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Multi-phase catalyst reaction method, and reaction equipment therefor

A heterogeneous catalyst and reaction technology, used in organic chemistry methods, chemical instruments and methods, preparation of organic compounds, etc., can solve problems such as increased side reactions, operational difficulties, accelerated polymerization of raw materials and products, etc., to avoid clogging, Prevention of side reactions and polymerization, effective separation

Inactive Publication Date: 2002-02-20
NIPPON SHOKUBAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The stagnant part in the reactor will not only reduce the reaction rate and increase side reactions, but also accelerate the polymerization of raw materials and products, which will also make the operation difficult

Method used

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  • Multi-phase catalyst reaction method, and reaction equipment therefor
  • Multi-phase catalyst reaction method, and reaction equipment therefor
  • Multi-phase catalyst reaction method, and reaction equipment therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0185] The formation reaction of methyl acrylate was carried out using a fixed bed reactor.

[0186] Product: methyl acrylate

[0187] Raw materials: acrylic acid, methanol

[0188] Reactor: fixed bed reactor (refer to figure 1 ), a diameter of 1400mm, a height of 2300mm, and a capacity of 3.5m in the straight barrel 3 , resin installation volume 2.0m 3 .

[0189] Solid-liquid separator: Johnson screen (trade name, sold by JGC Yunibasaru Co., Ltd.), cylindrical type, and the effective filtering part (linear screen) is arranged at a position 10mm lower than the partition plate (refer to figure 2 ), the outer diameter of the cylindrical screen is 50mm, the effective length is 170mm, the wire width is 1.5mm, the gap width is 0.3mm, and the number of settings is 20 (13.0 pieces / m 2 ), the effective filter area is 0.534m 2 (0.027m 2 / piece), opening area 0.089m 2 (0.0044m 2 / indivual).

[0190] Flowing liquid volume: Flowing liquid volume 1.67m 3 / hour, liquid density ...

Embodiment 2

[0199] In Example 1, the part where the linear screen was arranged protruded 15 mm from the upper surface of the partition plate, and this structure was used as the Johnson screen of the solid-liquid separator. The structure in which the gap between the lower end of the linear screen and the surface of the partition plate is left open, and the upper surface of the partition plate slightly retains the reaction liquid.

[0200] -Implementation results-

[0201] After the reaction was carried out for 1000 hours, the polymer was attached to the supporting structure of the wire mesh. Half of the wire is slightly clogged. However, it can be removed after spray cleaning. A part of the wire is cleaned with a brush.

Embodiment 3

[0203] The formation reaction of methyl methacrylate was carried out. The same conditions as in Example 1 are not described again.

[0204] Product: methyl methacrylate

[0205] Original: methacrylic acid, methanol

[0206] Reactor: fixed bed reactor (refer to figure 1 ), with a diameter of 1800mm and a height of 2500mm, used in a liquid-filled state.

[0207] Solid-liquid separator: Johnson screen (trade name, sold by Nikki Yunibasaru Co., Ltd.), the outer diameter of the cylindrical screen is 60mm, the effective length is 170mm, the wire member is 1.5mm wide, the gap is 0.15mm wide, and the number of installations is 20 (4.8 piece / m 2 ), the effective filter area is 0.64m 2 (0.032m 2 / piece), opening area 0.058m 2 (0.0029m 2 / indivual).

[0208] Flowing liquid volume: Flowing liquid volume 3.00m 3 / h, liquid density 900kg / m 3 , The effective filter area flows through the speed of 1.30mm / s, and the opening part flows through the linear speed of 14mm / s.

[0209] H...

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Abstract

A method involves carrying out a reaction in liquid phase by using a heterogeneous catalyst particle in a reactor. The objective method comprises the steps of: (a) allowing a reaction liquid 40 supplied into the reactor 10 from such as a supplying inlet 12 to react in the presence of the heterogeneous catalyst particle 30, and (b) passing the resultant reaction liquid 40 containing the heterogeneous catalyst particle 30 through a line screen 20 having an opening width where the heterogeneous catalyst particle 30 is not allowed to pass substantially, and then extracting the reaction liquid 40 separated from the heterogeneous catalyst particle 30 from the reactor 10 by way of such as an extracting outlet.

Description

technical field [0001] The present invention relates to a reaction method using a heterogeneous catalyst such as ion-exchange resin particles as a catalyst and a reaction device used in the method. Specifically, for example, the reaction etc. which produce (meth)acrylic acid ester using (meth)acrylic acid are targeted. Background technique [0002] Known reaction method utilizing ion exchange resin to carry out liquid phase reaction as catalyst has: use the method (fixed bed reaction method) of the reactor of fixed filling ion exchange resin; Suspend and disperse ion exchange resin in reaction liquid phase and carry out reaction, A method of post-separation of the reaction solution and ion exchange resin (fluid bed reaction method). [0003] The fluidized bed reaction method is preferred due to its high reaction efficiency. [0004] Japanese Patent Publication No. Showa 49-54326 reports a method in which gas is introduced from the bottom of the reactor to suspend and dispe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J8/02B01J8/00B01J8/18B01J8/20C07B61/00C07C67/08C07C67/26C07C67/56C07C69/54
CPCB01J8/008B01J8/20C07C67/08B01J8/005B01J2208/00867C07C67/26C07C69/54B01J8/00
Inventor 米田幸弘梶原彻也新谷恭宏松本初石田德政
Owner NIPPON SHOKUBAI CO LTD
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