Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Technology producing C3-C5 alkyl alcohol and co-producing alcohol by adding hydrogen in acetic acid C3-C5 alkyl ester

A C3-C5, alkyl ester technology, applied in the field of hydrogenation of C3-C5 alkyl acetate to produce C3-C5 alkyl alcohol and ethanol production, can solve the problem of high hydrogenation reaction pressure, harsh equipment requirements, sec-butyl problems such as low alcohol selectivity, to achieve the effect of high heat utilization rate, simple and practical process, and low equipment requirements

Active Publication Date: 2015-03-11
HUNAN RUIYUAN PETROCHEM
View PDF7 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hydrogenation reaction pressure of this method is high, and the equipment requirement is harsh, and the conversion rate of sec-butyl acetate and the selectivity of sec-butanol are difficult to balance; the selectivity of sec-butanol is low, and the hydrogenation reaction is accompanied by the isomerization of sec-butanol The oxidation reaction leads to the production of a large amount of butanol, so it is not suitable for the industrial preparation of sec-butanol from sec-butyl acetate

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
  • Technology producing C3-C5 alkyl alcohol and co-producing alcohol by adding hydrogen in acetic acid C3-C5 alkyl ester
  • Technology producing C3-C5 alkyl alcohol and co-producing alcohol by adding hydrogen in acetic acid C3-C5 alkyl ester
  • Technology producing C3-C5 alkyl alcohol and co-producing alcohol by adding hydrogen in acetic acid C3-C5 alkyl ester

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] (1) Preparation of hydrogenation catalyst: prepared according to copper-chromium (Cu-Cr) atomic ratio of 2.35. Take copper nitrate (Cu(NO 3 ) 2 ·3H 2 O) 70g and chromium nitrate (Cr(NO 3 ) 3 9H 2 O) 50g were dissolved in water respectively at 50°C to form a mixed aqueous solution. Weigh 12g carrier γ-Al 2 o 3 Add it to the solution, and maintain it in an incubator at 25°C for 20h. Ordinary filtration was used to remove excess solution, and the filtrate was dried in an oven at 120°C for 12 hours, and then calcined in a muffle furnace for 5 hours at 500°C to obtain an alumina-supported copper-chromium catalyst.

[0050] (2) Hydrogenation catalyst loading and reduction: 5 parts by weight of the copper-chromium catalyst and 1 part by weight of alumina particles were mixed uniformly and loaded into the reactor. The hydrogenation reactor is a small stainless steel fixed bed reactor. The inner diameter of the reaction chamber is 14mm, filled with 30g of the catalyst ...

Embodiment 2

[0053] The catalyst preparation steps are the same as in Example 1, except that the active component copper-chromium (Cu-Cr) atomic ratio is 10. Under optimized process conditions, the conversion rate of sec-butyl acetate is 97.62%, and the selectivity of sec-butanol is 98.33%.

Embodiment 3

[0055] The catalyst preparation steps are the same as in Example 1, except that the active component copper-silver (Cu-Ag) atomic ratio is 18, and the carrier is mesoporous molecular sieve. Under optimized process conditions, the conversion rate of sec-butyl acetate is 93.61%, and the selectivity of sec-butanol is 97.21%.

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 technology producing C3-C5 alkyl alcohol and co-producing alcohol by adding hydrogen in acetic acid C3-C5 alkyl ester. The technology comprises the following steps: (1) mixing acetic acid C3-C5 alkyl ester and hydrogen after gasification of the acetic acid C3-C5 alkyl ester; pumping the gas in a hydrogenation reactor; conducting reaction under the action of a catalyst; (2) introducing the hydrogenated product into a buffer tank after heat exchange of the hydrogenated product; returning non-condensable gas phase to a raw material hydrogen inlet for recycling; passing liquid phase to a crude alcohol separating tower for preliminary separation; (3) obtaining a tower top product at tower top of the crude alcohol separating tower; introducing the tower top product to an ethanol dehydration tower to obtain anhydrous ethanol with high purity; (4) introducing a tower kettle material in the crude alcohol separating tower to a C3-C5 alkyl alcohol refining tower; conducting separation through azeotropic distillation. The technology is simple, less in required equipment, environmental-friendly, and free of emission of main by-product; the system has very high adaptability; the adopted catalyst is high in selectivity, conversion rate and activity, and long in service life; the heat energy of the whole technology is utilized in a stepped manner, and is high in efficiency, and low in energy consumption.

Description

technical field [0001] The invention relates to a process for producing C3-C5 alkyl alcohol by hydrogenation of C3-C5 alkyl acetate and co-production of ethanol, in particular to the production of C3-C5 alkyl alcohol by hydrogenation of C3-C5 alkyl acetate by non-grain method Process for the co-production of ethanol. Background technique [0002] According to the classification data of acetate products released by the National Bureau of Statistics, acetates mainly include methyl acetate, ethyl acetate, n-butyl acetate, isobutyl acetate, 2-ethoxyethyl acetate, vinyl acetate And other aliphatic hydrocarbon esters, in addition there are other unstated acetates such as propyl acetate, amyl acetate, etc. [0003] As the international oil price drops step by step, the domestic chemical product market continues to slump, and the development of new chemical derivatives has become the key direction of various manufacturers and scientific research structures. Among them, acetates ar...

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): C07C29/149C07C31/08C07C31/10C07C31/12C07C31/125
CPCC07C29/149C07C31/08C07C31/10C07C31/12C07C31/125
Inventor 甘健李园园刘成
Owner HUNAN RUIYUAN PETROCHEM
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com