Aniline

Molecular Structure

Molecular Details

Molecular Formula	C₆H₅NH₂
Molecular Weight	93.13 g/mol
State	Liquid at standard conditions

Olefinverbund Integration

Chemistry & Engineering

Reaction Equation	Nitrobenzene + 3H₂ → Aniline + 2H₂O
Thermodynamics	Highly exothermic hydrogenation
Catalyst System	Copper on Silica or Palladium
Reactor Class	Gas phase fluidized bed or vapor phase fixed bed
Process Considerations	Heat recovery crucial.

Extraterrestrial Production Pattern

1. Benzene nitration → nitrobenzene
2. Catalytic hydrogenation with Cu or Ni catalyst
3. Operating at 200-300°C in gas phase
4. Alternative: ammonolysis of phenol

Applications

• MDI for polyurethanes
• Rubber processing chemicals
• Dyes and pigments
• Pharmaceuticals

Reaction Diagram

Overall Reaction: C6H5NO2 + 3H2 -> C6H5NH2 + 2H2O

Unit Operations

Process steps following chemical engineering unit operation principles:

Step	Operation	Description
1	Nitrobenzene Feed	Pump nitrobenzene to hydrogenation reactor
2	Catalytic Hydrogenation	Cu or Ni catalyst at 200-300°C, 1-5 bar
3	Heat Recovery	Cool reactor effluent against feed
4	Phase Separation	Separate aniline/water mixture
5	Distillation	Distill to >99.9% aniline
6	Storage	Store under nitrogen to prevent oxidation

S88 Batch Control Model

This module follows the ISA-88 (S88) batch control standard. Below is a simplified BatchML schema for educational purposes:

<?xml version="1.0" encoding="UTF-8"?>
<!-- ISA-88 Batch Control Model for Aniline -->
<!-- Educational schema - simplified for demonstration -->
<BatchML xmlns="http://www.wbf.org/xml/B2MML-V0600">
  
  <ProcessCell ID="ANILINE_PLANT_CELL">
    <Description>Process cell for Aniline production</Description>
    
    <Unit ID="ANILINE_PLANT">
      <Description>Main synthesis unit</Description>
      
      <!-- Equipment Modules -->
      <EquipmentModule ID="PUMP">
        <Description>Pump</Description>
      </EquipmentModule>
      <EquipmentModule ID="HYDROGENATOR">
        <Description>Hydrogenator</Description>
      </EquipmentModule>
      <EquipmentModule ID="EXCHANGER">
        <Description>Exchanger</Description>
      </EquipmentModule>
      <EquipmentModule ID="DECANTER">
        <Description>Decanter</Description>
      </EquipmentModule>
      <EquipmentModule ID="COLUMN">
        <Description>Column</Description>
      </EquipmentModule>
      <EquipmentModule ID="STORAGE_TANK">
        <Description>Storage Tank</Description>
      </EquipmentModule>
    </Unit>
  </ProcessCell>
  
  <MasterRecipe ID="ANILINE_PLANT_RECIPE">
    <Description>Master recipe for Aniline</Description>
    <ProductID>ANILINE</ProductID>
    
    <UnitProcedure ID="ANILINE_PLANT_UP">
      <Description>Unit procedure for synthesis</Description>
      
      <Operation ID="OP_01">
        <Description>Operation 1</Description>
        <Phase ID="FEED">
          <Description>Feed 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="HYDROGENATE">
          <Description>Hydrogenate 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="RECOVER_HEAT">
          <Description>Recover Heat 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="SEPARATE">
          <Description>Separate 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="DISTILL">
          <Description>Distill 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="STORE">
          <Description>Store 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>

**Key S88 Concepts:**
- **Process Cell**: The physical grouping containing all equipment for this process
- **Unit**: The major equipment that performs the synthesis
- **Equipment Modules**: Individual pieces of equipment (reactors, columns, etc.)
- **Unit Procedure**: The sequence of operations to produce the product
- **Phases**: The lowest level of procedural control (e.g., REACT, SEPARATE, PURIFY)

Key S88 Concepts:
• Process Cell: Physical grouping containing all equipment
• Unit: Major equipment performing synthesis
• Equipment Modules: Individual pieces (reactors, columns, etc.)
• Phases: Lowest level of procedural control (REACT, SEPARATE, etc.)

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This Synthesis Module is part of the 100chemicals Olefinverbund — an integrated chemical production network designed for extraterrestrial civilization on Moon and Mars.