CN108928895A - A kind of bipolar membrane electrodialysis cyclization method of ortho-position dihalogen for carboxylic acid - Google Patents
A kind of bipolar membrane electrodialysis cyclization method of ortho-position dihalogen for carboxylic acid Download PDFInfo
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- CN108928895A CN108928895A CN201810911868.5A CN201810911868A CN108928895A CN 108928895 A CN108928895 A CN 108928895A CN 201810911868 A CN201810911868 A CN 201810911868A CN 108928895 A CN108928895 A CN 108928895A
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- bipolar membrane
- carboxylic acid
- dihalogen
- ortho
- room
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
- C02F1/4693—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis electrodialysis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/34—Organic compounds containing oxygen
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/36—Organic compounds containing halogen
Abstract
The invention belongs to Industrial Waste Water Treatments field, it is related to a kind of ortho-position dihalogen for the bipolar membrane electrodialysis cyclization method of carboxylic acid.Bipolar membrane electrodialysis cyclization method of the ortho-position dihalogen provided by the present invention for carboxylic acid, pH value is continuously improved in the hydroxide ion dissociated in lye room by the first bipolar membrane device (two Room bipolar membrane devices), so that ortho-position dihalogen occurs cyclization in the lye room of pH10-13 for carboxylic acid solution and sloughs halogen, cyclisation carboxylate is obtained；Sodium hydroxide is obtained by the cation-exchange membrane in the second bipolar membrane device (two Room bipolar membrane devices), while when the pH of acid solution room drops to 0.5 or less, obtains cyclisation carboxylic acid.Therefore, the present invention effectively eliminates the investment of soda acid with provided offer ortho-position dihalogen for the bipolar membrane electrodialysis cyclization method of carboxylic acid, reduces costs and pollutes, moreover it is possible to significantly increase economic benefit.
Description
Technical field
The invention belongs to Industrial Waste Water Treatments field, it is related to a kind of ortho-position dihalogen for the bipolar membrane electrodialysis cyclisation side of carboxylic acid
Method.
Background technique
Bipolar membrane electrodialysis method is prepared in soda acid and is recycled as the compound membrane separation technique of electric drive, Food processing and processing
And there is performance outstanding in the fields such as separation of chemical material.Due to the characteristic of Bipolar Membrane, cleverly with amberplex into
Row combination can be designed that a variety of different techniques.
Currently, micro- useless treatment process input cost in medical industry field is excessively high, technique is cumbersome, and secondary pollution phenomenon compared with
It is serious.Main method is still to carry out waste processing as highly basic and strong acid with traditional addition sodium hydroxide and hydrogen chloride.
Treatment process needs to consume a large amount of acid-base solution, greatly improves the control difficulty and pollution level of process costs
In addition, there is no related experiment achievements for existing bipolar membrane electrodialysis law technology in terms of cyclisation ortho-position dihalogen is for carboxylic acid
And research contents can show that bipolar membrane electrodialysis method can successfully be cyclized such compound and output.
Therefore, to optimize from method, the angle system that cost reduced and reduced pollution, which is analyzed, to be considered, reasonable utilization Bipolar Membrane
The characteristic of itself, under the premise of high economic benefit, more easy green prepares product.
Summary of the invention
It is an object of the present invention to be directed to the deficiencies in the prior art, a kind of ortho-position dihalogen is provided for the double of carboxylic acid
Pole membrane electrodialysis cyclization method.
For this purpose, above-mentioned purpose of the invention is achieved through the following technical solutions:
A kind of bipolar membrane electrodialysis cyclization method of ortho-position dihalogen for carboxylic acid, bipolar membrane electrodialysis of the ortho-position dihalogen for carboxylic acid
Cyclization method includes the following steps: ortho-position dihalogen being passed through the first Bipolar Membrane as material liquid for carboxylic acid and sodium chloride mixed solution
The lye room of device, is room temperature in lye room and pH value is 11 ~ 13, and the alkali chamber outlet of the first bipolar membrane device obtains cyclisation carboxylic
Acid salt solution, while sour chamber outlet obtains hydrochloric acid solution；The second bipolar membrane device is passed through using cyclisation carboxylate as material liquid
Acid solution room, be room temperature and pH < 0.5 in acid solution room, the sour chamber outlet of the second bipolar membrane device obtains cyclisation carboxylic acid, while alkali
Chamber outlet obtains sodium hydroxide solution.
While by adopting the above technical scheme, the present invention can also be used or be combined using technology further below
Scheme:
Preferably, the ortho-position dihalogen is 2,3- dihalo- yl carboxylic acid for carboxylic acid.
Preferably, first bipolar membrane device and the second bipolar membrane device are two Room bipolar membrane devices.
Preferably, first bipolar membrane device includes the homogeneous cavity block and acid and alkali-resistance electrode of Bipolar Membrane, strong acid-base resistance.
Preferably, for the Bipolar Membrane of first bipolar membrane device with a thickness of 0.22 mm, film resistance is 3.5-4.5 Ω/cm2；
The homogeneous cavity block of strong alkali-acid resistance with a thickness of 0.16-0.23 mm, resistance is 6.5-10.0 Ω/cm2, exchange capacity 1.5-
1.8 mol/lg, moisture content 22-24%.
Preferably, second bipolar membrane device includes the homogeneous anode membrane and acid and alkali-resistance electrode of Bipolar Membrane, strong acid-base resistance.
Preferably, for the Bipolar Membrane of second bipolar membrane device with a thickness of 0.22 mm, film resistance is 3.5-4.5 Ω/cm2；
The homogeneous anode membrane of strong acid-base resistance with a thickness of 0.16-0.23 mm, resistance is 2.5-6.5 Ω/cm2, exchange capacity 1.6-2.0
Mol/lg, moisture content 33-38%.
Preferably, first bipolar membrane device current density when preparation is cyclized carboxylic acid salt solution is 100 ~ 300 A/
m2。
The present invention provides a kind of ortho-position dihalogen for the bipolar membrane electrodialysis cyclization method of carboxylic acid, passes through the first bipolar membrane device
PH value is continuously improved in the hydroxide ion dissociated in the lye room of (two Room bipolar membrane devices), so that ortho-position dihalogen is for carboxylic acid solution
Cyclization occurs in the lye room of pH10-13 and sloughs halogen, obtains cyclisation carboxylate；Pass through the second bipolar membrane device
Cation-exchange membrane in (two Room bipolar membrane devices) obtains sodium hydroxide, while when the pH of acid solution room drops to 0.5 or less, obtaining
To cyclisation carboxylic acid.Therefore, the present invention is effective for the bipolar membrane electrodialysis cyclization method of carboxylic acid with provided offer ortho-position dihalogen
The investment for eliminating soda acid, reduce costs and pollute, moreover it is possible to significantly increase economic benefit.
Detailed description of the invention
Fig. 1 is a kind of artwork of the ortho-position dihalogen provided by the present invention for the bipolar membrane electrodialysis cyclization method of carboxylic acid.
Specific embodiment
The present invention is further described in detail referring to the drawings and specific embodiments.
A kind of ortho-position dihalogen includes the following steps: ortho-position dihalogen for the bipolar membrane electrodialysis cyclization method of carboxylic acid for carboxylic
The mixed solution of acid and sodium chloride is passed through the lye room of the first bipolar membrane device as material liquid, is room temperature and pH value in lye room
It is 11 ~ 13, sodium hydroxide starts to react generation cyclisation carboxylate for carboxylic acid with ortho-position dihalogen, so that the alkali of the first bipolar membrane device
Chamber outlet obtains cyclisation carboxylic acid salt solution, while hydrochloric acid solution is generated in acid solution room；Carboxylic acid salt solution will be cyclized as raw material
Liquid is passed through in the acid solution room of the second bipolar membrane device, when normal temperature state is down toward pH < 0.5, the acid solution room of the second bipolar membrane device
In obtain cyclisation carboxylic acid, while lye the room in generation sodium hydroxide solution.
First bipolar membrane device is two Room bipolar membrane devices, and the second bipolar membrane device is all two Room bipolar membrane devices.
First bipolar membrane device includes the homogeneous cavity block and acid-fast alkali-proof electrode of Bipolar Membrane, strong acid-base resistance.
For the Bipolar Membrane of first bipolar membrane device with a thickness of 0.22 mm, film resistance is 3.5-4.5 Ω/cm2；Strong alkali-acid resistance
Homogeneous cavity block with a thickness of 0.16-0.23 mm, resistance is 6.5-10.0 Ω/cm2, exchange capacity is 1.5-1.8 mol/lg,
Moisture content 22-24%.
Second bipolar membrane device includes the homogeneous anode membrane and acid and alkali-resistance electrode of Bipolar Membrane, strong acid-base resistance.
For the Bipolar Membrane of second bipolar membrane device with a thickness of 0.22 mm, film resistance is 3.5-4.5 Ω/cm2；Strong acid-base resistance
Homogeneous anode membrane with a thickness of 0.16-0.23 mm, resistance is 2.5-6.5 Ω/cm2, exchange capacity is 1.6-2.0 mol/lg, is contained
Water rate 33-38%.
It is designed with each processing unit of the 2L/ days treating capacities to entire technique, installation and debugging, and normally transported
Row；
Raw material is the ortho-position dihalogen of 10L for carboxylic acid solution, is passed through the first bipolar membrane device, is 100-300 A/m in current density2
Under the conditions of circular flow to pH reach respective bins, obtain cyclisation carboxylic acid salt solution and hydrogen chloride solution, be cyclized carboxylic acid salt solution
Product content is 60.0% or more.
Cyclisation carboxylic acid salt solution is passed through the second bipolar membrane device and obtains sodium hydroxide solution and cyclisation carboxylic acid, wherein product
(cyclisation carboxylic acid) content is 70.0% or more.
The hydrogen chloride solution and sodium hydroxide solution that two bipolar membrane devices generate respectively are free of other impurities ion,
As high value added product.
Above-mentioned specific embodiment is used to illustrate the present invention, is merely a preferred embodiment of the present invention, rather than to this
Invention is limited, and within the spirit of the invention and the scope of protection of the claims, to any modification of the invention made, is equal
Replacement, improvement etc., both fall within protection scope of the present invention.
Claims (8)
1. a kind of ortho-position dihalogen is for the bipolar membrane electrodialysis cyclization method of carboxylic acid, which is characterized in that the ortho-position dihalogen is for carboxylic acid
Bipolar membrane electrodialysis cyclization method include the following steps: ortho-position dihalogen for carboxylic acid and sodium chloride mixed solution as material liquid
It is passed through the lye room of the first bipolar membrane device, is room temperature in lye room and pH value is 11 ~ 13, the lye room of the first bipolar membrane device
Outlet obtains cyclisation carboxylic acid salt solution, while sour chamber outlet obtains hydrochloric acid solution；It is passed through using cyclisation carboxylate as material liquid
The acid solution room of second bipolar membrane device, is room temperature and pH < 0.5 in acid solution room, and the sour chamber outlet of the second bipolar membrane device obtains
It is cyclized carboxylic acid, while alkali chamber outlet obtains sodium hydroxide solution.
2. ortho-position dihalogen according to claim 1 is for the bipolar membrane electrodialysis cyclization method of carboxylic acid, which is characterized in that described
Ortho-position dihalogen is 2,3- dihalo- yl carboxylic acid for carboxylic acid.
3. ortho-position dihalogen according to claim 1 is for the bipolar membrane electrodialysis cyclization method of carboxylic acid, which is characterized in that described
First bipolar membrane device and the second bipolar membrane device are two Room bipolar membrane devices.
4. ortho-position dihalogen according to claim 1 or 3 is for the bipolar membrane electrodialysis cyclization method of carboxylic acid, which is characterized in that
First bipolar membrane device includes the homogeneous cavity block and acid and alkali-resistance electrode of Bipolar Membrane, strong acid-base resistance.
5. ortho-position dihalogen according to claim 4 is for the bipolar membrane electrodialysis cyclization method of carboxylic acid, which is characterized in that described
For the Bipolar Membrane of first bipolar membrane device with a thickness of 0.22 mm, film resistance is 3.5-4.5 Ω/cm2；The homogeneous cavity block of strong acid-base resistance
With a thickness of 0.16-0.23 mm, resistance is 6.5-10.0 Ω/cm2, and exchange capacity is 1.5-1.8 mol/lg, moisture content 22-
24%。
6. ortho-position dihalogen according to claim 1 or 3 is for the bipolar membrane electrodialysis cyclization method of carboxylic acid, which is characterized in that
Second bipolar membrane device includes the homogeneous anode membrane and acid and alkali-resistance electrode of Bipolar Membrane, strong acid-base resistance.
7. ortho-position dihalogen according to claim 6 is for the bipolar membrane electrodialysis cyclization method of carboxylic acid, which is characterized in that described
For the Bipolar Membrane of second bipolar membrane device with a thickness of 0.22 mm, film resistance is 3.5-4.5 Ω/cm2；The homogeneous anode membrane of strong acid-base resistance
With a thickness of 0.16-0.23 mm, resistance is 2.5-6.5 Ω/cm2, exchange capacity is 1.6-2.0 mol/lg, moisture content 33-
38%。
8. ortho-position dihalogen according to claim 1 is for the bipolar membrane electrodialysis cyclization method of carboxylic acid, which is characterized in that described
First bipolar membrane device current density when preparation is cyclized carboxylic acid salt solution is 100 ~ 300 A/cm2。
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109876678A (en) * | 2019-04-02 | 2019-06-14 | 浙江迪萧环保科技有限公司 | A kind of bipolar membrane and preparation method |
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Application publication date: 20181204 |