CN208104258U - chromatographic pure methanol production system and production line - Google Patents
chromatographic pure methanol production system and production line Download PDFInfo
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- CN208104258U CN208104258U CN201721095631.1U CN201721095631U CN208104258U CN 208104258 U CN208104258 U CN 208104258U CN 201721095631 U CN201721095631 U CN 201721095631U CN 208104258 U CN208104258 U CN 208104258U
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Abstract
A kind of Chromatographic Pure Methanol production system and production line, it is related to chemical products purifier apparatus field, Chromatographic Pure Methanol production system includes sequentially connected active carbon adsorption column, kieselguhr adsorption column, cation exch ange adsorption resin column, 4A molecular sieve adsorption column, filter, wherein, active carbon adsorption column includes the interior cylinder for being equipped with cavity, the both ends of cylinder are connected separately with dismountable connector, connector is equipped with the connecting hole being connected to cavity, gasket is equipped between cylinder and each connector, the middle part of gasket is equipped with filter screen, adsorbent material is equipped in cavity, adsorbent material is active carbon, the Chromatographic Pure Methanol production system it is easy to operate, it is easy to use, it can purify to obtain Chromatographic Pure Methanol；Large-scale Chromatographic Pure Methanol production is able to carry out by the Chromatographic Pure Methanol production line that above-mentioned Chromatographic Pure Methanol production system forms.
Description
Technical field
The utility model relates to chemical products purifier apparatus fields, produce system in particular to a kind of Chromatographic Pure Methanol
System and production line.
Background technique
Chromatographically pure refers to the standard reagent or solvent for carrying out using when chromatography, the ultraviolet light absorption at low wavelength
It spends relatively low, under chromatographic condition, the peak of appointed compound can only occur, there can be no impurity peaks, therefore, chromatography pure reagent
Purity requirement is very high, in addition to the requirement to appointed compound content is very high, also has to impurity contents such as micronic dust therein, moisture
Very high requirement belongs to the scope of high purity reagent.Currently, domestic chromatographically pure market is mostly that external Reagent Company is monopolized, such as
Merck, Sigma, Fisher, Tedia etc., external Reagent Company's price is high, for domestic chromatographically pure user, will lead to
Cost is excessively high.Therefore, break monopolization of the foreign technology obstacle to the chromatographically pure technical field in China, establish what China had by oneself
The standardization industry of chromatography pure reagent has great meaning and effect.
Chromatographic Pure Methanol is one of common liquid chromatogram mobile phase, both at home and abroad it has been reported that the purifying work of a variety of methanol
Skill, purification process mainly include：Including：Decoloration, absorption, rectifying, or decoloration, absorption, rectifying combine, these are pure
The shortcomings that change method is that product purity is not high, is unsatisfactory for scientific research requirements or yield is high, cost is excessively high.
Therefore, it is necessary to a kind of easy to operate, equipment for purifying of the good Chromatographic Pure Methanol of easy to use and refining effect.
Utility model content
It is easy to operate the purpose of this utility model is to provide a kind of Chromatographic Pure Methanol production system, it is easy to use, it can mention
It is pure to obtain Chromatographic Pure Methanol.
The another object of the utility model is to provide a kind of Chromatographic Pure Methanol production line, is able to carry out large-scale color
Compose pure methanol production.
What the embodiments of the present invention were realized in：
A kind of Chromatographic Pure Methanol production system comprising sequentially connected：
Active carbon adsorption column, for carrying out activated carbon adsorption；
Kieselguhr adsorption column, for carrying out kieselguhr adsorption；
Cation exch ange adsorption resin column, for carrying out ion exchange；
4A molecular sieve adsorption column, for carrying out 4A molecular sieve absorption；And
Filter, for being filtered；
Active carbon adsorption column includes the interior cylinder for being equipped with cavity, and the both ends of cylinder are connected separately with dismountable connector,
Connector is equipped with the connecting hole being connected to cavity, and gasket is equipped between cylinder and each connector, is set in the middle part of gasket
There is filter screen, is equipped with adsorbent material in cavity, adsorbent material is active carbon.
In the utility model preferred embodiment, two pressing plates arranged up and down, adsorption material are additionally provided in above-mentioned cavity
Material is set between two pressing plates, and multiple through-holes are offered on pressing plate.
In the utility model preferred embodiment, above-mentioned two pressing plate is connected by connecting rod, between two pressing plates between
Away from adjustable.
In the utility model preferred embodiment, above-mentioned cylinder is vertically arranged, the connection in underlying connector
Hole is feed opening, and the connecting hole in connector being located above is discharge hole.
In the utility model preferred embodiment, above-mentioned active carbon adsorption column, kieselguhr adsorption column, cation exchange are inhaled
Attached resin column, the structure of 4A molecular sieve adsorption column are roughly the same, the difference is that：Adsorbent material in kieselguhr adsorption column is
Diatomite, the adsorbent material in cation exch ange adsorption resin column are resin cation, the adsorption material in 4A molecular sieve adsorption column
Material is 4A molecular sieve.
In the utility model preferred embodiment, the number of above-mentioned active carbon adsorption column is at least two, and parallel connection is even
It connects；The number of kieselguhr adsorption column is at least two, and is connected in parallel；The number of cation exch ange adsorption resin column is at least two
Branch, and be connected in parallel；The number of 4A molecular sieve adsorption column is at least two, and is connected in parallel.
In the utility model preferred embodiment, above-mentioned Chromatographic Pure Methanol production system further includes feedstock transportation pump, former
The bottom of material conveying pump and active carbon adsorption column connection, for conveying raw material into active carbon adsorption column automatically.
In the utility model preferred embodiment, above-mentioned Chromatographic Pure Methanol production system further includes nitrogen protection adsorption column
Regenerative system, nitrogen protection adsorption column regenerative system can provide nitrogen protection, and carry out heating cooling using baking oven.
A kind of Chromatographic Pure Methanol production line comprising above-mentioned Chromatographic Pure Methanol production system.
In the utility model preferred embodiment, above-mentioned Chromatographic Pure Methanol production line further includes head tank, products pot, original
Batch can is connect with active carbon adsorption column, and products pot is connected to the filter.
The beneficial effect of the utility model embodiment is：The Chromatographic Pure Methanol production system of the utility model embodiment includes
Sequentially connected active carbon adsorption column, kieselguhr adsorption column, cation exch ange adsorption resin column, 4A molecular sieve adsorption column, filtering
Device, wherein active carbon adsorption column includes the interior cylinder for being equipped with cavity, and the both ends of cylinder are connected separately with dismountable connector,
Connector is equipped with the connecting hole being connected to cavity, and gasket is equipped between cylinder and each connector, is set in the middle part of gasket
Have a filter screen, adsorbent material be equipped in cavity, adsorbent material is active carbon, the Chromatographic Pure Methanol production system it is easy to operate,
It is easy to use, it can purify to obtain Chromatographic Pure Methanol；The Chromatographic Pure Methanol production line being made of above-mentioned Chromatographic Pure Methanol production system
It is able to carry out large-scale Chromatographic Pure Methanol production.
Detailed description of the invention
It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
Attached drawing be briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore should not be by
Regard the restriction to range as, for those of ordinary skill in the art, without creative efforts, may be used also
To obtain other relevant attached drawings according to these attached drawings.
Fig. 1 is the structural schematic diagram for the Chromatographic Pure Methanol production system that the utility model first embodiment provides；
Fig. 2 is the decomposition texture schematic diagram of active carbon adsorption column in Fig. 1；
Fig. 3 is the structural schematic diagram for the Chromatographic Pure Methanol production line that the utility model second embodiment provides；
Fig. 4 is the decomposition texture schematic diagram of active carbon adsorption column in Fig. 3.
Icon：100- production system；001- feedstock transportation pump；002- active carbon adsorption column；003- kieselguhr adsorption column；
004- cation exch ange adsorption resin column；005-4A molecular sieve adsorption column；006- filter；301- cylinder；302- cavity；303-
Connector；304- connecting hole；305- gasket；306- filter screen；307- adsorbent material；308- pressing plate；309- through-hole；310- connects
Bar；300- Chromatographic Pure Methanol production line；200- Chromatographic Pure Methanol production system；201- head tank；202- products pot；203- activity
Charcoal adsorption column；204- handle.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Usually here in attached drawing description and
The component of the utility model embodiment shown can be arranged and be designed with a variety of different configurations.
Therefore, requirement is not intended to limit to the detailed description of the embodiments of the present invention provided in the accompanying drawings below
The scope of the utility model of protection, but it is merely representative of the selected embodiment of the utility model.Based in the utility model
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the range of the utility model protection.
It should be noted that：Similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In the description of the present invention, it should be noted that term " on ", "lower", "vertical", "horizontal", "inner",
The orientation or positional relationship of the instructions such as "outside" is to be based on the orientation or positional relationship shown in the drawings or the utility model product
The orientation or positional relationship usually put when use, is merely for convenience of describing the present invention and simplifying the description, without referring to
Show or imply that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot manage
Solution is limitations of the present invention.
In addition, the terms such as term "horizontal", "vertical" are not offered as requiring component abswolute level or pendency, but can be slightly
Low dip.It is not to indicate that the structure has been had to if "horizontal" only refers to that its direction is more horizontal with respect to for "vertical"
It is complete horizontal, but can be slightly tilted.
In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, term " is set
Set ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in utility model.
First embodiment
Fig. 1 is please referred to, the present embodiment provides a kind of Chromatographic Pure Methanol production systems 100 comprising sequentially connected：For
Carry out the active carbon adsorption column 002 of activated carbon adsorption；For carrying out the kieselguhr adsorption column 003 of kieselguhr adsorption；For carry out
The cation exch ange adsorption resin column 004 of ion exchange；For carrying out the 4A molecular sieve adsorption column 005 of 4A molecular sieve absorption；With
And the filter 006 for being filtered.
Shown in Figure 2, active carbon adsorption column 002 includes the interior cylinder 301 for being equipped with cavity 302, the both ends point of cylinder 301
It is not connected with dismountable connector 303, connector 303 is equipped with the connecting hole 304 be connected to cavity 302, cylinder 301 and each
Gasket 305 is equipped between connector 303, the middle part of gasket 305 is equipped with filter screen 306, is equipped with adsorption material in cavity 302
Expect 307, the adsorbent material 307 filled in active carbon adsorption column 002 is activating and regenerating type active carbon.It is additionally provided in cavity 302
Two pressing plates 308 of lower arrangement, adsorbent material 307 are set between two pressing plates 308, and multiple through-holes are offered on pressing plate 308
309；Two pressing plates 308 are connected by connecting rod 310, and its spacing is adjustable.
Active carbon adsorption column 002 includes cylinder 301 and the connector 303 being detachably connected respectively with 301 both ends of cylinder, makes
User can very easily separate connector 303 with cylinder 301, so that adsorbent material 307 is arranged inside cylinder 301
Cavity 302 in take out and replaced, the gasket 305 being furthermore arranged between cylinder 301 and connector 303 can be avoided to
The reagent outflow of processing or the dust of outside, which enter in cavity 302 and connecting hole 304, to be polluted, while two gaskets 305
The filter screen 306 of middle part setting the adsorbent material 307 being located between two gaskets 305 can also be stopped, keep
Adsorbent material 307 is stable to be located in cavity 302 and handles the solution for flowing through cavity 302.307 two sides of adsorbent material are set
Pressing plate 308 is set, can further limit the position of adsorbent material 307, while two pressing plates can be adjusted by connecting rod 310
Spacing between 308, so that the loosening degree of adsorbent material 307 is adjusted, to adjust the stream that control solution flows through adsorbent material 307
Speed.
In the present embodiment, the cylinder 301 is vertically arranged, and the connecting hole 304 in the underlying connector 303 is
Feed opening, the connecting hole 304 in the connector 303 being located above are discharge hole.
In the present embodiment, active carbon adsorption column 002, the kieselguhr adsorption column 003, the cation exch ange adsorption resin
Column 004, the structure of the 4A molecular sieve adsorption column 005 are roughly the same, the difference is that：In the kieselguhr adsorption column 003
Adsorbent material be activating and regenerating type diatomite, the adsorbent material in the cation exch ange adsorption resin column 004 be activation again
Type resin cation is given birth to, the adsorbent material in the 4A molecular sieve adsorption column 005 is activating and regenerating type 4A molecular sieve.
In the present embodiment, the number of active carbon adsorption column 002 is at least two, and is connected in parallel, active carbon adsorption column 002
Length 80cm, diameter 20mm；The number of the kieselguhr adsorption column 003 is at least two, and is connected in parallel, kieselguhr adsorption
The length 80cm of column 003, diameter 20mm；The number of the cation exch ange adsorption resin column 004 is at least two, and parallel connection is even
It connects, the length 80cm of cation exch ange adsorption resin column 004, diameter 20mm；The number of the 4A molecular sieve adsorption column 005 is extremely
It is two few, and be connected in parallel, the length 80cm of 4A molecular sieve adsorption column 005, diameter 20mm.Filter 006 is 200nm pure poly- third
Alkene filter, model VP10-3/4-222//PFT 0.25-10UE-M3.
In the present embodiment, the Chromatographic Pure Methanol production system 100 further includes feedstock transportation pump 001, feedstock transportation pump 001
It is connect with the bottom of active carbon adsorption column 002, for being conveyed raw material into active carbon adsorption column 002 automatically.
In the present embodiment, the Chromatographic Pure Methanol production system 100 further includes nitrogen protection adsorption column regenerative system, nitrogen
Protection adsorption column regenerative system can provide nitrogen protection, and carry out heating cooling using baking oven.It is produced using Chromatographic Pure Methanol and is
System 100 can be to active carbon adsorption column 002, the kieselguhr adsorption column 003, the cation exch ange adsorption resin column 004, institute
The adsorbent material stated in 4A molecular sieve adsorption column 005 carries out activating and regenerating processing.
The production method of Chromatographic Pure Methanol production system 100 is：
(1) it using industrial grade benzenemethanol as raw material, is continuously conveyed by feedstock transportation pump 001 to active carbon adsorption column 002, and
Entered by 002 bottom of active carbon adsorption column, adsorbed by an active carbon adsorption column 002, control methanol is inhaled in active carbon
Flow velocity in attached column 002 is 1m/s.
(2) solution after activated carbon adsorption is entered by the bottom of kieselguhr adsorption column 003, is inhaled by a diatomite
Attached column 003 is adsorbed, and controlling flow velocity of the solution in kieselguhr adsorption column 003 is 1m/s.
(3) solution after kieselguhr adsorption is entered by the bottom of cation exch ange adsorption resin column 004, by one
It is adsorbed again in cation exch ange adsorption resin column 004, and controls solution in cation exch ange adsorption resin column 004
Flow velocity is 1m/s.
(4) solution after cation exch ange adsorption resin adsorption by 4A molecular sieve adsorption column 005 bottom, by one
Branch 4A molecular sieve adsorption column 005 is adsorbed, and controlling flow velocity of the solution in 4A molecular sieve adsorption column 005 is 1m/s.
(5) solution after the absorption of 4A molecular sieve is filtered by filter 006, is bottled after qualification after detecting,
Up to Chromatographic Pure Methanol product.
In above process, using nitrogen protection adsorption column regenerative system to another active carbon adsorption column 002, Ling Yizhi
Kieselguhr adsorption column 003, another cation exch ange adsorption resin column 004 and another 4A molecular sieve adsorption column 005 are lived
Change regeneration, it is specifically under nitrogen protection, cooling after being heated in 450 DEG C of baking oven, make the adsorbent reactivation in each column, activates
Regenerated active carbon adsorption column 002, kieselguhr adsorption column 003, cation exch ange adsorption resin column 004 and 4A molecular sieve adsorption column
005 device as online processing methanol next time, to guarantee the continuity of production.
Second embodiment
Referring to figure 3. and shown in Fig. 4, the present embodiment provides a kind of Chromatographic Pure Methanol production lines 300 comprising chromatographically pure first
Alcohol production system 200 and head tank 201, products pot 202, the structure and first embodiment of Chromatographic Pure Methanol production system 200
In Chromatographic Pure Methanol production system 100 structure it is roughly the same, the difference is that：The Chromatographic Pure Methanol of the present embodiment produces
The connecting rod 310 in active carbon adsorption column 203 in system 200 is connected with the handle 204 outside cylinder 301, by rotating handle
Hand 204 can drive connecting rod 310 to rotate, to adjust the distance between two pressure plates 308.The length of active carbon adsorption column 203
180cm, diameter 80mm；The length 180cm of kieselguhr adsorption column 003, diameter 80mm；Cation exch ange adsorption resin column 004
Length 180cm, diameter 80mm；The length 180cm of 4A molecular sieve adsorption column 005, diameter 80mm.In addition, the head tank 201 with
Active carbon adsorption column 203 connects, and feedstock transportation pump 001 is set to therebetween, and products pot 202 is connect with filter 006.
The production method of Chromatographic Pure Methanol production line 300 is：
(1) industrial grade benzenemethanol that will be stored in head tank 201 is continuously conveyed to active carbon by feedstock transportation pump 001 and is inhaled
Attached column 203, and entered by 203 bottom of active carbon adsorption column, it is adsorbed by an active carbon adsorption column 203, controls methanol
Flow velocity in active carbon adsorption column 203 is 0.2m/s.
(2) solution after activated carbon adsorption is entered by the bottom of kieselguhr adsorption column 003, is inhaled by a diatomite
Attached column 003 is adsorbed, and controlling flow velocity of the solution in kieselguhr adsorption column 003 is 0.2m/s.
(3) solution after kieselguhr adsorption is entered by the bottom of cation exch ange adsorption resin column 004, by one
It is adsorbed again in cation exch ange adsorption resin column 004, and controls solution in cation exch ange adsorption resin column 004
Flow velocity is 2m/s.
(4) solution after cation exch ange adsorption resin adsorption by 4A molecular sieve adsorption column 005 bottom, by one
Branch 4A molecular sieve adsorption column 005 is adsorbed, and controlling flow velocity of the solution in 4A molecular sieve adsorption column 005 is 2m/s.
(5) solution after the absorption of 4A molecular sieve is filtered by filter 006, storage in input product tank 202,
Up to Chromatographic Pure Methanol product.
In above process, using nitrogen protection adsorption column regenerative system to another active carbon adsorption column 203, Ling Yizhi
Kieselguhr adsorption column 003, another cation exch ange adsorption resin column 004 and another 4A molecular sieve adsorption column 005 are lived
Change regeneration, it is specifically under nitrogen protection, cooling after being heated in 400 DEG C of baking oven, make the adsorbent reactivation in each column, activates
Regenerated active carbon adsorption column 203, kieselguhr adsorption column 003, cation exch ange adsorption resin column 004 and 4A molecular sieve adsorption column
005 device as online processing methanol next time, to guarantee the continuity of production.
In conclusion the Chromatographic Pure Methanol production system of the utility model is easy to operate, and it is easy to use, it can purify to obtain
Chromatographic Pure Methanol；Large-scale chromatography is able to carry out by the Chromatographic Pure Methanol production line that above-mentioned Chromatographic Pure Methanol production system forms
Pure methanol production.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (9)
1. a kind of Chromatographic Pure Methanol production system, which is characterized in that it includes sequentially connected：
Active carbon adsorption column, for carrying out activated carbon adsorption；
Kieselguhr adsorption column, for carrying out kieselguhr adsorption；
Cation exch ange adsorption resin column, for carrying out ion exchange；
4A molecular sieve adsorption column, for carrying out 4A molecular sieve absorption；And
Filter, for being filtered；
The active carbon adsorption column includes the interior cylinder for being equipped with cavity, and the both ends of the cylinder are connected separately with dismountable connection
Head, the connector are equipped with the connecting hole being connected to the cavity, are equipped between the cylinder and each connector close
Packing, the middle part of the gasket are equipped with filter screen, and adsorbent material is equipped in the cavity, and the adsorbent material is active carbon,
The number of active carbon adsorption column is at least two, and is connected in parallel；The number of the kieselguhr adsorption column is at least two, and simultaneously
Connection connection；The number of the cation exch ange adsorption resin column is at least two, and is connected in parallel；The 4A molecular sieve adsorption column
Number be at least two, and be connected in parallel.
2. Chromatographic Pure Methanol production system according to claim 1, which is characterized in that be additionally provided with cloth up and down in the cavity
Two pressing plates set, the adsorbent material are set between two pressing plates, and multiple through-holes are offered on the pressing plate.
3. Chromatographic Pure Methanol production system according to claim 2, which is characterized in that two pressing plates are connected by connecting rod
It connects, the spacing between two pressing plates is adjustable.
4. Chromatographic Pure Methanol production system according to claim 1, which is characterized in that the cylinder is vertically arranged, and is located at
Connecting hole in the connector of lower section is feed opening, and the connecting hole in the connector being located above is discharge hole.
5. Chromatographic Pure Methanol production system according to claim 1, which is characterized in that the active carbon adsorption column, described
Kieselguhr adsorption column, the cation exch ange adsorption resin column, the structure of the 4A molecular sieve adsorption column are roughly the same, difference
Be in：Adsorbent material in the kieselguhr adsorption column is diatomite, the absorption in the cation exch ange adsorption resin column
Material is resin cation, and the adsorbent material in the 4A molecular sieve adsorption column is 4A molecular sieve.
6. Chromatographic Pure Methanol production system according to claim 1, which is characterized in that the Chromatographic Pure Methanol production system
Further include feedstock transportation pump, feedstock transportation pump is connect with the bottom of active carbon adsorption column, for raw material is conveyed automatically into
In active carbon adsorption column.
7. Chromatographic Pure Methanol production system according to claim 1, which is characterized in that the Chromatographic Pure Methanol production system
It further include nitrogen protection adsorption column regenerative system, nitrogen protection adsorption column regenerative system can provide nitrogen protection, and use baking oven
Carry out heating cooling.
8. a kind of Chromatographic Pure Methanol production line, which is characterized in that it includes the chromatography as described in any one of claims 1 to 7
Pure methanol production system.
9. Chromatographic Pure Methanol production line according to claim 8, which is characterized in that the Chromatographic Pure Methanol production line also wraps
Head tank, products pot are included, the head tank is connect with active carbon adsorption column, and products pot is connected to the filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721095631.1U CN208104258U (en) | 2017-08-29 | 2017-08-29 | chromatographic pure methanol production system and production line |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721095631.1U CN208104258U (en) | 2017-08-29 | 2017-08-29 | chromatographic pure methanol production system and production line |
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| CN208104258U true CN208104258U (en) | 2018-11-16 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107556161A (en) * | 2017-09-06 | 2018-01-09 | 湖北富森盐湖化工科技有限公司 | Chromatographic Pure Methanol and preparation method thereof, production system |
| CN109432869A (en) * | 2018-12-14 | 2019-03-08 | 广东百维生物科技有限公司 | For filtering the diatomite filter group and its control method of collagen |
-
2017
- 2017-08-29 CN CN201721095631.1U patent/CN208104258U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107556161A (en) * | 2017-09-06 | 2018-01-09 | 湖北富森盐湖化工科技有限公司 | Chromatographic Pure Methanol and preparation method thereof, production system |
| CN109432869A (en) * | 2018-12-14 | 2019-03-08 | 广东百维生物科技有限公司 | For filtering the diatomite filter group and its control method of collagen |
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