CN203790608U - Polymer solvent continuous removal-recovery system for water-based oil repellent mold discharging agent - Google Patents
Polymer solvent continuous removal-recovery system for water-based oil repellent mold discharging agent Download PDFInfo
- Publication number
- CN203790608U CN203790608U CN201420177644.3U CN201420177644U CN203790608U CN 203790608 U CN203790608 U CN 203790608U CN 201420177644 U CN201420177644 U CN 201420177644U CN 203790608 U CN203790608 U CN 203790608U
- Authority
- CN
- China
- Prior art keywords
- tower joint
- condenser
- solvent
- storage tank
- product storage
- 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.)
- Expired - Lifetime
Links
- 239000002904 solvent Substances 0.000 title claims abstract description 53
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 238000011084 recovery Methods 0.000 title claims abstract description 16
- 229920000642 polymer Polymers 0.000 title claims abstract description 14
- 238000007599 discharging Methods 0.000 title abstract 5
- 230000002940 repellent Effects 0.000 title abstract 5
- 239000005871 repellent Substances 0.000 title abstract 5
- 239000012043 crude product Substances 0.000 claims abstract description 18
- 239000000047 product Substances 0.000 claims abstract description 16
- 230000008676 import Effects 0.000 claims description 33
- 239000007789 gas Substances 0.000 claims description 24
- 239000007792 gaseous phase Substances 0.000 claims description 23
- 239000012071 phase Substances 0.000 claims description 23
- 239000010409 thin film Substances 0.000 claims description 22
- 239000000945 filler Substances 0.000 claims description 6
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 4
- 239000003643 water by type Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 7
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 125000004122 cyclic group Chemical group 0.000 abstract 1
- 239000000463 material Substances 0.000 description 9
- 239000000839 emulsion Substances 0.000 description 7
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 4
- 230000006837 decompression Effects 0.000 description 4
- 238000004807 desolvation Methods 0.000 description 4
- 238000004821 distillation Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000470 constituent Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 235000006708 antioxidants Nutrition 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 230000001804 emulsifying effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011344 liquid material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 235000011888 snacks Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
Landscapes
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The utility model discloses a polymer solvent continuous removal-recovery system for a water-based oil repellent mold discharging agent. The system comprises a crude product storage tank, a constant temperature heat exchanger, a measuring pump, a film evaporator, an oil repellent mold discharging agent product storage tank, a rectifying tower, a first condenser, a second condenser and a solvent receiving tank. A bottom outlet of the crude product storage tank is connected with the top of the constant temperature heat exchanger, and the bottom of the constant temperature heat exchanger is connected with the film evaporator through the measuring pump. A bottom outlet of the film evaporator is connected with the top end of the oil repellent mold discharging agent product storage tank, a bottom outlet of the rectifying tower is connected with the top of the crude product storage tank, and a bottom outlet of the first condenser and a bottom outlet of the second condenser are both connected with the top end of the solvent receiving tank. By means of the polymer solvent continuous removal-recovery system, continuous solvent removal and recovery can be achieved, the quality of the obtained water-based oil repellent mold discharging agent is stable, the purity of recovered solvent is high, the moisture of the recovered solvent is low, the cyclic utilization index requirement is met, solvent removal and recovery are conducted synchronously, the technological process is shortened, and energy consumption is greatly lowered.
Description
Technical field
The utility model relates to fluorine-containing aqueous and refuses the production equipment of solvent removal-recycle and reuse link in oil release agent production process, relates in particular to a kind of water-based and refuses remove continuously-recovery system of oil release agent polymer solvent.
Background technology
It is a kind of linear fluorochemical polymeric surfactants that water-based is refused oil release agent, be mainly used in adding in disposable paper pulp molding snack container, give the demoulding, waterproof, the oil preventing performance of tableware excellence, and just can natural degradation in 6 months after using, be the environment-protection type tableware of promotion use energetically of current America and Europe, Japan and other countries.Water-based is refused oil release agent production method, and the first step is that various function monomers carry out polymerization at solution; Second step is to add the auxiliary agent emulsifications such as water, acid, oxidant; The 3rd step is that batch (-type) decompression distillation steams solvent, obtains water-based and refuses oil release agent emulsion.As the method for patent activating denatured protein (application number: CN97195478.X, notification number: CN1222191, the day for announcing: 1999.07.07), copolymer, paper inorganic agent and converted paper (application number: CN03813542.6, notification number: CN1659197, the day for announcing: 2005.08.24) be all to adopt batch (-type) decompression distillation to steam solvent, obtain water-based and refuse oil release agent emulsion.
There is following shortcoming in the equipment of existing batch (-type) decompression distillation desolvation: in the solvent that (1) distills out, contains 5%～50% moisture content, need further to adopt rectifying column rectification and purification; (2) long-play vacuum is unstable, and material is easy to foaming under vacuum condition to be taken away by vacuum, and between batch, product quality fluctuation is larger; (3) separated from solvent is not thorough, and a small amount of dissolvent residual is refused in oil release agent in water-based; (4) a small amount of solvent gas is discharged in atmosphere by vavuum pump, causes environmental pollution.
Utility model content
The utility model object is to provide a kind of water-based to refuse the technical scheme of remove continuously-recovery system of oil release agent polymer solvent for the existing deficiency of prior art, make desolvation continous-stable, and solvent is carried out the system of rectifying purifying in the process of desolvation, realize whole process continuously, steadily, energy consumption is low, pollution-free, the constant product quality obtaining, recovered solvent purity is high, adopt multi-stage condensing mode, avoided solvent by causing secondary pollution in vavuum pump entered environment.
In order to solve the problems of the technologies described above, the utility model adopts following technical scheme:
A kind of water-based is refused remove continuously-recovery system of oil release agent polymer solvent, it is characterized in that: system comprises crude product storage tank, constant temperature heat exchanger, measuring pump, thin film evaporator, refuses oil release agent product storage tank, rectifying column, the first condenser, the second condenser and solvent receiving slit, the outlet at bottom of crude product storage tank connects the top of constant temperature heat exchanger, the bottom of constant temperature heat exchanger connects thin film evaporator by measuring pump, the outlet at bottom of thin film evaporator connects the top of refusing oil release agent product storage tank, is provided with the first gaseous phase outlet on thin film evaporator; Rectifying column by the first tower save, the second tower joint and the 3rd tower joint form, the top and bottom of the first tower joint are respectively equipped with the first tower joint JO and the import of the first tower joint chuck, the upper end of the second tower joint is provided with the second tower joint JO, the lower end of the second tower joint is provided with the second tower joint chuck import and the first gas phase import, the first gas phase import connects the first gaseous phase outlet, the upper end of the 3rd tower joint is provided with the 3rd tower joint JO and the second gaseous phase outlet, the lower end of the 3rd tower joint is provided with the 3rd tower joint chuck import, and the outlet at bottom of rectifying column connects the top of crude product storage tank; The bottom of the first condenser is provided with the second gas phase import, and the second gas phase import connects the second gaseous phase outlet, and the top of the first condenser is provided with the 3rd gaseous phase outlet; The bottom of the second condenser is provided with the 3rd gas phase import, and the 3rd gas phase import connects the 3rd gaseous phase outlet; The outlet at bottom of the first condenser, the second condenser all connects the top of solvent receiving slit.In crude product storage tank, material utilizes potential difference to enter in constant temperature heat exchanger, after constant temperature heat exchanger constant temperature, maintain material in uniform temperature, enter in thin film evaporator with constant flow by measuring pump, material separates in thin film evaporator, and heavy constituent is refused oil release agent emulsion and entered and refuse oil release agent product storage tank; Light component solvent-steam enters rectifying column the second tower joint middle part by thin film evaporator gaseous phase outlet, solvent-water mixed vapour separates in rectifying column, by the tower joint in three different temperatures regions, acetone steam enters the first condenser, the second condenser, condense in solvent storage tank, steam in rectifying column condensing reflux in crude product storage tank.
Further, the filler of the first tower joint is silk screen, and the filler of the second tower joint and the 3rd tower joint is carborundum, and stable chemical performance, the thermal conductivity factor of carborundum are high, thermal coefficient of expansion is little, good energy-conserving effect, and when high temperature, energy is anti-oxidant.
Further, the exchange media of the first condenser chuck is industry water.
Further, the medium of the exchange media of the second condenser chuck and solvent receiving slit chuck is-35 DEG C of recirculated waters, is conducive to using water wisely, reduces costs.
The utility model, owing to having adopted technique scheme, has following beneficial effect:
1, water-based of the present utility model is refused remove continuously-recovery system of oil release agent polymerization solvent, and not only desolvation obtains qualified water-based and refuses oil release agent emulsion continuously, can reach the solvent that recycles index simultaneously.
2, the utility model solvent to remove with reclaiming be to carry out under constant Parameter Conditions, what obtain refuses oil release agent finished product and recovered solvent steady quality, there will not be batch (-type) decompression distillation to obtain existing between product batches mass discrepancy.
3, removing of the utility model solvent carried out with recycling to synchronize, and shortened process, has saved energy consumption greatly, and influence factor is fewer, and manipulation is simple.
4, removing of the utility model solvent carried out with recycling under condition of normal pressure, adopts multi-stage condensing mode, avoided solvent by vavuum pump entered environment, causes secondary pollution.
Brief description of the drawings
Below in conjunction with accompanying drawing, the utility model is described in further detail:
Fig. 1 is that a kind of water-based of the utility model is refused the structural representation of remove continuously-recovery system of oil release agent polymer solvent.
In figure, 1-crude product storage tank;
2-refuses oil release agent product storage tank;
3-constant temperature heat exchanger;
4-measuring pump;
5-thin film evaporator; 51-the first gaseous phase outlet;
6-rectifying column; 61-the first tower joint; 611-the first tower joint JO; 612-the first tower joint chuck import; 62-the second tower joint; 621-the second tower joint JO; 622-the second tower joint chuck import; 63-the 3rd tower joint; 631-the 3rd tower joint JO; 632-the 3rd tower joint chuck import; 64-the first gas phase import; 65-the second gaseous phase outlet;
7-the first condenser; 71-the second gas phase import; 72-the 3rd gaseous phase outlet;
8-the second condenser; 81-the 3rd gas phase import;
10-solvent receiving slit.
Detailed description of the invention
As shown in Figure 1, for a kind of water-based of the utility model is refused remove continuously-recovery system of oil release agent polymer solvent, system comprises crude product storage tank 1, constant temperature heat exchanger 3, measuring pump 4, thin film evaporator 5, refuse oil release agent product storage tank 2, rectifying column 6, the first condenser 7, the second condenser 8 and solvent receiving slit 10, the outlet at bottom of crude product storage tank 1 connects the top of constant temperature heat exchanger 3, the bottom of constant temperature heat exchanger 3 connects thin film evaporator 5 by measuring pump 4, the outlet at bottom of thin film evaporator 5 connects the top of refusing oil release agent product storage tank 2, on thin film evaporator 5, be provided with the first gaseous phase outlet 51, rectifying column 6 is by the first tower joint 61, the second tower joint 62 and the 3rd tower joint 63 compositions, the filler of the first tower joint 61 is silk screen, the filler of the second tower joint 62 and the 3rd tower joint 63 is carborundum, the top and bottom of the first tower joint 61 are respectively equipped with the first tower joint JO 611 and the first tower joint chuck import 612, the upper end of the second tower joint 62 is provided with the second tower joint JO 621, the lower end of the second tower joint 62 is provided with the second tower joint chuck import 622 and the first gas phase import 64, the first gas phase import 64 connects the first gaseous phase outlet 51, the upper end of the 3rd tower joint 63 is provided with the 3rd tower joint JO 631 and the second gaseous phase outlet 65, the lower end of the 3rd tower joint 63 is provided with the 3rd tower joint chuck import 632, the outlet at bottom of rectifying column 6 connects the top of crude product storage tank 1, the bottom of the first condenser 7 is provided with the top that the second gas phase import 71, the second gas phase imports 71 connect the second gaseous phase outlet 65, the first condensers 7 and is provided with the 3rd gaseous phase outlet 72, the bottom of the second condenser 8 is provided with the 3rd gas phase import 81, the three gas phase imports 81 and connects the 3rd gaseous phase outlet 72, the outlet at bottom of the first condenser 7, the second condenser 8 all connects the top of solvent receiving slit 10, and the exchange media of the first condenser 7 chucks is industry water, and the medium of the exchange media of the second condenser 8 chucks and solvent receiving slit 10 chucks is-35 DEG C of recirculated waters.In crude product storage tank 1, material utilizes potential difference to enter in constant temperature heat exchanger 3, after constant temperature heat exchanger 3 constant temperature, maintain material in uniform temperature, enter in thin film evaporator 5 with constant flow by measuring pump 4, material separates in thin film evaporator 5, and heavy constituent is refused oil release agent emulsion and entered and refuse oil release agent product storage tank 2; Light component solvent-steam enters rectifying column 6 second towers by thin film evaporator 5 gaseous phase outlets and saves 62 middle parts, solvent-water mixed vapour separates in rectifying column 6, by the tower joint in three different temperatures regions, acetone steam enters the first condenser 7, the second condenser 8, condense in solvent storage tank, steam in rectifying column 6 condensing reflux in crude product storage tank 1.
Operation principle of the present utility model is: emulsifying liquid material (containing water, water-soluble fluorine-containing polymer, solvent etc.) enters in constant temperature heat exchanger 3, utilize constant temperature heat exchanger 3 to stablize the temperature of material, utilize measuring pump 4 that constant temperature material is at the uniform velocity entered in thin film evaporator 5, thin film evaporator 5 is that water-based is refused oil release agent emulsion and solvent-aqueous vapor phase two parts feed separation, wherein to refuse oil release agent emulsion be heavy constituent to water-based, entered and refused in oil release agent product storage tank 2 by thin film evaporator 5 outlet at bottoms.Light component solvent-aqueous vapor enters in rectifying column 6 mutually, the gas phase that enters rectifying column 6 is divided into two parts, solvent vapour saves 63 insulation effects by the second tower joint 62, the 3rd tower of rectifying column 6, enter in condenser, being condensed into liquid enters in solvent receiving slit 10, part steam saves at 62 o'clock because temperature is inadequate by the second tower, and liquefaction flows into bottom column joint; Partially liq solvent and liquid water enter rectifying column 6 bottom column joints, and through the first tower joint 61 heating, solvent gasification, enters the second tower joint 62, saves 63 insulation effects by the second tower joint 62 and the 3rd tower, and solvent gas phase enters in condenser; Water in the first tower joint 61, because temperature can not gasify not, flows in crude product storage tank 1 by back of pipeline.
These are only specific embodiment of the utility model, but technical characterictic of the present utility model is not limited to this.Any taking the utility model as basis, for realizing essentially identical technique effect, do ground simple change, be equal to replacement or modification etc., be all covered by among protection domain of the present utility model.
Claims (4)
1. a water-based is refused remove continuously-recovery system of oil release agent polymer solvent, it is characterized in that: described system comprises crude product storage tank, constant temperature heat exchanger, measuring pump, thin film evaporator, refuse oil release agent product storage tank, rectifying column, the first condenser, the second condenser and solvent receiving slit, the outlet at bottom of described crude product storage tank connects the top of described constant temperature heat exchanger, the bottom of described constant temperature heat exchanger connects described thin film evaporator by described measuring pump, the top of refusing oil release agent product storage tank described in the outlet at bottom of described thin film evaporator connects, on described thin film evaporator, be provided with the first gaseous phase outlet, described rectifying column is saved by the first tower, the second tower joint and the 3rd tower joint composition, the top and bottom of described the first tower joint are respectively equipped with the first tower joint JO and the import of the first tower joint chuck, the upper end of described the second tower joint is provided with the second tower joint JO, the lower end of described the second tower joint is provided with the second tower joint chuck import and the first gas phase import, described the first gas phase import connects described the first gaseous phase outlet, the upper end of described the 3rd tower joint is provided with the 3rd tower joint JO and the second gaseous phase outlet, the lower end of described the 3rd tower joint is provided with the 3rd tower joint chuck import, the outlet at bottom of described rectifying column connects the top of described crude product storage tank, the bottom of described the first condenser is provided with the second gas phase import, and described the second gas phase import connects described the second gaseous phase outlet, and the top of described the first condenser is provided with the 3rd gaseous phase outlet, the bottom of described the second condenser is provided with the 3rd gas phase import, and described the 3rd gas phase import connects described the 3rd gaseous phase outlet, the outlet at bottom of described the first condenser, described the second condenser all connects the top of described solvent receiving slit.
2. a kind of water-based according to claim 1 is refused remove continuously-recovery system of oil release agent polymer solvent, it is characterized in that: the filler of described the first tower joint is silk screen, and the filler of described the second tower joint and described the 3rd tower joint is carborundum.
3. a kind of water-based according to claim 1 is refused remove continuously-recovery system of oil release agent polymer solvent, it is characterized in that: the exchange media of described the first condenser chuck is industry water.
4. a kind of water-based according to claim 1 is refused remove continuously-recovery system of oil release agent polymer solvent, it is characterized in that: the medium of the exchange media of described the second condenser chuck and described solvent receiving slit chuck is-35 DEG C of recirculated waters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420177644.3U CN203790608U (en) | 2014-04-14 | 2014-04-14 | Polymer solvent continuous removal-recovery system for water-based oil repellent mold discharging agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420177644.3U CN203790608U (en) | 2014-04-14 | 2014-04-14 | Polymer solvent continuous removal-recovery system for water-based oil repellent mold discharging agent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203790608U true CN203790608U (en) | 2014-08-27 |
Family
ID=51372883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420177644.3U Expired - Lifetime CN203790608U (en) | 2014-04-14 | 2014-04-14 | Polymer solvent continuous removal-recovery system for water-based oil repellent mold discharging agent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203790608U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105524243A (en) * | 2016-02-02 | 2016-04-27 | 上海华峰材料科技研究院（有限合伙） | Solvent removal method for waterborne polyurethane production process |
-
2014
- 2014-04-14 CN CN201420177644.3U patent/CN203790608U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105524243A (en) * | 2016-02-02 | 2016-04-27 | 上海华峰材料科技研究院（有限合伙） | Solvent removal method for waterborne polyurethane production process |
| CN105524243B (en) * | 2016-02-02 | 2018-08-31 | 上海华峰新材料研发科技有限公司 | The method that aqueous polyurethane production process removes solvent |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105418368B (en) | A kind of technique and device for producing high straight alcohol | |
| CN102580338B (en) | Method for continuously rectifying 3-chloropropyl triethoxysilane | |
| CN102766016B (en) | Method for recovering octafluoropropane from hexafluoropropylene production process | |
| CN103351321B (en) | The continuous production method of a kind of NMP | |
| CN102584544B (en) | Process for separating ethylene glycol monomethyl ether and water with intermittent azeotropic distillation method | |
| CN103145577A (en) | Method and equipment for recycling dimethylacetamide from waste pharmaceutical liquor and thermal coupling method | |
| CN104529703A (en) | Separation system and separation method of low-carbon mixed alcohol | |
| CN203790608U (en) | Polymer solvent continuous removal-recovery system for water-based oil repellent mold discharging agent | |
| CN102126917A (en) | High purity recycling and energy integration technology for different concentrations of dichloromethane wastewater | |
| CN114669073A (en) | 1,4-butanediol multi-effect rectification device system and multi-effect rectification process | |
| CN103396297A (en) | Thermal coupling energy saving system and operation method for recovering organism from propylene epoxidation reaction wastewater | |
| CN103910605B (en) | The technique of a kind of infiltration evaporation system and refined biological propyl carbinol thereof | |
| CN104086363A (en) | Energy-saving process for recycling n-butyl acetate and butyl alcohol from waste acid water | |
| CN206467171U (en) | Reclaim, purify the device of N methyl pyrrolidones | |
| CN104692326A (en) | Hydrogen recycling method | |
| CN105585429B (en) | The recovery method of ethanol | |
| CN214830035U (en) | Optimized separation system for maleic anhydride direct hydrogenation reaction product | |
| CN216366648U (en) | MVR combines with recovery tower to be used for device that weak alcohol retrieved | |
| CN102764559B (en) | Combined technique of separating and recycling VOCS (volatile organic compounds) from industrial waste gas by adsorption-desorption-rectification-pervaporation | |
| CN110922347B (en) | Method for separating N-methyl pyrrolidone from large-amount chloroform system | |
| CN109438186B (en) | Industrial production method of high-purity sec-octanol | |
| CN211078990U (en) | NMP dewatering device | |
| CN113813625A (en) | Device and method for recovering light alcohol by combining MVR with recovery tower | |
| CN109134258A (en) | A kind of product separating technology of prepared by dimethyl oxalate plus hydrogen methyl glycollate | |
| CN105348043A (en) | Separating and recycling method and device for solvent-water mixture containing impurities prone to scale formation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140827 |
|
| CX01 | Expiry of patent term |