CN203610127U - Nitrogen delivery device for polyester polyol synthesis - Google Patents
Nitrogen delivery device for polyester polyol synthesis Download PDFInfo
- Publication number
- CN203610127U CN203610127U CN201320694810.2U CN201320694810U CN203610127U CN 203610127 U CN203610127 U CN 203610127U CN 201320694810 U CN201320694810 U CN 201320694810U CN 203610127 U CN203610127 U CN 203610127U
- Authority
- CN
- China
- Prior art keywords
- nitrogen
- metal tube
- flask
- check valve
- pepa
- 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.)
- Expired - Lifetime
Links
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 81
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 36
- 230000015572 biosynthetic process Effects 0.000 title abstract description 3
- 238000003786 synthesis reaction Methods 0.000 title abstract description 3
- 229920005906 polyester polyol Polymers 0.000 title abstract 2
- 239000002184 metal Substances 0.000 claims abstract description 23
- 229910052751 metal Inorganic materials 0.000 claims abstract description 23
- 239000007789 gas Substances 0.000 claims abstract description 5
- GTACSIONMHMRPD-UHFFFAOYSA-N 2-[4-[2-(benzenesulfonamido)ethylsulfanyl]-2,6-difluorophenoxy]acetamide Chemical compound C1=C(F)C(OCC(=O)N)=C(F)C=C1SCCNS(=O)(=O)C1=CC=CC=C1 GTACSIONMHMRPD-UHFFFAOYSA-N 0.000 claims description 13
- 101710130081 Aspergillopepsin-1 Proteins 0.000 claims description 13
- 102100031007 Cytosolic non-specific dipeptidase Human genes 0.000 claims description 13
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 9
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 3
- 239000012295 chemical reaction liquid Substances 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 3
- 239000007795 chemical reaction product Substances 0.000 description 2
- 101100298225 Caenorhabditis elegans pot-2 gene Proteins 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Images
Abstract
The utility model relates to the technical field of chemical equipment, particularly to a nitrogen delivery device for polyester polyol synthesis. The device comprises a flask, a nitrogen tank and a metal tube, wherein the nitrogen tank is used for storing nitrogen; one end of the metal tube is inserted into the flask, and a check valve and a nitrogen pressure reducing valve are connected sequentially between the other end of the metal tube and an outlet end of the nitrogen tank through pipelines. The metal tube is inserted into the flask, and the outlet end of the metal tube is located below the liquid level in the flask, so that the nitrogen is prevented from being contacted with the air; the nitrogen in the nitrogen tank enters the pipelines through pressure reduction of the nitrogen pressure reducing valve, then enters the metal tube through the check valve and finally enters the flask through the metal tube; the check valve is arranged, so that a reaction liquid or a product cannot flow backward into the pipelines to block a gas flow meter, the nitrogen can be protected fully, and normal conduction of experiments can be guaranteed.
Description
Technical field
The utility model relates to technical field of chemical, is specifically related to a kind of for the synthetic nitrogen gas conveying device of PEPA.
Background technology
PEPA is one of important source material of synthesis of polyurethane goods, and it is with polyacid and polyol reaction, the final compound with hydroxy-end capped chain structure.Because the price of commercially available stainless steel PEPA reaction unit is relatively high; the reaction of PEPA simultaneously is generally carried out under normal pressure; therefore; laboratory often adopts the reaction unit of cheap glass flask as PEPA; but in flask, often there will be the phenomenon that builds the pressure in experiment; cause reaction liquid or product to be poured in down a chimney in nitrogen pot, can not make nitrogen play sufficient protective effect, finally have influence on the carrying out of experiment.
Utility model content
For above-mentioned technical problem, it is a kind of for the synthetic nitrogen gas conveying device of PEPA that the utility model provides, and it can effectively prevent from pouring in down a chimney phenomenon, and nitrogen is played a protective role, and guarantees normally carrying out of experiment.
Realize the technical solution of the utility model as follows:
For the synthetic nitrogen gas conveying device of PEPA, comprise flask, for storing the nitrogen pot of nitrogen, and one end inserts the metal tube in flask, between the other end of metal tube and the port of export of nitrogen pot, be connected with check valve, nitrogen pressure-reducing valve by pipeline successively.
After described metal tube inserts in flask, between outer wall and flask socket, adopt high temperature resistant solvent plug to seal, guarantee the sealing between metal tube and flask with this.
Described metal tube is copper pipe or stainless steel tube.
On pipeline between described check valve and nitrogen pressure-reducing valve, be provided with gas flowmeter.
Adopted such scheme, metal tube inserts in flask, and its port of export below liquid level, avoids nitrogen to contact with air in flask; Nitrogen in nitrogen pot enters in pipeline by the decompression of nitrogen pressure-reducing valve; enter metal tube by check valve again; finally entered in flask by metal tube; owing to being provided with check valve; reaction liquid or product just can not be poured in down a chimney in pipeline like this; stop up gas flowmeter, thereby can play sufficient protective effect to nitrogen, guarantee normally carrying out of experiment.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is further illustrated.
Referring to Fig. 1, for the synthetic nitrogen gas conveying device of PEPA, comprise flask 1, for storing the nitrogen pot 2 of nitrogen, and one end inserts the metal tube 3 in flask, between the other end of metal tube and the port of export of nitrogen pot, is connected with check valve 4, nitrogen pressure-reducing valve 5 successively by pipeline.After inserting in flask, metal tube adopt high temperature resistant solvent plug 6 to seal between outer wall and flask socket.On pipeline between check valve and nitrogen pressure-reducing valve, be provided with gas flowmeter 7, the dosage of discharging from nitrogen pot for Real-Time Monitoring; In concrete enforcement, metal tube is copper pipe or stainless steel tube.
Claims (4)
1. for the synthetic nitrogen gas conveying device of PEPA, it is characterized in that, comprise flask, for storing the nitrogen pot of nitrogen, and one end inserts the metal tube in flask, between the other end of metal tube and the port of export of nitrogen pot, is connected with check valve, nitrogen pressure-reducing valve successively by pipeline.
2. according to claim 1ly it is characterized in that for the synthetic nitrogen gas conveying device of PEPA, after described metal tube inserts in flask, between outer wall and flask socket, adopt high temperature resistant solvent plug to seal.
3. according to claim 1 and 2ly it is characterized in that for the synthetic nitrogen gas conveying device of PEPA, described metal tube is copper pipe or stainless steel tube.
4. according to claim 1 and 2ly it is characterized in that for the synthetic nitrogen gas conveying device of PEPA, on the pipeline between described check valve and nitrogen pressure-reducing valve, be provided with gas flowmeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320694810.2U CN203610127U (en) | 2013-11-06 | 2013-11-06 | Nitrogen delivery device for polyester polyol synthesis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320694810.2U CN203610127U (en) | 2013-11-06 | 2013-11-06 | Nitrogen delivery device for polyester polyol synthesis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203610127U true CN203610127U (en) | 2014-05-28 |
Family
ID=50762808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320694810.2U Expired - Lifetime CN203610127U (en) | 2013-11-06 | 2013-11-06 | Nitrogen delivery device for polyester polyol synthesis |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203610127U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110586014A (en) * | 2019-10-11 | 2019-12-20 | 安徽神剑新材料股份有限公司 | Bottom nitrogen controller in cauldron |
-
2013
- 2013-11-06 CN CN201320694810.2U patent/CN203610127U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110586014A (en) * | 2019-10-11 | 2019-12-20 | 安徽神剑新材料股份有限公司 | Bottom nitrogen controller in cauldron |
| CN110586014B (en) * | 2019-10-11 | 2023-11-17 | 安徽神剑新材料股份有限公司 | Nitrogen controller at bottom of kettle |
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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: 20140528 |