CN103523761B - A kind of nitric acid continuous stripping devices and methods therefor - Google Patents
A kind of nitric acid continuous stripping devices and methods therefor Download PDFInfo
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- CN103523761B CN103523761B CN201310482182.6A CN201310482182A CN103523761B CN 103523761 B CN103523761 B CN 103523761B CN 201310482182 A CN201310482182 A CN 201310482182A CN 103523761 B CN103523761 B CN 103523761B
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Abstract
The invention discloses a kind of nitric acid continuous stripping devices and methods therefor, this device comprise connect successively reboiler, distillation tower, first-stage condenser, blow White Tower and secondary condenser, described secondary condenser is connected to the first finished pot and the second finished pot, first finished pot is provided with the first electromagnetic valve, and the second finished pot is provided with the second electromagnetic valve.The present invention is simple to operate, just blows white before condensation to nitric acid, and because temperature is higher, nitric acid amount is relatively less, therefore decolours more easy, and the amount of simple substance amount nitric acid nitrogen used is original 1/3, greatly saves the usage quantity of nitrogen.
Description
Technical field
The present invention relates to a kind of continuous stripping device, particularly a kind of nitric acid continuous stripping devices and methods therefor.
Background technology
Nitric acid is one of common inorganic acid, and semi-conductor, flat pannel display, photovoltaic industry etching have very large effect; And conventional technical grade, Reagent grade nitric acid cannot be applicable to semiconductor technology because of reasons such as metal ion are many, residue is high, particle does not control; Therefore technical grade, Reagent grade nitric acid must be purified, and remove the specification that metal ion, residue, particle etc. are suitable for reach semi-conductor; And the nitric acid after distillation, owing to causing yellowish containing a large amount of NO2, therefore decolouring is the step important process during nitric acid is purified.In common nitric acid purifying technique, nitric acid after heating kettle heating, enter rectifying tower rectifying, then enter to enter after condenser is cooled to liquid blow white filling concentrate blow white, because disposable concentrated amount is comparatively large, and temperature such as to have reduced at the reason, causes that to blow the white time long, nitrogen consumption is large, the problems such as complicated operation.The reason being originally difficult to continuous stripping is because nitric acid undercooling, and a large amount of nitrogen of active reduction needs could replace NO2 wherein, and the nitric acid after control temperature can decolour very easily, and meets 10 black requirements once.Through condensed nitric acid temperature is low and to focus on quantity comparatively large, bleaching time is long, nitrogen consumption greatly, complicated operation.
Summary of the invention
For the deficiency that prior art exists, the invention provides a kind of nitric acid continuous stripping devices and methods therefor, this device is simple to operate, just nitric acid was blown white before condensation, because temperature is higher, nitric acid amount is relatively less, therefore decolours more easy, the amount of simple substance amount nitric acid nitrogen used is original 1/3, greatly saves the usage quantity of nitrogen.
To achieve these goals, the present invention realizes by the following technical solutions:
A kind of nitric acid continuous stripping device, comprise connect successively reboiler, distillation tower, first-stage condenser, blow White Tower and secondary condenser, described secondary condenser is connected to the first finished pot and the second finished pot, first finished pot is provided with the first electromagnetic valve, and the second finished pot is provided with the second electromagnetic valve.
Further, described distillation tower is provided with tower top temperature meter.
Further, described reboiler is provided with bottom temperature meter.
Further, blow White Tower described in be provided with and to blow white thermometer.
Further, described reboiler is provided with tower reactor tensimeter.
Further, described reboiler is provided with nitric acid feed flow meter.
Further, blow White Tower described in be provided with and to blow white under meter.
A kind of nitric acid continuous stripping method, the concrete steps of the method are:
Step 1, salpeter solution to be decoloured is input in reboiler, open the steam valve of reboiler, control vapor pressure is 0.15 ~ 0.25Mpa, and salpeter solution is heated to 120.5 ~ 130.0 DEG C in reboiler, and the salpeter solution inlet amount controlling reboiler is 80 ~ 100L/h; Control the tower reactor pressure <0.01Mpa of reboiler.
Step 2, by the nitric acid vapor after reboiler process again through distillation tower rectification and purification.
Step 3, by the nitric acid after rectification and purification by first-stage condenser condensation, again the nitric acid after first-stage condenser process is blown white by blowing White Tower, the nitrogen flow controlling to blow White Tower is 10mL/min, blow white after nitric acid cool through secondary condenser, thorough cooled nitric acid enters finished pot finished product again.
Adopt the nitric acid continuous stripping devices and methods therefor of technique scheme, just nitric acid was blown white before condensation, because temperature is higher, nitric acid amount is relatively less, therefore decolour more easy, the amount of simple substance amount nitric acid nitrogen used is original 1/3, make nitric acid colourity be down to 10 black once below, save the usage quantity of nitrogen, easy operating process simultaneously.
Accompanying drawing explanation
The present invention is described in detail below in conjunction with the drawings and specific embodiments;
Fig. 1 is the structural representation of nitric acid continuous stripping device of the present invention.
Embodiment
The technique means realized for making the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with embodiment, setting forth the present invention further.
As shown in Figure 1, a kind of nitric acid continuous stripping device, comprise connect successively reboiler 1, distillation tower 2, first-stage condenser 3, blow White Tower 4 and secondary condenser 5, secondary condenser 5 is connected to the first finished pot 6 and the second finished pot 7, first finished pot 6 is provided with the first electromagnetic valve 14, second finished pot 7 is provided with the second electromagnetic valve 15, controls by the first electromagnetic valve 14 and the second electromagnetic valve 15 sequence number that nitric acid enters finished pot; Distillation tower 2 is provided with tower top temperature meter 8, and the distillation temperature that distillation tower 2 monitored by tower top temperature meter 8 is 120.5 ~ 130.0 DEG C; Reboiler 1 is provided with bottom temperature meter 9, and the vaporization temperature that reboiler 1 monitored by bottom temperature meter 9 is 120.5 ~ 130.0 DEG C; Blow White Tower 4 to be provided with and to blow white thermometer 10, blowing the white temperature of blowing that the monitoring of white thermometer 10 blows White Tower 4 is 30 ~ 40 DEG C; Reboiler 1 is provided with tower reactor tensimeter 11, and the tower reactor pressure <0.01Mpa of reboiler 1 monitored by tower reactor tensimeter 11; Reboiler 1 is provided with nitric acid feed flow meter 12; Blow White Tower 4 to be provided with and to blow white under meter 13, blow the monitoring of white under meter 13 and blow White Tower 4 to control feed rate be that to blow white flow be 10mL/min for 80 ~ 100L/h and nitrogen.
A kind of nitric acid continuous stripping method, the concrete steps of the method are:
Step 1, salpeter solution to be decoloured is input in reboiler 1, open the steam valve of reboiler 1, control vapor pressure is 0.15 ~ 0.25Mpa, and salpeter solution is heated to 120.5 ~ 130.0 DEG C in reboiler 1, and the salpeter solution inlet amount controlling reboiler 1 is 80 ~ 100L/h; Control the tower reactor pressure <0.01Mpa of reboiler 1.
Step 2, by the nitric acid vapor after reboiler 1 processes again through distillation tower 2 rectification and purification.
Step 3, by the nitric acid after rectification and purification by first-stage condenser 3 condensation, again the nitric acid after first-stage condenser 3 processes is blown white by blowing White Tower 4, the nitrogen flow controlling to blow White Tower 4 is 10mL/min, blow white after nitric acid cool through secondary condenser 5, thorough cooled nitric acid enters finished pot finished product again.
Nitric acid continuous stripping method of the present invention, just nitric acid was blown white before condensation, because temperature is higher, nitric acid amount is relatively less, therefore decolour more easy, the amount of simple substance amount nitric acid nitrogen used is original 1/3, make nitric acid colourity be down to 10 black once below, save the usage quantity of nitrogen, easy operating process simultaneously.
More than show and describe ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification sheets just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (2)
1. a nitric acid continuous stripping device, comprise connect successively reboiler, distillation tower, first-stage condenser, blow White Tower and secondary condenser, it is characterized in that: described secondary condenser is connected to the first finished pot and the second finished pot, first finished pot is provided with the first electromagnetic valve, and the second finished pot is provided with the second electromagnetic valve; Described reboiler is provided with nitric acid feed flow meter, bottom temperature meter and tower reactor tensimeter; The described White Tower that blows is provided with and blows white under meter and blow white thermometer, described in blow White Tower and nitric acid blown white before condensation; Described distillation tower is provided with tower top temperature meter.
2. use the device described in claim 1 to realize a method for nitric acid continuous stripping, the concrete steps of the method are:
Step 1, salpeter solution to be decoloured is input in reboiler, open the steam valve of reboiler, control vapor pressure is 0.15 ~ 0.25Mpa, and salpeter solution is heated to 120.5 ~ 130.0 DEG C in reboiler, and the salpeter solution inlet amount controlling reboiler is 80 ~ 100L/h; Control the tower reactor pressure <0.01Mpa of reboiler;
Step 2, by the nitric acid vapor after reboiler process again through distillation tower rectification and purification;
Step 3, by the nitric acid after rectification and purification by first-stage condenser condensation, again the nitric acid after first-stage condenser process is blown white by blowing White Tower, the nitrogen flow controlling to blow White Tower is 10mL/min, blow white after nitric acid cool through secondary condenser, thorough cooled nitric acid enters finished pot finished product again.
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| CN201310482182.6A CN103523761B (en) | 2013-10-15 | 2013-10-15 | A kind of nitric acid continuous stripping devices and methods therefor |
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| CN201310482182.6A CN103523761B (en) | 2013-10-15 | 2013-10-15 | A kind of nitric acid continuous stripping devices and methods therefor |
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| CN103523761A CN103523761A (en) | 2014-01-22 |
| CN103523761B true CN103523761B (en) | 2015-08-05 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111661828B (en) * | 2020-05-25 | 2023-07-11 | 烟台远东精细化工有限公司 | Preparation method of high-purity reagent nitric acid |
| CN111994885B (en) * | 2020-08-25 | 2021-12-24 | 福建天甫电子材料有限公司 | Preparation device and preparation process for electronic-grade nitric acid |
| CN113493192B (en) * | 2021-08-09 | 2022-07-29 | 联仕(昆山)化学材料有限公司 | Production process of electronic-grade nitric acid |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101264869A (en) * | 2008-04-03 | 2008-09-17 | 江阴市润玛电子材料有限公司 | Continuous producing technique for ultra-high pure nitric acid |
| CN102139864A (en) * | 2011-02-21 | 2011-08-03 | 上海正帆科技有限公司 | Method for producing electronic-grade nitric acid |
| CN202449859U (en) * | 2012-01-12 | 2012-09-26 | 天津大学 | Device for purifying inorganic acid reagent |
| CN103112835A (en) * | 2012-11-11 | 2013-05-22 | 安徽金禾实业股份有限公司 | Indirect bleaching method in concentrated nitric acid production process |
| CN103569978A (en) * | 2013-11-01 | 2014-02-12 | 安徽金禾实业股份有限公司 | Nitric acid gas stripping and decolorizing method and device |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101264869A (en) * | 2008-04-03 | 2008-09-17 | 江阴市润玛电子材料有限公司 | Continuous producing technique for ultra-high pure nitric acid |
| CN102139864A (en) * | 2011-02-21 | 2011-08-03 | 上海正帆科技有限公司 | Method for producing electronic-grade nitric acid |
| CN202449859U (en) * | 2012-01-12 | 2012-09-26 | 天津大学 | Device for purifying inorganic acid reagent |
| CN103112835A (en) * | 2012-11-11 | 2013-05-22 | 安徽金禾实业股份有限公司 | Indirect bleaching method in concentrated nitric acid production process |
| CN103569978A (en) * | 2013-11-01 | 2014-02-12 | 安徽金禾实业股份有限公司 | Nitric acid gas stripping and decolorizing method and device |
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