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Polyamide synthesis including multiple back-ends

A polyamide and post-condensation technology, which is applied in the field of synthetic polyamide, can solve the problems of limited size, and achieve the effects of avoiding capacity bottlenecks, high overall throughput, and economic cost

Inactive Publication Date: 2014-11-05
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

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Embodiment

[0081] The present invention may be better understood with reference to the following examples, provided by way of illustration. The invention is not limited to the examples given herein.

[0082] Throughout the examples, X represents the same cost. Throughout the examples, Z represents the same cost.

Embodiment 3a

[0121] Example 3a. Continuous process with multiple finishers.

[0122] The method described in Example 1a was followed, using a system comprising cells approximately three times the size and handling three times the flow rate, similar to Example 1c. However, instead of the single finisher of Example 1c, two finishers in parallel are used, with the flow from the flasher being split evenly between the finishers.

[0123] The salt pond delivers material to the evaporator at about 315 L / min, has a volume of about 12,000 L, costs about 3*Z to buy and build into the system, and costs about 3*X / h to run. The evaporator delivers material into the reactor at about 225 L / min, has a volume of about 12,000 L, costs about 9*Z to buy and build into the system, and costs about 12*X / h to run. The reactor delivers material to the flasher 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 run. The flasher del...

Embodiment 3b

[0125] Example 3b. Continuous process with multiple finishers.

[0126] The method of Example 3 was followed except that one finisher was configured to produce polymer having a relative viscosity of about 60 and the other finisher was configured to produce polymer having 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] Cross References to Related Applications [0002] This application claims the benefit of priority to US Provisional Patent Application No. 61 / 818,169, filed May 1, 2013, the disclosure of which is incorporated herein by reference in its entirety. technical field [0003] The present invention relates to methods, systems, and apparatus for synthesizing polyamides, and more particularly, to methods, systems, and apparatus for synthesizing polyamides that include multiple back ends. Background technique [0004] Polyamides have useful properties such as extreme durability and strength, which allow them to be used in a variety of environments. Polyamides such as nylon, aramid, and sodium poly(aspartate) are commonly used, for example, in carpets, air bags, machine parts, apparel, rope, and stockings. Nylon-6,6, a smooth thermoplastic, is also the most commonly used polyamide. The long molecular chain and dense structure of nylon-6,6 qualify it as an advanced nylon fiber...

Claims

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Application Information

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IPC IPC(8): C08G69/28
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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