CN112939838A - NMP waste liquid purification method and system - Google Patents
NMP waste liquid purification method and system Download PDFInfo
- Publication number
- CN112939838A CN112939838A CN202110183004.8A CN202110183004A CN112939838A CN 112939838 A CN112939838 A CN 112939838A CN 202110183004 A CN202110183004 A CN 202110183004A CN 112939838 A CN112939838 A CN 112939838A
- Authority
- CN
- China
- Prior art keywords
- membrane
- waste liquid
- filtration
- nmp
- fine filtration
- 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.)
- Pending
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D207/00—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom
- C07D207/02—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D207/18—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having one double bond between ring members or between a ring member and a non-ring member
- C07D207/22—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having one double bond between ring members or between a ring member and a non-ring member with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D207/24—Oxygen or sulfur atoms
- C07D207/26—2-Pyrrolidones
- C07D207/263—2-Pyrrolidones with only hydrogen atoms or radicals containing only hydrogen and carbon atoms directly attached to other ring carbon atoms
- C07D207/267—2-Pyrrolidones with only hydrogen atoms or radicals containing only hydrogen and carbon atoms directly attached to other ring carbon atoms with only hydrogen atoms or radicals containing only hydrogen and carbon atoms directly attached to the ring nitrogen atom
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D15/00—Separating processes involving the treatment of liquids with solid sorbents; Apparatus therefor
- B01D15/08—Selective adsorption, e.g. chromatography
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/025—Reverse osmosis; Hyperfiltration
- B01D61/026—Reverse osmosis; Hyperfiltration comprising multiple reverse osmosis steps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/14—Ultrafiltration; Microfiltration
- B01D61/145—Ultrafiltration
- B01D61/146—Ultrafiltration comprising multiple ultrafiltration steps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/58—Multistep processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2311/00—Details relating to membrane separation process operations and control
- B01D2311/26—Further operations combined with membrane separation processes
- B01D2311/2626—Absorption or adsorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2317/00—Membrane module arrangements within a plant or an apparatus
- B01D2317/02—Elements in series
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2317/00—Membrane module arrangements within a plant or an apparatus
- B01D2317/06—Use of membrane modules of the same kind
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2317/00—Membrane module arrangements within a plant or an apparatus
- B01D2317/08—Use of membrane modules of different kinds
Abstract
The invention relates to a method for purifying NMP waste liquid, which comprises the following steps: carrying out primary filtration on the NMP waste liquid, wherein the filtration precision of the primary filtration is 0.1-10 mu m; under the pressure condition of below 10bar, carrying out primary fine filtration on the NMP waste liquid after the primary filtration through a primary fine filtration membrane, wherein the filtration precision of the primary fine filtration membrane is a membrane with the thickness of 1-10 nm; under the pressure condition below 15bar, performing secondary fine filtration on the NMP waste liquid subjected to the primary fine filtration through a secondary fine filtration membrane, wherein the filtration precision of the secondary fine filtration membrane is less than 5 nm; and under the pressure condition of below 40bar, carrying out three-stage fine filtration on the NMP waste liquid subjected to the second-stage fine filtration through a three-stage fine filtration membrane, wherein the filtration precision of the three-stage fine filtration membrane is less than 0.1nm, and collecting filtrate to obtain the NMP purification liquid. The method adopts the membrane process to purify the NMP waste liquid, separates impurities and NMP solvent in the waste liquid, and has the advantages of small investment, small occupied area, simple process and low operating cost.
Description
Technical Field
The invention belongs to the field of electronics, and particularly relates to a method and a system for purifying NMP waste liquid.
Background
At present, NMP (N-methyl pyrrolidone) waste liquid is used as a dangerous waste, and the treatment mode mainly comprises the following steps: the NMP has higher potential economic value, and the incineration can realize harmless treatment of hazardous waste, but the production cost is increased, the resource is wasted, and the like, so the main treatment methods adopted in the current hazardous waste industry are distillation and rectification recovery and purification, and the NMP waste liquid is regenerated and circulated, but the problems of distillation and rectification are as follows:
1) large investment, complex accessory equipment and difficult long-term barrier-free operation: because the distillation and rectification methods adopt temperature and boiling point difference to separate solid and liquid, a temperature support system, a distillation and rectification separation tower, a feeding system, a deslagging system, a condensing system, a waste gas treatment system, a waste liquid treatment system and the like, and a large and long pipeline system and pipeline heat insulation measures are required to be built; therefore, the disposal mode has large initial investment, higher maintenance requirement on the use process, shorter operating time without obstacles and the like.
2) The operation cost is high: the distillation and rectification method adopts the boiling point of a substance to separate and purify components, so that the heat consumption in the operation process is higher, and the energy consumption is higher when the boiling point of the waste liquid is higher.
3) The potential safety and environmental protection hazards exist in long-distance and large-scale transportation: because distillation, rectification facility investment is great, therefore difficult multiple spot construction, inevitable produce the transport of dangerous useless long distance, because NMP waste liquid belongs to organic hazardous waste, its safety, the environmental risk of long distance transportation that lead to it is poisonous, flammable, explosive.
4) The distillation and rectification yield is small: in the distillation and rectification methods, the waste liquid is heated from normal temperature to boiling point under reduced pressure to separate solid and liquid, so that the separation time is long, and the decomposition of organic components is caused by too high temperature.
Therefore, how to find a method for purifying and regenerating the NMP waste liquid without distillation and rectification is a technical problem which needs to be solved in the field.
Disclosure of Invention
In order to solve the technical problems, the invention provides a method for purifying NMP waste liquid.
The technical scheme for solving the technical problems is as follows: an NMP waste liquid purification method comprises the following steps:
carrying out primary filtration on the NMP waste liquid, wherein the filtration precision of the primary filtration is 0.1-10 mu m;
under the pressure condition of below 10bar, carrying out primary fine filtration on the NMP waste liquid after primary filtration, wherein the filtration precision of the primary fine filtration is a membrane with the thickness of 1-10 nm;
performing secondary fine filtration on the NMP waste liquid subjected to the primary fine filtration under the pressure condition of below 15bar, wherein the filtration precision of the secondary fine filtration is less than 5 nm;
and carrying out three-stage fine filtration on the NMP waste liquid subjected to the secondary fine filtration under the pressure condition of below 40bar, wherein the filtration precision of the three-stage fine filtration is less than 0.1nm, and collecting filtrate to obtain the NMP purification liquid.
The NMP waste liquid purification method disclosed by the application has the beneficial effects that: the method adopts a membrane process to purify the NMP waste liquid, and separates impurities and NMP solvent in the waste liquid; the membrane method belongs to a physical mode, does not need higher temperature, needs less energy consumption and does not cause the change of the components of the waste liquid, and the invention can be used in the electronic field, the waste liquid treatment field or other related fields needing to treat NMP waste liquid.
Further, the method also comprises the following steps: and under a pH neutral environment, sequentially passing the NMP purification liquid through at least two stages of polymer adsorption resins, and adsorbing and removing metal impurities in the NMP purification liquid to obtain an NMP purification product.
The application also provides a NMP waste liquid purification system, which comprises a rough filtering device, a first-stage fine filtering membrane, a second-stage fine filtering membrane and a third-stage fine filtering membrane, wherein the rough filtering device, the first-stage fine filtering membrane, the second-stage fine filtering membrane and the third-stage fine filtering membrane are sequentially used for filtering the NMP waste liquid,
the filter fineness of rough filter equipment is 0.1um ~ 10um, the filter fineness of one-level smart filter membrane is 1 ~ 10nm, the filter fineness of second grade smart filter membrane is less than 5nm, the filter fineness of tertiary smart filter membrane is less than 0.1 nm.
The application discloses NMP waste liquid purification system, it filters large granule impurity through rough filter device prefiltration, then filters the impurity such as photoresist in the membrane removal NMP waste liquid through cubic essence, and the NMP purifying liquid that obtains can be used for the technology retrieval and utilization.
Further, the coarse filtration device is connected with the first-stage fine filtration membrane through a purification device circulation storage tank.
Furthermore, the first-stage fine filtration membrane is connected with the second-stage fine filtration membrane, and the second-stage fine filtration membrane is connected with the third-stage fine filtration membrane through a buffer tank.
Further, the device also comprises at least two stages of polymer adsorption devices connected with the outlets of the three stages of fine filtration membranes in series.
Further, the polymer adsorption device is filled with polymer adsorption resin.
Further, the first-stage fine filtration membrane is an organic membrane or an inorganic membrane.
Further, the primary fine filter membrane is a roll membrane, a permeable membrane or a high-pressure membrane.
Further, the secondary fine filtration membrane is an organic membrane or an inorganic membrane.
Further, the secondary fine filtration membrane is a roll-up membrane, a permeable membrane or a high-pressure membrane.
Further, the three-stage fine filtration membrane is an organic membrane or an inorganic membrane.
Further, the three-stage fine filtration membrane is a roll-up membrane, a permeable membrane or a high-pressure membrane.
Drawings
FIG. 1 is a schematic flow diagram of the NMP purification method in the example;
FIG. 2 is a schematic diagram of the connection of NMP purification system in the example
Description of reference numerals: 1. a coarse filtration device; 2. a first-stage fine filtration membrane; 3. a secondary fine filtration membrane; 4. a third-stage fine filtration membrane; 5. a buffer tank; 6. the purification device circulates the storage tank; 7. macromolecule adsorption equipment.
Detailed Description
The principles and features of this application are described below in conjunction with the drawings and the embodiments, which are set forth to illustrate the application and not to limit the scope of the application.
The following discloses many different embodiments or examples for implementing the subject technology described. While specific examples of one or more arrangements of features are described below to simplify the disclosure, the examples should not be construed as limiting the present disclosure, and a first feature described later in the specification in conjunction with a second feature can include embodiments that are directly related, can also include embodiments that form additional features, and further can include embodiments in which one or more additional intervening features are used to indirectly connect or combine the first and second features to each other so that the first and second features may not be directly related.
As shown in fig. 2, the present application discloses an embodiment of an NMP waste liquid purification system, which includes a rough filtration device 1, a first-stage fine filtration membrane 2, a second-stage fine filtration membrane 3, and a third-stage fine filtration membrane 4, wherein the rough filtration device 1, the first-stage fine filtration membrane 2, the second-stage fine filtration membrane 3, and the third-stage fine filtration membrane 4 are sequentially used for filtering the NMP waste liquid.
Wherein, the filtration precision of rough filtration device 1 is 0.1um ~ 10um, and the filtration precision of first grade finish filtration membrane 2 is 1 ~ 10nm, and the filtration precision of second grade finish filtration membrane 3 is less than 5nm, and the filtration precision of third grade finish filtration membrane 4 is less than 0.1 nm.
In a more specific embodiment, the coarse filtration device 1, the first-stage fine filtration membrane 2, the second-stage fine filtration membrane 3 and the third-stage fine filtration membrane 4 can be sequentially connected, wherein the coarse filtration device 1 is connected with the first-stage fine filtration membrane 2 through the purification device circulation storage tank 6, the first-stage fine filtration membrane 2 is connected with the second-stage fine filtration membrane 3, and the second-stage fine filtration membrane 3 is connected with the third-stage fine filtration membrane 4 through the buffer tank 5.
On the basis, three-level fine filtration membrane 4 is followed still to establish ties and is had two-stage polymer adsorption equipment 7, adsorbs metallic impurity through the polymer adsorption resin in the polymer adsorption equipment 7, and in an embodiment, polymer adsorption equipment 7 can be cylinder cylindric, and its inside is filled in there is polymer adsorption resin, and this polymer adsorption resin can adopt current polymer adsorption resin, and this application does not do specifically and restricts
It should be understood that the present application does not limit the valve and the delivery mechanism between the mechanisms, but the present application may include a delivery mechanism such as a valve or a pump body, and the present application may also deliver the liquid through an additional delivery mechanism.
This application during operation, liquid enters into purifier circulation jar 6 after passing through rough filter 1, then loops through one-level refined filtration membrane 2, buffer tank 5, second grade refined filtration membrane 3, buffer tank 5 and tertiary refined filtration membrane, and 4 accomplish by tertiary refined filtration membrane 4 and filter finally.
The application discloses NMP waste liquid purification system, it filters large granule impurity through rough filter 1 at first step, then removes impurity such as photoresist in the NMP waste liquid through 2 parts of one-level fine filtration membrane, removes impurity such as photoresist in the most NMP waste liquid through second grade fine filtration membrane 3, and finally, through tertiary fine filtration, gets rid of remaining whole photoresist in the NMP waste liquid, borrows again to adsorb by two-stage polymer resin and gets rid of metallic impurity.
On the basis of the above, the present application also provides the following embodiments of purifying the NMP waste liquid based on the above NMP waste liquid purification system, and the process flow diagram is shown in fig. 1, for convenience of comparison, the first-stage fine filtration membrane, the second-stage fine filtration membrane and the third-stage fine filtration membrane are all organic filtration membranes, and it should be understood that the first-stage fine filtration membrane, the second-stage fine filtration membrane and the third-stage fine filtration membrane may be inorganic high-pressure membranes, inorganic filtration membranes, inorganic roll-up membranes, organic high-pressure membranes, organic roll-up membranes and other fine filtration membranes.
Example 1
S1: waste NMP waste liquid is pumped into a coarse filter device 1 of 0.1um, large particle impurities are preliminarily filtered, and then the waste NMP waste liquid is added into a circulating storage tank 6 of a purification device, for example, the coarse filter device 1 can adopt a bag filter of 0.1um, after the step, the NMP waste liquid processed by the step S1 is tested, and the result shows that the color of the material liquid: yellow, platinum cobalt colorimetry chroma: 865, photoresist content: 0.8 percent.
S2: pumping the NMP waste liquid filtered in the step S1 into a primary fine filtration membrane with the filtration precision of 10nm by a high-pressure pump under the pressure of 10bar, performing primary fine filtration, partially removing impurities such as photoresist in the liquid, collecting the liquid subjected to the primary fine filtration, putting the liquid into a buffer tank 5, testing the NMP waste liquid treated in the step S2, and displaying the color of the liquid as a result: light yellow, platinum-cobalt colorimetry color: 302.3, photoresist content: 0.90 percent.
S3: pumping the NMP waste liquid obtained after filtration in the step S2 into a secondary fine filtration membrane with the filtration precision of 5nm by using a high-pressure pump at the pressure of 15bar, performing secondary fine filtration, removing most of photoresist and other impurities in the NMP waste liquid in the step, collecting the secondary fine filtration liquid, and putting the secondary fine filtration liquid into a buffer tank 5; the NMP waste liquid treated in step S3 is tested, and the color of the liquid is: light yellow, platinum-cobalt colorimetry color: 133.4, photoresist content: 0.19 percent.
S4: and pumping the NMP waste liquid obtained after filtration in the step S3 into a three-stage fine filtration membrane with the filtration precision of 0.1nm by using a high-pressure pump at 40bar, carrying out three-stage fine filtration, and collecting the filtrate to a product tank to obtain the NMP purification liquid.
Testing the NMP purifying liquid, wherein the color of the liquid is as follows: colorless, platinum-cobalt colorimetry chroma: about 10; the chroma requirement is less than 20, and the content of photoresist is as follows: 0.031%, and the photoresist removal rate is as high as 98%.
S5: and (3) sequentially adsorbing the NMP by two stages of high molecular resins, and adsorbing and removing metal impurities in the NMP purification solution to obtain an NMP purification product.
Example 2
S1: in the rough filter 1 of pumping 10um with useless NMP waste liquid, add purifier circulation storage tank 6 behind the prefiltering large granule impurity, test the NMP waste liquid through step S1 processing, the result shows, its feed liquid colour: yellow, platinum cobalt colorimetry chroma: 867, photoresist content: 1.81 percent;
s2: pumping the NMP waste liquid filtered in the step S1 into a first-level fine filtration membrane with the filtration precision of 1nm by a high-pressure pump by using the pressure of 5bar, collecting filtrate into a buffer tank 5, testing the NMP waste liquid treated in the step S2, and displaying the result that the color of the liquid material is as follows: light yellow, platinum-cobalt colorimetry color: 303.2, photoresist content: 0.89 percent.
S3: pumping the NMP waste liquid obtained after filtration in the step S2 into a secondary fine filtration membrane with the filtration precision of 1nm by using a high-pressure pump at the pressure of 10bar, and collecting filtrate and putting the filtrate into a buffer tank 5; the NMP waste liquid treated in step S3 was tested, and the color of the liquid: light yellow, platinum-cobalt colorimetry color: 133.1, photoresist content: 0.18 percent.
S4: and (2) pumping the NMP waste liquid obtained after filtration in the step S3 into a three-stage fine filtration membrane with the filtration precision of 0.05nm by using a high-pressure pump at 30bar pressure, collecting filtrate to a product tank to obtain NMP purifying liquid, and testing the NMP purifying liquid, wherein the color of the material liquid is as follows: colorless, platinum-cobalt colorimetry chroma: about 10; the chroma requirement is less than 20, and the content of photoresist is as follows: 0.032%, and the photoresist removal rate is as high as about 98%.
S5: and (3) sequentially adsorbing the NMP by two stages of high molecular resins, and adsorbing and removing metal impurities in the NMP purification solution to obtain an NMP purification product.
The contents of metal impurities in the NMP purified solution and the NMP waste solution were measured, and the results are shown in the following table:
according to the embodiment, the NMP waste liquid treated by the method has the advantages that the contents of all metal impurities and photoresist are greatly reduced, the reutilization standard can be met, two-stage adsorption is carried out on the polymer resin on the basis again, most metal impurities can be removed, and the purity of a purified product is further improved.
The embodiment disclosed in the application can implement effective separation under normal atmospheric temperature or low temperature environment, greatly reduces the content of middle photoresist of useless NMP waste liquid, and its clearance is greater than 90%, simultaneously, can effectively reduce NMP waste liquid and deal with the cost, reduce environmental protection risk. The purified NMP purifying liquid has greatly reduced metal impurity content, capacity of being reused, less waste and low cost.
The NMP waste liquid purification system that this application embodiment discloses, its simple structure does not need distillation, rectification or incinerator to participate in, and the method that this application provided can be applicable to the field that needs to handle the NMP waste liquid such as electron field, waste liquid treatment field mostly.
In the description of the present specification, it is to be understood that the terms "center", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "inner", "outer", "peripheral side", "circumferential", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present specification.
In the description of the present specification, "a plurality" means at least two, e.g., two, three, etc., unless explicitly defined otherwise.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
The terms used in the present specification are those general terms currently widely used in the art in consideration of functions related to the present disclosure, but they may be changed according to the intention of a person having ordinary skill in the art, precedent, or new technology in the art. Also, specific terms may be selected by the applicant, and in this case, their detailed meanings will be described in the detailed description of the present disclosure. Therefore, the terms used in the specification should not be construed as simple names but based on the meanings of the terms and the overall description of the present disclosure.
Flowcharts or text are used in this specification to illustrate the operational steps performed in accordance with embodiments of the present application. It should be understood that the operational steps in the embodiments of the present application are not necessarily performed in the exact order recited. Rather, the various steps may be processed in reverse order or simultaneously, as desired. Meanwhile, other operations may be added to the processes, or a certain step or several steps of operations may be removed from the processes.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. The NMP waste liquid purification method is characterized by comprising the following steps:
carrying out primary filtration on the NMP waste liquid, wherein the filtration precision of the primary filtration is 0.1-10 mu m;
under the pressure condition of below 10bar, carrying out primary fine filtration on the NMP waste liquid after primary filtration, wherein the filtration precision of the primary fine filtration is a membrane with the thickness of 1-10 nm;
performing secondary fine filtration on the NMP waste liquid subjected to the primary fine filtration under the pressure condition of below 15bar, wherein the filtration precision of the secondary fine filtration is less than 5 nm;
and under the pressure condition of below 40bar, carrying out three-stage fine filtration on the NMP waste liquid subjected to the secondary fine filtration through a three-stage fine filtration membrane, wherein the filtration precision of the three-stage fine filtration is less than 0.1nm, and collecting filtrate to obtain the NMP purified liquid.
2. The method for purifying an NMP waste liquid according to claim 1, further comprising the steps of: and under a pH neutral environment, sequentially passing the NMP purification liquid through at least two stages of polymer adsorption resins, and adsorbing and removing metal impurities in the NMP purification liquid to obtain an NMP purification product.
3. A NMP waste liquid purification system is characterized by comprising a rough filtering device, a first-stage fine filtering membrane, a second-stage fine filtering membrane and a third-stage fine filtering membrane, wherein the rough filtering device, the first-stage fine filtering membrane, the second-stage fine filtering membrane and the third-stage fine filtering membrane are sequentially used for filtering the NMP waste liquid,
the filter fineness of rough filter equipment is 0.1um ~ 10um, the filter fineness of one-level smart filter membrane is 1 ~ 10nm, the filter fineness of second grade smart filter membrane is less than 5nm, the filter fineness of tertiary smart filter membrane is less than 0.1 nm.
4. The NMP waste liquid purification system of claim 3, wherein the coarse filtration means and the primary polishing membrane are connected to each other through a purification means circulation tank.
5. The NMP waste liquid purification system of claim 3, wherein the first-stage fine filtration membrane and the second-stage fine filtration membrane, and the second-stage fine filtration membrane and the third-stage fine filtration membrane are connected by a buffer tank.
6. The NMP waste liquid purification system of claim 3, further comprising at least two stages of polymeric adsorption devices in series with the outlets of the three stages of fine filtration membranes.
7. The NMP waste liquid purification system of claim 6, wherein the polymeric adsorbent device is filled with a polymeric adsorbent resin.
8. The NMP waste liquid purification system of claim 3, wherein the primary polishing membrane is an organic membrane or an inorganic membrane, and the primary polishing membrane is a spiral membrane, a permeable membrane or a high pressure membrane.
9. The NMP waste liquid purification system of claim 3, wherein the secondary polishing membrane is an organic membrane or an inorganic membrane, and the secondary polishing membrane is a rolled membrane, a permeable membrane or a high pressure membrane.
10. The NMP waste liquid purification system of claim 3, wherein the tertiary polishing membrane is an organic membrane or an inorganic membrane, and the tertiary polishing membrane is a spiral membrane, a permeable membrane or a high pressure membrane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110183004.8A CN112939838A (en) | 2021-02-10 | 2021-02-10 | NMP waste liquid purification method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110183004.8A CN112939838A (en) | 2021-02-10 | 2021-02-10 | NMP waste liquid purification method and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112939838A true CN112939838A (en) | 2021-06-11 |
Family
ID=76245386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110183004.8A Pending CN112939838A (en) | 2021-02-10 | 2021-02-10 | NMP waste liquid purification method and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112939838A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114573493A (en) * | 2022-04-01 | 2022-06-03 | 迈玺(深圳)智能动力有限公司 | Method for purifying methyl pyrrolidone waste liquid |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102190611A (en) * | 2011-04-01 | 2011-09-21 | 四川天华股份有限公司 | Method for purifying N-methyl pyrrolidone and gamma-butyrolactone |
| CN109912485A (en) * | 2019-04-09 | 2019-06-21 | 慈溪市赛思德环保科技有限公司 | A kind of method and system of NMP waste liquid purification |
-
2021
- 2021-02-10 CN CN202110183004.8A patent/CN112939838A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102190611A (en) * | 2011-04-01 | 2011-09-21 | 四川天华股份有限公司 | Method for purifying N-methyl pyrrolidone and gamma-butyrolactone |
| CN109912485A (en) * | 2019-04-09 | 2019-06-21 | 慈溪市赛思德环保科技有限公司 | A kind of method and system of NMP waste liquid purification |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114573493A (en) * | 2022-04-01 | 2022-06-03 | 迈玺(深圳)智能动力有限公司 | Method for purifying methyl pyrrolidone waste liquid |
| CN114573493B (en) * | 2022-04-01 | 2024-03-26 | 迈玺(深圳)智能动力有限公司 | Purification method of methyl pyrrolidone waste liquid |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103663547A (en) | Treatment and recovery process of acid wastewater in titanium dioxide production process | |
| KR20140034307A (en) | Method and apparatus for purifying alcohol | |
| CN101773786B (en) | Method for desalination and concentration of medical intermediate | |
| CN101254985B (en) | PTA refined mother liquor reclaiming method and system | |
| CN107261872A (en) | A kind of urea for vehicle solution production system | |
| CN112830457A (en) | Novel purification process of hydrogen peroxide | |
| CN110818149A (en) | PTA refining mother liquor recovery method and recovery system | |
| CN112939838A (en) | NMP waste liquid purification method and system | |
| CN103055660B (en) | Method and system for treating cyclohexane oxidation tail gas | |
| EP0075663B1 (en) | Process and apparatus for producing highly pure nitrogen | |
| CN203635020U (en) | Separation and recycling device for tail gas produced by polypropylene | |
| CN201578995U (en) | Desalinization concentration system for medicine intermediates | |
| CN100551837C (en) | Resin adsorption method is removed the method for methane chloride bio-toxicity in the waste water | |
| CN101417943A (en) | Simple method and system for refining mother liquor by high efficiency recovery and utilization of PTA apparatus | |
| CN110252269A (en) | A kind of resin regeneration method for handling containing high-boiling components waste water | |
| CN114949904A (en) | Production method and device of high-purity electronic grade N-methyl-2-pyrrolidone | |
| CN102295380A (en) | Processing and recovering method of aromatic nitro-compound wastewater | |
| CN209816000U (en) | System for NMP waste liquid purification | |
| CN210736625U (en) | Electron-grade nitrogen methyl pyrrolidone purification system | |
| CN110436714B (en) | Treatment device and treatment method for sulfur-containing and ammonia nitrogen-containing landfill leachate | |
| CN105060249A (en) | Method for preparing refined hydrochloric acid by using tail gas hydrogen chloride produced in chloroacetic acid production | |
| CN112978845A (en) | Recycling treatment process for 1, 3-cyclohexanedione wastewater | |
| CN105712514A (en) | Membrane method separation purification technology of emulsified oil-containing wastewater | |
| CN106630213A (en) | Concentrating method of high-selenium water | |
| CN217627989U (en) | Isopropyl alcohol effluent disposal system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |