CN204779421U - Utilize device of novel catalysis rectification regular packing production methylal - Google Patents
Utilize device of novel catalysis rectification regular packing production methylal Download PDFInfo
- Publication number
- CN204779421U CN204779421U CN201520386535.7U CN201520386535U CN204779421U CN 204779421 U CN204779421 U CN 204779421U CN 201520386535 U CN201520386535 U CN 201520386535U CN 204779421 U CN204779421 U CN 204779421U
- Authority
- CN
- China
- Prior art keywords
- tower
- catalytic rectifying
- reactor
- rectifying column
- methylal
- 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.)
- Withdrawn - After Issue
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The utility model discloses an utilize device of novel catalysis rectification regular packing production methylal, the device include pre -reaction ware, catalytic reaction rectifying column and vacuum rectification tower, and wherein interior rectifying section of catalytic reaction rectification tata and etherification reaction section adopt the water conservancy diversion formula regular packing of windowing. Condensation reaction takes place with formalin at the pre -reaction ware and generates the methylal for methyl alcohol, and the catalytic reaction rectifying column is sent to by the pumping over to the reacted material, to supplying new methyl alcohol in the tower, further proceeds condensation reaction again, through the refinery distillation, and principal product methylal in catalytic reaction rectifying column top of the tower outflow, but adopt the methylal of vacuum rectification technique production purity more than 99.7%. The utility model discloses simple structure, effectual, maneuverability is strong, the formaldehyde conversion rate is high, easily enlargies the industrial production, and market prospect is wide.
Description
Technical field
The utility model relates to the device that a kind of catalytic reaction rectification produces methylal, belongs to technical field of petrochemical industry.
Background technology
Methylal has another name called Methylal(dimethoxymethane), it is a kind of important industrial chemicals, owing to having good physicochemical property, be widely used in the industries such as daily use chemicals, industrial automotive articles for use, makeup, medicine, household, rubber, paint, simultaneously, methylal has good ability of cleaning greasy dirt and volatility, and alternative F11 and F113 and chlorinated solvents, as novel cleaning, are the environmentfriendly products of replacement fluorine Leon.
The traditional preparation methods of methylal is that methyl alcohol and formaldehyde condensation reaction preparation occur under sulphuric acid catalysis and obtains, but this catalytic erosion is strong, and facility investment is high, and environmental pollution is serious, with present Green Development grave fault.In recent years, by using solid acid catalyst to prepare methylal, but the method product purity was lower, only can reach 85% ~ 93%, and methyl alcohol and methylal can form azeotropic again simultaneously, are difficult to obtain high-purity methylal.
Chinese patent CN102417442A, disclose a kind of preparation method of high-purity methylal, the method has highlighted the technological process preparing methylal, and the relevant information of catalytic filler in not mentioned catalytic rectifying tower, the inner stuffing for catalytic rectifying tower is not yet clear and definite.
Utility model content
Utility model object: the purpose of this utility model is for the deficiencies in the prior art, provides a kind of device utilizing new catalytic rectifying structured packing to produce methylal, effectively reduces the discharge of formaldehyde.
Technical scheme: a kind of device utilizing new catalytic rectifying structured packing to produce methylal described in the utility model, comprises pre-reactor, catalytic rectifying column and vacuum rectification tower;
Described pre-reactor is provided with pre-reactor opening for feed, pre-reactor discharge port;
Described catalytic rectifying column tower top is provided with catalytic rectifying column tower top discharge port, and middle part is provided with catalytic rectifying column methanol feeding mouth and catalytic rectifying column opening for feed, is provided with discharge port at the bottom of catalytic rectifying column tower at the bottom of tower;
Be provided with vacuum rectification tower opening for feed in the middle part of described vacuum rectification tower, tower top is provided with rectification under vacuum column overhead discharge port, is provided with discharge port at the bottom of vacuum rectification tower tower at the bottom of tower;
The pre-reactor discharge port of described pre-reactor connects the catalytic rectifying column opening for feed of catalytic rectifying column, the catalytic rectifying column tower top discharge port of described catalytic rectifying column connects the vacuum rectification tower opening for feed of vacuum rectification tower, and at the bottom of the vacuum rectification tower tower of described vacuum rectification tower, discharge port connects pre-reactor opening for feed;
The pre-reactor opening for feed of described pre-reactor is connected with pre-reactor methanol feed line, recycle methanol feeding line and formaldehyde solution feeding line.
Further, the rectifying section of described catalytic rectifying column and conversion zone adopt window diversion type structured packing.
As preferably, assembly A and the assembly B of two kinds of different structures is comprised in every layer of packing layer, assembly A be window diversion packing sheet external parcel silk screen, in fill out ion-exchange resin catalyst, assembly B is structured packing sheet, assembly A and assembly B stacks and curling, then fix with banding sheet, form catalytic rectification packing.
As replacement, assembly A and assembly B also can be alternately arranged vertical placement in every layer of packing layer.
Adopt the above-mentioned device utilizing new catalytic rectifying structured packing to produce methylal to carry out the technique of methylal production, comprise the steps:
1.1, formaldehyde solution and methanol solution are entered pre-reactor by pre-reactor opening for feed, carry out preliminary condensation reaction, reacted mixture is by the extraction of pre-reactor discharge port;
1.2, the mixture of step 1.1 extraction and the new methyl alcohol supplemented are entered in catalytic rectifying column by catalytic rectifying column opening for feed, catalytic rectifying column methanol feeding mouth respectively, there is condensation reaction further in unreacted formaldehyde and methyl alcohol, through refinery distillation, heavy constituent mixture distillates from discharge port at the bottom of catalytic rectifying column tower, and light constituent mixture distillates from catalytic rectifying column tower top discharge port;
1.3, the light constituent mixture that step 1.2 distillates enters vacuum rectification tower, and after rectifying, containing methylal from the extraction of rectification under vacuum column overhead discharge port, remaining ingredient is by discharge port extraction at the bottom of vacuum rectification tower tower;
1.4, the remaining ingredient of extraction in step 1.3 enters pre-reactor by recycle feed pipeline, circulating reaction.
As preferably, the working temperature of described pre-reactor is 50-85 DEG C, and pre-reactor working pressure is 0.01-0.5MPa, preferred 0.1-0.2MPa.
As preferably, the theoretical plate number of described catalytic rectifying column is 20-50 block, and working pressure is 0.01-0.2MPa, preferred 0.05-0.1MPa.
As preferably, the theoretical plate number of described vacuum rectification tower is 30-80 block, and working pressure is 0.01-0.08MPa, preferred 0.01-0.04MPa.
Compared with prior art, its beneficial effect is the utility model:
(1) structural shape of catalytic rectifying column adopts window diversion type structured packing catalyzer, effectively increases gas-liquid mass transfer area, improves gas-liquid mass transfer speed, improve mass-transfer efficiency further.
(2) whole device and technique, achieves being separated of methyl alcohol and methylal azeotropic system, by variable-pressure rectification technology, without the need to introduce the third material can extraction purity reach more than 99.7% methylal, and the rate of recovery of methylal reaches 99.0%.
(3) the utility model structure is simple, effective, transformation efficiency is high, is conducive to alternative chlorinated solvents, freonll-11, reduces topsoil, is an energy-conserving and environment-protective technology, meets industry development relevant policies.
Accompanying drawing explanation
The structural representation of Fig. 1 for utilizing new catalytic rectifying structured packing to produce the device of methylal described in embodiment 1.
Fig. 2 is that catalytic rectifying column packing layer assembly A and assembly B stacks and the vertical view of curling placement.
Fig. 3 to be catalytic rectifying column packing layer assembly A with assembly B be alternately arranged vertical vertical view placed.
Fig. 4 is the center section schematic diagram of Fig. 3.
In figure: 1-pre-reactor, 2-catalytic rectifying column, 3-vacuum rectification tower, 6-assembly A, 7-assembly B, a-methanol feeding, the charging of b-formaldehyde solution, c-supplements methanol feeding, by-product discharging after d-condensation, product discharge after e-condensation, the charging of f-Cycle Component, g-methylal product discharge, the discharging of h-remaining ingredient.
Embodiment
Below in conjunction with accompanying drawing, technical solutions of the utility model are described in detail, but protection domain of the present utility model is not limited to described embodiment.
Embodiment 1:
Utilize new catalytic rectifying structured packing to produce a device for methylal, comprise pre-reactor, catalytic rectifying column and vacuum rectification tower.
Described pre-reactor is provided with pre-reactor opening for feed, pre-reactor discharge port.
Described catalytic rectifying column tower top is provided with catalytic rectifying column tower top discharge port, and middle part is provided with catalytic rectifying column methanol feeding mouth and catalytic rectifying column opening for feed, is provided with discharge port at the bottom of catalytic rectifying column tower at the bottom of tower.
The rectifying section of described catalytic rectifying column and etherification reaction section adopt window diversion type structured packing, assembly A and the assembly B of two kinds of different structures is comprised in every layer of packing layer, assembly A be window diversion packing sheet external parcel silk screen, in fill out ion-exchange resin catalyst, assembly B is structured packing sheet, assembly A and assembly B stacks and curling, then fix with banding sheet, form catalytic rectification packing, as shown in Figure 2.
As replacement, assembly A and assembly B also can be alternately arranged vertical placement in every layer of packing layer, as shown in Figures 3 and 4.
Be provided with vacuum rectification tower opening for feed in the middle part of described vacuum rectification tower, tower top is provided with rectification under vacuum column overhead discharge port, is provided with discharge port at the bottom of vacuum rectification tower tower at the bottom of tower;
The pre-reactor discharge port of described pre-reactor connects the catalytic rectifying column opening for feed of catalytic rectifying column, the catalytic rectifying column tower top discharge port of described catalytic rectifying column connects vacuum rectification tower opening for feed, the circulation line opening for feed of the rectification under vacuum column overhead discharge port pre-reactor of described vacuum rectification tower;
The pre-reactor opening for feed of described pre-reactor is connected with pre-reactor methanol feed line, recycle methanol feeding line and formaldehyde solution feeding line.
In the present embodiment, the processing step adopting the above-mentioned device utilizing new catalytic rectifying structured packing to produce methylal to carry out methylal production is:
1.1, formaldehyde solution (massfraction is the formalin of 41.70%) and methyl alcohol are entered pre-reactor by pre-reactor opening for feed, carry out preliminary condensation reaction and generate methylal, wherein: methyl alcohol is 3.76 × 10 to the feed flow rates of pre-reactor
3kg/h, formaldehyde solution is 6.49 × 10 to the feed flow rates of pre-reactor
3kg/h, pre-reactor temperature is 55 DEG C, and pre-reactor working pressure is 0.10MPa, and reacted mixture is by the extraction of pre-reactor discharge port;
1.2, the mixture of step 1.1 extraction and the new methyl alcohol supplemented are entered in catalytic rectifying column by catalytic rectifying column opening for feed, catalytic rectifying column methanol feeding mouth respectively, there is condensation reaction further and produce methylal in unreacted formaldehyde and methyl alcohol, through refinery distillation, heavy constituent mixture distillates from discharge port at the bottom of catalytic rectifying column tower, and light constituent mixture distillates from catalytic rectifying column tower top discharge port; Heavy constituent mixture comprises a small amount of unreacted first alcohol and water, and light constituent mixture comprises methylal and a small amount of methyl alcohol and formaldehyde;
The stage number of catalytic rectifying column is 25 blocks of (rectifying section column plates 2nd ~ 5 pieces, catalyst reaction section column plate 6th ~ 19 pieces, stripping section column plate 20th ~ 24 pieces), the feed entrance point supplementing methyl alcohol is the 19th block of column plate, and the feed entrance point of the mixture of step 1.1 extraction is the 16th block of column plate.
Supplementary methyl alcohol is 2.03 × 10 to the feed flow rates of catalytic rectifying column
3kg/h, the working pressure of catalytic rectifying column is 0.10MPa.
1.3, the light constituent mixture that step 1.2 distillates enters vacuum rectification tower, and after rectifying, methylal product is from the extraction of rectification under vacuum column overhead discharge port, and remaining ingredient is by discharge port extraction at the bottom of vacuum rectification tower tower, and remaining ingredient is mainly methyl alcohol.
The stage number of vacuum rectification tower is 48 pieces, and feed entrance point is the 46th block of column plate, and working pressure is 0.015MPa.
1.4, the remaining ingredient of extraction in step 1.3 enters pre-reactor by recycle feed pipeline, circulating reaction.
The material of pre-reactor, catalytic rectifying column, vacuum rectification tower passes through pump delivery.
In pre-reactor, the transformation efficiency of formaldehyde is 46.04%, and after catalytic distillation reaction, the transformation efficiency of formaldehyde is 99.61%; After condensation reaction, the massfraction of the methylal of extraction is 97.21%.
Table 1: the flow rate of extraction at the bottom of pre-reactor discharge port, catalytic rectifying column tower top and tower in embodiment 1, the extraction of vacuum rectification tower product and cycling stream stock and composition
Embodiment 2:
A kind of device utilizing new catalytic rectifying structured packing to produce methylal adopted in the present embodiment is identical with the structure in embodiment 1.
In the present embodiment, the processing step adopting the above-mentioned device utilizing new catalytic rectifying structured packing to produce methylal to carry out methylal production is:
1.1, formaldehyde solution (massfraction is the formalin of 36.70%) and methyl alcohol are entered pre-reactor by pre-reactor opening for feed, carry out preliminary condensation reaction and generate methylal, wherein: methyl alcohol is 1.28 × 10 to the feed flow rates of pre-reactor
3kg/h, formaldehyde solution is 2.18 × 10 to the feed flow rates of pre-reactor
3kg/h, pre-reactor temperature is 60 DEG C, and pre-reactor working pressure is 0.10MPa, and reacted mixture is by the extraction of pre-reactor discharge port;
1.2, the mixture of step 1.1 extraction and the new methyl alcohol supplemented are entered in catalytic rectifying column by catalytic rectifying column opening for feed, catalytic rectifying column methanol feeding mouth respectively, there is condensation reaction further and produce methylal in unreacted formaldehyde and methyl alcohol, through refinery distillation, heavy constituent mixture distillates from discharge port at the bottom of catalytic rectifying column tower, and light constituent mixture distillates from catalytic rectifying column tower top discharge port; Heavy constituent mixture comprises a small amount of unreacted first alcohol and water, and light constituent mixture comprises methylal and a small amount of methyl alcohol and formaldehyde;
The stage number of catalytic rectifying column is 30 blocks of (rectifying section column plates 2nd ~ 7 pieces, catalyst reaction section column plate 8th ~ 28 pieces, stripping section column plate 28th ~ 29 pieces), the feed entrance point supplementing methyl alcohol is the 28th block of column plate, and the feed entrance point of the mixture of step 1.1 extraction is the 7th block of column plate.
Supplementary methyl alcohol is 314kg/h to the feed flow rates of catalytic rectifying column, and the working pressure of catalytic rectifying column is 0.1MPa.
1.3, the light constituent that step 1.2 distillates enters vacuum rectification tower, and after rectifying, methylal product is from the extraction of rectification under vacuum column overhead discharge port, and remaining ingredient is by discharge port extraction at the bottom of vacuum rectification tower tower, and remaining ingredient is mainly methyl alcohol.
The stage number of vacuum rectification tower is 70 pieces, and feed entrance point is the 70th block of column plate, and working pressure is 0.02MPa.
1.4, the remaining ingredient of extraction in step 1.3 enters pre-reactor by recycle feed pipeline, circulating reaction.
The material of pre-reactor, catalytic rectifying column, vacuum rectification tower passes through pump delivery.
In pre-reactor, the transformation efficiency of formaldehyde is 56.14%, and after catalytic distillation reaction, the transformation efficiency of formaldehyde is 99.74%; After condensation reaction, the massfraction of the methylal of extraction is 96.91%.
Table 2: the flow rate of extraction at the bottom of pre-reactor discharge port, catalytic rectifying column tower top and tower in embodiment 2, the extraction of vacuum rectification tower product and cycling stream stock and composition
Embodiment 3:
A kind of device utilizing new catalytic rectifying structured packing to produce methylal adopted in the present embodiment is identical with the structure in embodiment 1.
In the present embodiment, the processing step adopting the above-mentioned device utilizing new catalytic rectifying structured packing to produce methylal to carry out methylal production is:
1.1, formaldehyde solution (massfraction is the formalin of 39.10%) and methyl alcohol are entered pre-reactor by pre-reactor opening for feed, carry out preliminary condensation reaction and generate methylal, wherein: methyl alcohol is 6.78 × 10 to the feed flow rates of pre-reactor
3kg/h, formaldehyde solution is 1.02 × 10 to the feed flow rates of pre-reactor
4kg/h, pre-reactor temperature is 55 DEG C, and pre-reactor working pressure is 0.10MPa, and reacted mixture is by the extraction of pre-reactor discharge port;
1.2, the mixture of step 1.1 extraction and the new methyl alcohol supplemented are entered in catalytic rectifying column by catalytic rectifying column opening for feed, catalytic rectifying column methanol feeding mouth respectively, there is condensation reaction further and produce methylal in unreacted formaldehyde and methyl alcohol, through refinery distillation, heavy constituent mixture distillates from discharge port at the bottom of catalytic rectifying column tower, and light constituent mixture distillates from catalytic rectifying column tower top discharge port; Heavy constituent mixture comprises a small amount of unreacted first alcohol and water, and light constituent mixture comprises methylal and a small amount of methyl alcohol and formaldehyde;
The stage number of catalytic rectifying column is 21 blocks of (rectifying section column plates 2nd ~ 5 pieces, catalyst reaction section column plate 6th ~ 18 pieces, stripping section column plate 19th ~ 20 pieces), the feed entrance point supplementing methyl alcohol is the 14th block of column plate, and the feed entrance point of the mixture of step 1.1 extraction is the 12nd block of column plate.
Supplementary methyl alcohol is 2.02 × 10 to the feed flow rates of catalytic rectifying column
3kg/h, the working pressure of catalytic rectifying column is 0.08MPa.
1.3, the light constituent that step 1.2 distillates enters vacuum rectification tower, and after rectifying, methylal product is from the extraction of rectification under vacuum column overhead discharge port, and remaining ingredient is by discharge port extraction at the bottom of vacuum rectification tower tower, and remaining ingredient is mainly methyl alcohol.
The stage number of vacuum rectification tower is 44 pieces, and feed entrance point is the 44th block of column plate, and working pressure is 0.015MPa.
1.4, the remaining ingredient of extraction in step 1.3 enters pre-reactor by recycle feed pipeline, circulating reaction.
Pre-reactor, material between catalytic rectifying column and vacuum rectification tower pass through pump delivery.
In pre-reactor, the transformation efficiency of formaldehyde is 54.51%, and after catalytic distillation reaction, the transformation efficiency of formaldehyde is 99.82%; After condensation reaction, the massfraction of the methylal of extraction is 96.70%.
Table 3: the flow rate of extraction at the bottom of pre-reactor discharge port, catalytic rectifying column tower top and tower in embodiment 3, the extraction of vacuum rectification tower product and cycling stream stock and composition
As mentioned above, although represented with reference to specific preferred embodiment and described the utility model, it shall not be construed as the restriction to the utility model self.Under the spirit and scope prerequisite of the present utility model not departing from claims definition, various change can be made in the form and details to it.
Claims (4)
1. utilize new catalytic rectifying structured packing to produce a device for methylal, it is characterized in that: comprise pre-reactor, catalytic rectifying column and vacuum rectification tower;
Described pre-reactor is provided with pre-reactor opening for feed, pre-reactor discharge port;
Described catalytic rectifying column tower top is provided with catalytic rectifying column tower top discharge port, and middle part is provided with catalytic rectifying column methanol feeding mouth and catalytic rectifying column opening for feed, is provided with discharge port at the bottom of catalytic rectifying column tower at the bottom of tower;
Be provided with vacuum rectification tower opening for feed in the middle part of described vacuum rectification tower, tower top is provided with rectification under vacuum column overhead discharge port, is provided with discharge port at the bottom of vacuum rectification tower tower at the bottom of tower;
The pre-reactor discharge port of described pre-reactor connects the catalytic rectifying column opening for feed of catalytic rectifying column, the catalytic rectifying column tower top discharge port of described catalytic rectifying column connects vacuum rectification tower opening for feed, and discharge port at the bottom of the vacuum rectification tower tower of described vacuum rectification tower connects pre-reactor opening for feed;
The pre-reactor opening for feed of described pre-reactor is connected with pre-reactor methanol feed line, recycle methanol feeding line and formaldehyde solution feeding line.
2. the device utilizing new catalytic rectifying structured packing to produce methylal according to claim 1, is characterized in that, the rectifying section of described catalytic rectifying column and conversion zone adopt window diversion type structured packing.
3. the device utilizing new catalytic rectifying structured packing to produce methylal according to claim 2, it is characterized in that, assembly A and the assembly B of two kinds of different structures is comprised in every layer of packing layer, assembly A be window diversion packing sheet external parcel silk screen, in fill out ion-exchange resin catalyst, assembly B is structured packing sheet, assembly A and assembly B stacks and curling, then fixes with banding sheet, forms catalytic rectification packing.
4. according to claim 3ly utilize new catalytic rectifying structured packing to produce the device of methylal, it is characterized in that, assembly A and assembly B also can be alternately arranged vertical placement in every layer of packing layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520386535.7U CN204779421U (en) | 2015-06-04 | 2015-06-04 | Utilize device of novel catalysis rectification regular packing production methylal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520386535.7U CN204779421U (en) | 2015-06-04 | 2015-06-04 | Utilize device of novel catalysis rectification regular packing production methylal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204779421U true CN204779421U (en) | 2015-11-18 |
Family
ID=54519512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520386535.7U Withdrawn - After Issue CN204779421U (en) | 2015-06-04 | 2015-06-04 | Utilize device of novel catalysis rectification regular packing production methylal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204779421U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104876808A (en) * | 2015-06-04 | 2015-09-02 | 中建安装工程有限公司 | Device and process for producing methylal by utilizing novel catalytic distilled and structured packing |
| CN109956849A (en) * | 2017-12-22 | 2019-07-02 | 湖南中创化工股份有限公司 | A kind of method preparing ethylene acetate and sec-butyl alcohol and catalyst system and device |
-
2015
- 2015-06-04 CN CN201520386535.7U patent/CN204779421U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104876808A (en) * | 2015-06-04 | 2015-09-02 | 中建安装工程有限公司 | Device and process for producing methylal by utilizing novel catalytic distilled and structured packing |
| CN109956849A (en) * | 2017-12-22 | 2019-07-02 | 湖南中创化工股份有限公司 | A kind of method preparing ethylene acetate and sec-butyl alcohol and catalyst system and device |
| CN109956849B (en) * | 2017-12-22 | 2022-01-25 | 湖南中创化工股份有限公司 | Method for preparing ethylene glycol diacetate and sec-butyl alcohol, catalytic system and device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104876808A (en) | Device and process for producing methylal by utilizing novel catalytic distilled and structured packing | |
| CN106431924B (en) | A kind of power-economizing method of separating formic methyl esters-methanol-water mixtures | |
| CN104788294B (en) | The device of a kind of reactive distillation synthesizing glycol monobutyl ether and process | |
| CN105037094A (en) | Energy coupling distillation method for preparing ethyl alcohol by means of acetic acid ester hydrogenation | |
| CN101214923A (en) | Combined absorption analytical method for hydrochloric acid | |
| CN104478644B (en) | A kind of tert-butyl alcohol is prepared the method for isobutene | |
| CN110613946B (en) | Backpack reaction rectification equipment for synthesizing diethyl oxalate and process thereof | |
| CN110496576A (en) | A kind of synthesis of polymethoxy dimethyl ether and separation system | |
| CN105111079A (en) | Method and device for separating acetic acid sec-butyl ester and sec-butyl alcohol | |
| CN109438179A (en) | A kind of reactive distillation prepares the power-economizing method of isopropanol | |
| CN204779421U (en) | Utilize device of novel catalysis rectification regular packing production methylal | |
| CN103664656A (en) | Synthesis and application of quaternary ammonium salt ionic liquid based on heteropolyacid | |
| CN107501042A (en) | A kind of method that isopropanol is prepared by isopropyl acetate ester hydrolysis | |
| CN102795961B (en) | Device and method for synthesizing sec-butyl alcohol by continuous reaction-rectification | |
| CN104370740A (en) | Production method of isobornyl acetate | |
| CN105218305A (en) | A kind of byproduct recovery process of synthetic gas preparing ethylene glycol | |
| CN104557524A (en) | Production method of ethyl acetate | |
| CN104841149B (en) | Device and method for preparing high-purity methyl tertiary butyl ether by using partitioning plate catalytic rectifying tower | |
| CN204275534U (en) | A kind of dimethoxym ethane process for refining equipment of producing glyphosate by using glycine accessory substance | |
| CN203494193U (en) | Azeotropic rectifying device for separating propylene glycol monomethyl ether from water | |
| CN105985217B (en) | Reaction system and its application of reactant utilization rate are improved in a kind of production of chloromethanes | |
| CN203440262U (en) | Device for producing trans-1, 2-dichloroethylene with acetylene by adopting catalytic chlorination method | |
| CN204607890U (en) | A kind of device utilizing new catalytic rectifying structured packing to produce MTBE | |
| CN102701920A (en) | Method for purifying vinyl isobutyl ether | |
| CN113072425A (en) | Method for separating ethanol, cyclohexanol and water by extractive distillation-pressure swing distillation of dividing wall tower |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20151118 Effective date of abandoning: 20171020 |
|
| AV01 | Patent right actively abandoned |