CN202829901U - Device for rapidly synthesizing polyester polyol at low pressure - Google Patents
Device for rapidly synthesizing polyester polyol at low pressure Download PDFInfo
- Publication number
- CN202829901U CN202829901U CN2012205271947U CN201220527194U CN202829901U CN 202829901 U CN202829901 U CN 202829901U CN 2012205271947 U CN2012205271947 U CN 2012205271947U CN 201220527194 U CN201220527194 U CN 201220527194U CN 202829901 U CN202829901 U CN 202829901U
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- Prior art keywords
- pressure
- reaction
- low pressure
- polyester polyol
- synthesizing polyester
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Abstract
The utility model relates to a device for rapidly synthesizing polyester polyol at low pressure. The device comprises a high-pressure reaction kettle of which the top is externally connected with a pressure reducing valve; and a pipeline through which the pressure reducing valve is connected with a condensate receiver is provided with a condenser. Without changing in proportioning of original fed materials, the reaction rate of esterification is enhanced greatly by compression and gas phase components such as system moisture are removed by decompression. When pressure is too high, decompression is carried out automatically, so that the system pressure is kept and the proceeding of reaction is promoted on the one hand; and on the other hand, moisture and the like generated by reaction are removed by the pressure and the temperature in the kettle and then the reaction is promoted to proceed positively. Therefore the acid value of a product can be reduced to smaller than 7mgKOH/g after only a reaction time which is shorter than four hours, the reaction rate is improved, the content of harmful substance in a by-product water is effectively lowered.
Description
Technical field
The utility model relates to a kind of device that adopts pressurized vessel synthesizing polyester polyvalent alcohol, belongs to the polyester polyol synthesis technical field.
Background technology
As everyone knows, polyurethane foamed material is to develop one of the most a kind of product in the plastics industry, because of its thermal insulation good, and the performances such as electrical isolation, acoustics insulation, resistance to chemical attack are also very superior, and easy construction, so use as thermal insulation material or structured material in the fields such as the petrochemical industry of being widely used in, building, household electrical appliances, vehicle, machinery instrument, aviation.And topmost raw material is exactly polyester polyol in the polyurethane material, this polyester polyol that contains phenyl ring is wherein compared and polyethers because having introduced phenyl ring, greatly improved the hardness of urethane resin, make Structural Foaming Adhesive have the over-all propertieies such as stiffness, flame retardant resistance and chemicals-resistant, formed Structural Foaming Adhesive ability limiting ambient temperature changes, is difficult for aging, and shrinking percentage is low, structure is stable, and foam is evenly fine and smooth.But currently used device, the reaction times is long, and energy consumption is high, has consumed a large amount of human and material resources.
Summary of the invention
For the synthesis technique length consuming time that solves the prior art existence, the shortcoming that energy consumption is high, the utility model provides a kind of device for the quick synthesizing polyester polyvalent alcohol of low pressure, adopt synthesizing polyester polyvalent alcohol under the pressurized vessel low pressure, reaction times is short, step is simple, need not change other conditions such as existing reaction ratio.
The technical solution of the utility model is: a kind of device for the quick synthesizing polyester polyvalent alcohol of low pressure, comprise reactor, described reactor is autoclave, the external reducing valve in autoclave top, and reducing valve is provided with condenser with the pipeline that the phlegma receiver is connected.
Be provided with whipping appts in the described autoclave.
Beneficial effect:
The utility model adopts the quick synthesizing polyester polyvalent alcohol of low pressure, the shortening time, reduces energy consumption.Only need lower pressure, and the objectionable impurities in the water byproduct reduces obviously.
Description of drawings
Fig. 1 process diagram; Wherein 1 is autoclave, and 2 is pressure release valve, and 3 is condenser, and 4 is the phlegma receiver.
Embodiment
Be described as follows by reference to the accompanying drawings.
As shown in Figure 1, a kind of method that adopts pressurized vessel synthesizing polyester polyvalent alcohol.The utility model need not to change the proportioning that originally fed intake and the catalyzer of use, in proportion pure acid starting material and catalyzer etc. is dropped in the autoclave 1, and stirs and be warming up to 190 ℃～250 ℃.Because pressure can constantly raise in the reaction, remain on＜0.5MPa pressure by pressure release valve this moment, and just by pressure release valve 2 releasing pressure automaticallies, one keeps system pressure when hypertonia, promotes reaction to carry out; Two come to get rid of steam that reaction generates etc. by still internal pressure and temperature, impel reaction to carry out to positive dirction.Steam etc. are cooled off by condenser 3 and are stored in the phlegma receiver 4.React＜4 hours product acid values and can be down to＜7mgKOH/g, product in the autoclave 1 is carried out further refinement treatment can obtain qualified polyester polyol.
Described raw material benzoic acid is terephthalic acid, phthalic acid, Tetra hydro Phthalic anhydride and lands material, pond material, pipeline material etc.
Described alcohol is any one or more preparation in glycol ether, ethylene glycol, glycerol, the tetramethylolmethane etc. conventional alcohol that uses during polyester polyol.
Described catalyzer is the conventional polyester polyols alcohol catalyst that uses.
Embodiment 1:
Raw material: terephthalic acid, glycol ether, glycerine, catalyzer;
Be that glycol ether, glycerine and the terephthalic acid of 1 ︰, 0.2 ︰ 1 drops into reactor with mol ratio, and add the catalyst oxidation zinc of 0.2%wt, heated and stirred, pressurize reaction.When temperature reaches 250 ℃, by the pressure release of pressure control device automatic vent, keep pressure at 0.3MPa.When reacting to acid value＜7mgKOH/g, be cooled to 180 ℃, and the intensification decompression dehydration gets final product to acid value＜1mgKOH/g.
Phlegma composition contrast among the embodiment
| ? | Propenal | Vinylcarbinol | Acetic acid | The 1-pyruvic alcohol | Dioxan | Propione | Acetaldehyde |
| Non-pressure process polyvalent alcohol waste water | 9%wt | 3.55%wt | 4.6%wt | 9.5%wt | 45.5%wt | 10.29%wt | Nothing |
| Water of condensation of the present utility model | 1.2%wt | 0.45%wt | 0.37%wt | 0.29%wt | 63%wt | Nothing | 3.2%wt |
Claims (2)
1. device that is used for the quick synthesizing polyester polyvalent alcohol of low pressure, comprise reactor, it is characterized in that, described reactor is autoclave (1), the external reducing valve in autoclave (1) top (2), reducing valve (2) is connected 4 with the phlegma receiver) pipeline that connects is provided with condenser (3).
2. the device for the quick synthesizing polyester polyvalent alcohol of low pressure according to claim 1 is characterized in that, described autoclave is provided with whipping appts in (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205271947U CN202829901U (en) | 2012-10-16 | 2012-10-16 | Device for rapidly synthesizing polyester polyol at low pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205271947U CN202829901U (en) | 2012-10-16 | 2012-10-16 | Device for rapidly synthesizing polyester polyol at low pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202829901U true CN202829901U (en) | 2013-03-27 |
Family
ID=47941656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012205271947U Expired - Lifetime CN202829901U (en) | 2012-10-16 | 2012-10-16 | Device for rapidly synthesizing polyester polyol at low pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202829901U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103319346A (en) * | 2013-05-24 | 2013-09-25 | 中国林业科学研究院林产化学工业研究所 | Method and device for synthesizing plasticizer by regulating pressure |
| CN107875669A (en) * | 2017-12-26 | 2018-04-06 | 安徽红星药业股份有限公司 | Solvent recovery unit |
-
2012
- 2012-10-16 CN CN2012205271947U patent/CN202829901U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103319346A (en) * | 2013-05-24 | 2013-09-25 | 中国林业科学研究院林产化学工业研究所 | Method and device for synthesizing plasticizer by regulating pressure |
| CN107875669A (en) * | 2017-12-26 | 2018-04-06 | 安徽红星药业股份有限公司 | Solvent recovery unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130327 |