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Batch reactor

A reactor and batch technology, applied in chemical/physical/physicochemical fixed reactors, chemical instruments and methods, mixers, etc., can solve problems such as temperature deviation and adverse effects on final product quality, to ensure particle stability sexual effect

Pending Publication Date: 2021-05-14
HANWHA SOLUTIONS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the ratio of the height of the batch reactor to the diameter of the batch reactor is increased, the mixing between the upper and lower parts of the batch reactor is restricted, a temperature deviation between the upper and lower parts occurs, and the final product the quality of the

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Reactant 110 is charged as attached figure 1 The shown batch reactor 100 comprising two curved impellers 132 and 133 was then stirred at a power of 110 W and a speed of 315 rpm. Reactant 110 is 50.5% by weight vinyl acetate ethylene (VAE), 0.1% by weight polyvinyl alcohol (PVA), 2.1% by weight vinyl acetate monomer (VAM), 0.5% by weight ethylene and 42.4% by weight Distilled water, ethylene are supplied through supply nozzles 140 connected to the bottom 122 . The rotation diameter (D1) of the curved impellers 132 and 133 is 0.2 m, and the distance S1 between the curved impellers 132 and 133 is 0.6 m. The ratio of the spacing S1 between the curved impellers 132 and 133 to the rotation diameter D1 of the curved impellers 132 and 133 is three. The cylindrical reactor body 120 has a height-to-diameter ratio of 2, and the temperature in the batch reactor 100 is maintained at 80°C and the pressure is maintained at 80 bar(g).

Embodiment 2

[0068] Evaluation Example 2: Mixing Time

[0069] In order to compare the mixing efficiency in the VAE polymerization reaction, the mixing times of Example 1 and Comparative Example 2 were measured and shown in Table 2 below. In Table 2, S / D refers to the ratio of the pitch between the curved impellers to the rotational diameter of the curved impellers.

[0070] Table 2

[0071] Number of curved impellers S / D Mixing time (sec) Example 1 2 3 74 Comparative example 2 3 1.5 153

[0072] It can be confirmed from Table 2 that in the case of Comparative Example 2, since the ratio of the distance between the curved impellers to the rotational diameter of the curved impellers is less than 2, although the number of curved impellers is large, compared with Example 1, the measured The mixing time is significantly increased.

Embodiment 3

[0073] Evaluation Example 3: Gas holdup

[0074] In order to compare the reaction rate in the VAE polymerization, the gas holdups of Example 1 and Comparative Example 1 were measured and shown in Table 3 below, and the gas holdups of Example 1 and Comparative Example 3 were measured and shown in the table below 4 in.

[0075] table 3

[0076] impeller type Gas holding rate (%) Example 1 curved impeller 5.6 Comparative example 1 rotating belt 4.2

[0077] From Table 3, it can be confirmed that the curved impeller of the present disclosure exhibited a higher polymerization reaction rate of VAE compared to the helical ribbon impeller.

[0078] Table 4

[0079] Air supply nozzle position Gas holding rate (%) Example 1 bottom 5.6 Comparative example 3 Lower end of side wall 5.3 Comparative example 3 Middle end of side wall 5 Comparative example 3 upper end of side wall 4

[0080] From Table 4, i...

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Abstract

A batch reactor of the present invention comprises: a cylindrical reactor main body; a supply nozzle for supplying a material; at least one curved impeller; and a rotating shaft connected to the curved impeller, wherein the curved impeller comprises bent stirring wings and is used for a vinyl acetate-ethylene (VAE) polymerization reaction.

Description

[0001] Cross References to Related Applications [0002] This application claims priority from Korean Patent Application No. 10-2018-0122819 filed with the Korean Intellectual Property Office on October 15, 2018, the disclosure of which is incorporated herein by reference in its entirety. technical field [0003] The present disclosure relates to a batch reactor, and more particularly, to a batch reactor equipped with an impeller. Background technique [0004] VAE (vinyl acetate-ethylene) refers to the term for the copolymer of ethylene and vinyl acetate, and the VAE polymerization reaction is carried out by the addition polymerization of ethylene and vinyl acetate, and a batch reactor with an impeller can be used . [0005] A conventional batch reactor includes a reactor body for charging reactants, an impeller installed in the reactor body for stirring the reactants, and a driving motor for rotating the impeller. [0006] In general, batch exothermic reaction processes r...

Claims

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Application Information

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IPC IPC(8): B01J19/20
CPCB01J19/20B01J19/0066B01J2219/00779B01F27/1123B01F27/11451B01F27/191B01F27/906B01F27/92B01J2219/00029B01J2219/0036B01J2219/00479B01J2219/00736B01J2219/00051
Inventor 安佑烈李信范姜巴蔚金良中李在赫
Owner HANWHA SOLUTIONS CORP
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