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Co-producing method and device for cyclohexanol and ethanol

A technology of cyclohexanol and ethanol, which is applied in chemical instruments and methods, purification/separation of hydrocarbons, preparation of organic compounds, etc., can solve the problem of lack of cyclohexanol and ethanol

Active Publication Date: 2014-06-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0024] It can be seen from the published literature that there is no information disclosure about the co-production of cyclohexanol and ethanol through the hydrogenation of cyclohexyl acetate in the prior art, and there is no selective hydrogenation of benzene, cyclohexene addition esterification, cyclohexyl acetate Disclosure of information on the hydrogenation of esters to produce cyclohexanol and ethanol

Method used

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  • Co-producing method and device for cyclohexanol and ethanol
  • Co-producing method and device for cyclohexanol and ethanol
  • Co-producing method and device for cyclohexanol and ethanol

Examples

Experimental program
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Effect test

Embodiment 1

[0098] This example is used to illustrate the method for the selective hydrogenation of benzene to cyclohexene.

[0099] Benzene and hydrogen are injected into the hydrogenation reactor filled with ruthenium particle catalyst at a molar ratio of 1:3, and the benzene hydrogenation reaction is carried out under the conditions of a reaction temperature of 135°C, a pressure of 4.5MPa, and a residence time of 15min. After the reaction product is separated from the hydrogen , Collect the liquid product and run continuously for 1000h. After the test, the collected liquid product was analyzed by gas chromatography, and its composition was: 53.3m% of benzene, 35.4m% of cyclohexene, and 11.3m% of cyclohexane. Using N, N-dimethylacetamide as an extractant, extract and separate the above liquid product to obtain a mixture of cyclohexane and cyclohexene.

Embodiment 2

[0101] 100mL of macroporous strongly acidic hydrogen-type ion exchange resin (synthesized in the laboratory according to the classic literature method, suspension copolymerization of styrene solution containing 15% divinylbenzene to make white balls, and then sulfonated with concentrated sulfuric acid, measured Its exchange capacity is 5.2mmolH + / g dry basis) into the middle of a stainless steel tube reactor with a jacket of φ32×4×1000mm, and a certain amount of quartz sand is filled at both ends. The raw materials of acetic acid and cyclohexene (obtained by the method in Example 1, composed of: cyclohexene 75m%, cyclohexane 25m%) are pumped into the reactor by a metering pump at a certain flow rate to react, and the reaction tube is Hot water is introduced into the jacket to control the reaction temperature, and the reactor pressure is controlled through the reactor outlet back pressure valve. The outlet product of the reactor was sampled by an online sampling valve for onl...

Embodiment 3

[0104] The test device, method and raw materials are the same as in Example 2, except that the catalyst is a phosphorus-modified Hβ molecular sieve catalyst (the Hβ molecular sieve with a silicon-aluminum ratio of 50 is modified with 85% phosphoric acid, and then kneaded with alumina to form , obtained by drying at 120°C and roasting at 500°C, with a phosphorus content of 2%). The reaction conditions and results are shown in Table 2. It can be seen from Table 2 that the conversion rate of cyclohexene is 90%, the selectivity of ester product is greater than 99%, and the catalyst activity and selectivity are stable after running for 480 hours.

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Abstract

The invention provides a co-producing method and a device for cyclohexanol and ethanol. Benzene is employed as a starting material and the cyclohexanol and the ethanol are co-produced by a selective hydrogenation reaction of benzene, an additive esterification reaction of cyclohexene and a hydrogenation reaction of cyclohexyl acetate. The invention also provides a device for achieving the method. The co-producing method is characterized in that: (1) both of the esterification reaction and the ester hydrogenation reaction are greatly high in selectivity with an atom utilization rate being greatly high; (2) the producing process is environment friendly; (3) the cyclohexanol and the ethanol are co-produced; (4) the additive esterification reaction is carried out in a manner of reactive distillation, so that not only is the reaction efficiency significantly increased but also the extractive rectification separating process is simplified.

Description

technical field [0001] The invention relates to a method and device for co-producing cyclohexanol and ethanol. Background technique [0002] Both cyclohexanol and ethanol are important chemical raw materials and solvents. Cyclohexanol is mainly used to produce nylon 6, nylon 66 and other products; ethanol is not only a raw material for synthetic esters and other chemical products, but also widely used as a fuel additive for gasoline. [0003] The method of industrially synthesizing ethanol is mainly the direct hydration method of ethylene, but in some countries rich in agricultural and sideline products, the fermentation method is still the main method of ethanol production. Due to the large population and insufficient arable land in our country, and the problem of "competing with the mouth for food" in the production of ethanol by fermentation, the fermentation method does not conform to the national conditions of our country. In addition, the pollution of the fermentatio...

Claims

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Application Information

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IPC IPC(8): C07C35/08C07C31/08C07C29/149C07C69/14C07C67/04C07C67/54
CPCC07C5/10C07C5/11C07C7/005C07C29/149C07C67/04C07C67/54C07C2601/14C07C2601/16C07C35/08C07C31/08C07C69/14C07C13/20C07C13/18Y02P20/10
Inventor 宗保宁马东强温朗友孙斌杨克勇
Owner CHINA PETROLEUM & CHEM CORP
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