Unlock instant, AI-driven research and patent intelligence for your innovation.

Method of producing ethyl acetate and equipment for carrying out this method

A technology of ethyl acetate and acetic acid, applied in the field of equipment for producing ethyl acetate and implementing the same, can solve problems such as corrosive environment, unfavorableness, poor separation efficiency and the like

Inactive Publication Date: 2005-06-08
SULZER CHEMTECH AG
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Of course, the rate of uncatalyzed esterification is too low to be applied industrially
Active distillation using a homogeneous catalyst feed brings the aforementioned corrosion problems and environmental disadvantages
Distillation columns filled with free particles of acidic catalysts are not suitable for industrial production due to high hydrodynamic resistance and poor separation efficiency

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
  • Method of producing ethyl acetate and equipment for carrying out this method
  • Method of producing ethyl acetate and equipment for carrying out this method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] figure 1 Shows a schematic diagram of the device of the present invention. Catalytic distillation tower operated continuously under normal pressure 1 It is divided into 3 zones. tower 1 Reaction zone 2 . In the reaction zone 2 Below is the bottom separation area 3 , In the reaction zone 2 Above is the upper separation zone 4 . Boiler 8 With tower bottom 7 Connected. Condenser 12 With tower top 10 Connected. Splitter 14 With condenser 12 Connected.

[0020] Reaction zone 2 It is filled with a catalytically active filler containing 33 g of acetic acid ion exchanger. Pouring filler is filled in the bottom separation zone 3 And upper separation zone 4 Medium (4mm diameter arc saddle packing). Separation zone 3 and 4 The length is 0.5m.

[0021] The production method is that the ethanol feed passes through the pipeline 6 Enter the bottom separation zone 3 , Acetic acid feed through the pipeline 5 Enter the upper separation zone 4 . The flow rates of the above two raw materia...

Embodiment 2

[0023] Except that acetic anhydride was used as the raw material instead of acetic acid, the synthesis of ethyl acetate was carried out under the same conditions as in Example 1. The acetic anhydride reacted with ethanol in an equimolar ratio in a pre-reactor to generate acetic acid and ethyl acetate. Then add the reaction mixture to the tower 1 Instead of acetic acid. The selected total molar ratio of ethanol to acetic anhydride is 1.52. Using a reflux ratio of 1:6, the device outputs 0.46 mol / hour crude ethyl acetate, and its purity is 91.4% by weight. Except for ethyl acetate, the product contains only 5.2% by weight of water and 3.4% by weight of ethanol. Splitter 14 The output of the separated aqueous phase is 3.9ml / hour.

Embodiment 3

[0025] Use includes a boiler with a volume of 50 liters 8 , Equipped with condenser 12 And separator 14 The tower 1 The device implements the esterification of ethanol caused by acetic acid. Catalytic distillation tower 1 Including the reaction zone 2 , Reaction zone 2 With catalytically active filler KATAPAK  S, the packing has 1.07kgH + Form of acidic ion exchanger. Bottom separation zone 3 And upper separation zone 4 The middle packing is equipped with directional packing (bottom separation zone) with an efficiency of 12, that is, 20 theoretical plates. Pass acetic acid through the pipeline at 0.73kg / hour 5 Transported into the reaction zone 2 , Pass ethanol through the pipeline at 0.41kg / hour 6 Transport into the bottom separation zone 3 The upper boundary. Remove the water produced by the reaction from the separator 14 Through pipeline 15 Discharge, pass the organic phase through the pipe 16 Reflux into the tower 1 , A part of the organic phase (0.86kg / hour) is passed throug...

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

PropertyMeasurementUnit
diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to a method of producing ethyl acetate by reaction of ethyl alcohol with acetic acid and / or acetic anhydride in the presence of a solid acidic catalyst accompanied by simultaneous distillation separation of reaction components, in which acetic acid or acetic anhydride or a mixture thereof and ethyl alcohol, respectively, are introduced separately in a molar ratio of 2:1 to 1:2.5 and in a defined quantity, per unit volume of catalyst, into a system separated into three zones, whereby, in the reaction zone, the reaction runs simultaneously with distillation separation of components, acetic acid feed is introduced into the reaction zone or above the zone and ethyl alcohol feed is introduced into the reaction zone or below this zone; in the upper separation zone, the volatile mixture is separated; thereafter, it is cooled to 5 to 70° C. and then separated into water and organic phases and the organic phase with a high ethyl acetate content is drawn off and partially returned as reflux flow into this system, whereby, the ratio of the starting components feed and the organic reflux flow is 1:1 to 1:20. This invention also relates to equipment for carrying out this method.

Description

Invention field [0001] The invention relates to a method for synthesizing ethyl acetate through the esterification of acetic acid and ethanol or through the reaction of acetic anhydride and ethanol. The method adopts catalytic distillation in a tower. During the catalytic distillation, the reaction and the reaction on the catalytically active packing occur simultaneously The product is separated by distillation. The invention also relates to equipment for implementing the method. Background of the invention [0002] Ethyl acetate is prepared by the reaction of ethanol and acetic acid. In addition to ethyl acetate, the reaction also produces water. Alternatively, ethyl acetate can be prepared by the reaction of acetic anhydride and ethanol, in which acetic acid is also generated in addition to ethyl acetate. The resulting acetic acid is further esterified by another part of ethanol. Esterification is an equilibrium reaction, which is promoted by the presence of an acid catalyst. T...

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 Patents(China)
IPC IPC(8): B01D3/00B01D3/14B01J8/02B01J10/00C07B61/00C07C67/08C07C67/54C07C69/14
CPCB01D3/009B01J8/025B01J2208/00274B01J2208/00283B01J2208/00513C07C67/08Y02P20/10C07C69/14
Inventor J·科莱纳J·莱德雷尔P·莫拉维克J·哈尼卡Q·斯梅卡D·斯卡拉
Owner SULZER CHEMTECH AG