Jet type membrane reactor and method for preparing methylaniline by continuous catalytic hydrogenation

A technology of methyl aniline and membrane reactor, applied in the field of reactors, can solve the problems of increasing large power consumption, affecting product quality, increasing product consumption, etc., achieving the effects of separation efficiency, energy saving, equipment investment saving, and sufficient reaction.

Inactive Publication Date: 2013-10-23
JIANGSU HUAIHE CHEM
View PDF4 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] ① The reaction control temperature is relatively high, and the normal reaction temperature is 250-270°C. The raw materials for the reaction need to be heated and vaporized before being reacted in the fluidized bed, so it is necessary to increase the consumption of steam and electric energy; in addition, because the reaction temperature is relatively high, the reaction There are also more by-products, which not only affect the quality of the product, but also increa

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Jet type membrane reactor and method for preparing methylaniline by continuous catalytic hydrogenation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: Mononitrotoluene is preheated to 100°C and then pumped into the jet mixer. Hydrogen and mononitrotoluene are fully mixed in the jet mixer and then enter the reactor body, under the action of the catalyst-Raney nickel. Reduction reaction, the reacted material flows through the membrane module, the membrane in the membrane module is a flat ceramic membrane, the catalyst is trapped in the reactor body for recycling, part of the permeate is extracted as a crude product, and part of the permeate passes through the heat exchanger The heat is exchanged and circulated to the jet mixer by the circulation pump. After analysis and testing, the conversion rate of the reaction was 95%.

Embodiment 2

[0024] Example 2: Mononitrotoluene is preheated to 110°C and then pumped into the jet mixer. Hydrogen and mononitrotoluene are fully mixed in the jet mixer and then enter the reactor body for reduction under the action of the catalyst-palladium carbon reaction, the reacted material flows through the membrane module, the membrane in the membrane module is a tubular mullite membrane, the catalyst is trapped in the reactor body for recycling, part of the permeate is extracted as a crude product, and part of the permeate is processed through heat exchange The heat exchanger is exchanged and circulated to the jet mixer by the circulation pump. After analysis and testing, the conversion rate of the reaction was 96%.

Embodiment 3

[0025] Example 3: Mononitrotoluene is preheated to 120°C and then pumped into the jet mixer. Hydrogen and mononitrotoluene are fully mixed in the jet mixer and then enter the reactor body. The reduction reaction is carried out under the action of the reaction, and the reacted material flows through the membrane module. The membrane in the membrane module is a tubular hollow fiber membrane, and the catalyst is trapped in the reactor body for recycling. The liquid is heat-exchanged through the heat exchanger and circulated to the jet mixer by the circulation pump. After analytical testing, the conversion rate of the reaction was 98%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a jet type membrane reactor and a method for preparing methylaniline by continuous catalytic hydrogenation. The jet type membrane reactor comprises a reactor body (1), a jet mixer (2) and a membrane assembly (3), wherein the jet mixer (2) is arranged at the top in the reactor body (1), the membrane assembly (3) is positioned below a discharging hole of the jet mixer (2) in the bottom in the reactor body (1), the jet mixer (2) is provided with a liquid phase feeding hole, a gas phase feeding hole and a circulating feeding hole, and a product discharging hole is formed in a place of the reactor body (1), which penetrates through the membrane assembly (3). The jet type membrane is compact in structure, small in occupation area and simple in process route, is reduced in energy consumption, and accords with the requirement of sustainable development.

Description

technical field [0001] The invention relates to a reactor and a method, in particular to a jet-type membrane reactor and a method for preparing methylaniline through continuous catalytic hydrogenation. Background technique [0002] Toluidine is usually used as an intermediate for dyes, medicines, and pesticides, and can also be used as a color developer. In analytical chemistry, it is also used as an impregnating solution for mineral refractive index in addition to being a solvent. Toluidine is widely used in dyestuff, medicine, pesticide, food, health care, imaging and other industries. In recent years, the demand for toluidine in the domestic market has shown a continuous growth trend. In 2009, 2010 and 2011, it increased by 8.26%, 28.47% and 1.17% respectively compared with the previous year, and the annual demand exceeded 80,000 tons. The Chinese market has become the largest consumer market for toluidine in the world, and the annual consumption even reaches about 50% o...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B01J8/08B01J19/26C07C209/36C07C211/47
Inventor 夏珊珊董云夏文标安礼如万金方孙小勇厉业敏
Owner JIANGSU HUAIHE CHEM
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap