Phosgene

Molecular Structure

Molecular Details

Molecular Formula	COCl₂
Molecular Weight	98.92 g/mol
State	Gas at standard conditions

Olefinverbund Integration

Chemistry & Engineering

Reaction Equation	CO + Cl₂ → COCl₂
Thermodynamics	Exothermic
Catalyst System	Activated Carbon
Reactor Class	Tubular fixed bed
Process Considerations	Deadly. Produced and consumed in closed loop.

Extraterrestrial Production Pattern

1. CO + Cl₂ → COCl₂ (over activated carbon catalyst)
2. Operating at 50-150°C
3. Highly exothermic reaction
4. On-site production due to extreme toxicity

Applications

• Polycarbonate production
• Isocyanates (MDI, TDI) for polyurethanes
• Pharmaceutical intermediates
• Agricultural chemicals

Reaction Diagram

Overall Reaction: CO + Cl2 -> COCl2

Unit Operations

Process steps following chemical engineering unit operation principles:

Step	Operation	Description
1	CO/Cl₂ Feed	Dry and meter CO and Cl₂ gases
2	Catalytic Reaction	Activated carbon catalyst at 50-150°C
3	Condensation	Condense phosgene (bp 8°C)
4	Purification	Remove dissolved Cl₂ and CO
5	Storage	Store as liquid under pressure or use immediately
6	Destruction	Caustic destruction of off-spec material

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 Phosgene -->
<!-- Educational schema - simplified for demonstration -->
<BatchML xmlns="http://www.wbf.org/xml/B2MML-V0600">
  
  <ProcessCell ID="PHOSGENE_PLANT_CELL">
    <Description>Process cell for Phosgene production</Description>
    
    <Unit ID="PHOSGENE_PLANT">
      <Description>Main synthesis unit</Description>
      
      <!-- Equipment Modules -->
      <EquipmentModule ID="DRYERS">
        <Description>Dryers</Description>
      </EquipmentModule>
      <EquipmentModule ID="REACTOR">
        <Description>Reactor</Description>
      </EquipmentModule>
      <EquipmentModule ID="CONDENSER">
        <Description>Condenser</Description>
      </EquipmentModule>
      <EquipmentModule ID="SCRUBBER">
        <Description>Scrubber</Description>
      </EquipmentModule>
      <EquipmentModule ID="STORAGE">
        <Description>Storage</Description>
      </EquipmentModule>
      <EquipmentModule ID="CAUSTIC_SYSTEM">
        <Description>Caustic System</Description>
      </EquipmentModule>
    </Unit>
  </ProcessCell>
  
  <MasterRecipe ID="PHOSGENE_PLANT_RECIPE">
    <Description>Master recipe for Phosgene</Description>
    <ProductID>PHOSGENE</ProductID>
    
    <UnitProcedure ID="PHOSGENE_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="REACT">
          <Description>React 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="CONDENSE">
          <Description>Condense 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="PURIFY">
          <Description>Purify 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="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>
      
      <Operation ID="OP_06">
        <Description>Operation 6</Description>
        <Phase ID="DESTRUCT">
          <Description>Destruct 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.