CN102442976A - Method for epoxidizing olefinic hydrocarbon - Google Patents
Method for epoxidizing olefinic hydrocarbon Download PDFInfo
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- CN102442976A CN102442976A CN201010511515XA CN201010511515A CN102442976A CN 102442976 A CN102442976 A CN 102442976A CN 201010511515X A CN201010511515X A CN 201010511515XA CN 201010511515 A CN201010511515 A CN 201010511515A CN 102442976 A CN102442976 A CN 102442976A
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Abstract
The invention provides a method for epoxidizing olefinic hydrocarbon. The method comprises the following steps of: firstly, under the condition of an epoxidation reaction of the olefinic hydrocarbon and in the presence of a first solid catalyst, enabling a fixed mixed material containing a solvent, the olefinic hydrocarbon and hydrogen peroxide to carry out the epoxidation reaction in a moving-bed reactor, wherein the conversion rate of the hydrogen peroxide is enabled to reach over 50 percent by the reaction degree; and secondly, under the epoxidation reaction of the olefinic hydrocarbon, introducing the reaction mixture obtained in the first step and a second solid catalyst to a slurry-bed reactor and carrying out the epoxidation reaction, wherein the total conversion rate of the hydrogen peroxide is enabled to reach over 95 percent by the reaction degree. According to the method provided by the invention, due to the adoption of combination of the moving-bed reactor with the slurry-bed reactor, the defect that the conversion rate of the hydrogen peroxide is low when the moving-bed reactor is only used for reaction is overcome; meanwhile, the defect that the selectivity of epoxypropane is low when the slurry-bed reactor is only used for reaction is overcome.
Description
Technical field
The present invention relates to a kind of olefin epoxidation process.
Background technology
At present, mainly adopt chlorohydrination and conjugated oxidation to produce propylene oxide in the world.Chlorohydrination will progressively be eliminated because of there being pollution problem; And the restriction that conjugated oxidation is used by the by product outlet also can not be developed on a large scale.Therefore, the working method of the propylene oxide of prior art is all seriously restricting the production of propylene oxide.Occurred a kind of preparation method with new propylene oxide in recent years, this method utilizes oxidants hydrogen peroxide with epoxidation of propylene and synthesizing epoxypropane under the catalysis of HTS.This method has advantages such as mild condition, process environment be friendly and pollution-free, forms to producing the novel environment-friendly process of propylene oxide.
For example, CN1671678A adopts double-fixed bed reactor process to carry out epoxidation reaction, and first reactor drum is the isothermal fixed-bed reactor, and second reactor drum is insulation fix bed reactor.But the shortcoming that this method exists is that the conversion of the hydrogen peroxide that uses in the reaction is incomplete, and unreacted hydrogen peroxide completely can decompose in knockout tower and produces oxygen, brings potential safety hazard to device, when serious even can cause blast.
CN1449392A discloses a kind of method of using superoxide to make epoxy alkane; This method is in the reactor drum that a part of catalyzer respectively is housed of at least two arranged in series; In the presence of catalyzer and solvent, the method for epoxy alkane is made in the reaction through alkene and superoxide, according to this method; Only in first reactor drum, add superoxide; One or several reactor drum of back does not add fresh superoxide, and only is to use the superoxide that does not consume from the reactor drum of front, thereby the hydrogen peroxide in the reaction is transformed fully.The reactor drum that uses in this method is fixed-bed reactor or fluidized-bed reactor, and uses at least two reactor drums, preferably uses placed in-line 3 reactor drums.The shortcoming that this method exists is when using two minimum reactor drums; The conversion of hydrogen peroxide is still incomplete; When using plural tandem reactor, then cause increasing substantially of equipment cost; And the reaction time of a plurality of placed in-line reactor drums is long, and uncontrollable factor is too much in the reaction process.
Therefore, pressing for a kind of hydrogen peroxide that uses in the reaction that can make of exploitation transforms fully and the high olefin epoxidation process of selectivity of propylene oxide.
Summary of the invention
The conversion that the object of the invention is to overcome the hydrogen peroxide that uses in the reaction that exists in the prior art not exclusively and the low shortcoming of selectivity of propylene oxide provides a kind of hydrogen peroxide that uses in the reaction that can make to transform fully and the high olefin epoxidation process of selectivity of the propylene oxide that obtains.
In order to realize goal of the invention of the present invention, the invention provides a kind of olefin epoxidation process, wherein, this method may further comprise the steps:
(1) under the condition of epoxidation reaction of olefines; In the presence of first solid catalyst; Make first mixture that contains solvent, alkene and hydrogen peroxide in moving-burden bed reactor, carry out epoxidation reaction, the degree of reaction reaches more than 50% the transformation efficiency of hydrogen peroxide;
(2) under the condition of epoxidation reaction of olefines, the reaction mixture that step (1) is obtained and second solid catalyst are incorporated into and carry out epoxidation reaction in the slurry bed reactor, and the degree of reaction reaches more than 95% the transformation efficiency of total hydrogen peroxide.
Method provided by the invention is through using the combination of moving-burden bed reactor and slurry bed reactor; Overcome the low shortcoming of transformation efficiency of the hydrogen peroxide that exists when only using moving-burden bed reactor to react; Also overcome simultaneously the low shortcoming of selectivity of the propylene oxide that exists when only using slurry bed reactor to react; Need not to use too much placed in-line reactor drum simultaneously, reduced equipment cost and also shortened the production cycle.
Embodiment
The invention provides a kind of olefin epoxidation process, wherein, this method may further comprise the steps:
(1) under the condition of epoxidation reaction of olefines; In the presence of first solid catalyst; Make first mixture that contains solvent, alkene and hydrogen peroxide in moving-burden bed reactor, carry out epoxidation reaction, the degree of reaction reaches more than 50% the transformation efficiency of hydrogen peroxide;
(2) under the condition of epoxidation reaction of olefines, the reaction mixture that step (1) is obtained and second solid catalyst are incorporated into and carry out epoxidation reaction in the slurry bed reactor, and the degree of reaction reaches more than 95% the total conversion rate of hydrogen peroxide.
The present invention is through using the combination of moving-burden bed reactor and slurry bed reactor; The hydrogen peroxide that uses in the reaction is transformed fully; And the probability that side reaction takes place is very low; Can keep the selectivity of higher propylene oxide, need not to use too much placed in-line reactor drum simultaneously, reduce equipment cost and also shortened the production cycle.
According to the present invention, the optionally method of calculation of the transformation efficiency of the hydrogen peroxide in the step (1) and the total conversion rate of hydrogen peroxide, propylene oxide are following:
(I)
Mole number * 100% of the hydrogen peroxide of charging in the mole number/step (1) of the hydrogen peroxide that is transformed in the transformation efficiency=step (1) of the hydrogen peroxide in the step (1)
(II)
Total mole number * 100% of the hydrogen peroxide of the total mole number/charging of the hydrogen peroxide that the total conversion rate=quilt of hydrogen peroxide transforms
(III)
Total mole number sum * 100% of the epoxide of the mole number/generation of the propylene oxide of the selectivity=generation of propylene oxide.
Wherein, The detection method of the total mole number of the epoxide of the mole number of hydrogen peroxide, the mole number of propylene oxide and generation is conventionally known to one of skill in the art; For example; The mole number of hydrogen peroxide can adopt iodimetry,iodometry to detect, and the total mole number of the mole number of propylene oxide and the epoxide of generation can adopt the chromatogram marker method to detect.
According to the present invention, said moving-burden bed reactor is a kind of reactor drum in order to the continuous feeding and discharging of realizing gas-solid phase reaction process or liquid and solid phase reaction process.In the moving-burden bed reactor,, be difficult for when therefore using moving-burden bed reactor to react side reaction takes place, can guarantee the selectivity of propylene oxide, but that the problem that exists is the transformation efficiency of hydrogen peroxide is relatively low because the back-mixing of material is very little.
According to the present invention, in said first mixture, the content of solvent, alkene and hydrogen peroxide can in very large range change, and under the preferable case, the mol ratio of said solvent, alkene and hydrogen peroxide is 4-15: 0.5-5: 1.
Under the preferable case; Said first mixture also contains tensio-active agent; Gross weight with said first mixture is a benchmark, and the content of said tensio-active agent is 0.1-1 weight %, and said tensio-active agent can be oil soluble surfactant and/or water soluble surfactant active; For example, can be sorbester p17 and/or tween 80.
In reaction system, add tensio-active agent, formed emulsion at water, the solubleness of propylene in system increases; The effective rate of utilization of propylene increases, thereby the speed of response quickening, simultaneously; The propylene oxide that generates and the intermiscibility of emulsion increase, and have accelerated the velocity of diffusion of propylene oxide at catalyst surface, have shortened the residence time at catalyst surface; Slowed down the carrying out of side reaction, reaction preference improves, and catalyst life is elongated.
Among the present invention; To said solvent types is conventionally known to one of skill in the art; For example; Said solvent is that water, acetonitrile and carbonatoms are at least a in the alcohol of 1-6, and said carbonatoms is that the alcohol of 1-6 can be methyl alcohol, ethanol, propyl alcohol and isomer thereof, butanols and isomer thereof, amylalcohol and isomer thereof, particular methanol.
According to the present invention, the reaction of said moving-burden bed reactor can in very large range change, under the preferable case; The reaction conditions of the moving-burden bed reactor of telling can comprise: temperature can be 30-90 ℃, is preferably 40-80 ℃, and pressure can be 0.5-4.5MPa; Be preferably 0.6-3MPa, the reaction times can be 0.2-10 hour, is preferably 1-5 hour; PH can be 5-8, is preferably 5.5-7.
Slurry bed reactor used among the present invention is claimed paste state bed reactor again, is meant that the small solid particulate of catalyzer is suspended in the reactor drum in the liquid medium.The material back-mixing of paste state bed reactor is big, after reaction finishes, general catalyzer with just can carry out following batch reaction after material separates.In the said slurry-bed reaction, because catalyzer and reaction mass mix, therefore, the transformation efficiency of hydrogen peroxide is higher, but owing to the cause of back-mixing, is easy to take place side reaction, thereby causes the selectivity of propylene oxide lower.
According to the present invention, the reaction conditions of said slurry bed reactor can in very large range change, under the preferable case; The reaction conditions of said slurry bed reactor can comprise: temperature is 30-90 ℃; Be preferably 40-80 ℃, pressure is 0.5-4.5MPa, is preferably 0.6-3MPa; Time is 0.2-10 hour, is preferably 0.4-4h
-1, with respect to the reaction mixture that the step (1) of 100 weight parts obtains, the consumption of said second solid catalyst is the 3-10 weight part, is preferably the 4-9 weight part.
Among the present invention; In the moving-burden bed reactor in used first solid catalyst and the slurry bed reactor kind of the second used solid catalyst have no particular limits; They can be identical or different, and under the preferable case, said first solid catalyst and second solid catalyst can be titanium-silicon molecular sieve catalyst; When in moving-burden bed reactor, using, said titanium-silicon molecular sieve catalyst can be powder.
In a preferred implementation of the present invention; Method of the present invention also comprises: before in getting into slurry-phase reactor, carrying out epoxidation reaction; The reaction mixture that obtains in the step (1) is separated, obtain containing alkene and propylene oxide and do not contain first logistics of hydrogen peroxide and contain second logistics of unreacted hydrogen peroxide, solvent and water; And introducing alkene obtains second mixture in second logistics, second mixture is incorporated in the slurry bed reactor reacts afterwards.The ring texture of the reaction mixture that obtains in the step (1) being separated the propylene oxide that can avoid obtaining in the moving-burden bed reactor ruptures in slurry bed reactor; Thereby reduced production of by-products, can further improve the selectivity of propylene oxide.The amount of the alkene of said introducing can in very large range change, and under the preferable case, with respect to the unreacted hydrogen peroxide of 100 weight parts, the amount of the alkene of in second logistics, introducing is the 100-200 weight part.
In another preferred embodiment of the present invention; Method of the present invention can also comprise: the reaction mixture that step (1) is obtained be incorporated into carry out epoxidation reaction in the slurry bed reactor before; In the reaction mixture that said step (1) obtains, mend alkene; The amount that said benefit is gone into alkene can in very large range change, and under the preferable case, the amount that said benefit is gone into alkene makes in said reaction mixture; With respect to the unreacted hydrogen peroxide of 100 weight parts, the content of alkene is the 100-200 weight part.
Among the present invention; The kind of said alkene is conventionally known to one of skill in the art; For example; Said alkene is that carbonatoms is the alkene of 2-8, comprises in ethene, propylene and isomer thereof, butylene and isomer thereof, amylene and isomer thereof, hexene and isomer thereof, heptene and isomer thereof and octene and the isomer thereof one or more, preferred propylene.
Through concrete embodiment the present invention is described in more details below.
Embodiment 1
(1) the HTS fine catalyst is loaded in the moving-burden bed reactor (available from new capital, Chengdu Yong Tong machine works), the concentration of catalyzer in material is 5 weight %.First mixture that will contain propylene, methyl alcohol and hydrogen peroxide is incorporated in the moving-burden bed reactor, and wherein, in said first mixture, the mol ratio of methyl alcohol, propylene and hydrogen peroxide is 10: 4: 1.The condition of said reaction comprises: temperature is 35 ℃; Pressure is 1MPa; Time is 8 hours, regulates the pH=5 of the first mixture material with ammoniacal liquor, through the amount of hydrogen peroxide in the mixture after the iodimetry,iodometry method detection reaction; And calculating the transformation efficiency of hydrogen peroxide according to the calculation formula shown in the preceding text (I), the result is as shown in table 1.Detect the amount of the propylene oxide that generates in the step (1) through the chromatogram marker method, and pass through the amount that the chromatogram marker method detects the total epoxide that generates in the step (1).
(2) (long ltd is built in the Hunan for the reaction mixture that the step (1) of 100 weight parts is obtained and the HTS powder of 5 weight parts; HTS) be incorporated in the slurry bed reactor (available from Tianjin exhibition difficult to understand Science and Technology Ltd.) and carry out epoxidation reaction; The temperature of reaction is 85 ℃; Pressure is 4MPa, and the time is 1 hour, through the amount of hydrogen peroxide in the mixture after the iodimetry,iodometry detection reaction; And pass through the amount that the chromatogram marker method detects the middle propylene oxide that generates of step (2), and pass through the amount of total epoxide of generation in the chromatogram marker method detection step (1).And respectively and (III), calculating the total conversion rate of hydrogen peroxide and the selectivity of propylene oxide according to the calculation formula shown in the preceding text (II), the result is as shown in table 1.
Comparative Examples 1
According to preparing propylene oxide with embodiment 1 identical method, the reactor drum that difference is to use in the step (2) for step (1) in identical moving-burden bed reactor.The condition of said reaction comprises: temperature is 35 ℃, and pressure is 1MPa, and the liquid volume air speed is 0.5h
-1Regulate the pH=5 of the first mixture material with ammoniacal liquor; Through the amount of hydrogen peroxide in the mixture after the iodimetry,iodometry detection reaction, and pass through the amount that the chromatogram marker method detects the middle propylene oxide that generates of step (2), and pass through the amount of total epoxide of generation in the chromatogram marker method detection step (1).And respectively and (III), calculating the total conversion rate of hydrogen peroxide and the selectivity of propylene oxide according to the calculation formula shown in the preceding text (II), the result is as shown in table 1.
Comparative Examples 2
According to preparing propylene oxide with embodiment 1 identical method; The reactor drum that difference is to use in the step (1) for step (2) in identical slurry bed reactor, the temperature of reaction is 85 ℃, pressure is 4MPa; Time is 1 hour; Through the amount of hydrogen peroxide in the mixture after the iodimetry,iodometry detection reaction, and pass through the amount that the chromatogram marker method detects the middle propylene oxide that generates of step (2), and pass through the amount of total epoxide of generation in the chromatogram marker method detection step (1).And respectively and (III), calculating the total conversion rate of hydrogen peroxide and the selectivity of propylene oxide according to the calculation formula shown in the preceding text (II), the result is as shown in table 1.
Embodiment 2
(1) the HTS fine catalyst is loaded in the moving-burden bed reactor (available from new capital, Chengdu Yong Tong machine works), the concentration of catalyzer in material is 5 weight %.First mixture that will contain propylene, methyl alcohol, hydrogen peroxide is incorporated in the moving-burden bed reactor, and wherein, in said first mixture, the mol ratio of methyl alcohol, propylene and hydrogen peroxide is 4: 2: 1.The condition of said reaction comprises: temperature of reaction is 75 ℃; Reaction pressure position 4MPa; Time is 2 hours, regulates the pH=7 of the first mixture material with ammoniacal liquor, through the amount of hydrogen peroxide in the mixture after the iodimetry,iodometry detection reaction; And calculating the transformation efficiency of hydrogen peroxide according to the calculation formula shown in the preceding text (I), the result is as shown in table 1.And pass through the amount that the chromatogram marker method detects the middle propylene oxide that generates of step (1), and pass through the amount of total epoxide of generation in the chromatogram marker method detection step (1).
(2) (long ltd is built in the Hunan for the reaction mixture that the step (1) of 100 weight parts is obtained and the HTS powder of 8 weight parts; HTS) be incorporated in the slurry bed reactor (available from Tianjin exhibition difficult to understand Science and Technology Ltd.) and carry out epoxidation reaction; The temperature of reaction is 40 ℃; The pressure of reaction is 1.5MPa, and the time of reaction is 8 hours, through the amount of hydrogen peroxide in the mixture after the iodimetry,iodometry detection reaction; And pass through the amount that the chromatogram marker method detects the middle propylene oxide that generates of step (2), and pass through the amount of total epoxide of generation in the chromatogram marker method detection step (1).And respectively and (III), calculating the total conversion rate of hydrogen peroxide and the selectivity of propylene oxide according to the calculation formula shown in the preceding text (II), the result is as shown in table 1.
Embodiment 3
(1) the HTS fine catalyst is loaded in the moving-burden bed reactor (available from new capital, Chengdu Yong Tong machine works), the concentration of catalyzer in material is 5 weight %.First mixture that will contain propylene, methyl alcohol, hydrogen peroxide is incorporated in the moving-burden bed reactor, and wherein, in said first mixture, the mol ratio of methyl alcohol, propylene and hydrogen peroxide is 6: 0.5: 1.The condition of said reaction comprises: temperature of reaction is 50 ℃; Reaction pressure is 3MPa; Time is 5 hours, regulates the pH=6 of the first mixture material with ammoniacal liquor, through the amount of hydrogen peroxide in the mixture after the iodimetry,iodometry detection reaction; And calculating the transformation efficiency of third hydrogen peroxide according to the calculation formula shown in the preceding text (I), the result is as shown in table 1.And pass through the amount that the chromatogram marker method detects the middle propylene oxide that generates of step (1), and pass through the amount of total epoxide of generation in the chromatogram marker method detection step (1).
(2) reaction mixture that step (1) is obtained is incorporated into knockout tower to be separated; Second logistics that obtains containing first logistics of alkene and propylene oxide and contain unreacted hydrogen peroxide, solvent and water detects the content of unreacted hydrogen peroxide in second logistics through the iodimetry,iodometry method.
(3) with second logistics of 100 weight parts (in second logistics; With respect to the unreacted hydrogen peroxide of 100 weight parts; The propylene that adds 150 weight parts), (long ltd is built in the Hunan to the HTS powder of 5 weight parts, HTS) is incorporated in the slurry bed reactor (available from Tianjin exhibition difficult to understand Science and Technology Ltd.) to carry out epoxidation reaction, regulates the pH=7 of material with ammoniacal liquor; The temperature of reaction is 45 ℃; The pressure of reaction is 2MPa, and the time of reaction is 3 hours, through the amount of hydrogen peroxide in the mixture after the iodimetry,iodometry method detection reaction; And pass through the amount that the chromatogram marker method detects the middle propylene oxide that generates of step (2), and pass through the amount of total epoxide of generation in the chromatogram marker method detection step (1).And respectively and (III), calculating the total conversion rate of hydrogen peroxide and the selectivity of propylene oxide according to the calculation formula shown in the preceding text (II), the result is as shown in table 1.
Embodiment 4
(1) the HTS fine catalyst is loaded in the moving-burden bed reactor (available from new capital, Chengdu Yong Tong machine works), the concentration of catalyzer in material is 5 weight %.First mixture that will contain propylene, methyl alcohol, hydrogen peroxide is incorporated in the moving-burden bed reactor, and wherein, in said first mixture, the mol ratio of methyl alcohol, propylene and hydrogen peroxide is 5: 1: 1.The condition of said reaction comprises: temperature of reaction is 40 ℃; Reaction pressure is 2.5MPa; Time is 5.5 hours, regulates the pH=6 of the first mixture material with ammoniacal liquor, through the amount of hydrogen peroxide in the mixture after the iodimetry,iodometry method detection reaction; And calculating the transformation efficiency of hydrogen peroxide according to the calculation formula shown in the preceding text (I), the result is as shown in table 1.And pass through the amount that the chromatogram marker method detects the middle propylene oxide that generates of step (1), and pass through the amount of total epoxide of generation in the chromatogram marker method detection step (1).
(2) reaction mixture that the step (1) of 100 weight parts is obtained is (in the reaction mixture; With respect to the unreacted hydrogen peroxide of 100 weight parts; The propylene that adds 100 weight parts) and the HTS powder of 6 weight parts (long ltd is built in the Hunan; HTS) be incorporated in the slurry bed reactor (available from Tianjin exhibition difficult to understand Science and Technology Ltd.) and carry out epoxidation reaction, the temperature of reaction is 55 ℃, and the pressure of reaction is 2.3MPa; The time of reaction is 5.5 hours; Through the amount of hydrogen peroxide in the mixture after the iodimetry,iodometry method detection reaction, and pass through the amount that the chromatogram marker method detects the middle propylene oxide that generates of step (2), and pass through the amount of total epoxide of generation in the chromatogram marker method detection step (1).And, calculating transformation efficiency, the selectivity of propylene oxide and the yield of propylene oxide of hydrogen peroxide respectively according to the calculation formula shown in the preceding text (II)-(IV), the result is as shown in table 1.
Table 1
Can find out from the data of last table 1; Method provided by the invention is through using the combination of moving-burden bed reactor and slurry bed reactor; Can make the hydrogen peroxide that uses in the reaction have higher total conversion rate, and it is very low that the probability of side reaction takes place, can keep the selectivity of higher propylene oxide.
Through embodiment 1 is contrasted and can find out with Comparative Examples 1 and Comparative Examples 2; Use the combination of moving-burden bed reactor and slurry bed reactor; Can overcome the low shortcoming of transformation efficiency of the hydrogen peroxide that exists when only using moving-burden bed reactor to react; Also can overcome simultaneously the low shortcoming of selectivity of the propylene oxide that exists when only using slurry bed reactor to react, and need not to use too much placed in-line reactor drum, reduce equipment cost.
Claims (9)
1. olefin epoxidation process, wherein, this method may further comprise the steps:
(1) under the condition of epoxidation reaction of olefines; In the presence of first solid catalyst; Make first mixture that contains solvent, alkene and hydrogen peroxide in moving-burden bed reactor, carry out epoxidation reaction, the degree of reaction reaches more than 50% the transformation efficiency of hydrogen peroxide;
(2) under the condition of epoxidation reaction of olefines, the reaction mixture that step (1) is obtained and second solid catalyst are incorporated into and carry out epoxidation reaction in the slurry bed reactor, and the degree of reaction reaches more than 95% the total conversion rate of hydrogen peroxide.
2. method according to claim 1, wherein, the mol ratio of said solvent, alkene and hydrogen peroxide is 4-15: 0.5-5: 1.
3. method according to claim 1 and 2, wherein, said solvent is that water, acetonitrile and carbonatoms are at least a in the alcohol of 1-6, said alkene is that carbonatoms is the alkene of 2-8.
4. method according to claim 1 and 2, wherein, the reaction conditions in the said moving-burden bed reactor comprises: temperature is 30-90 ℃, and pressure is 0.5-4.5MPa, and the time is 0.2-10 hour, and pH is 5-8.
5. method according to claim 1 and 2; Wherein, The reaction conditions of said slurry bed reactor comprises: temperature is 30-90 ℃, and pressure is 0.5-4.5MPa, and the time is 0.2-10 hour; With respect to the reaction mixture that the step (1) of 100 weight parts obtains, the consumption of said second solid catalyst is the 3-10 weight part.
6. method according to claim 1, wherein, said first solid catalyst and second solid catalyst HTS of respectively doing for oneself.
7. method according to claim 1; Wherein, This method also comprises: before in getting into slurry-phase reactor, carrying out epoxidation reaction; The reaction mixture that obtains in the step (1) is separated, obtain containing alkene and propylene oxide and do not contain first logistics of hydrogen peroxide and contain second logistics of unreacted hydrogen peroxide, solvent and water; And introducing alkene obtains second mixture in second logistics, second mixture is incorporated in the slurry bed reactor reacts afterwards.
8. method according to claim 7, wherein, with respect to the unreacted hydrogen peroxide of 100 weight parts, the amount of the alkene of in second logistics, introducing is the 100-200 weight part.
9. method according to claim 1; Wherein, This method also comprises: the reaction mixture that step (1) is obtained be incorporated into carry out epoxidation reaction in the slurry bed reactor before, in the reaction mixture that said step (1) obtains, mend alkene, the amount that said benefit is gone into alkene makes in said reaction mixture; With respect to the unreacted hydrogen peroxide of 100 weight parts, the content of alkene is the 100-200 weight part.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010511515.XA CN102442976B (en) | 2010-10-11 | 2010-10-11 | Method for epoxidizing olefinic hydrocarbon |
| US13/878,659 US8859791B2 (en) | 2010-10-11 | 2011-10-11 | Process for producing an alkylene oxide by olefin epoxidation |
| PCT/CN2011/001703 WO2012048529A1 (en) | 2010-10-11 | 2011-10-11 | Method for producing oxidized olefin through olefin epoxidation |
| KR1020137012119A KR101872391B1 (en) | 2010-10-11 | 2011-10-11 | Method for producing oxidized olefin through olefin epoxidation |
| EP11831926.8A EP2628735B1 (en) | 2010-10-11 | 2011-10-11 | Method for producing oxidized olefin through olefin epoxidation |
| RU2013120981/04A RU2567749C2 (en) | 2010-10-11 | 2011-10-11 | Method of producing alkylene oxide by olefin epoxidation |
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| CN201010511515.XA CN102442976B (en) | 2010-10-11 | 2010-10-11 | Method for epoxidizing olefinic hydrocarbon |
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| CN104311512A (en) * | 2014-10-13 | 2015-01-28 | 东南大学 | Clean method for preparing 1,2-epoxybutane |
| CN104311512B (en) * | 2014-10-13 | 2016-06-29 | 东南大学 | A kind of clean method for preparing of 1,2-epoxy butane |
| CN106632148A (en) * | 2016-12-27 | 2017-05-10 | 中触媒新材料股份有限公司 | Device and method for preparing propylene oxide |
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