Nylon 6

[NH(CH₂)₅CO]ₙ · Variable (polymer)

[NH(CH₂)₅CO]ₙ

Engineering polyamide for fibers and plastics

Molecular Weight

Variable (polymer)

State

Solid

Catalyst

Water (hydrolytic) or An

Reactor

VK tube (Vereinfacht Kon

Nylon 6 molecular structure — 2D structure

Olefinverbund Integration

Inputs

Caprolactam

→

Product

Nylon 6

→

Outputs

Fibers, Gears

Chemistry & Engineering

Reaction	`Ring opening polymerization`
Thermodynamics	Exothermic
Catalyst	Water (hydrolytic) or Anionic
Reactor class	VK tube (Vereinfacht Kontinuierlich)
Note	Equilibrium contains 10% monomer, requires extraction/washing.

Applications

Textile fibers (hosiery, carpets)
Engineering plastics
Tire cord
Films and packaging

Extraterrestrial Production Pattern

Caprolactam melting and water addition (catalyst)
Ring-opening polymerization at 250-270°C
Continuous or batch process
Chip cutting and extraction of residual monomer

Reaction Diagram

n C6H11NO -> [-NH(CH2)5CO-]n

Unit Operations

Process steps following chemical engineering unit operation principles

#	Operation	Description
1	Caprolactam Melting	Melt caprolactam at 70°C
2	Polymerization	Hydrolytic polymerization at 250-270°C
3	Extraction	Extract monomer/oligomer with hot water
4	Drying	Dry chips to <0.03% moisture
5	Solid-State Polymerization	Optionally increase MW in SSP
6	Spinning	Melt spin into fiber or extrude

S88 Batch Control Model

ISA-88 BatchML schema — simplified for educational purposes

<?xml version="1.0" encoding="UTF-8"?>
<!-- ISA-88 Batch Control Model for Nylon 6 -->
<!-- Educational schema - simplified for demonstration -->
<BatchML xmlns="http://www.wbf.org/xml/B2MML-V0600">
  
  <ProcessCell ID="NYLON6_PLANT_CELL">
    <Description>Process cell for Nylon 6 production</Description>
    
    <Unit ID="NYLON6_PLANT">
      <Description>Main synthesis unit</Description>
      
      <!-- Equipment Modules -->
      <EquipmentModule ID="MELTER">
        <Description>Melter</Description>
      </EquipmentModule>
      <EquipmentModule ID="AUTOCLAVE">
        <Description>Autoclave</Description>
      </EquipmentModule>
      <EquipmentModule ID="EXTRACTOR">
        <Description>Extractor</Description>
      </EquipmentModule>
      <EquipmentModule ID="DRYER">
        <Description>Dryer</Description>
      </EquipmentModule>
      <EquipmentModule ID="SSP_REACTOR">
        <Description>Ssp Reactor</Description>
      </EquipmentModule>
      <EquipmentModule ID="SPINNING">
        <Description>Spinning</Description>
      </EquipmentModule>
    </Unit>
  </ProcessCell>
  
  <MasterRecipe ID="NYLON6_PLANT_RECIPE">
    <Description>Master recipe for Nylon 6</Description>
    <ProductID>NYLON_6</ProductID>
    
    <UnitProcedure ID="NYLON6_PLANT_UP">
      <Description>Unit procedure for synthesis</Description>
      
      <Operation ID="OP_01">
        <Description>Operation 1</Description>
        <Phase ID="MELT">
          <Description>Melt phase</Description>
          <PhaseLogic>
            <Step ID="STEP_1"><Action>Initialize</Action></Step>
            <Step ID="STEP_2"><Action>Execute</Action></Step>
            <Step ID="STEP_3"><Action>Complete</Action></Step>
          </PhaseLogic>
        </Phase>
      </Operation>
      
      <Operation ID="OP_02">
        <Description>Operation 2</Description>
        <Phase ID="POLYMERIZE">
          <Description>Polymerize phase</Description>
          <PhaseLogic>
            <Step ID="STEP_1"><Action>Initialize</Action></Step>
            <Step ID="STEP_2"><Action>Execute</Action></Step>
            <Step ID="STEP_3"><Action>Complete</Action></Step>
          </PhaseLogic>
        </Phase>
      </Operation>
      
      <Operation ID="OP_03">
        <Description>Operation 3</Description>
        <Phase ID="EXTRACT">
          <Description>Extract phase</Description>
          <PhaseLogic>
            <Step ID="STEP_1"><Action>Initialize</Action></Step>
            <Step ID="STEP_2"><Action>Execute</Action></Step>
            <Step ID="STEP_3"><Action>Complete</Action></Step>
          </PhaseLogic>
        </Phase>
      </Operation>
      
      <Operation ID="OP_04">
        <Description>Operation 4</Description>
        <Phase ID="DRY">
          <Description>Dry phase</Description>
          <PhaseLogic>
            <Step ID="STEP_1"><Action>Initialize</Action></Step>
            <Step ID="STEP_2"><Action>Execute</Action></Step>
            <Step ID="STEP_3"><Action>Complete</Action></Step>
          </PhaseLogic>
        </Phase>
      </Operation>
      
      <Operation ID="OP_05">
        <Description>Operation 5</Description>
        <Phase ID="SSP">
          <Description>Ssp phase</Description>
          <PhaseLogic>
            <Step ID="STEP_1"><Action>Initialize</Action></Step>
            <Step ID="STEP_2"><Action>Execute</Action></Step>
            <Step ID="STEP_3"><Action>Complete</Action></Step>
          </PhaseLogic>
        </Phase>
      </Operation>
      
      <Operation ID="OP_06">
        <Description>Operation 6</Description>
        <Phase ID="SPIN">
          <Description>Spin phase</Description>
          <PhaseLogic>
            <Step ID="STEP_1"><Action>Initialize</Action></Step>
            <Step ID="STEP_2"><Action>Execute</Action></Step>
            <Step ID="STEP_3"><Action>Complete</Action></Step>
          </PhaseLogic>
        </Phase>
      </Operation>
    </UnitProcedure>
  </MasterRecipe>
  
</BatchML>

Process CellPhysical grouping of all production equipment

UnitMajor equipment performing the synthesis

Equipment ModulesIndividual devices: reactors, columns, absorbers

PhasesLowest control level: REACT, SEPARATE, PURIFY

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