Производство нейлона 6,6 поликонденсацией

Первое коммерчески успешное синтетическое волокно

Materials Science & Polymers Global Industrial Scale $26 billion

Обзор

Nylon 6,6 is produced by the polycondensation of hexamethylenediamine and adipic acid, forming one of the most important engineering thermoplastics and synthetic fibers. Invented by Wallace Carothers at DuPont in 1935, nylon was the first fully synthetic fiber and revolutionized the textile industry. Beyond fibers, nylon 6,6 is used for automotive parts, electrical connectors, cable ties, and industrial components due to its excellent mechanical properties and chemical resistance.

Химический процесс

Hexamethylenediamine and adipic acid are combined in equimolar ratio to form nylon salt (AH salt), which is dissolved in water. The solution is heated under pressure (18 bar) to 220 degrees C, then pressure is released to drive off steam while temperature is raised to 280 degrees C. The melt is extruded, quenched, and cut into chips or directly spun into fiber.

nH2N(CH2)6NH2 + nHOOC(CH2)4COOH -> -[NH(CH2)6NH-CO(CH2)4CO]n- + (2n-1)H2O (step-growth polycondensation)

Сырьё

  • Hexamethylenediamine (H2N(CH2)6NH2) — Hydrogenation of adiponitrile (Diamine monomer)
  • Adipic acid (HOOC(CH2)4COOH) — Oxidation of cyclohexane with nitric acid (Diacid monomer)

Конечные продукты

  • Nylon 6,6 resin/fiber — Textiles, carpets, automotive parts, electrical connectors (Tm = 265 degrees C, excellent abrasion resistance)
<path stroke-linecap="round" stroke-linejoin="round" d="M12 9v3.75m-9.303 3.376c-.866 1.5.217 3.374 1.948 3.374h14.71c1.73 0 2.813-1.874 1.948-3.374L13.949 3.378c-.866-1.5-3.032-1.5-3.898 0L2.697 16.126zM12 15.75h.007v.008H12v-.008z" />

Environmental Impact

Adipic acid production is a significant source of N2O, a greenhouse gas 298 times more potent than CO2. Catalytic N2O abatement is now standard at adipic acid plants, reducing emissions by over 90%. Nylon 6,6 is recyclable by depolymerization back to monomers, though this is not yet widely practiced.

Соображения безопасности

Последние инновации

Bio-based adipic acid from renewable feedstocks (muconic acid route from glucose) is in commercial development.
Chemical recycling of nylon 6,6 back to monomers by depolymerization enables closed-loop production.

Масштаб производства

4000000

тонн/год

$26 billion

Рыночная стоимость

Больше в Materials Science & Polymers

Вулканизация каучука серным сшиванием

Global Industrial Scale

Производство волокна Kevlar (поли-п-фенилентерефталамид)

Commercial Production

Производство силикона (ПДМС) прямым процессом

Global Industrial Scale

Производство стеклопластиковых композитов

Global Industrial Scale

Производство углеродного волокна из полиакрилонитрила

Commercial Production

Производство эпоксидной смолы из бисфенола A

Global Industrial Scale

Синтез полиэтилена катализом по Циглеру–Натта

Global Industrial Scale

Frequently Asked Questions

What industry uses Производство нейлона 6,6 поликонденсацией?
Производство нейлона 6,6 поликонденсацией is used in the materials science & polymers sector at global industrial scale scale.
What process is involved in Производство нейлона 6,6 поликонденсацией?
Hexamethylenediamine and adipic acid are combined in equimolar ratio to form nylon salt (AH salt), which is dissolved in water. The solution is heated under pressure (18 bar) to 220 degrees C, then pressure is released to drive off steam while temperature is raised to 280 degrees C. The melt is extr
What is the economic significance of Производство нейлона 6,6 поликонденсацией?
Производство нейлона 6,6 поликонденсацией has a market value of $26 billion and annual production of 4,000,000 tons.
What is the environmental impact of Производство нейлона 6,6 поликонденсацией?
Adipic acid production is a significant source of N2O, a greenhouse gas 298 times more potent than CO2. Catalytic N2O abatement is now standard at adipic acid plants, reducing emissions by over 90%. Nylon 6,6 is recyclable by depolymerization back to monomers, though this is not yet widely practiced
What raw materials are used in Производство нейлона 6,6 поликонденсацией?
The main raw materials include: Hexamethylenediamine (H2N(CH2)6NH2), Adipic acid (HOOC(CH2)4COOH).