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Dynamic hole jet mixed reactor and method for producing diphenyl methane series diamine and polyamine by using same

A technology of mixing reactor and mixing reaction box, applied in the direction of chemical method, chemical instrument and method, chemical/physical/physical-chemical nozzle reactor for making liquid react with liquid, etc., which can solve problems such as clogging of the reactor

Active Publication Date: 2013-05-08
WANHUA CHEM GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But these known methods can't realize the rapid and thorough mixing of aniline and formaldehyde well, especially in the implementation of large-scale continuous production process, the problem of clogging reactor easily occurs

Method used

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  • Dynamic hole jet mixed reactor and method for producing diphenyl methane series diamine and polyamine by using same
  • Dynamic hole jet mixed reactor and method for producing diphenyl methane series diamine and polyamine by using same
  • Dynamic hole jet mixed reactor and method for producing diphenyl methane series diamine and polyamine by using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] The structure of the dynamic orifice jet mixing reactor adopted in the present invention is as follows: figure 1 , figure 2 and image 3 As shown, the first porous nozzle 5 and the second porous nozzle 6 in the reactor mixing box 4 are 6 respectively, and they are arranged in parallel and staggered, and the ratio of the distance between the two and the diameter of the first feed pipe 1 is 1: 5;. The ratio of the diameter of the first feed pipe 1 to the diameter of the mixing reaction box 4 is 1:50, the diameter of the mixing reaction box 4 is 1.2m, and the radial length d of the interlayer annular section 7 The ratio to the diameter of the mixing reaction box is 1:200; the radial length d of the annular section of the first porous nozzle 5 5 The ratio to the diameter of the mixing reaction box 4 is 1:4; the radial length d of the annular section of the second porous nozzle 6 6 The ratio to the diameter of the mixing reaction box 4 is 1:3; the number, shape and size...

Embodiment 2

[0070] The structure of the dynamic orifice jet mixing reactor adopted in the present invention is as follows: figure 1 , figure 2 and image 3 Shown, the first multi-hole nozzle 5 and the second multi-hole nozzle 6 in the reactor mixing box 4 are respectively 8, and are arranged in a parallel and staggered manner, and the ratio of the distance between the two and the diameter of the first feed pipe 1 is 1: 4. The ratio of the diameter of the first feed pipe 1 to the diameter of the mixing reaction box 4 is 1:35, the diameter of the mixing reaction box 4 is 1.2m, and the radial length d of the interlayer annular section 7 The ratio to the diameter of the mixing reaction box is 1:150; the radial length d of the annular section of the first porous nozzle 5 5 The ratio to the diameter of the mixing reaction box 4 is 1:4; the radial length d of the annular section of the second porous nozzle 6 6 The ratio to the diameter of the mixing reaction box 4 is 1:3; the number, shape ...

Embodiment 3

[0074] The structure of the dynamic orifice jet mixing reactor is the same as in Example 1.

[0075] The condensation reaction process is as Figure 4 As shown in the process flow diagram, hydrochloric acid material 15 (mass concentration is 31.6%, MDI device by-product hydrochloric acid) and aniline material 16 (mass concentration is 99.5% industrial aniline) are mixed by Venturi jet mixing reactor 18, both The molar ratio is 0.38:1, and the reaction generates aniline hydrochloride. The aniline hydrochloride material enters the interlayer 7 of the mixing reaction box 4 through the second feed pipe 2, and then passes through the material flow channels 12 distributed on the second porous nozzle 6 to inject in a direction perpendicular to the second porous nozzle 6. Into the mixing reaction box 4; formaldehyde material flow stream 17 (concentration is 36.8wt%) enters in the first multi-hole shower nozzle 5 by the first feed pipe 1, through the material circulation hole 12 that ...

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Abstract

The invention discloses a dynamic hole jet mixed reactor. A plurality of first multi-orifice sprinklers (5) with material circulating runners (12) and second multi-orifice sprinklers (6) are arranged inside a mixed reaction tank (4) of the reactor; the plurality of multi-orifice sprinklers (5) and second multi-orifice sprinklers (6) are arranged coaxially with a transmission shaft (8); the second multi-orifice sprinklers (6) are fixed at the outer wall of an interlayer (7) of the mixed reaction tank (4) and communicated with the interlayer (7); the plurality of first multi-orifice sprinklers (5) are fixed on a first feeding pipe (1) and communicated with the first feeding pipe (1), and rotate under the drive of the first feeding pipe (1); the first multi-orifice sprinklers (5) and the second multi-orifice sprinklers (6) are arranged in a staggered manner or in parallel; and a second feeding pipe (2) is communicated with the second multi-orifice sprinklers (6) through the interlayer (7) of the mixed reaction tank (4). DAM (dodecanedioic acid dimethyl ester) is generated by the reactor disclosed by the invention; no wall mounting and blocking phenomena of sediments are generated in a circulating pipeline; and impurities in the refined DAM are low in content.

Description

technical field [0001] The invention relates to a dynamic orifice jet mixing reactor and a method for preparing diphenylmethane series diamines and polyamines through the condensation reaction of formaldehyde and aniline hydrochloride using the reactor. Background technique [0002] The diamines and polyamines of the diphenylmethane series (DAM for short) mainly refer to the following types of structural mixtures: [0003] [0004] Where n represents a natural number ≥ 0. [0005] The preparation methods of diamines and polyamines of diphenylmethane series have been described in many published patents and publications, such as WO2008148631, WO2009037088 and so on. In industrial production, DAM is usually obtained through the condensation reaction of aniline and formaldehyde under acid-catalyzed conditions, followed by phosgenation to produce monomeric MDI and polymeric MDI, which is a well-known method in the polyurethane industry. [0006] The condensation reaction of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/26B01J14/00C07C211/51C07C211/50C07C209/78
Inventor 刘小高姚雨张宏科华卫琦丁建生吴雪峰曹鹏尚赵义兵杨勇李晶石德凯
Owner WANHUA CHEM GRP CO LTD