Unlock instant, AI-driven research and patent intelligence for your innovation.

A system and method for continuous production of low molecular weight polyetheramine

A low molecular weight polyether, part of the technology, applied in chemical instruments and methods, chemical/physical processes, chemical/physical/physical chemical processes, etc., can solve the problems of many side reactions, large equipment investment, unsuitable catalysts, etc. achieve the effect of increasing the conversion rate

Active Publication Date: 2022-08-05
扬州晨化新材料股份有限公司
View PDF17 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the products of the batch kettle method have unstable quality, many side reactions, and are not easy to realize automatic control. Realize automatic control
However, the method for preparing polyetheramine by the above-mentioned continuous method has disadvantages such as complicated equipment, large equipment investment, low equipment efficiency, and complicated operation; more importantly, continuous fixed-bed or tubular reactors need to prepare or use specially prepared catalysts , catalysts with short life and easy deactivation are not suitable for fixed bed or tubular reactors (catalysts cannot be replaced during operation), etc.

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
  • A system and method for continuous production of low molecular weight polyetheramine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] The reaction is carried out by adopting 3 loop circulation reactors 6 which are continuously fed and connected in series with each other. The volume of the loop circulation reactor 6 is 3000L, and each loop circulation reactor 6 is filled with lightning which accounts for 1 / 3 of the volume of the loop circulation reactor 6. Nickel-nickel catalyst and Raney-nickel catalyst are fixed in the loop recycle reactor 6 .

[0061] When working, first open the first control valve 16 on the corresponding branch pipe 11 of the first-stage loop circulation reactor 6, and the second control valve between the discharge port of the polyether polyol tank 2 and the first-stage loop circulation reactor 6 17.

[0062] The polypropylene glycol ether (molecular weight of 230) in the polyether polyol tank 2 is preheated to 100-110 °C by the preheater 12 and mixed with the liquid ammonia and hydrogen mixture transported by the liquid ammonia and hydrogen transport pipeline 1, and then goes dow...

Embodiment 2

[0073] Three loop circulation reactors 6 with continuous feeding and connected in series are used for the reaction. The volume of the loop circulation reactor 6 is 3000L. Nickel-nickel catalyst and Raney-nickel catalyst are fixed in the loop recycle reactor 6 .

[0074] First open the first control valve 16 on the corresponding branch pipe 11 of the first-stage loop circulation reactor 6 and the second control valve 17 between the discharge port of the polyether polyol tank 2 and the first-stage loop circulation reactor 6 .

[0075]The trimethylolpropane polypropylene glycol ether (molecular weight 430) in the polyether polyol tank 2 is preheated to 100-110°C by the preheater 12 and mixed with the liquid ammonia and hydrogen mixture transported by the liquid ammonia and hydrogen transport pipeline 1, and then passed through the preheater 12. The injector 9 is continuously fed downward into the first-stage loop reactor 6 .

[0076] Among them, the feeding speed of trimethylolp...

Embodiment 3

[0086] The reaction is carried out by adopting 2 loop circulation reactors 6 which are continuously fed and connected in series with each other, the volume of the loop circulation reactor is 3000L, and each loop circulation reactor 6 is filled with Raney nickel catalyst accounting for 1 / 4 of the volume of the reactor, The Raney nickel catalyst was immobilized in the loop reactor 6 .

[0087] First open the first control valve 16 on the corresponding branch pipe 11 of the first-stage loop circulation reactor 6 and the second control valve 17 between the discharge port of the polyether polyol tank 2 and the first-stage loop circulation reactor 6 .

[0088] The polyethylene glycol and polypropylene glycol ether (molecular weight of 600) in the polyether polyol tank 2 is preheated to 100-110°C by the preheater 12 and mixed with the liquid ammonia and hydrogen mixture transported by the liquid ammonia and hydrogen transport pipeline 1, and then sprayed through the preheater 12. The...

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

A system and method for continuous production of low molecular weight polyetheramines relate to the technical field of hydrogenated ammonia (amination) of polyether polyols. The system and method adopts a one-stage or multi-stage series-connected loop reactor, the upper part of the loop loop reactor is provided with an ejector with the nozzle facing down, and the bottom is provided with a reactant outlet, and the reactant of the loop loop reactor is provided The discharge port is connected with a circulation pump through the discharge valve, and the outlet of the circulation pump is connected with the inlet of the injector in the loop circulation reactor. Compared with the prior art, the process of the present invention is simple, and the reaction can be carried out by adopting multiple loop circulation reactors connected in series, thereby effectively reducing the influence of water produced by side production on the reaction during the amination reaction of the low-molecular-weight polyether polyol; and Part of the reactants obtained by the reaction of the loop circulation reactors at all levels are returned to the loop circulation reactors of the corresponding levels, so that the incompletely reacted materials can be further reacted in the reactors, and the conversion rate of ammoniation can be improved.

Description

technical field [0001] The invention relates to the technical field of hydrogenated ammonia (amine)ization of polyether polyols, in particular to a system and method for continuous production of low molecular weight polyether amines. Background technique [0002] Polyetheramine (PEA): It is a kind of polymer whose main chain is polyether structure and terminal active functional group is amine group. Polyetheramine is obtained by using polyether polyol as reaction raw material, and is obtained by ammoniation under high temperature and high pressure. A series of properties such as reactivity, toughness, viscosity and hydrophilicity of polyetheramine can be adjusted by selecting different polyoxyalkylene structures, and the amine group provides the possibility of reacting polyetheramine with various compounds. [0003] A series of amine compounds can be prepared by subjecting polyether polyols containing terminal hydroxyl groups to hydrogenation (amination) reaction, which can...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/325B01J4/00B01J19/00
CPCC08G65/3255B01J19/0006B01J19/0013B01J4/001B01J4/008C08G2650/04
Inventor 房连顺董晓红贾正仁
Owner 扬州晨化新材料股份有限公司
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com