CN202181270U - Device for rectifying and purifying m-nitrotoluene coarse products - Google Patents
Device for rectifying and purifying m-nitrotoluene coarse products Download PDFInfo
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- CN202181270U CN202181270U CN2011203095787U CN201120309578U CN202181270U CN 202181270 U CN202181270 U CN 202181270U CN 2011203095787 U CN2011203095787 U CN 2011203095787U CN 201120309578 U CN201120309578 U CN 201120309578U CN 202181270 U CN202181270 U CN 202181270U
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- nitrotoluene
- meta
- pump
- rectifying tower
- liquid
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The utility model discloses a device for rectifying and purifying m-nitrotoluene coarse products; the lower end of a rectifying column (2) is connected with a reboiler (1), the upper end of the rectifying column (2) is connected with a condenser (3), and the condenser (3) is connected with a material tank (9) through a return tank (4), a gas-liquid separator (5), a vacuum trap (6), a Roots vacuum pump (7) and a liquid ring type vacuum pump (8), the material tank (9) is connected with the rectifying column (2) by a material pump (10). The device is simple, convenient and safe to operate, has high vacuum degree, remarkably reduces the distilling temperature, effectively improves the separation efficiency, ensures the m-nitrotoluene product quality, reduces abrasion and high-temperature dangers of a high vacuum unit and reduces environment pollution.
Description
Technical field
The utility model relates to the caloic switching technology field of chemical substance, is specifically related to be used for the device of meta-nitrotoluene bullion rectification and purification.
Background technology
The purposes of meta-nitrotoluene is narrower.Mainly behind hydrogenating reduction, obtain the meta-aminotoluene product at present, and meta-aminotoluene is mainly used in the high-grade dyestuff of preparation, color developer, highly purified especially meta-aminotoluene is the raw material that the vitamin E building-up process can not lack suddenly.The purposes of this product has been opened up in the preparation of high purity meta-nitrotoluene.The enterprise of present production high purity meta-nitrotoluene, process for separating and purifying is traditional vacuum distillation method, and this method adopts W5 vacuum pump or sliding vane rotary vacuum pump and horizontal still kettle.W type vacuum pump main drawback is that vacuum tightness is low, and separating difficulty is big, as improving temperature; Dangerous again for this nitro-compound; Particularly this mechanical system is because the valve friction causes high temperature, and uncooled organism not only makes the frequent coking of valve after getting into, and also can cause security incident; Though sliding vane rotary vacuum pump vacuum tightness can reach requirement, also, cause oil pollution because of the oil ring system of a small amount of uncooled aqueous vapor and organic gas suction high vacuum, have a strong impact on the work-ing life of vacuum tightness and pump, often changing oil has also increased running cost.And the heat transfer efficiency of horizontal still kettle is lower, and is undesirable for the distillation of heat-sensitive substance.
Summary of the invention
The purpose of the utility model is: overcomes the deficiency of prior art, a kind of device that is used for meta-nitrotoluene bullion rectification and purification is provided, and simple in structure; Simple and safe operation, vacuum tightness is high, can obviously reduce distillation temperature; Effectively improve distillation yield; Improve the meta-nitrotoluene quality product, reduce the wearing and tearing of vacuum unit, prevent environmental pollution.
The utility model has adopted following technical solution: this device comprises reboiler, rectifying tower, condensing surface, return tank, vapour liquid separator, vacuum trap, Roots vaccum pump, liquid-ring vacuum pump and batch can; The lower end of rectifying tower connects reboiler; The upper end of rectifying tower connects condensing surface; Condensing surface connects batch can through return tank, vapour liquid separator, vacuum trap, Roots vaccum pump, liquid-ring vacuum pump, and batch can connects rectifying tower through the material pump.
Wherein, reboiler is the falling film type reboiler.
Wherein, rectifying tower is efficient wire packing tower.
Wherein, efficient wire packing is copper wire gauze, Stainless Steel Cloth or wire netting, preferred galvanized wire mesh or black wire net.
Wherein, the circulation fluid of liquid-ring vacuum pump is a liquid stock, preferred thick meta-nitrotoluene.
During work, the meta-nitrotoluene bullion is pumped in the rectifying tower through the material pump from hopper, after liquid level reaches the processing requirement position; Open liquid-ring vacuum pump earlier, open Roots vaccum pump after the vacuum tightness according with process requirements again, make the vacuum tightness of total system reach 0.094～0.098MPa; Slowly make reboiler be warming up to tower still temperature again and reach 170～180 ℃; Make the filling surface of meta-nitrotoluene steam in rectifying tower carry out the caloic exchange, the cooling system of open cold condenser keeps certain reflux temperature and quantity of reflux; Continuously charging is by the qualified product of return tank extraction.
The utlity model has following advantage:
1, adopt the falling film type reboiler, the mobile liquid film strengthens heat transfer coefficient, can effectively shorten the residence time of heat-sensitive material in well heater, has improved distillation efficiency and quality product.
2, adopt efficient wire packing rectifying tower, film forming properties is good, effectively compartment nitrotoluene and other impurity composition.
3, form the high vacuum unit by Roots vaccum pump and liquid-ring vacuum pump and carry out the rough vacuum distillation, the still kettle temperature is significantly reduced, security of system is reliable.
4, the circulation fluid in the liquid-ring vacuum pump is a bullion meta-nitrotoluene raw material, and the proportion of this raw material is greater than water, and not only vacuum tightness is high, uncooled organism is dissolved in again obtains in the raw material reclaiming, and reduces the pollution to environment, and reduction manufactures a finished product.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Among the figure: 1 reboiler, 2 rectifying tower, 3 condensing surfaces, 4 return tanks, 5 vapour liquid separators, 6 vacuum traps, 7 Roots vaccum pumps, 8 liquid-ring vacuum pumps, 9 batch cans, 10 batch cans.
Embodiment
Further specify the technical solution of the utility model below in conjunction with accompanying drawing.
As shown in Figure 1; This device comprises reboiler 1, rectifying tower 2, condensing surface 3, return tank 4, vapour liquid separator 5, vacuum trap 6, Roots vaccum pump 7, liquid-ring vacuum pump 8 and batch can 9; The lower end of rectifying tower 2 connects reboiler 1; The upper end of rectifying tower 2 connects condensing surface 3, and condensing surface 3 connects batch can 9 through return tank 4, vapour liquid separator 5, vacuum trap 6, Roots vaccum pump 7, liquid-ring vacuum pump 8, and batch can 9 connects rectifying tower 2 through material pump 10.
Wherein, reboiler 1 is the falling film type reboiler.
Wherein, rectifying tower 2 is efficient wire packing towers.
Wherein, efficient wire packing is copper wire gauze, Stainless Steel Cloth or wire netting, preferred galvanized wire mesh or black wire net.
Wherein, the circulation fluid of liquid-ring vacuum pump 8 is a liquid stock, preferred thick meta-nitrotoluene.
During work, the meta-nitrotoluene bullion is pumped in the rectifying tower 2 through material pump 10 from hopper 9, after liquid level reaches the processing requirement position; Open liquid-ring vacuum pump 8 earlier, open Roots vaccum pump 7 after the vacuum tightness according with process requirements again, make the vacuum tightness of total system reach 0.094～0.098MPa; Slowly make reboiler 1 be warming up to tower still temperature again and reach 170～180 ℃; Make the filling surface of meta-nitrotoluene steam in rectifying tower 2 carry out the caloic exchange, the cooling system of open cold condenser 3 keeps certain reflux temperature and quantity of reflux; Continuously charging is by the qualified product of return tank 4 extraction.
Claims (5)
1. the device that is used for meta-nitrotoluene bullion rectification and purification; It is characterized in that: this device comprises reboiler (1), rectifying tower (2), condensing surface (3), return tank (4), vapour liquid separator (5), vacuum trap (6), Roots vaccum pump (7), liquid-ring vacuum pump (8) and batch can (9); The lower end of rectifying tower (2) connects reboiler (1); The upper end of rectifying tower (2) connects condensing surface (3); Condensing surface (3) connects batch can (9) through return tank (4), vapour liquid separator (5), vacuum trap (6), Roots vaccum pump (7), liquid-ring vacuum pump (8), and batch can (9) connects rectifying tower (2) through material pump (10).
2. according to the described device that is used for meta-nitrotoluene bullion rectification and purification of claim 1, it is characterized in that: reboiler (1) is the falling film type reboiler.
3. according to the described device that is used for meta-nitrotoluene bullion rectification and purification of claim 1, it is characterized in that: rectifying tower (2) is efficient wire packing tower.
4. according to the described device that is used for meta-nitrotoluene bullion rectification and purification of claim 3, it is characterized in that: efficient wire packing is copper wire gauze, Stainless Steel Cloth or wire netting, preferred galvanized wire mesh or black wire net.
5. the device that is used for meta-nitrotoluene bullion rectification and purification according to claim 1 is characterized in that: the circulation fluid of liquid-ring vacuum pump (8) is a liquid stock, preferred thick meta-nitrotoluene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203095787U CN202181270U (en) | 2011-08-24 | 2011-08-24 | Device for rectifying and purifying m-nitrotoluene coarse products |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203095787U CN202181270U (en) | 2011-08-24 | 2011-08-24 | Device for rectifying and purifying m-nitrotoluene coarse products |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202181270U true CN202181270U (en) | 2012-04-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203095787U Expired - Fee Related CN202181270U (en) | 2011-08-24 | 2011-08-24 | Device for rectifying and purifying m-nitrotoluene coarse products |
Country Status (1)
| Country | Link |
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| CN (1) | CN202181270U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103408589A (en) * | 2013-07-31 | 2013-11-27 | 安徽智新生化有限公司 | Preparation device for carbon 15 phosphate ester |
| CN103418153A (en) * | 2013-07-31 | 2013-12-04 | 南京佳业检测工程有限公司 | Nitrotoluene rectifying tower |
| CN103877829A (en) * | 2013-12-18 | 2014-06-25 | 西安近代化学研究所 | Method and device for absorbing tail gas from ethanediamine rectifying column |
| CN104447343A (en) * | 2014-10-29 | 2015-03-25 | 青岛科技大学 | Method for by-producing steam in ortho-nitrotoluene separation process |
| CN104930350A (en) * | 2015-05-11 | 2015-09-23 | 湖北东方化工有限公司 | Paranitrotoluene conveying device and device for preparing trinitrotoluene through nitrification of paranitrotoluene |
| CN103408589B (en) * | 2013-07-31 | 2016-11-30 | 安徽智新生化有限公司 | A kind of carbon 15 phosphate ester preparation facilities |
-
2011
- 2011-08-24 CN CN2011203095787U patent/CN202181270U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103408589A (en) * | 2013-07-31 | 2013-11-27 | 安徽智新生化有限公司 | Preparation device for carbon 15 phosphate ester |
| CN103418153A (en) * | 2013-07-31 | 2013-12-04 | 南京佳业检测工程有限公司 | Nitrotoluene rectifying tower |
| CN103408589B (en) * | 2013-07-31 | 2016-11-30 | 安徽智新生化有限公司 | A kind of carbon 15 phosphate ester preparation facilities |
| CN103877829A (en) * | 2013-12-18 | 2014-06-25 | 西安近代化学研究所 | Method and device for absorbing tail gas from ethanediamine rectifying column |
| CN103877829B (en) * | 2013-12-18 | 2016-07-06 | 西安近代化学研究所 | The absorption process of ethylenediamine rectifying column tail gas and device |
| CN104447343A (en) * | 2014-10-29 | 2015-03-25 | 青岛科技大学 | Method for by-producing steam in ortho-nitrotoluene separation process |
| CN104930350A (en) * | 2015-05-11 | 2015-09-23 | 湖北东方化工有限公司 | Paranitrotoluene conveying device and device for preparing trinitrotoluene through nitrification of paranitrotoluene |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120404 Termination date: 20150824 |
|
| EXPY | Termination of patent right or utility model |