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A kind of production equipment and method of polyamide 5x

A production equipment and polyamide technology, applied in the field of polyamide 5X production equipment, can solve the problems of unsuitable polyamide 5X continuous preparation, low polymerization reaction efficiency, complex device structure, etc., to ensure integrity and high efficiency, and simple structure , good safety effect

Active Publication Date: 2019-12-03
CATHAY R&D CENT CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the existing equipment for continuous polymerization has a complex structure and low polymerization efficiency, which is not suitable for the continuous preparation of polyamide 5X

Method used

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  • A kind of production equipment and method of polyamide 5x
  • A kind of production equipment and method of polyamide 5x
  • A kind of production equipment and method of polyamide 5x

Examples

Experimental program
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Effect test

preparation example Construction

[0125] Preparation of polyamide salt solution

[0126] 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

[0141] 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

[0143] 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.

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Abstract

The invention provides production equipment and method of polyamide 5X. The production equipment comprises a concentration device, a prepolymerization device, a pressure reducing device, a separating device and a final polymerization device which are connected in sequence. The concentration device, the prepolymerization device, the pressure reducing device, the separating device and the final polymerization device are adopted in the production equipment of polyamide 5X, operation of all production links is guaranteed, and the production equipment and method are especially suitable for producing polyamide 5X.

Description

technical field [0001] The invention relates to a polyamide production equipment and method, in particular to a polyamide 5X production equipment and method. 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. The above-mentioned processes are all short-range polymerization ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G69/28C08G69/46B01D1/12B01D1/30B01J19/24B01J3/04B01J19/20
Inventor 秦兵兵郑毅刘驰刘修才
Owner CATHAY R&D CENT CO LTD
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