Packing for reaction tube, reaction tube, and reaction method using same

Patent metadata

Field	Value
Publication number	US-2016279587-A1
Application number	US-201415033749-A
Country	US
Kind code	A1
Filing date	Oct 30, 2014
Priority date	Nov 7, 2013
Publication date	Sep 29, 2016
Grant date	—

Abstract

In a fixed-bed flow reaction using a multitubular heat exchange type reactor, an object of the present invention is to provide a novel packing for a reaction tube, which can control the reaction ratio in the vicinity of the reaction tube inlet, reduce the load unevenly placed on the catalyst in the reaction region, and distribute the load on the entire catalyst layer, a heat exchange type reactor, and a reaction method using the reaction tube. The packing for a reaction tube of the present invention is characterized in that the volume is continuously or step-by-step decreased from one end part or midway toward the other end part.

First claim

1 . A packing for a reaction tube, wherein the volume is continuously or step-by-step decreased from one end part or midway toward the other end part.

2 . The packing for a reaction tube according to claim 1 , further having an opening part to allow passage of fluids.

3 . The packing for a reaction tube according to claim 2 , wherein a ratio of the opening part decreases from one end part with a large volume to the other end part with a small volume.

4 . The packing for a reaction tube according to claim 1 , wherein the figure is a pyramid, a truncated pyramid, a half ellipsoid, or a half spindle.

5 . The packing for a reaction tube according to claim 4 , wherein the figure is a cone.

6 . The packing for a reaction tube according to claim 1 , comprising a plurality of circular tubes having different tube diameters, wherein the circular tubes are concentrically arranged in a step-by-step decreasing order of tube diameters from an outer periphery part to a center part, and the packing for a reaction tube has an opening part on a boundary part between steps.

7 . A reaction tube, comprising a structure therein, wherein the volume of the structure is continuously or step-by-step decreased from one end part or midway toward the other end part.

8 . The reaction tube according to claim 7 , wherein the structure further has an opening part to allow passage of fluids.

9 . The reaction tube according to claim 8 , wherein a ratio of the opening part decreases from one end part of the structure with a large volume to the other end part of the structure with a small volume.

10 . The reaction tube according to claim 7 , wherein the maximum cross-sectional area of the structure is 10% or more and 100% or less of the cross-section area of the reaction tube, the minimum cross-sectional area of the structure is 0% or more and 50% or less of the cross-section area of the reaction tube, and the length of the structure is 10% or more and 90% or less of the length of a catalyst layer.

11 . The reaction tube according to claim 7 , wherein the figure of the structure is a pyramid, a truncated pyramid, a half ellipsoid, or a half spindle.

12 . The reaction tube according to claim 11 , wherein the figure of the structure is a cone.

13 . The reaction tube according to claim 7 , wherein the structure comprises a plurality of circular tubes having different tube diameters, the circular tubes are concentrically arranged in a step-by-step decreasing order of tube diameters from an outer periphery part to a center part, and the structure has an opening part on a boundary part between steps.

14 . A heat exchange type reactor, comprising the reaction tube according to claim 7 .

15 . A reaction method comprising the step of getting a raw material fluid through the reaction tube according to claim 7 filled with a catalyst from the end part side with a large volume of the structure.

Assignees

• Nippon Catalytic Chem Ind

Inventors

• Shimasaki Yuuji

Classifications

• B01J2219/30226

  Cone or truncated cone · CPC title

• C07D301/08

  in the gaseous phase · CPC title

• B01J2219/30253

  Pyramid · CPC title

• C07D307/60 Primary

  Two oxygen atoms, e.g. succinic anhydride · CPC title

• B01J2208/065

  Heating or cooling the reactor · CPC title