중축합에 의한 나일론 6,6 생산

최초로 상업적으로 성공한 합성 섬유

Materials Science & Polymers Global Industrial Scale $26 billion

개요

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.

화학 공정

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)

원자재

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

최종 제품

  • 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.

안전 고려사항

최근 혁신

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.

생산 규모

4000000

톤/년

$26 billion

시장 가치

더 보기: Materials Science & Polymers

폴리아크릴로나이트릴로부터 탄소 섬유 제조

Commercial Production

지글러-나타 촉매법에 의한 폴리에틸렌 합성

Global Industrial Scale

유리 섬유 복합재료 제조

Global Industrial Scale

황 가교결합에 의한 고무 가황

Global Industrial Scale

비스페놀 A로부터 에폭시 수지 생산

Global Industrial Scale

케블러(폴리-p-페닐렌 테레프탈아마이드) 섬유 생산

Commercial Production

직접법에 의한 실리콘(PDMS) 제조

Global Industrial Scale

Frequently Asked Questions

What industry uses 중축합에 의한 나일론 6,6 생산?
중축합에 의한 나일론 6,6 생산 is used in the materials science & polymers sector at global industrial scale scale.
What process is involved in 중축합에 의한 나일론 6,6 생산?
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 중축합에 의한 나일론 6,6 생산?
중축합에 의한 나일론 6,6 생산 has a market value of $26 billion and annual production of 4,000,000 tons.
What is the environmental impact of 중축합에 의한 나일론 6,6 생산?
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 중축합에 의한 나일론 6,6 생산?
The main raw materials include: Hexamethylenediamine (H2N(CH2)6NH2), Adipic acid (HOOC(CH2)4COOH).