Polyamide synthesis including multiple back-ends

A technology of polyamide and post-polycondensation, which is applied in the direction of distillation separation, separation methods, chemical instruments and methods, etc., can solve problems such as limited size, and achieve the effect of avoiding capacity bottlenecks, economical equipment costs, and economical costs

Inactive Publication Date: 2020-03-31
INVISTA TEXTILES (U K) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the size of the method backend limits the size of the entire method
When any part in the backend needs to be shut down for maintenance (which can be a difficult and burdensome procedure), the entire manufacturing method must be shut down

Method used

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  • Polyamide synthesis including multiple back-ends
  • Polyamide synthesis including multiple back-ends
  • Polyamide synthesis including multiple back-ends

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0082] The present invention can be better understood by referring to the following examples provided by way of example. The present invention is not limited to the examples given herein.

[0083] Throughout the examples, X represents the same cost. Throughout the examples, Z represents the same cost.

Embodiment 3a

[0122] Example 3a. Continuous process with multiple finishers.

[0123] Following the method described in Example 1a, a system including a unit of approximately three times the size and processing three times the flow rate was used, similar to Example 1c. However, instead of the single finisher of Example 1c, two parallel finishers were used, and the stream from the flasher was split evenly between the finishers.

[0124] The salt pond delivers materials to the evaporator at about 315L / min, has a volume of about 12,000L, costs about 3*Z to purchase and build into the system, and costs about 3*X / h to run. The evaporator delivers material into the reactor at about 225L / min, has a volume of about 12,000L, costs about 9*Z to purchase and build into the system, and costs about 12*X / h to run. The reactor delivers material to the flash evaporator at about 180 L / min, has a volume of about 4,500 L, costs about 15*Z to purchase and build into the system, and costs about 12*X / h to operate. ...

Embodiment 3b

[0126] Example 3b. Continuous process with multiple finishers.

[0127] The method of Example 3 was followed, except that one finisher was configured to produce a polymer having a relative viscosity of about 60, and the other finishers were configured to produce a polymer with a relative viscosity of about 50.

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Abstract

The present invention relates to methods, systems, and apparatus for synthesizing a polyamide and including multiple back-ends. The method can be a method of synthesizing a polyamide, including evaporating a mixture comprising an oligomer formed from a linear dicarboxylic acid and a linear diamine sufficient to remove at least some water from the mixture, to provide a pre-finished mixture. The method can include splitting the pre-finished mixture into at least a first pre-finished mixture and a second pre-finished mixture. The method can include finishing the first pre-finished mixture in a first finisher, to provide a first finished mixture comprising a first polyamide. The method can include finishing the second pre-finished mixture in a second finisher, to provide a second finished mixture comprising a second polyamide.

Description

[0001] This application is a divisional application with the filing date of April 10, 2014, the application number being 201410143068.5 and the title of the invention being "polyamide synthesis including multiple back ends". [0002] Cross references to related applications [0003] This application claims the priority right of US Provisional Patent Application No. 61 / 818,169 filed on May 1, 2013, the disclosure of which is incorporated herein by reference in its entirety. Technical field [0004] The present invention relates to a method, system, and apparatus for synthesizing polyamide, and more specifically, to a method, system, and apparatus for synthesizing polyamide including multiple back ends. Background technique [0005] Polyamides have useful properties such as extremely high durability and strength, which allows them to be used in a variety of environments. Polyamides such as nylon, aramid, and sodium poly(aspartate) are commonly used in, for example, carpets, airbags, me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/28B01D3/00
CPCC08G69/28
Inventor 查尔斯·R·克尔曼托马斯·A·米茨卡约翰·P·普安萨蒂加里·R·韦斯特
Owner INVISTA TEXTILES (U K) LTD
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