CN101993345A - Method for improving selectivity of glycol prepared by adding hydrogen into oxalate - Google Patents
Method for improving selectivity of glycol prepared by adding hydrogen into oxalate Download PDFInfo
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- CN101993345A CN101993345A CN2009100578487A CN200910057848A CN101993345A CN 101993345 A CN101993345 A CN 101993345A CN 2009100578487 A CN2009100578487 A CN 2009100578487A CN 200910057848 A CN200910057848 A CN 200910057848A CN 101993345 A CN101993345 A CN 101993345A
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- oxalate
- ethylene glycol
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- preparing ethylene
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Abstract
The invention relates to a method for improving the selectivity of glycol prepared by adding hydrogen into oxalate, which mainly solves the technical problem of low selectivity of glycol serving as a reaction product in the prior art. In the method, by adopting the technical scheme that oxalate and hydrogen serving as raw materials contact a catalyst, namely a copper-containing solid oxide pre-deposited with carbon at the reaction temperature of between 180 and 280 DEG C, under the reaction pressure of between 1.0 and 10 MPa and under the conditions that the weight space velocity is between 0.05 and 5 hours<-1> and a molar ratio of the hydrogen to the oxalate is 40-200:1 to produce glycol-containing effluence, the problem is better solved, wherein the pre-deposited carbon is in an amount which is 0.001 to 10 percent based on the weight of the catalyst. The method can be used for the industrial production for increasing the production of the glycol.
Description
Technical field
The present invention relates to optionally method of a kind of raising hydrogenation of oxalate for preparing ethylene glycol, particularly about improving optionally method of dimethyl oxalate hydrogenation or oxalic acid diethyl ester hydrogenation preparing ethylene glycol.
Background technology
Ethylene glycol (EG) is a kind of important Organic Chemicals, be mainly used in and produce trevira, frostproofer, unsaturated polyester resin, lubricant, softening agent, nonionogenic tenside and explosive etc., can be used for industries such as coating, soup, brake fluid and printing ink in addition, solvent and medium as ammonium pertorate, be used to produce special solvent glycol ether etc., purposes is very extensive.
At present, direct hydration method or the legal operational path of pressurized water are all adopted in domestic and international large-scale ethylene glycol production, this technology is that oxyethane and water are made into mixed aqueous solution by 1: 20～22 (mol ratios), in fixed-bed reactor in 130～180 ℃, 1.0～2.5MPa reacted 18～30 minutes down, oxyethane all is converted into alcohol mixture, the aqueous glycol solution content that generates is greatly about 10% (massfraction), carry through the multiple-effect evaporator dehydration then and obtain ethylene glycol dense the separation with rectification under vacuum, but production equipment need be provided with a plurality of vaporizers, consume lot of energy and be used for dehydration, cause the technological process of production long, equipment is many, the energy consumption height, directly influence the production cost of ethylene glycol.Since the seventies in 20th century, both at home and abroad some major companies that mainly produce ethylene glycol all are devoted to the Synthesis of Ethylene Glycol by Catalytic Hydration Study on Technology, mainly contain shell company, U.S. UCC company and Dow company, the Mitsubishi chemical company of Ying He, domestic Shanghai Petroleum Chemical Engineering Institute, Nanjing University of Technology etc.What representative was wherein arranged is the heterogeneous catalysis hydration method of Shell company and the homogeneous catalysis hydration method of UCC company.Shell company has reported that from 1994 quaternary ammonium type acid carbonate anionite-exchange resin carries out the exploitation of EO catalytic hydration technology as catalyzer, obtain EO transformation efficiency 96%～98%, the test-results of EG selectivity 97%～98%, develop the poly organic silicon alkane ammonium salt loaded catalyst of similar silicon dioxide skeleton and the epoxide hydrating process under the catalysis thereof in 1997 again, obtained better conversion rate and selectivity.The UCC company of the U.S. has mainly developed two kinds of hydration catalysts: a kind of is the anionic catalyst that is carried on the ion exchange resin, mainly is molybdate, tungstate, vanadate and triphenylphosphine complex catalyst; Another kind is the molybdate composite catalyst.In two kinds of Application of Catalyst examples, the TM catalyzer of spent ion exchange resin DOWEXWSA21 preparation is hydration under 9: 1 the condition in the mol ratio of water and EO, and the EG yield is 96%.Using the molybdate composite catalyst, is hydration under 5: 1 the condition in the mol ratio of water and EO, and the EG yield is 96.6%.Catalysis method greatly reduces the water ratio, simultaneously can obtain high EO transformation efficiency and high EG selectivity, but also there is certain problem aspect Preparation of Catalyst, regeneration and life-span, not enough as catalyst stability, preparation is quite complicated, be difficult to recycle, have also can be in product residual a certain amount of anionic metal, need to increase corresponding apparatus and separate.NSC 11801 method synthesizing glycol is by oxyethane and carbonic acid gas synthesizing ethylene carbonate, obtains ethylene glycol with the NSC 11801 hydrolysis again.The US4508927 patent proposes esterification and hydrolysis reaction are separately carried out.The two-step process that the US4500559 of U.S. Halcon-SD company proposes is that the mixture that comes from reactor is through resorber, again with the carbonic acid gas extracting oxyethane under the criticality, obtain oxyethane, carbonic acid gas, water mixture contacts synthetic BC with catalyst for esterification reaction such as Organohalogen compounds, sulfohalides, BC is admitted to hydrolysis reactor then, and hydrolysis obtains ethylene glycol and carbonic acid gas under same catalyst action, and the ethylene glycol yield is up to 99%.Japanese Patent JP571006631 has proposed the EO-EC-EG novel process of industrially scalable, patent introduces oxyethane and the carbonic acid gas esterification is in the presence of catalyzer KI, 160 ℃ are carried out esterification, transformation efficiency is 99.9%, the selectivity of ethylene glycol is 100%, the NSC 11801 legal system is equipped with the ethylene glycol technology no matter aspect transformation efficiency and selectivity, still all than present BO direct hydration method bigger advantage is being arranged aspect production process raw material consumption and the energy expenditure, technical in ethylene glycol is a kind of method that maintains the leading position.But this method still is raw material with the oil, and need build the ethylene glycol production equipment again, and this glycol unit to new construction is more suitable, and on original production unit was undergone technological transformation, it was favourable to be not so good as catalytic hydration.
Document CN101138725A discloses a kind of Catalysts and its preparation method of oxalic ester hydrogenation synthesizing of ethylene glycol, and it is active ingredient with the metallic copper, and zinc is auxiliary agent, adopt the coprecipitation method preparation, but this catalyst glycol selectivity is lower.
Document " petrochemical complex " was rolled up the 340th～343 page of the 4th phase in 2007 the 36th and has been introduced a kind of employing Cu/SiO
2Carry out the research of hydrogenation of dimethyl oxalate to synthesizing ethylene glycol reaction, but there is the problem of poor selectivity equally in this catalyzer.
At present, from world wide, petroleum resources day is becoming tight, and oil price fluctuation in the world's is bigger, and the resource general layout of China can be summarized as few oil, weak breath, many coals.Development carbon one chemical industry not only can make full use of Sweet natural gas and coal resource, reduces the dependence of petroleum import and can alleviate environmental stress, is unusual important field of research.With the carbon monoxide is the feedstock production barkite, is a very attractive Coal Chemical Industry route then with preparing glycol by hydrogenating oxalate.Now both at home and abroad to being that the research of feedstock production barkite has obtained good effect with the carbon monoxide, industrial production is ripe.And, still have more need of work further investigation with preparing glycol by hydrogenating oxalate, especially obtaining higher selectivity is an important topic.
Summary of the invention
Technical problem to be solved by this invention is the low technical problem of reaction product glycol selectivity that exists in the conventional art, and optionally method of a kind of new raising hydrogenation of oxalate for preparing ethylene glycol is provided.This method has the glycol selectivity advantages of higher.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is as follows: a kind of raising hydrogenation of oxalate for preparing ethylene glycol is method optionally, with barkite and hydrogen is raw material, the cupric soild oxide that adopts pre-carbon distribution is a catalyzer, wherein the amount of pre-carbon distribution counts 0.001～10% with catalyst weight, in temperature of reaction is 180～280 ℃, and reaction pressure is 1.0～10MPa, and weight space velocity is 0.05～5 hour
-1, the hydrogen ester mol ratio is that raw material contacts with catalyzer under 40～200: 1 the condition, generates the effluent that contains ethylene glycol.
The reaction conditions preferable range is in the technique scheme: 190～260 ℃ of temperature of reaction, weight space velocity are 0.05～3 hour
-1, hydrogen/ester mol ratio is 50～150: 1, reaction pressure is 2.0～8.0MPa; Reaction conditions more preferably scope is: 200～250 ℃ of temperature of reaction, weight space velocity are 0.05～2 hour
-1, hydrogen/ester mol ratio is 50～120: 1, reaction pressure is 2.5～5.0MPa.
Cupric soild oxide catalyzer comprises active ingredient, auxiliary agent and carrier in the technique scheme, and carrier is selected from least a in silicon oxide or the aluminum oxide, and the carrier preferred version is selected from silicon oxide; Active ingredient is selected from oxide compound or its mixture of metallic copper, copper, and the active ingredient preferred version is selected from the mixture of metallic copper or Red copper oxide; Auxiliary agent is selected from least a in alkali earth metal, transition metal or the thulium, the auxiliary agent preferred version is selected from alkali earth metal Mg, Ca and Ba, the metallic element K of IA family, Na, the V of transition metal, Ti, Mn, Fe, Co, Ni and Zn, perhaps at least a among rare-earth metals La, Eu, Gd and the Tb.With the total catalyst weight is benchmark, the content of auxiliary element is greater than 0～20%, preferable range is 0.01～15%, more preferably scope is 0.05～10%, the content range of active ingredient element is 10～70%, the content preferable range of active ingredient element is 15～60%, and more preferably scope is 20～55%.
Technique scheme medium-height grass acid esters is selected from dimethyl oxalate or oxalic acid diethyl ester, and the amount of the pre-carbon distribution of catalyzer counts 0.02～5% with catalyst weight.
As everyone knows, in the hydrogenation of oxalate for preparing ethylene glycol reaction process, except the transformation efficiency that improves barkite as far as possible, how to avoid side reaction to greatest extent, especially prevent the generation of barkite scission reaction, and then the selectivity that improves ethylene glycol is one of key of technological development, and this is the important symbol that embodies the hydrogenation of oxalate for preparing ethylene glycol technological competitiveness.And find in present inventor's experimental study process, the catalyzer that test prepares, after carrying out pre-carbon distribution reaction under certain condition, carry out oxalate hydrogenation again, the purpose product selectivity can obtain bigger raising, this is because the acid stronger active sites of the preferential covering of pre-carbon distribution reaction, be equivalent to the catalytic surface active sites is modified and modification, suppressed the generation of cracking side-reaction, especially the barkite of having drawn up is cracked into the generation of methane etc. and side reactions such as CO, reach and significantly improve optionally purpose of ethylene glycol product, play effect preferably.Can adopt the monohydroxy-alcohol of C2～C5, particular methanol or ethanol raw material original position to carry out the carbon distribution reaction about carbon distribution, what of carbon deposition quantity can be controlled by temperature or carbon distribution time.
Adopting technical scheme of the present invention, is raw material with barkite and hydrogen, and the cupric soild oxide that adopts pre-carbon distribution is a catalyzer, and wherein the amount of pre-carbon distribution counts 0.05～5% with catalyst weight, and 200～250 ℃ of temperature of reaction, weight space velocity is 0.05～2 hour
-1, hydrogen/ester mol ratio is 50～120: 1, and reaction pressure is under the condition of 2.5～5.0MPa, and raw material contacts with catalyzer, generates the effluent that contains ethylene glycol.Its result is: the transformation efficiency of barkite is greater than 98%, and the selectivity of ethylene glycol has obtained better technical effect greater than 95%.
The invention will be further elaborated below by embodiment, but be not limited only to present embodiment.
Embodiment
[embodiment 1～9]
Taking by weighing specific surface is silica support 200 grams of 300 meters squared per gram, according to 35% reactive metal copper and 10% promoter metal zinc content configuration catalyzer, its step is as follows: choose cupric nitrate and zinc nitrate, be made into steeping fluid according to Cu and Zn charge capacity, silica support flooded 24 hours in this solution after, vacuum-drying at room temperature 12 hours solids.Again with solid 120 ℃ dry 12 hours down, after 450 ℃ of roastings 4 hours, gas (hydrogen molar content 20%, nitrogen molar content 80%) 200 ml/min that feed the hydrogen mixture obtain required catalyzer 450 ℃ of activation 6 hours.With this cooling catalyst to 350 ℃, feed methanol feedstock afterwards, 350 ℃ of temperature, weight space velocity 3 hours
-1, handled 12 hours under the pressure 0.5MPa condition, the amount in the pre-carbon distribution of catalyst weight is 0.15% after tested.
Cupric soild oxide catalyst sample 20 restrains after taking by weighing above-mentioned carbon distribution, and in the fixed-bed reactor of packing into, the employing dimethyl oxalate is a raw material, and concrete reaction conditions and reaction result are as shown in table 1 below:
Table 1
[embodiment 10～18]
Each Step By Condition according to embodiment 1 makes 35%Cu+1%Cu
2O+5%Zn/SiO
2Catalyzer.According to embodiment 1 identical method catalyzer is carried out pre-carbon distribution, just control the carbon distribution asynchronism(-nization) and obtain the different catalyst sample of carbon deposition quantity.
Take by weighing each 20 gram of above-mentioned different carbon deposition quantity cupric soild oxide catalyst sample respectively, be respectively charged in the fixed-bed reactor, the employing dimethyl oxalate is a raw material, is 0.6 hour at weight space velocity
-1, pressure is 3.0MPa, and hydrogen/ester ratio is 100: 1, and temperature is that the reaction result of different carbon deposition quantities is as shown in table 2 below under 230 ℃ of conditions:
Table 2
| Sequence number | Carbon deposition quantity of catalyst, % | The dimethyl oxalate transformation efficiency, % | Glycol selectivity, % |
| 10 | 0.01 | 100 | 93.62 |
| 11 | 0.08 | 100 | 94.56 |
| 12 | 0.15 | 100 | 95.11 |
| 13 | 0.3 | 100 | 96.27 |
| 14 | 0.5 | 100 | 97.55 |
| 15 | 0.8 | 100 | 96.64 |
| 16 | 1 | 100 | 95.76 |
| 17 | 3 | 99.8 | 94.83 |
| 18 | 5 | 99.6 | 93.26 |
[embodiment 19]
According to each step and the operational condition of embodiment 1, just change: cupric soild oxide catalyzer is 48%Cu+8%Zn+0.2%K/SiO
2, be 0.5% in the catalyst weight carbon content, the employing oxalic acid diethyl ester is a raw material, is 0.4 hour at weight space velocity
-1, pressure is 3.5MPa, and hydrogen/ester ratio is 80: 1, and temperature is under 240 ℃ of conditions, and the transformation efficiency of oxalic acid diethyl ester is 100%, the selectivity of ethylene glycol is 95.3%.
[embodiment 20]
According to each step and the operational condition of embodiment 1, just change: cupric soild oxide catalyzer is 30%Cu+3%Mn+1%Li/ZSM-5, is 0.6% in the catalyst weight carbon content, and the employing oxalic acid diethyl ester is a raw material, is 1.0 hours at weight space velocity
-1, pressure is 3.5MPa, and hydrogen/ester ratio is 100: 1, and temperature is under 220 ℃ of conditions, and the transformation efficiency of oxalic acid diethyl ester is 100%, the selectivity of ethylene glycol is 94.8%.
[embodiment 21]
According to each step and the operational condition of embodiment 1, just change: cupric soild oxide catalyzer is 60%Cu+0.5%Ni+1%Ba/Al
2O
3, be 8% in the catalyst weight carbon content, the employing oxalic acid diethyl ester is a raw material, is 0.08 hour at weight space velocity
-1, pressure is 2.5MPa, and hydrogen/ester ratio is 110: 1, and temperature is under 220 ℃ of conditions, and the transformation efficiency of oxalic acid diethyl ester is 100%, the selectivity of ethylene glycol is 93.9%.
[embodiment 22]
According to each step and the operational condition of embodiment 1, just change: cupric soild oxide catalyzer is 60%Cu+0.5%Bi+1%La/SiO
2, be 1% in the catalyst weight carbon content, the employing dimethyl oxalate is a raw material, is 0.15 hour at weight space velocity
-1, pressure is 3.8MPa, and hydrogen/ester ratio is 60: 1, and temperature is under 200 ℃ of conditions, and the transformation efficiency of dimethyl oxalate is 99.6%, the selectivity of ethylene glycol is 94.8%.
[embodiment 23]
According to each step and the operational condition of embodiment 1, just change: cupric soild oxide catalyzer is 30%Cu+0.02%Sr+0.08%W/SiO
2, be 0.6% in the catalyst weight carbon content, the employing dimethyl oxalate is a raw material, is 0.3 hour at weight space velocity
-1, pressure is 2.6MPa, and hydrogen/ester ratio is 80: 1, and temperature is under 220 ℃ of conditions, and the transformation efficiency of dimethyl oxalate is 100%, the selectivity of ethylene glycol is 96.8%.
[embodiment 24]
According to each step and the operational condition of embodiment 1, just change: cupric soild oxide catalyzer is 38%Cu+0.1%V+0.05%La+0.2%Zr/SiO
2, be 0.3% in the catalyst weight carbon content, the employing dimethyl oxalate is a raw material, is 0.85 hour at weight space velocity
-1, pressure is 3.0MPa, and hydrogen/ester ratio is 50: 1, and temperature is under 210 ℃ of conditions, and the transformation efficiency of dimethyl oxalate is 99.6%, the selectivity of ethylene glycol is 93.7%.
[comparative example 1]
According to each step and the operational condition of embodiment 23, be not carbon distribution of catalyzer, the employing dimethyl oxalate is a raw material, is 0.15 hour at weight space velocity
-1, pressure is 3.8MPa, and hydrogen/ester ratio is 60: 1, and temperature is under 200 ℃ of conditions, and the transformation efficiency of dimethyl oxalate is 96.6%, the selectivity of ethylene glycol is 89.2%.
[comparative example 2]
According to each step and the operational condition of embodiment 24, be not carbon distribution of catalyzer, the employing dimethyl oxalate is a raw material, is 0.85 hour at weight space velocity
-1, pressure is 3.0MPa, and hydrogen/ester ratio is 50: 1, and temperature is under 210 ℃ of conditions, and the transformation efficiency of dimethyl oxalate is 95.6%, the selectivity of ethylene glycol is 84.7%.
Claims (8)
1. one kind is improved optionally method of hydrogenation of oxalate for preparing ethylene glycol, with barkite and hydrogen is raw material, the cupric soild oxide that adopts pre-carbon distribution is a catalyzer, wherein the amount of pre-carbon distribution counts 0.001～10% with catalyst weight, in temperature of reaction is 180～280 ℃, reaction pressure is 1.0～10MPa, and weight space velocity is 0.05～5 hour
-1, hydrogen/ester mol ratio is that raw material contacts with catalyzer under 40～200: 1 the condition, generates the effluent that contains ethylene glycol.
2. according to the described raising hydrogenation of oxalate for preparing ethylene glycol of claim 1 method optionally, it is characterized in that 190～260 ℃ of temperature of reaction, weight space velocity is 0.05～3 hour
-1, hydrogen/ester mol ratio is 50～150: 1, reaction pressure is 2.0～8.0MPa.
3. according to the described raising hydrogenation of oxalate for preparing ethylene glycol of claim 2 method optionally, it is characterized in that 200～250 ℃ of temperature of reaction, weight space velocity is 0.05～2 hour
-1, hydrogen/ester mol ratio is 50～120: 1, reaction pressure is 2.5～5.0MPa.
4. according to the described raising hydrogenation of oxalate for preparing ethylene glycol of claim 1 method optionally, it is characterized in that cupric soild oxide catalyzer comprises active ingredient, auxiliary agent and carrier, carrier is selected from least a in silicon oxide or the aluminum oxide; Active ingredient is selected from oxide compound or its mixture of metallic copper, copper; Auxiliary agent is selected from least a in alkali earth metal, transition metal or the thulium, is benchmark with the total catalyst weight, and the content of auxiliary element is greater than 0～20%, and the content of active ingredient element is 10～70%.
5. according to the described raising hydrogenation of oxalate for preparing ethylene glycol of claim 4 method optionally, it is characterized in that cupric soild oxide support of the catalyst is selected from silicon oxide; Active ingredient is selected from the mixture of metallic copper or Red copper oxide; Auxiliary agent is selected from alkali earth metal Mg, Ca and Ba, the metallic element K of IA family, Na, the V of transition metal, Ti, Mn, Fe, Co, Ni and Zn, perhaps at least a among rare-earth metals La, Eu, Gd and the Tb.
6. according to the described raising hydrogenation of oxalate for preparing ethylene glycol of claim 5 method optionally, it is characterized in that cupric soild oxide catalyzer is benchmark with the total catalyst weight, the content of auxiliary element is 0.01～15%, and the content of active ingredient element is 15～60%.
7. according to the described raising hydrogenation of oxalate for preparing ethylene glycol of claim 1 method optionally, it is characterized in that barkite is selected from dimethyl oxalate or oxalic acid diethyl ester.
8. according to the described raising hydrogenation of oxalate for preparing ethylene glycol of claim 1 method optionally, it is characterized in that the amount of pre-carbon distribution counts 0.02～5% with catalyst weight.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102219640A (en) * | 2010-04-15 | 2011-10-19 | 中国石油化工股份有限公司 | Method for improving selectivity for making glycol by adding hydrogen in oxalate |
| CN102764656A (en) * | 2012-08-06 | 2012-11-07 | 久泰能源科技有限公司 | High-efficiency hydrogenation catalyst and method for preparing same |
| CN104045516A (en) * | 2013-03-13 | 2014-09-17 | 中国石油化工股份有限公司 | Method for improving glycol product quality |
| CN106732798A (en) * | 2016-12-16 | 2017-05-31 | 东至绿洲环保化工有限公司 | A kind of hydrorefining petroleum waxes support type resin catalyst |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4677234A (en) * | 1985-02-04 | 1987-06-30 | Union Carbide Corporation | Process for the preparation of ethylene glycol |
| CN101138725A (en) * | 2007-10-10 | 2008-03-12 | 天津大学 | Catalyzer for the oxalic ester hydrogenation synthesizing of ethylene glycol and method of preparing the same |
| CN101342489A (en) * | 2007-07-12 | 2009-01-14 | 上海焦化有限公司 | Hydrogenation reaction catalyst, preparation and application thereof |
-
2009
- 2009-08-31 CN CN2009100578487A patent/CN101993345A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4677234A (en) * | 1985-02-04 | 1987-06-30 | Union Carbide Corporation | Process for the preparation of ethylene glycol |
| CN101342489A (en) * | 2007-07-12 | 2009-01-14 | 上海焦化有限公司 | Hydrogenation reaction catalyst, preparation and application thereof |
| CN101138725A (en) * | 2007-10-10 | 2008-03-12 | 天津大学 | Catalyzer for the oxalic ester hydrogenation synthesizing of ethylene glycol and method of preparing the same |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102219640A (en) * | 2010-04-15 | 2011-10-19 | 中国石油化工股份有限公司 | Method for improving selectivity for making glycol by adding hydrogen in oxalate |
| CN102764656A (en) * | 2012-08-06 | 2012-11-07 | 久泰能源科技有限公司 | High-efficiency hydrogenation catalyst and method for preparing same |
| CN104045516A (en) * | 2013-03-13 | 2014-09-17 | 中国石油化工股份有限公司 | Method for improving glycol product quality |
| CN104045516B (en) * | 2013-03-13 | 2016-08-24 | 中国石油化工股份有限公司 | The method improving quality of ethylene glycol product |
| CN106732798A (en) * | 2016-12-16 | 2017-05-31 | 东至绿洲环保化工有限公司 | A kind of hydrorefining petroleum waxes support type resin catalyst |
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Application publication date: 20110330 |