A device and separation method for preparing polyamide 5x, and production equipment and method for polyamide 5x

A polyamide and separation device technology, applied in separation methods, chemical instruments and methods, evaporation, etc., can solve problems such as insignificant moisture removal effect, and achieve the effects of enhancing stirring effect, good separation effect, and reducing gel formation.

Active Publication Date: 2018-08-28
CATHAY R&D CENT CO LTD +1
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, flash evaporation is mainly to vaporize the water in the reaction system to obtain a gas-liquid mixed foam polymer, and the effect of removing water is not obvious

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 device and separation method for preparing polyamide 5x, and production equipment and method for polyamide 5x
  • A device and separation method for preparing polyamide 5x, and production equipment and method for polyamide 5x
  • A device and separation method for preparing polyamide 5x, and production equipment and method for polyamide 5x

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0075] Preparation of polyamide salt solution

[0076] Under the protection of nitrogen, the high-concentration 1,5-pentanediamine is diluted with degassed deionized water to a certain concentration solution (30%-50%). The aliphatic dibasic acid and the diluted 1,5-pentanediamine are continuously added to the reactor at the same time, and the cooling water removes the heat of reaction during the neutralization reaction in time. During the neutralization process, the pH value of the solution is constantly detected, so that the mol ratio of the diamine / diacid in the reactor is slightly lower than 1. After stabilization, the resulting salt solution is transferred to the reactor in series behind (can be connected in series) multiple units, but generally not more than 3 units), use diamine aqueous solution to further neutralize step by step and adjust the molar ratio of diamine / diacid and the mass concentration of salt, and control the flow of diamine aqueous solution with the data...

Embodiment 1

[0091] Configuration pH is the 56 salt solution of 65% concentration of 7.95, carries out polymerization by the condition of table 1 through the production equipment of described polyamide 5X, and kettle body pressure is 210mmHgA, obtains the slice that relative viscosity is 68.9, and its terminal amino content is 40.4.

Embodiment 2

[0093] Configuration pH is the 56 salt solution of 65% concentration of 8.05, carries out polymerization according to the condition of implementing 1 through the production equipment of described polyamide 5X, but the pressure of still body is adjusted to 180mmHg A, and output improves 20% compared with embodiment 1 %, to obtain slices with a relative viscosity of 69.7 and an amino group content of 40.1.

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 provides a device and method for preparing polyamide 5X. The device is a separation device which comprises a kettle, an extrusion cylinder connected with the kettle, a conveying screw arranged on the extrusion cylinder and a frame stirrer which is arranged on the kettle and connected with the conveying screw, wherein the frame stirrer comprises a stirring frame and a helical ribbon connected with the stirring frame. According to the device for preparing polyamide 5X, the kettle wall is scraped continuously through through holes formed in the side wall of the stirring frame, and formation of gel is reduced; meanwhile, materials can flow on the inner side and the outer side of the stirring frame through the through holes, the stirring effect is strengthened, and the separating effect is better. The invention further provides a production equipment and method of polyamide 5X.

Description

technical field [0001] The invention relates to a device and method for preparing polyamide, in particular to a device for preparing polyamide 5X, a separation method, and production equipment and method for polyamide 5X. Background technique [0002] In the prior art, polyamide polymerization methods can generally be classified into thermal polycondensation or interfacial polycondensation. For example: (BaconKe, A.W.Sisko, Differential thermal analysis of high polymers. III. Polyamides, Journal of Polymer Science Vol. 50 No. 153, Pages 87-98, March 1961) describes the thermal polycondensation method, however, according to It is reported that the polyamide produced by the heating polycondensation method has a lower melting point and deteriorates heat resistance than the interfacial polycondensation method (J. Polym. Sci. 50, 87, 1961; Macromolecules, 30, 8540, 1998). However, the interfacial polycondensation process is very complicated and difficult to apply in industry. T...

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): C08G69/46C08G69/26B01D1/00
Inventor 秦兵兵郑毅刘驰刘修才
Owner CATHAY R&D CENT CO LTD
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