Technological method for transferring hydrogenation for sec-butyl acetate by secondary butyl alcohol and simultaneously producing methyl ethyl ketone

A technology for transfer hydrogenation of sec-butyl acetate, applied in chemical instruments and methods, dehydrogenation preparation, preparation of organic compounds, etc., can solve the problem that high-purity sec-butanol cannot be obtained, cannot be realized, and sec-butyl acetate cannot be realized 100% conversion and other issues to achieve long-term stable operation, reduce severity, and maintain thermal balance

Active Publication Date: 2016-11-16
九江齐鑫化工有限公司 +2
View PDF9 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] But no matter adopting transesterification or hydrogenation method to produce sec-butanol, the 100% conversion of sec-butyl acetate cannot be realized due to the limitation of reaction balance or selectivity, and sec-butyl acetate and sec-butanol form an azeotropic system, a total of The boiling point of the boiling system (98.72°C) is very close to the boiling point of sec-butanol (99.5°C), which makes it impossible to obtain high-purity sec-butanol. Therefore, the process scheme in the above patent is used to market high-purity sec-butanol and methyl ethyl ketone. above is impossible

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Technological method for transferring hydrogenation for sec-butyl acetate by secondary butyl alcohol and simultaneously producing methyl ethyl ketone
  • Technological method for transferring hydrogenation for sec-butyl acetate by secondary butyl alcohol and simultaneously producing methyl ethyl ketone

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Using the mixture of sec-butanol and sec-butyl acetate as raw material, wherein the molar ratio of sec-butanol and sec-butyl acetate is 1:1, fill 10g Cu-ZnO catalyst in the fixed bed reactor, the catalyst is prepared by co-precipitation method, copper The zinc atomic ratio is 1:1, the reaction temperature is 250°C, the reaction pressure is controlled at 0.0MPa (gauge pressure), and the reaction space velocity is 0.25h -1 Under certain conditions, the transfer hydrogenation of sec-butyl alcohol to sec-butyl acetate is realized, the sec-butanol is dehydrogenated to form methyl ethyl ketone, and the transfer hydrogenation of sec-butyl acetate generates sec-butanol and ethanol, and the generated sec-butanol is further dehydrogenated to form methyl ethyl ketone ; Collect the gas phase and liquid phase product of fixed bed reactor outlet respectively and carry out chromatographic analysis, and calculate the conversion ratio and the selectivity of sec-butyl acetate, sec-butanol...

Embodiment 2

[0023] Using the mixture of sec-butanol and sec-butyl acetate as raw material, wherein the molar ratio of sec-butanol and sec-butyl acetate is 1:0.8, 10g Cu-ZnO catalyst is loaded in the fixed bed reactor, and the catalyst is prepared by co-precipitation method, copper The atomic ratio of zinc is 0.5:1, the reaction temperature is 220°C, the controlled reaction pressure is 0.4MPa (gauge pressure), and the reaction space velocity is 0.5h -1 Under certain conditions, the transfer hydrogenation of sec-butyl alcohol to sec-butyl acetate is realized, the sec-butanol is dehydrogenated to form methyl ethyl ketone, and the transfer hydrogenation of sec-butyl acetate generates sec-butanol and ethanol, and the generated sec-butanol is further dehydrogenated to form methyl ethyl ketone ; Collect the gas phase and liquid phase product of fixed bed reactor outlet respectively and carry out chromatographic analysis, and calculate the conversion ratio and the selectivity of sec-butyl acetate,...

Embodiment 3

[0025] Using the mixture of sec-butanol and sec-butyl acetate as the raw material, the molar ratio of sec-butanol to sec-butyl acetate is 1:0.4, and 10g Cu / SiO is filled in the fixed bed reactor 2 Catalyst, the catalyst is prepared by impregnation method, the mass percentage of copper in the catalyst is 10%, the reaction temperature is 240°C, the controlled reaction pressure is 0.8MPa (gauge pressure), and the reaction space velocity is 1.0h -1 Under certain conditions, the transfer hydrogenation of sec-butyl alcohol to sec-butyl acetate is realized, the sec-butanol is dehydrogenated to form methyl ethyl ketone, and the transfer hydrogenation of sec-butyl acetate generates sec-butanol and ethanol, and the generated sec-butanol is further dehydrogenated to form methyl ethyl ketone ; Collect the gas phase and liquid phase product of fixed bed reactor outlet respectively and carry out chromatographic analysis, and calculate the conversion ratio and the selectivity of sec-butyl ace...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a technological method for transferring hydrogenation for sec-butyl acetate by sec-butyl alcohol and simultaneously producing methyl ethyl ketone. According to the method, the composition of sec-butyl alcohol and sec-butyl acetate is taken as a raw material, the transferring hydrogenation for sec-butyl acetate by sec-butyl alcohol is realized under the effect of a hydrogenation catalyst, and the sec-butyl alcohol is dehydrogenized, so that the methyl ethyl ketone is obtained, the sec-butyl acetate is subjected to transferring hydrogenation, so as to produce the sec-butyl alcohol and ethyl alcohol; the produced sec-butyl alcohol is dehydrogenized, so that the methyl ethyl ketone is obtained. A product is subjected to gas-liquid separation, high-purity hydrogen is obtained, and a liquid product is subjected to distillation separation firstly, so that the composition of ethyl alcohol and methyl ethyl ketone is obtained, and the sec-butyl alcohol or the composition of the sec-butyl alcohol and the sec-butyl acetate in a column reactor returns a transferring hydrogenation reactor, so as to be reacted continuously; the composition of ethyl alcohol and the methyl ethyl ketone is subjected to extractive distillation firstly, so that a high-purity methyl ethyl ketone product is obtained, an extraction agent containing ethyl alcohol in the column reactor is rectified again, a high-purity ethyl alcohol product is obtained, and the extraction agent in the column reactor returns an extractive distillation column to be recycled. The method solves the problems that the sec-butyl acetate and the sec-butyl alcohol are azeotropic and high-purity sec-butyl alcohol and methyl ethyl ketone cannot be obtained.

Description

technical field [0001] The invention belongs to the technical field, and in particular relates to a process for producing methyl ethyl ketone by transferring and hydrogenating sec-butyl acetate with sec-butanol. Background technique [0002] Methyl ethyl ketone is an important chemical raw material. Due to its excellent solubility, it can be miscible with various hydrocarbon solvents, and has no effect on the content and viscosity of the dissolved solute, so it is widely used in coatings, adhesives and ink industries; The method can produce methyl ethyl ketone peroxide, methyl allyl ketone, methyl amyl ketone oxime, diacetyl, etc., which can be used in the production of spices, coating antioxidants and corrosion inhibitors. [0003] At present, the traditional production process of methyl ethyl ketone adopts the hydration of butene to produce sec-butanol, and sec-butanol is produced by dehydrogenation under the action of copper-based catalyst. [0004] With the advancement...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C07C45/00C07C49/10C07C29/149C07C31/12C07C31/08
CPCC07C29/149C07C45/002C07C49/10C07C31/12C07C31/08
Inventor 姚志龙曹开喜胡彬张芳朱永凯周明刘森孙培永张胜红
Owner 九江齐鑫化工有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap