CN105461513B - Method that is a kind of while preparing low-viscosity magnesium methoxide ionic liquid and high pressure hydrogen - Google Patents
Method that is a kind of while preparing low-viscosity magnesium methoxide ionic liquid and high pressure hydrogen Download PDFInfo
- Publication number
- CN105461513B CN105461513B CN201510784103.6A CN201510784103A CN105461513B CN 105461513 B CN105461513 B CN 105461513B CN 201510784103 A CN201510784103 A CN 201510784103A CN 105461513 B CN105461513 B CN 105461513B
- Authority
- CN
- China
- Prior art keywords
- methanol
- ionic liquid
- reaction
- hydrogen
- magnesium
- 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.)
- Active
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/68—Preparation of metal alcoholates
- C07C29/70—Preparation of metal alcoholates by converting hydroxy groups to O-metal groups
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
- C01B3/02—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
- C01B3/22—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by decomposition of gaseous or liquid organic compounds
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/02—Processes for making hydrogen or synthesis gas
- C01B2203/0266—Processes for making hydrogen or synthesis gas containing a decomposition step
- C01B2203/0272—Processes for making hydrogen or synthesis gas containing a decomposition step containing a non-catalytic decomposition step
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/06—Integration with other chemical processes
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/12—Feeding the process for making hydrogen or synthesis gas
- C01B2203/1205—Composition of the feed
- C01B2203/1211—Organic compounds or organic mixtures used in the process for making hydrogen or synthesis gas
- C01B2203/1217—Alcohols
- C01B2203/1223—Methanol
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Inorganic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention discloses method that is a kind of while preparing low-viscosity magnesium methoxide ionic liquid and high pressure hydrogen, operating procedure is that (1) magnesium powder and methanol are added in reaction kettle；(2) reaction kettle heater switch is opened, heat temperature raising closes heater switch after temperature rise to certain temperature, and magnesium powder and methanol react 1h~6h；(3) it is normal pressure that hydrogen to the reacting kettle inner pressure that reaction generates is released after reaction kettle cooling, and discharging takes liquid product that excessive methanol is distilled off, and remaining gained fusant is magnesium methoxide ionic liquid.Low-viscosity magnesium methoxide ionic liquid and high pressure hydrogen is prepared in the method for the present invention simultaneously, and preparation process is simple and direct, equipment is simple, reaction conversion ratio is high；The viscosity of the magnesium methoxide ionic liquid of gained low-viscosity is that 10mPaS~30mPaS is conducive to the application in terms of catalyst and extraction.Gained Hydrogen Vapor Pressure is prepared up to 1.0MPa~60.0MPa, purity is more than 99.99%.
Description
Technical field
The invention belongs to Chemical Reaction Engineering technical fields, and in particular to a kind of to prepare low-viscosity magnesium methoxide ion simultaneously
The method of liquid and high pressure hydrogen.
Background technology
Ionic liquid (ionic liquid), also known as ionic liquid at room temperature (room temperature ionic
Liquid), refer to the organic salt being made of completely anions and canons in room temperature or near room temperature.Ionic liquid and tradition are organic molten
Agent is compared with electrolyte solution, has following particular advantages：(1) non-volatile, nonflammable, conductive, catalysis, separation, coordinating, hand
Property etc. unique property, be a kind of special solvent and functional material；(2) high thermal stability, wide liquid temperature range, can
The acid-base property of tune, polarity, coordination ability and ionic liquid is set to become the dissolubility of organic matter, inorganic matter, polymer, gas etc.
The excellent reaction medium and catalyst of catalysis reaction and organic synthesis；(3) wide electrochemical stability window and high ionic conduction
Property, so that ionic liquid is become the electrolyte of good properties and the medium of electrochemistry formated in electrochemical applications；(4) adjustable polarity
Ionic liquid is set to detach in metal with dissolubility, protein purification, gas absorption field also show that unique advantage；(5) compared with
Low interface energy, interfacial tension and good dissolubility makes ionic liquid also be obtained widely in nano material synthesis field
Using；(6) toxicity is low, environmentally protective and recoverable.And the related manufacturing processes of ionic liquid are reported in technology today
Less, what is be related to is mostly the research of the edges such as the polishing fluid of ionic liquid.It can be seen that research and development prepared by ionic liquid are non-
It is often necessary.
Ionic-liquid catalyst of urea alcoholysis synthesizing diethyl carbonate and preparation method thereof (CN201210451580.7),
Provide it is a kind of by absolute ethyl alcohol, urea and catalyst preparation at ionic liquid-catalyzed urea alcoholysis synthesizing diethyl carbonate
Technique, catalyst are imidazoles metallic salt ionic liquid.Stir speed (S.S.) is 700~1000r/min during reaction, and reaction temperature is
160~230 DEG C, the reaction time is 4~10h.This method has many advantages, such as high recycling rate, non-corrosive, but prepare from
Required reaction temperature is high during sub- liquid catalyst, and energy consumption is big, needs to stir in reaction process, and there are the dynamic close of equipment
The problem of envelope and power consumption.
In terms of preparation in relation to hydrogen, the hydrogen manufacturing level in China rests on always in the general hydrogen production of low pressure, and high-purity high pressure
Hydrogen can only rely on import then due to a lack of advanced device for producing hydrogen.
A kind of device (CN201310628587.6) being prepared high pressure hydrogen using metal hydride, the disclosure of the invention are belonged to
In a kind of device preparing high pressure hydrogen using metal hydride of the static compress technical field of hydrogen, device is by control unit
The compositions such as part, heating circuit, cooling circuit, reaction bed, can be by 0.2MPa's using metal hydrides such as Ti-Mn bases, Ti-Cr bases
Hydrogen pressurization is to 20MPa, and pressure ratio reaches 100, and output gas purity reaches 99.999%, but the equipment is only limitted to hydrogen pressure
Contracting, and the input cost of equipment is higher.Zhu Gang's etc.《Methanol cracking on MgO carrier-borne transition metal catalysts prepares hydrogen》
Studies have shown that methanol can crack and prepare hydrogen-rich gas under catalyst, but reaction temperature is up to 600 DEG C, the requirement to equipment compared with
Height, while energy consumption is big, is unfavorable for industrial production preparation.
Being disclosed in the information of the background technology part, it is only intended to increase understanding of the overall background of the invention, without answering
It has been the prior art well known to persons skilled in the art when being considered as recognizing or imply that the information is constituted in any form.
Invention content
The purpose of the present invention is to provide a kind of while preparing the side of low-viscosity magnesium methoxide ionic liquid and high pressure hydrogen
A kind of method, it is desirable to provide the preparation method that technique is simple and direct, equipment is simple, reaction conversion ratio is high, products obtained therefrom quality is good.
To achieve the above object, technical solution provided by the invention is as follows：
Method that is a kind of while preparing low-viscosity magnesium methoxide ionic liquid and high pressure hydrogen, including following operating procedure：
(1) magnesium powder and methanol are added in reaction kettle, then to reaction kettle processing；
(2) reaction kettle heater switch is opened, heat temperature raising, when temperature rise is to closing heater switch after 40 DEG C~100 DEG C,
The reaction time of magnesium powder and methanol is 1h~6h in reaction kettle；
(3) reaction is released after reaction kettle cooling and generates gained hydrogen to reacting kettle inner pressure to normal pressure, and discharging takes liquid phase to produce
Excessive methanol is distilled off through distilling to 60 DEG C~90 DEG C in object, and institute is remaining that a light yellow clear starchiness fusant is methoxyl group
Magnesium ion liquid.
Preferably, the magnesium powder and methanol being added in step (1) are magnesium powder according to mass ratio：Methanol=1:2~1:10.
Preferably, the magnesium powder granularity described in step (1) is the mesh of 20 mesh~200.
Preferably, methanol described in step (1) is absolute methanol.
Preferably, it is to reaction kettle processing described in step (1)：Reaction kettle vacuumizes, and then uses N2To reaction kettle
Interior air is into line replacement.
Preferably, the vacuum degree vacuumized is 70.0kPa~95.0kPa；N2It is 2 times~5 times to replace number, is set
Change N used2Pressure is 0.1MPa/ times~0.5MPa/ times.
Preferably, reaction is released after reaction kettle described in step (3) cools down≤30 DEG C generates gained hydrogen.
Preferably, the viscosity of gained magnesium methoxide ionic liquid is 10mPaS~30mPaS in step (3).
Preferably, the pressure of gained hydrogen is 1.0MPa~60.0MPa in step (3), and purity is more than 99.99%.
The method of the present invention prepares gained magnesium methoxide ionic liquid and can serve as urging for esterification, condensation, cracking and cyclization
Agent, moreover it is possible to be used as inorganic adhesive, glue shear-strength is 15.0MPa~50.0MPa, and bonding strength in organic solvent
It is constant.
Compared with prior art, the present invention has the advantages that：
Low-viscosity magnesium methoxide ionic liquid and high pressure hydrogen, preparation process letter is prepared in preparation method of the present invention simultaneously
Victory, equipment is simple, reaction conversion ratio is high.In particular, it should be pointed out that methanol need not install agitating device with magnesium powder reaction kettle,
There is no the dynamic sealing problems of reaction kettle, are more advantageous to manufacture, operation, repair and the leakproof of high-tension apparatus；Gained low-viscosity
Magnesium methoxide ionic liquid is conducive to the application in terms of catalyst and extraction, while gained magnesium methoxide ionic liquid or one
The excellent inorganic adhesive of kind.Gained Hydrogen Vapor Pressure is prepared up to 1.0MPa~60.0MPa, purity is more than 99.99%.Further
Preparation method of the present invention there is no any " three wastes " discharge, be a kind of green clean manufacturing process.
Specific implementation mode
It is described in detail With reference to embodiment, it is to be understood that protection scope of the present invention is not by specific
The limitation of embodiment.Methanol used is absolute methanol purchased in market in embodiment.
Embodiment 1
It is 1 in mass ratio by magnesium powder and absolute methanol:2, wherein magnesium powder is 50g, granularity is 20 mesh；Absolute methanol 100g.
By in magnesium powder and absolute methanol input 2L autoclaves, vacuum degree is evacuated to autoclave after 70.0kPa, to use N2
Air in autoclave is replaced 2 times, the N replaced every time2Pressure be 0.1MPa, caused with preventing from remaining oxygen in kettle
It is dangerous.Autoclave heater switch is opened, heat temperature raising is closed heater switch when temperature rises to 40 DEG C, released by reaction
Heat is further continued for heating and is chemically reacted, and so that magnesium powder is reacted 6h in autoclave with methanol, then cools down autoclave
To 30 DEG C, releases after the hydrogen that reaction generates reaches normal pressure and discharge, take liquid-phase reaction product that excessive first is distilled off at 60 DEG C
Alcohol, remaining light yellow clear starchiness fusant are magnesium methoxide ionic liquid.Gained magnesium methoxide ionic liquid sticks
Degree is 10mPaS.The Hydrogen Vapor Pressure that reaction generates is 1.0MPa, purity 99.991%.
Embodiment 2
It is 1 in mass ratio by magnesium powder and absolute methanol:10, wherein magnesium powder is 50g, granularity is 200 mesh；Absolute methanol
500g.By in magnesium powder and absolute methanol input 2L autoclaves, it is 95.0kPa to be evacuated to vacuum degree to autoclave
Afterwards, N is used2Air in autoclave is replaced 5 times, the N replaced every time2Pressure be 0.5MPa, it is aerobic to prevent from remaining in kettle
Gas causes danger.Autoclave heater switch is opened, heat temperature raising closes heater switch, by reacting when temperature rises to 100 DEG C
The heat of releasing is further continued for heating and is chemically reacted, and so that magnesium powder is reacted 1h in autoclave with methanol, then by reaction under high pressure
Kettle is cooled to 30 DEG C, releases after the hydrogen that reaction generates reaches normal pressure and discharges, liquid-phase reaction product is taken to be distilled off at 90 DEG C
The methanol of amount, remaining light yellow clear starchiness fusant are magnesium methoxide ionic liquid.Gained magnesium methoxide ionic liquid
The viscosity of body is 30mPaS.The Hydrogen Vapor Pressure that reaction generates is 60.0MPa, purity 99.997%.
Embodiment 3
It is 1 in mass ratio by magnesium powder and absolute methanol:4, wherein magnesium powder is 50g, granularity is 30 mesh；Absolute methanol 200g.
By in magnesium powder and absolute methanol input 2L autoclaves, vacuum degree is evacuated to autoclave after 82.0kPa, to use N2
Air in autoclave is replaced 2 times, the N replaced every time2Pressure be 0.2MPa, caused with preventing from remaining oxygen in kettle
It is dangerous.Autoclave heater switch is opened, heat temperature raising is closed heater switch when temperature rises to 50 DEG C, released by reaction
Heat is further continued for heating and is chemically reacted, and so that magnesium powder is reacted 2h in autoclave with methanol, then cools down autoclave
To 25 DEG C, releases after the hydrogen that reaction generates reaches normal pressure and discharge, take liquid-phase reaction product that excessive first is distilled off at 70 DEG C
Alcohol, remaining light yellow clear starchiness fusant are magnesium methoxide ionic liquid.Gained magnesium methoxide ionic liquid sticks
Degree is 20mPaS.The Hydrogen Vapor Pressure that reaction generates is 20.0MPa, purity 99.992%.
Embodiment 4
It is 1 in mass ratio by magnesium powder and absolute methanol:8, wherein magnesium powder is 50g, granularity is 120 mesh；Absolute methanol 400g.
By in magnesium powder and absolute methanol input 2L autoclaves, vacuum degree is evacuated to autoclave after 90.0kPa, to use N2
Air in autoclave is replaced 4 times, the N replaced every time2Pressure be 0.4MPa, caused with preventing from remaining oxygen in kettle
It is dangerous.Autoclave heater switch is opened, heat temperature raising is closed heater switch when temperature rises to 70 DEG C, released by reaction
Heat is further continued for heating and is chemically reacted, and so that magnesium powder is reacted 1h in autoclave with methanol, then cools down autoclave
To 28 DEG C, releases after the hydrogen that reaction generates reaches normal pressure and discharge, take liquid-phase reaction product that excessive first is distilled off at 70 DEG C
Alcohol, remaining light yellow clear starchiness fusant are magnesium methoxide ionic liquid.Gained magnesium methoxide ionic liquid sticks
Degree is 20mPaS.The Hydrogen Vapor Pressure that reaction generates is 40.0MPa, purity 99.994%.
Embodiment 5
It is 1 in mass ratio by magnesium powder and absolute methanol:6, wherein magnesium powder is 50g, granularity is 90 mesh；Absolute methanol 300g.
By in magnesium powder and absolute methanol input 2L autoclaves, vacuum degree is evacuated to autoclave after 86.0kPa, to use N2
Air in autoclave is replaced 4 times, the N replaced every time2Pressure be 0.3MPa, caused with preventing from remaining oxygen in kettle
It is dangerous.Autoclave heater switch is opened, heat temperature raising is closed heater switch when temperature rises to 60 DEG C, released by reaction
Heat is further continued for heating and is chemically reacted, and so that magnesium powder is reacted 3h in autoclave with methanol, then cools down autoclave
To 20 DEG C, releases after the hydrogen that reaction generates reaches normal pressure and discharge, take liquid-phase reaction product that excessive first is distilled off at 80 DEG C
Alcohol, remaining light yellow clear starchiness fusant are magnesium methoxide ionic liquid.Gained magnesium methoxide ionic liquid sticks
Degree is 15mPaS.The Hydrogen Vapor Pressure that reaction generates is 30.0MPa, purity 99.993%.
Embodiment 6
It is 1 in mass ratio by magnesium powder and absolute methanol:9, wherein magnesium powder is 50g, granularity is 160 mesh；Absolute methanol 450g.
By in magnesium powder and absolute methanol input 2L autoclaves, vacuum degree is evacuated to autoclave after 92.0kPa, to use N2
Air in autoclave is replaced 5 times, the N replaced every time2Pressure be 0.5MPa, caused with preventing from remaining oxygen in kettle
It is dangerous.Autoclave heater switch is opened, heat temperature raising is closed heater switch when temperature rises to 90 DEG C, released by reaction
Heat is further continued for heating and is chemically reacted, and so that magnesium powder is reacted 5h in autoclave with methanol, then cools down autoclave
To 23 DEG C, releases after the hydrogen that reaction generates reaches normal pressure and discharge, take liquid-phase reaction product that excessive first is distilled off at 80 DEG C
Alcohol, remaining light yellow clear starchiness fusant are magnesium methoxide ionic liquid.Gained magnesium methoxide ionic liquid sticks
Degree is 28mPaS.The Hydrogen Vapor Pressure that reaction generates is 50.0MPa, purity 99.996%.
The viscosity that the present invention prepares gained magnesium methoxide ionic liquid is 10mPaS~30mPaS, gained Hydrogen Vapor Pressure
Up to 1.0MPa~60.0MPa, purity is more than 99.99%.The autoclave used in the method for the present invention need not be installed and be stirred
Mix device, the dynamic sealing and power consumption problem of autoclave be not present, be more advantageous to the manufacture of high-tension apparatus, operation, repair and
Leakproof.
The description of the aforementioned specific exemplary embodiment to the present invention is in order to illustrate and illustration purpose.These descriptions
It is not wishing to limit the invention to disclosed precise forms, and it will be apparent that according to the above instruction, can much be changed
And variation.The purpose of selecting and describing the exemplary embodiment is that explaining the specific principle of the present invention and its actually answering
With so that those skilled in the art can realize and utilize the present invention a variety of different exemplary implementation schemes and
Various chooses and changes.The scope of the present invention is intended to be limited by claims and its equivalents.
Claims (5)
1. method that is a kind of while preparing low-viscosity magnesium methoxide ionic liquid and high pressure hydrogen, which is characterized in that comprising following
Operating procedure：
(1) magnesium powder and methanol are added in reaction kettle, then to reaction kettle processing, i.e., reaction kettle vacuumizes, and then uses N2To reaction
Air is into line replacement in kettle；Wherein, the magnesium powder of addition and methanol are magnesium powder according to mass ratio：Methanol=1:4~1:8；
(2) reaction kettle heater switch is opened, heat temperature raising, when temperature rise is to closing heater switch, magnesium powder after 40 DEG C~100 DEG C
Reaction time with methanol is 1h~6h；
(3) reaction is released after reaction kettle cooling and generates gained hydrogen to reacting kettle inner pressure to normal pressure, and discharging takes liquid product to pass through
To 60 DEG C~90 DEG C to remove excessive methanol, institute is remaining that fusant is magnesium methoxide ionic liquid for distillation；Wherein, gained first
The viscosity of oxygroup magnesium ion liquid is 10mPaS~30mPaS；The pressure of gained hydrogen is 20MPa~40MPa.
2. method according to claim 1, it is characterised in that：Magnesium powder granularity described in step (1) is the mesh of 20 mesh~200.
3. method according to claim 1, it is characterised in that：Methanol described in step (1) is absolute methanol.
4. method according to claim 1, it is characterised in that：The vacuum degree vacuumized is 70.0kPa~95.0kPa；N2
It is 2 times~5 times to replace number, replaces N used2Pressure is 0.1MPa/ times~0.5MPa/ times.
5. method according to claim 1, it is characterised in that：Reaction kettle described in step (3) is released anti-after cooling down≤30 DEG C
Gained hydrogen should be generated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510784103.6A CN105461513B (en) | 2015-11-16 | 2015-11-16 | Method that is a kind of while preparing low-viscosity magnesium methoxide ionic liquid and high pressure hydrogen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510784103.6A CN105461513B (en) | 2015-11-16 | 2015-11-16 | Method that is a kind of while preparing low-viscosity magnesium methoxide ionic liquid and high pressure hydrogen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105461513A CN105461513A (en) | 2016-04-06 |
| CN105461513B true CN105461513B (en) | 2018-08-28 |
Family
ID=55599739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510784103.6A Active CN105461513B (en) | 2015-11-16 | 2015-11-16 | Method that is a kind of while preparing low-viscosity magnesium methoxide ionic liquid and high pressure hydrogen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105461513B (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10045356A1 (en) * | 2000-09-14 | 2002-03-28 | Degussa | Process for the production of magnesium methoxide |
| CN1152851C (en) * | 2001-09-03 | 2004-06-09 | 广西大学 | Method and apparatus for synthesizing dimethyl carbonate |
| EP1505084A4 (en) * | 2002-05-10 | 2005-11-16 | Idemitsu Kosan Co | Solid catalyst component for olefin polymerization, catalyst for olefin polymerization and method for producing olefin polymer |
-
2015
- 2015-11-16 CN CN201510784103.6A patent/CN105461513B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN105461513A (en) | 2016-04-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102816045B (en) | Method for synthesizing chloromethane by tail gas generated during chloroacetic acid production | |
| CN109503375A (en) | A kind of production technology for the heterogeneous catalysis methyl ethyl carbonate that is coupled | |
| CN108409637A (en) | A kind of light stabilizer intermediate N- butyl -2,2, the preparation process of 6,6- tetramethyl -4- piperidinamines | |
| CN202700497U (en) | Vacuum coating reaction device | |
| CN210787302U (en) | Device for continuously producing high-purity potassium alkoxide or sodium alkoxide by using microchannel reactor | |
| CN105646786A (en) | Method for preparing dicyclopentadiene hydrogenated petroleum resin from dicyclopentadiene directly | |
| CN103819344B (en) | A kind of synthetic method of 1,2-propylene diamine | |
| CN105461513B (en) | Method that is a kind of while preparing low-viscosity magnesium methoxide ionic liquid and high pressure hydrogen | |
| CN107570158B (en) | Method for improving quality of biomass-based polyol through hydrogenation | |
| CN104383949B (en) | A kind of Ketocyclopentane catalyst for synthesizing and preparation method thereof and the application in Ketocyclopentane synthesizes | |
| CN106366066A (en) | Method of recycling SO2 through compression/condensation during production process of sulfolane | |
| CN103865052B (en) | A kind of poly (propylene carbonate) polyol production process | |
| CN105233830B (en) | A kind of preparation method and applications of cobalt carbonyl catalyst | |
| CN108085039A (en) | A kind of method that biomass by hydro-thermal liquefaction bio oil is modified | |
| CN106588657A (en) | Method for synthesizing dimethyl carbonate | |
| CN108715575A (en) | Solid super base is the method that catalyst fixed bed reaction prepares dihydroxypropane single-ether | |
| CN105523982A (en) | Method for preparing tert-butyl hydroperoxide | |
| CN108003073A (en) | The preparation method of amino-phenyl-beta-hydroxyethyl sulfone and p-aminophenyl-beta-hydroxyethyl sulfone sulphonic acid ester | |
| CN108440250B (en) | Process for preparing dihydroxy anthraquinone leuco body | |
| CN103936568B (en) | A kind of method being prepared by methoxy toluene to p-methoxybenzyl alcohol | |
| CN108658781A (en) | A kind of preparation method of p-phenylenediamine | |
| CN103772153B (en) | The synthetic method of the chloro-3-cresols of 4-and system thereof | |
| CN103130608B (en) | Preparation method of trifluoroethylene | |
| CN102963884B (en) | Preparation method of reinforced flexible graphite | |
| CN104630490B (en) | Method for preparing ammonium tungstate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |