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Device used of high-pressure production of high-solid low-viscosity acrylic acid in laboratories, and production process

A technology for laboratory and preparation equipment, which is applied in the field of high-solid and low-viscosity acrylic acid preparation equipment for high-pressure production in the laboratory, and can solve the problems of large solvent usage, long process route, and failure to realize PLC automatic control, etc.

Pending Publication Date: 2020-01-14
无锡嘉泰化工设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The finished product prepared by this method has high impurities, a large amount of solvent used, a long process route, and the automatic control of PLC is not realized.

Method used

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  • Device used of high-pressure production of high-solid low-viscosity acrylic acid in laboratories, and production process
  • Device used of high-pressure production of high-solid low-viscosity acrylic acid in laboratories, and production process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as figure 1 As shown, a laboratory high-pressure production of high-solid low-viscosity acrylic acid preparation equipment, including a reaction kettle for holding the reaction solvent, a feeding device for adding raw materials, a stirring device for reaction stirring, and a reaction liquid The back distillation device for feeding back and the discharge device for outputting the reaction product; the feeding device, the stirring device, the back distillation device and the discharge device are respectively installed on the reaction kettle.

[0028] In order to facilitate the heating or cooling of the mixture in the reactor, the preparation device of the present invention also includes a heating and cooling device for heating and cooling the reaction liquid, and the heating and cooling device is installed on the outer wall of the reactor.

[0029] In order to facilitate the monitoring of the pressure in the reactor and prevent danger caused by excessive pressure, th...

Embodiment 2

[0032] A production process for a high-solid and low-viscosity acrylic acid preparation device for high-pressure production in a laboratory, comprising the following steps:

[0033] (1) add initiator, monomer raw material and butyl acetate solvent in reactor by feeding device;

[0034] (2) The mixture in the reactor is heated by the heating and cooling device; meanwhile, the mixture is stirred and reacted by the stirring device;

[0035] (3) carry out back distillation condensation to the hot steam of the butyl acetate solvent that reaction in reactor produces by back distillation device;

[0036] (4) The pressure in the reaction kettle is detected by the pressure sensing device, and the detection data is transmitted to the control device. When the pressure in the reaction kettle reaches the preset upper limit, the control device controls the pressure regulating device to open and release Pressure, when the pressure in the reactor reaches the preset lower limit, the control d...

Embodiment 3

[0040] A laboratory high-pressure production of high-solid and low-viscosity acrylic acid preparation equipment, including a frame 1, a high-pressure reactor 2 is fixedly installed on the frame 1, a magnetic coupling stirrer 3 is sealed and installed on the high-pressure reactor 2, and the magnetic coupling The stirring shaft of the agitator 3 extends into the autoclave 2, and a gooseneck (not shown) is also installed on the autoclave 2, one end of the gooseneck is connected with the autoclave 2, and the other end of the gooseneck is One end is connected with the tubular condenser 5, and the return end of the tubular condenser 5 is communicated with the high-pressure reactor 2, and the high-pressure reactor 2 is also provided with a dosing metering pump (not shown) for adding raw materials, A plunger type sampling valve 6 is installed at the bottom of the autoclave 2 to discharge the product after the reaction. A pressure sensor for detecting the reaction pressure, a back press...

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Abstract

The invention discloses a device used of high-pressure production of high-solid low-viscosity acrylic acid in laboratories, and production process, and belongs to the technical field of high-pressureproduction of high-solid low-viscosity acrylic acid. The device comprises a reaction kettle for containing a reaction solvent, a feeding device used for adding raw materials, a stirring device used for reaction stirring, a back distillation device used for removing impurities through material reflux of reaction liquid, a discharging device used for reaction product discharging, a pressure regulating device used for regulating pressure, and a heating device used for controlling heating temperature; the feeding device, the stirring device, the back distillation device, and the discharging deviceare arranged on a reaction kettle respectively. According to the production process, a magnetic coupling stirrer which is good in sealing performance with the reaction kettle and is capable of providing effective stirring at high pressure environment is adopted, full regulation of the pressure is realized, butyl acetate higher in solubility and purity is adopted as a solvent, solvent using amountis reduced, and the quality of finished product acrylic acid can be improved obviously.

Description

technical field [0001] The invention relates to the technical field of high-solid and low-viscosity acrylic acid produced by high pressure, in particular to a laboratory high-pressure production of high-solid and low-viscosity acrylic acid preparation device and its application method. Background technique [0002] At present, the preparation of acrylic acid usually adopts an atmospheric process with simple equipment, using xylene as a solvent, using a dropping tank, and a solvent sublimation recovery process. The finished product prepared by this method has high impurities, a large amount of solvent used, a long process route, and no PLC automatic control. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a laboratory high-pressure production device for producing high-solid and low-viscosity acrylic acid with high product quality and its use method. [0004] In order to solve the problems of the technologies desc...

Claims

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Application Information

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IPC IPC(8): B01J3/04B01J3/02B01J3/03
CPCB01J3/04B01J3/02B01J3/03B01J3/002
Inventor 张朝霞彭继滨向科炜
Owner 无锡嘉泰化工设备有限公司
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