polyether glycol, comprises the steps:
1) polyether glycol is added in reactor;
2) heat temperature raising, temperature controls to pass into water vapor at 150 ~ 180 DEG C and mixes with polyether glycol, vacuumizes 2 ~ 5 hours;
3) then temperature controls to pass into nitrogen at 120 ~ 150 DEG C and mixes with polyether glycol, vacuumizes 2 ~ 5 hours; Obtain the polyether glycol after extracting formaldehyde and acetaldehyde.
2. the method for formaldehyde and acetaldehyde in extracting polyether glycol according to claim 1, it is characterized in that: at 180 DEG C, pass into water vapor mix with polyether glycol, vacuumize 2 hours, then control 150 DEG C to pass into nitrogen and mix with polyether glycol, vacuumize 5 hours, obtain the polyether glycol after extracting formaldehyde and acetaldehyde.
3. the method for formaldehyde and acetaldehyde in extracting polyether glycol according to claim 1, it is characterized in that: step 2) in, the intake of water vapor is 1-3 cubic meters per minute by polyether glycol per ton, and the intake of nitrogen is 2-6 cubic meters per minute by polyether glycol per ton.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510543150.1A CN105037703A (en) | 2015-08-31 | 2015-08-31 | Method for extracting formaldehyde and acetaldehyde from polyether polyol |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510543150.1A CN105037703A (en) | 2015-08-31 | 2015-08-31 | Method for extracting formaldehyde and acetaldehyde from polyether polyol |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105037703A true CN105037703A (en) | 2015-11-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510543150.1A Pending CN105037703A (en) | 2015-08-31 | 2015-08-31 | Method for extracting formaldehyde and acetaldehyde from polyether polyol |
Country Status (1)
| Country | Link |
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| CN (1) | CN105037703A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56104936A (en) * | 1980-01-24 | 1981-08-21 | Dai Ichi Kogyo Seiyaku Co Ltd | Purification of polyether polyol |
| CN1145372A (en) * | 1995-08-18 | 1997-03-19 | 拜尔公司 | Low-odor, higher molecular weight polyether polyols, process for producing them, and their use for production of polumers, cosmetics and pharmaceutial products synthesized from polyether polyols |
| CN1965014A (en) * | 2004-06-09 | 2007-05-16 | 国际壳牌研究有限公司 | Process of preparing odour-lean polyether polyol |
-
2015
- 2015-08-31 CN CN201510543150.1A patent/CN105037703A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56104936A (en) * | 1980-01-24 | 1981-08-21 | Dai Ichi Kogyo Seiyaku Co Ltd | Purification of polyether polyol |
| CN1145372A (en) * | 1995-08-18 | 1997-03-19 | 拜尔公司 | Low-odor, higher molecular weight polyether polyols, process for producing them, and their use for production of polumers, cosmetics and pharmaceutial products synthesized from polyether polyols |
| CN1965014A (en) * | 2004-06-09 | 2007-05-16 | 国际壳牌研究有限公司 | Process of preparing odour-lean polyether polyol |
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| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 212405 Jurong City, Zhenjiang Province, the town side of the road Yang Zhuangduan Chen sentence Applicant after: Jurong Ningwu New Material Co., Ltd. Address before: 212400 Zhenjiang City, Jurong Province, Jiangsu Town Road sentence Yang Zhuangduan Applicant before: Jurong Ningwu New Material Development Co., Ltd. |
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151111 |