Catalytic distillation filler with alternative flow structure

A technology of catalytic rectification and flow structure, applied in chemical instruments and methods, chemical/physical processes, chemical/physical/physical chemical processes, etc., can solve the problem of increasing the reaction surface area, increasing the pressure drop in the tower, plugging the packing layer, etc. question

Active Publication Date: 2012-12-19
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Small-particle resin catalysts are generally used in industry to increase the reaction surface area. When the catalyst particle size is small, placing it directly in the tower will increase the pressure drop in the tower or even block the packing layer.

Method used

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  • Catalytic distillation filler with alternative flow structure
  • Catalytic distillation filler with alternative flow structure
  • Catalytic distillation filler with alternative flow structure

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0022] In the raw material pretreatment of MTBE (methyl tert-butyl ether) plant, C 4 、C 5 For catalytic hydrogenation, the packing adopts window-opening diversion packing and metal calendered orifice corrugated packing. There are 15 packing sheets in each layer of packing disc, a total of 30 packing sheets, and there are 3 packing sheets in each component A and component B. , The wire mesh is made of stainless steel, the mesh number is 18 mesh, the tower diameter is DN600, and the upper and lower packings rotate 15°. The use of the catalytic rectification filler of the present invention is compared with the use of common bundled catalysts. Experiments show that the volume fraction of butadiene is reduced by more than 30%, the volume fraction of dimethyl ether is reduced by 9%-15%, and other impurities are reduced by 5%-23%. 2-Butene increased by more than 28%.

specific Embodiment 2

[0023] In the production of MTBE (methyl tert-butyl ether) equipment, the packing adopts window-opening diversion packing and metal orifice corrugated packing. There are 12 packing sheets in each layer of packing tray, a total of 24 packing sheets. Each component A and There are 2 packing sheets in component B, the wire mesh is made of stainless steel, the mesh number is 35 mesh, the tower diameter is DN600, and the upper and lower packings are rotated 90°. Using the catalytic rectification filler of the present invention compared with the use of common bundled catalysts, the methanol content is reduced by 12.8%, C 4 21.0% reduction in mixture, C 5 The mixture is reduced by 27.7%, other impurities are reduced by 10.3%-46.9%, and the MTBE content is increased by 1.61 percentage points.

specific Embodiment 3

[0024] During the hydrolysis process of methyl acetate, the fillers are window-opening diversion fillers and honeycomb fillers. There are 50 filler sheets in each layer of packing sheets, a total of 100 packing sheets, and there are 2 packing sheets in each component A and component B. The wire mesh is made of nylon, the mesh number is 60 mesh, the tower diameter is DN1200, the upper and lower packings are rotated 60°, and the packing discs are installed in blocks. Using the catalytic rectification filler of the present invention is compared with the use of common bundled catalysts, the hydrolysis rate of methyl acetate is increased by 5.3%-10.9%, and the product yield is increased by about 9%.

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Abstract

The invention relates to catalytic distillation filler with an alternative flow structure. Two assemblies A and B are arranged inside a filler layer. The assembly A is formed by assembling filler sheets of windowing stream guidance type fillers, externally coating a layer of a wire mesh, internally fixing a catalyst and sewing the wire mesh. The assembly B is regular filler, such as the windowing stream guidance type filler, corrugated filler, wire mesh corrugated filler, orifice corrugated filler, rolled pore plate corrugated filler, honeycomb filler and the like. The assembly B and the assembly A are alternatively and vertically placed to obtain the efficient catalytic distillation filler provided by the invention. A window for the windowing stream guidance type filler can improve an atmosphere liquid mass transfer process; gas liquid repeatedly and alternatively flows between the window and the filler sheets, so that the use amount of the catalyst is reduced, and the contact time of a reactant and the catalyst can be controlled by adjusting the amount of the catalyst. The assembly A and the assembly B are alternatively placed, so that the reactant and products can be continuously separated to a tower top and a tower bottom, and a reaction is pushed to be carried out.

Description

technical field [0001] The invention relates to a catalytic rectification filler with an alternating flow structure, which belongs to the technical category of catalytic rectification in the chemical industry, and in particular relates to process optimization and strengthening in a catalytic rectification tower. Background technique [0002] The catalytic distillation process has both reaction and separation, so the packing in the tower must have both catalytic function and gas-liquid mass transfer function. The products after the catalytic reaction of raw materials in the tower are separated to promote the reaction to continue. The packing structure of the catalytic distillation tower directly affects the efficiency of the process. It is necessary for the packing to ensure that the gas-liquid phase in the tower is fully mixed and contacted, and at the same time make the contact time range between the reactant and the catalyst large and controllable. Small-particle resin cat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/32
Inventor 刘春江丁晖殿何泷袁希钢俞旭峰
Owner TIANJIN UNIV
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