Benzene

Molecular Structure

Molecular Details

Molecular Formula	C₆H₆
Molecular Weight	78.11 g/mol
State	Liquid at standard conditions

Olefinverbund Integration

Chemistry & Engineering

Reaction Equation	Methanol-to-Aromatics (MTA) or Dehydrocycliztion of Alkanes
Thermodynamics	Aromatization is endothermic and equilibrium limited
Catalyst System	Ga-doped ZSM-5 zeolite enhances aromatization
Reactor Class	Fixed bed synthesis loop with continuous hydrogen removal
Process Considerations	Benzene is the entry point for the aromatic chain. Toxicity requires strict containment in habitat environments.

Extraterrestrial Production Pattern

1. Fischer-Tropsch synthesis to produce naphtha-range hydrocarbons
2. Catalytic reforming over Pt/Al₂O₃ catalyst
3. Solvent extraction (Sulfolane process)
4. Alternative: Methanol-to-aromatics over Ga-ZSM-5 zeolite

Applications

• Ethylbenzene and styrene production
• Cumene and phenol synthesis
• Cyclohexane for nylon
• Nitrobenzene and aniline

Reaction Diagram

Overall Reaction: Naphtha -> C6H6 + H2 (Reforming)

Unit Operations

Process steps following chemical engineering unit operation principles:

Step	Operation	Description
1	Feed Treatment	Remove sulfur and nitrogen from naphtha
2	Catalytic Reforming	Pt/Al₂O₃ catalyst at 500°C, 10-35 bar
3	Aromatics Extraction	Sulfolane or NMP extraction of BTX
4	Benzene Column	Distillation to separate benzene from toluene
5	Clay Treatment	Remove olefins and color bodies
6	Product Storage	Store under nitrogen blanket

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 Benzene -->
<!-- Educational schema - simplified for demonstration -->
<BatchML xmlns="http://www.wbf.org/xml/B2MML-V0600">
  
  <ProcessCell ID="BENZENE_EXTRACTION_CELL">
    <Description>Process cell for Benzene production</Description>
    
    <Unit ID="BENZENE_EXTRACTION">
      <Description>Main synthesis unit</Description>
      
      <!-- Equipment Modules -->
      <EquipmentModule ID="HYDROTREATER">
        <Description>Hydrotreater</Description>
      </EquipmentModule>
      <EquipmentModule ID="REFORMER">
        <Description>Reformer</Description>
      </EquipmentModule>
      <EquipmentModule ID="EXTRACTOR">
        <Description>Extractor</Description>
      </EquipmentModule>
      <EquipmentModule ID="COLUMN">
        <Description>Column</Description>
      </EquipmentModule>
      <EquipmentModule ID="CLAY_TREATER">
        <Description>Clay Treater</Description>
      </EquipmentModule>
      <EquipmentModule ID="TANK">
        <Description>Tank</Description>
      </EquipmentModule>
    </Unit>
  </ProcessCell>
  
  <MasterRecipe ID="BENZENE_EXTRACTION_RECIPE">
    <Description>Master recipe for Benzene</Description>
    <ProductID>BENZENE</ProductID>
    
    <UnitProcedure ID="BENZENE_EXTRACTION_UP">
      <Description>Unit procedure for synthesis</Description>
      
      <Operation ID="OP_01">
        <Description>Operation 1</Description>
        <Phase ID="TREAT">
          <Description>Treat 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="REFORM">
          <Description>Reform 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="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_05">
        <Description>Operation 5</Description>
        <Phase ID="POLISH">
          <Description>Polish 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.