Nitrobenzene

Molecular Structure

Molecular Details

Molecular Formula	C₆H₅NO₂
Molecular Weight	123.11 g/mol
State	Liquid at standard conditions

Olefinverbund Integration

Chemistry & Engineering

Reaction Equation	Nitration with mixed acid (HNO₃/H₂SO₄)
Thermodynamics	Exothermic
Catalyst System	Sulfuric acid (acts as dehydrating agent)
Reactor Class	Continuous Stirred Tank Reactor cascade
Process Considerations	Requires concentration of spent sulfuric acid.

Extraterrestrial Production Pattern

1. Benzene + HNO₃ → nitrobenzene + H₂O
2. Mixed acid (HNO₃ + H₂SO₄) at 50-55°C
3. Continuous adiabatic nitration process
4. Washing and distillation

Applications

• Aniline production (hydrogenation)
• Solvent for cellulose ethers
• Shoe polish and floor wax

Reaction Diagram

Overall Reaction: C6H6 + HNO3 -> C6H5NO2 + H2O

Unit Operations

Process steps following chemical engineering unit operation principles:

Step	Operation	Description
1	Mixed Acid Preparation	Prepare HNO₃/H₂SO₄ mixture
2	Nitration	React benzene at 50-90°C with cooling
3	Phase Separation	Separate nitrobenzene from spent acid
4	Washing	Wash with water and dilute NaOH
5	Drying	Azeotropic or vacuum drying
6	Storage	Store in steel tanks

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 Nitrobenzene -->
<!-- Educational schema - simplified for demonstration -->
<BatchML xmlns="http://www.wbf.org/xml/B2MML-V0600">
  
  <ProcessCell ID="NITROBENZENE_PLANT_CELL">
    <Description>Process cell for Nitrobenzene production</Description>
    
    <Unit ID="NITROBENZENE_PLANT">
      <Description>Main synthesis unit</Description>
      
      <!-- Equipment Modules -->
      <EquipmentModule ID="ACID_MIXER">
        <Description>Acid Mixer</Description>
      </EquipmentModule>
      <EquipmentModule ID="NITRATOR">
        <Description>Nitrator</Description>
      </EquipmentModule>
      <EquipmentModule ID="SEPARATOR">
        <Description>Separator</Description>
      </EquipmentModule>
      <EquipmentModule ID="WASH_COLUMN">
        <Description>Wash Column</Description>
      </EquipmentModule>
      <EquipmentModule ID="DRYER">
        <Description>Dryer</Description>
      </EquipmentModule>
      <EquipmentModule ID="STORAGE">
        <Description>Storage</Description>
      </EquipmentModule>
    </Unit>
  </ProcessCell>
  
  <MasterRecipe ID="NITROBENZENE_PLANT_RECIPE">
    <Description>Master recipe for Nitrobenzene</Description>
    <ProductID>NITROBENZENE</ProductID>
    
    <UnitProcedure ID="NITROBENZENE_PLANT_UP">
      <Description>Unit procedure for synthesis</Description>
      
      <Operation ID="OP_01">
        <Description>Operation 1</Description>
        <Phase ID="PREP_ACID">
          <Description>Prep Acid 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="NITRATE">
          <Description>Nitrate 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="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_04">
        <Description>Operation 4</Description>
        <Phase ID="WASH">
          <Description>Wash 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="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_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.)

---

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