CN103130614A - Method for preparing 1,2-cyclohexanediol through oxidation of cyclohexene - Google Patents
Method for preparing 1,2-cyclohexanediol through oxidation of cyclohexene Download PDFInfo
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Abstract
The invention provides a method for preparing 1,2-cyclohexanediol through oxidation of cyclohexene. The method includes the step of enabling cyclohexene, hydrogen peroxide aqueous solution to contact with a titanium silicate molecular sieve catalyst in organic solvent under an oxidizing reaction condition, wherein the contact is carried out on the condition that acidic materials exist. Through adoption of the method, the 1,2-cyclohexanediol can be obtained from direct oxidization of the cyclohexene, the conversion rate of the cyclohexene is high, and the yield coefficient of target products, namely the 1,2-cyclohexanediol, is high. The method is environment-friendly and suitable for industrialized application.
Description
Technical field
The present invention relates to a kind of method that cyclohexene oxide prepares 1,2-cyclohexanediol.
Background technology
1,2-cyclohexanediol is white crystals, and molecular formula is C
6H
12O
2, molecular weight is 116.16, it has suitable, anti-two kinds of isomer, is respectively cis-1,2-cyclohexanediol and anti-form-1,2-cyclohexanediol.Cis-1,2-cyclohexanediol fusing point is 97-99 ℃, anti-form-1,2-cyclohexanediol fusing point is 102-104.5 ℃, boiling point is 126 ℃, can be dissolved in methyl alcohol, chloroform, soluble in water.
Anti-form-1,2-cyclohexanediol cis-1,2-cyclohexanediol
1,2-cyclohexanediol is owing to having two hydroxyls and ring texture in molecule, thereby has comparatively active chemical property, can carry out the reactions such as addition, replacement, oxidation, dehydrogenation.1,2-cyclohexanediol is a kind of very important Organic Chemicals, mainly for the manufacture of fine chemical products such as polyester, medicine, agricultural chemicals.Along with developing rapidly of petrochemical complex, recent two decades comes, and the exploitation of cyclohexene derivative have caused domestic and international chemical worker's abundant attention.Adopting tetrahydrobenzene is the intermediate product 1 that raw material prepares pyrocatechol, and the study on the synthesis work of 2-cyclohexanediol gets more and more people's extensive concerning.
At present, synthesize 1 with tetrahydrobenzene as raw material, the research method of 2-cyclohexanediol has more, the general cyclohexene oxide legal system standby 1 that adopts, the 2-cyclohexanediol is mainly by being first epoxy cyclohexane with cyclohexene oxide, then epoxy cyclohexane is hydrolyzed under acidic medium and obtains 1,2-cyclohexanediol, and concrete reaction process is:
End is got up, adopt the method for the standby epoxy cyclohexane of cyclohexene oxide legal system to be mainly chlorohydrination, two chlorohydrination, phase transfer catalysis process, wherein, chlorohydrination, the not environmental protection of two chlorohydrination are eliminated gradually, it is catalyzer that phase transfer catalysis process adopts precious metal, hydrolysis epoxy cyclohexane used catalyst is mainly mineral acid, organic acid and organic salt substantially, such as: sulfuric acid, hydrochloric acid, formic acid, acetic acid, acidic ion exchange resin etc.
Yet due to present cyclohexene oxide severe reaction conditions, oxidized byproduct is many, and namely target product selectivity is lower.Have the investigator to propose, wish improves the selectivity of purpose product, must filter out the stronger catalyzer of selectivity, and the one, guarantee selective epoxidation, the 2nd, guarantee that over oxidation does not generate the classes such as acid.Therefore, the cyclohexene oxide system that the development goal selectivity of product is higher will become emphasis and the key point of research and development in the future.
As everyone knows, TS-1/H
2O
2Oxidation system has good oxidation effectiveness to alkene, and the selectivity of target product is higher, yet when being applied to cyclohexene oxide, its primary product is epoxy cyclohexane, and in order to prepare 1, during the 2-cyclohexanediol, need to continue to obtain by the hydrolysis epoxy cyclohexane, this makes whole preparation process comparatively complicated undoubtedly.
Therefore, can develop a kind of tetrahydrobenzene that can adopt and directly prepare 1,2-cyclohexanediol, and the higher method of target product selectivity will become the emphasis direction of research in the future.
Summary of the invention
The object of the present invention is to provide a kind of cyclohexene conversion rate, 1, the higher and eco-friendly cyclohexene oxide of 2-cyclohexanediol yield prepares the method for 1,2-cyclohexanediol.
The present inventor is devoted for years in TS-1/H
2O
2The research of cyclohexene oxide in system finds that in this oxidation system, what cyclohexene oxide mainly obtained is epoxy cyclohexane.And the present inventor finds in research process unexpectedly, adds a small amount of acidic substance, and cyclohexene oxide can directly obtain 1, the 2-cyclohexanediol, and selectivity is high, and productive rate is high.
The invention provides a kind of cyclohexene oxide and prepare 1, the method of 2-cyclohexanediol, the method comprises: under oxidation reaction condition, tetrahydrobenzene, aqueous hydrogen peroxide solution are contacted in organic solvent with titanium-silicon molecular sieve catalyst, wherein, described contact is carried out under acidic substance exist.
Method of the present invention can obtain 1,2-cyclohexanediol by the tetrahydrobenzene direct oxidation, and the cyclohexene conversion rate is high, target product 1, and the yield of 2-cyclohexanediol is higher, and method environmental friendliness of the present invention, is very suitable for industrial applications.
Embodiment
The invention provides a kind of cyclohexene oxide and prepare 1, the method of 2-cyclohexanediol, the method comprises: under oxidation reaction condition, tetrahydrobenzene, aqueous hydrogen peroxide solution are contacted in organic solvent with titanium-silicon molecular sieve catalyst, wherein, described contact is carried out under acidic substance exist.
According to the present invention, all can realize goal of the invention of the present invention according to preceding method, under preferable case, the weight ratio of described acidic substance and aqueous hydrogen peroxide solution is 0.0005-5: 1, be preferably 0.001-3: 1.
According to the present invention, all can realize goal of the invention of the present invention according to preceding method, the optional a wider range of the kind of acidic substance described in the present invention, be generally one or more in organic carboxyl acid, mineral acid, solid acid, acid-salt, wherein, described organic carboxyl acid can be various organic carboxyl acids commonly used, be preferably the organic carboxyl acid of C1-C10, one or more in the binary organic carboxyl acid of the unary organic carboxylic acid of C1-C10 and C-C10 more preferably, described solid acid can be various solid acids commonly used; Further preferred described acidic substance are one or more in sulfuric acid, phosphoric acid, acetic acid, formic acid, succinic acid, fluoroboric acid, sodium pyrosulfate (potassium), SODIUM PHOSPHATE, MONOBASIC (potassium), Whitfield's ointment, oxalic acid, hexanodioic acid, phthalic acid, p-methyl benzenesulfonic acid and strong acidic ion resin, the present invention to the kind of described strong acidic ion resin without particular requirement, the conventional strong acidic ion resin that uses all can be realized purpose of the present invention, for example can be 732 resin cation (R.C.)s.
In the present invention, containing acidic substance described contact refers to whole system under acidic substance exist in gets final product, and no matter its source, for example when containing acidic substance in described organic solvent (when perhaps organic solvent is acid), need not to add separately again acidic substance in system.
According to the present invention, the TS-1/H that commonly uses in the present invention
2O
2Solvent in the system of catalysis cyclohexene oxide all can be used as organic solvent of the present invention, wherein, is preferably one or more in alcohol, ether, ketone, acid, halohydrocarbon, ester and nitrogenous organic solvent; Preferred described nitrogenous organic solvent is nitrile.As previously mentioned, described acid can be monoprotic acid and/or the diprotic acid of C1-C10, is preferably monoprotic acid and/or the diprotic acid of C1-C6, more preferably one or more in formic acid, acetic acid, propionic acid, oxalic acid, o-benzoic acid and caproic acid.The solvent of all the other kinds also can be selected the conventional solvent that uses in this area, describes in detail no longer one by one at this.
The present inventor also finds in research process, when adopting one or more in alcohol, ketone and nitrile as organic solvent of the present invention, can further improve transformation efficiency and the target product 1 of tetrahydrobenzene of the present invention, the yield of 2-cyclohexanediol.Further, preferred described organic solvent comprises A component and B component, and described A component is ketone and/or nitrile, and described B component is alcohol; More preferably the weight ratio of described A component and B component is 0.1-50: 1, be preferably 1-20: and 1,2-15 more preferably: 1.
The present inventor studies discovery, and described organic solvent is pure and mild ketone, and described ketone is 4-9 with the mass ratio of alcohol: 1 o'clock, the yield of the transformation efficiency of tetrahydrobenzene and 1,2-cyclohexanediol can further improve; More preferably described ketone is 4-9 with the mass ratio of alcohol: 1 o'clock, the temperature of described contact was 40-150 ℃.
The present inventor finds equally, and described organic solvent is pure and mild nitrile, and described nitrile is 2-11 with the mass ratio of alcohol: 1 o'clock, the yield of the transformation efficiency of tetrahydrobenzene and 1,2-cyclohexanediol can further improve; More preferably described nitrile is 2-11 with the mass ratio of alcohol: 1 o'clock, the temperature of described contact was 50-150 ℃, was preferably 60-130 ℃.
In the present invention, adopt the mixed solvent of ketone and/or nitrile and alcohol can realize fully beneficial effect of the present invention, optional a wider range of the selection of the kind of described ketone, nitrile, alcohol, for the present invention, under preferable case, described nitrile is mononitriles and/or the dinitrile of C2-C10, the more preferably mononitriles of C2-C6 and/or dinitrile, further preferred, described nitrile is one or more in acetonitrile, succinonitrile, propionitrile, valeronitrile and adiponitrile, is particularly preferably one or more in acetonitrile, succinonitrile and adiponitrile.
Equally, under preferable case, described ketone is the ketone of C3-C10, more preferably the ketone of C3-C6, more preferably one or more in acetone, butanone, pimelinketone, hexanedione and diacetylmethane.
As previously mentioned, equally, under preferable case, described alcohol is the alcohol of C1-C10, be preferably the alcohol of C1-C6, more preferably one or more in methyl alcohol, ethanol, propylene glycol, butyleneglycol, hexalin, Pentyl alcohol, Virahol, the trimethyl carbinol and isopropylcarbinol, more preferably one or more in methyl alcohol, ethanol, propylene glycol, Virahol, the trimethyl carbinol, hexalin and isopropylcarbinol.
Titanium-silicon molecular sieve catalyst described in the present invention can provide with HTS, also can be the titanium-silicon molecular sieve catalyst of moulding, can select according to concrete reaction formation, and this is the known technology of those skilled in the art, does not repeat them here.
The present invention without particular requirement, can be the hydrogen peroxide of 20-80 % by weight for concentration to the concentration of described aqueous hydrogen peroxide solution (also can be described as hydrogen peroxide), for example can be the hydrogen peroxide of 30 commercially available % by weight, 50 % by weight, 70 % by weight.
The present invention to the condition of described oxidizing reaction without particular requirement, can for routine with the reaction conditions of HTS as the oxidation system of catalyzer.
Under preferable case, when the described catalyzer that contains HTS is HTS, the mass ratio that the condition of described oxidizing reaction generally comprises tetrahydrobenzene, aqueous hydrogen peroxide solution, HTS and organic solvent is 1: 0.02-3.6: 0.01-15: 2-30 is preferably 1: 0.2-2.2: 0.5-5: 3-15; The weight ratio of acidic substance and aqueous hydrogen peroxide solution is 0.0005-5: 1, be preferably 0.005-0.5: 1; The temperature of contact is 40-150 ℃, is preferably 50-120 ℃; Pressure is 0.01-2MPa, is preferably 0.1-0.5MPa; Time is 0.1-10h, is preferably 1-5h.The previous reaction condition generally is fit to the rhythmic reaction system, also can be used for successive reaction, as the reaction in slurry bed.
When the described catalyzer that contains HTS is when containing the preformed catalyst of HTS, the mass ratio that the condition of described oxidizing reaction generally comprises tetrahydrobenzene, aqueous hydrogen peroxide solution and organic solvent is 1: 0.02-3.6: 2-30 is preferably 1: 0.2-2.2: 3-15; The weight ratio of acidic substance and aqueous hydrogen peroxide solution is 0.0005-5: 1, be preferably 0.001-0.5: 1; The temperature of contact is 40-150 ℃, is preferably 50-120 ℃; Pressure is 0.01-2MPa, is preferably 0.1-0.5MPa; Liquid hourly space velocity is 0.01-10h
-1, be preferably 0.05-2h
-1The agent oil volume is preferably 0.05-5 than for 0.01-10.The previous reaction condition generally is fit to the successive reaction system, as successive reaction systems such as fixed beds.Liquid hourly space velocity described in the present invention is the definition of the conventional liquid hourly space velocity of using in this area, it is a kind of representation of air speed, its meaning is the per hour volume for the treatment of solution phase reaction thing of unit reaction volume (for the reaction of adopting solid catalyst, being per volume of catalyst).In the present invention, the agent oil volume than the definition for the conventional agent oil volume ratio that uses in this area, is the cumulative volume of catalyzer and the ratio of the cumulative volume of all liquid phase materials.
In the present invention, described pressure refers to the gauge pressure in reaction system.
According to the present invention, HTS in described titanium-silicon molecular sieve catalyst can be the HTS of routine, can for modification also can be for non-modification, be preferably at least a in the HTS (as Ti-β) of HTS (as TS-2), BETA structure of HTS (as TS-1), the MEL structure of MFI structure; More preferably having structural formula is xTiO
2SiO
2, wherein, x is 0.0001-0.04, is preferably 0.01-0.03, more preferably the HTS of 0.015-0.025.
In the present invention, described HTS can be commercially available, also can prepare, prepare the method for described HTS for conventionally known to one of skill in the art, for example, can be with reference to [Cyclohexane Oxidation Catalyzed by Titanium Silicalite (TS-1) With Hydrogen Peroxide Journal of Natural Gas Chemistry 2001,10 (4): 295-307] the method preparation described in also can make with reference to the method for disclosed Kaolinite Preparation of Catalyst in CN101279959A.
More preferably, the HTS in described titanium-silicon molecular sieve catalyst is the MFI structure, and HTS crystal grain is hollow structure, and the radical length of the cavity part of this hollow structure is the 5-300 nanometer, and described HTS is at 25 ℃, P/P
0=0.10, adsorption time is that the benzene adsorptive capacity that records under the condition of 1 hour is for being no less than 70 milligrams/gram, there is hysteresis loop between the adsorption isothermal line of the nitrogen absorption under low temperature of this HTS and desorption isotherm, HTS with said structure and character is commonly referred to as hollow HTS, the commercial HTS that is called, its correlation parameter and preparation method thereof can be referring to CN1301599A.
In the present invention, cyclohexanediol is cis-1,2-cyclohexanediol and anti-form-1, the general designation of 2-cyclohexanediol.
The present invention is further illustrated for following embodiment, but therefore do not limit the present invention.
In Comparative Examples and embodiment, reagent used is commercially available chemically pure reagent.In embodiment, the concentration of hydrogen peroxide is 27.5 quality %.
In embodiment, hollow HTS HTS used is that (Hunan is built long company and made for the Industrial products of the described HTS of CN1301599A, it is the HTS of MFI structure through the X-ray diffraction analysis, have hysteresis loop between the adsorption isothermal line of the nitrogen absorption under low temperature of this molecular sieve and desorption isotherm, crystal grain is that the radical length of hollow crystal grain and cavity part is the 15-180 nanometer; This sieve sample is at 25 ℃, P/P
0=0.10, the benzene adsorptive capacity that records under the adsorption time condition of 1 hour is 78 milligrams/gram), titanium oxide content is 2.5 % by weight.
In embodiment, traditional HTS (TS-1) used is by document [Cyclohexane Oxidation Catalyzed by Titanium Silicalite (TS-1) With Hydrogen Peroxide Journal of Natural Gas Chemistry 2001,10 (4): 295-307] the 296th page of (TS-1) sieve sample that the capable described method of 9-24 is prepared in, titanium oxide content is 2.5 % by weight.
Method preparation described in the J.Chem.Soc. such as the Ti-β reference literature Takashi Tatsumi that uses in embodiment, Chem.Commun.1997,677-678, titanium oxide content is 2.6 % by weight.
In the present invention, adopt gas-chromatography to carry out each analysis that forms in system, undertaken quantitatively all can carrying out with reference to prior art by proofreading and correct normalization method, calculate on this basis the evaluation indexes such as the yield of transformation efficiency, product of reactant and selectivity.
In the present invention, the transformation efficiency calculation formula of tetrahydrobenzene is as follows:
The calculation formula of compositional selecting is as follows:
The calculation formula of component yield is as follows:
Y
1,2-cyclohexanediol=S
1,2-cyclohexanediol* X
Tetrahydrobenzene
Wherein, X is transformation efficiency; S is selectivity; Y is yield; M is the quality of component; N is the amount of substance of component; M wherein
0And n
0Quality and molar weight before expression is reacted respectively.
Embodiment 1-21
The HTS that takes certain mass is loaded in three mouthfuls of vials of 250ml, then adds tetrahydrobenzene, hydrogen peroxide, organic solvent and acidic substance in container.Three mouthfuls of vials are put in constant temperature oil bath, and oil bath is placed on the temperature control magnetic stirring apparatus.Start magnetic agitation, begin reaction, the transformation efficiency of the kind of each material and materials, reaction conditions, tetrahydrobenzene, the selectivity of epoxy cyclohexane and yield see Table 1.
Comparative Examples 1
According to the method for embodiment 1-21, different is, does not contain acidic substance in reaction system, reaction conditions sees Table 1.
As can be seen from Table 1, adopt method of the present invention, can directly prepare 1,2-cyclohexanediol, and in oxidising process, transformation efficiency and the target product selectivity of tetrahydrobenzene is higher, further, in the preferred embodiment of the present invention, adopt the mixture of ketone and/or nitrile and alcohol as the reaction of solvent than a kind of solvent of independent employing, the transformation efficiency of tetrahydrobenzene is higher, target product 1, the selectivity of 2-cyclohexanediol and yield are also higher.
Table 1
Claims (10)
1. a cyclohexene oxide prepares 1, the method of 2-cyclohexanediol, the method comprises: under oxidation reaction condition, tetrahydrobenzene, aqueous hydrogen peroxide solution are contacted in organic solvent with titanium-silicon molecular sieve catalyst, it is characterized in that, described contact is carried out under acidic substance exist.
2. method according to claim 1, wherein, the weight ratio of acidic substance and aqueous hydrogen peroxide solution is 0.0005-5: 1, be preferably 0.001-3: 1.
3. method according to claim 1 and 2, wherein, described acidic substance are one or more in sulfuric acid, phosphoric acid, acetic acid, formic acid, succinic acid, phthalic acid, fluoroboric acid, sodium pyrosulfate, SODIUM PHOSPHATE, MONOBASIC, sal enixum, potassium primary phosphate, Whitfield's ointment, oxalic acid, p-methyl benzenesulfonic acid and strong acidic ion resin.
4. method according to claim 1 and 2, wherein, described organic solvent is selected from one or more in alcohol, ether, ketone, halohydrocarbon, acid, ester and nitrogenous organic solvent; Preferably, described nitrogenous organic solvent is nitrile.
5. method according to claim 4, wherein, described organic solvent is one or more in alcohol, ketone and nitrile, and preferred described organic solvent comprises A component and B component, and described A component is ketone and/or nitrile, and described B component be pure; More preferably the weight ratio of described A component and B component is 0.1-50: 1, be preferably 1-20: 1.
6. method according to claim 5, wherein, described organic solvent is pure and mild ketone, ketone is 4-9 with the mass ratio of alcohol: 1; The temperature of described contact is 40-150 ℃.
7. method according to claim 5, wherein, described organic solvent is pure and mild nitrile, nitrile is 2-11 with the mass ratio of alcohol: 1; The temperature of described contact is 50 ℃-150 ℃.
8. method according to claim 5, wherein, described ketone is the ketone of C3-C10, is preferably the ketone of C3-C6; Described nitrile is mononitriles and/or the dinitrile of C2-C10, is preferably mononitriles and/or the dinitrile of C2-C6; Described alcohol is the alcohol of C1-C10, is preferably the alcohol of C1-C6.
9. method according to claim 1 and 2, wherein, the described catalyzer that contains HTS is HTS, the condition of described oxidizing reaction comprises that the mass ratio of tetrahydrobenzene, aqueous hydrogen peroxide solution, HTS and organic solvent is 1: 0.02-3.6: 0.01-15: 2-30, the weight ratio of acidic substance and aqueous hydrogen peroxide solution is 0.0005-5: 1, and the temperature of contact is that 40-150 ℃, pressure are that 0.01-2MPa, time are 0.1-10h.
10. method according to claim 1 and 2, wherein, the HTS in described titanium-silicon molecular sieve catalyst is at least a in the HTS of HTS, BETA structure of HTS, the MEL structure of MFI structure; Be preferably that to have structural formula be xTiO
2SiO
2, x is 0.0001-0.04, preferred x is the HTS of 0.01-0.03; More preferably, HTS in described titanium-silicon molecular sieve catalyst is the HTS of MFI structure, and this HTS crystal grain is hollow structure, and the radical length of the cavity part of this hollow structure is the 5-300 nanometer, and described HTS is at 25 ℃, P/P
0=0.10, adsorption time be the benzene adsorptive capacity that records under the condition of 1 hour for being no less than 70 milligrams/gram, have hysteresis loop between the adsorption isothermal line of the nitrogen absorption under low temperature of this HTS and desorption isotherm.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105646144A (en) * | 2014-12-03 | 2016-06-08 | 苏州亚培克生物科技有限公司 | Preparation method of 1, 2-aliphatic diol |
| CN111939975A (en) * | 2020-08-24 | 2020-11-17 | 南开大学 | Bifunctional molecular sieve catalyst for directly preparing 1, 2-diol by catalyzing olefin and application thereof |
| CN114349608A (en) * | 2021-12-31 | 2022-04-15 | 岳阳昌德新材料有限公司 | Alcohol ether compound and process for producing the same |
| CN114394882A (en) * | 2022-01-21 | 2022-04-26 | 北京化工大学 | Method for preparing ethylene glycol by ethylene one-step method |
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| CN1301599A (en) * | 1999-12-24 | 2001-07-04 | 中国石油化工集团公司 | Titanium-silicon molecular sieve and its preparing method |
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2011
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1301599A (en) * | 1999-12-24 | 2001-07-04 | 中国石油化工集团公司 | Titanium-silicon molecular sieve and its preparing method |
Non-Patent Citations (2)
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| M. SASIDHARAN ET AL.: "Epoxidation of α , β-Unsaturated Carbonyl Compounds over Various Titanosilicates", 《 JOURNAL OF CATALYSIS》 * |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105646144A (en) * | 2014-12-03 | 2016-06-08 | 苏州亚培克生物科技有限公司 | Preparation method of 1, 2-aliphatic diol |
| CN105646144B (en) * | 2014-12-03 | 2018-04-20 | 苏州亚培克生物科技有限公司 | A kind of preparation method of 1,2 aliphatic glycols |
| CN111939975A (en) * | 2020-08-24 | 2020-11-17 | 南开大学 | Bifunctional molecular sieve catalyst for directly preparing 1, 2-diol by catalyzing olefin and application thereof |
| CN111939975B (en) * | 2020-08-24 | 2023-03-28 | 南开大学 | Bifunctional molecular sieve catalyst for directly preparing 1,2-diol by catalyzing olefin and application thereof |
| CN114349608A (en) * | 2021-12-31 | 2022-04-15 | 岳阳昌德新材料有限公司 | Alcohol ether compound and process for producing the same |
| CN114394882A (en) * | 2022-01-21 | 2022-04-26 | 北京化工大学 | Method for preparing ethylene glycol by ethylene one-step method |
| CN114394882B (en) * | 2022-01-21 | 2023-12-15 | 北京化工大学 | Method for preparing ethylene glycol by ethylene one-step method |
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Address after: 414000 room 217, No. 111, yingpanling Road, Yueyang Economic and Technological Development Zone, Yueyang City, Hunan Province Patentee after: Changde Xincai Technology Co.,Ltd. Address before: Room 209, 111 Yingpanling Road, Yueyang Economic and Technological Development Zone, Hunan 414000 Patentee before: Yueyang Changde Environmental Technology Co.,Ltd. |