Titanium Dioxide

TiO₂

White pigment and photocatalyst

Molecular Structure

Molecular Details

Molecular Formula	TiO₂
Molecular Weight	79.87 g/mol
State	Solid at standard conditions

Olefinverbund Integration

⬅️ Inputs (Starting Materials): Chlorine

➡️ Outputs (Products): Pigments

Chemistry & Engineering

Reaction Equation	`TiCl₄ + O₂ → TiO₂ + 2Cl₂ (Chloride process)`
Thermodynamics	Exothermic oxidation
Catalyst System	AlCl₃ promotor (rutile formation)
Reactor Class	Burner/Oxidizer at 1000°C+
Process Considerations	Cl₂ is recycled. High purity required for whiteness.

Extraterrestrial Production Pattern

Chloride process: ilmenite + Cl₂ + C → TiCl₄ → TiO₂
Sulfate process: ilmenite + H₂SO₄ → TiOSO₄ → TiO₂
High-temperature oxidation or hydrolysis
Surface treatment for specific applications

Applications

White pigment for paints and coatings
Plastics coloring
Sunscreen UV blocker
Photocatalysis and self-cleaning surfaces

Reaction Diagram

Overall Reaction: FeTiO3 + 2Cl2 -> TiCl4 + FeCl2; TiCl4 + O2 -> TiO2 + 2Cl2

Unit Operations

Process steps following chemical engineering unit operation principles:

Step	Operation	Description
1	Ilmenite Chlorination	React ore with Cl₂ and coke at 900°C
2	TiCl₄ Purification	Distill to remove impurities
3	Oxidation	Burn TiCl₄ in O₂ at 1200-1500°C
4	Chlorine Recovery	Recycle Cl₂ to chlorinator
5	Milling	Jet mill to 0.2-0.5 μm particles
6	Surface Treatment	Coat with Al₂O₃/SiO₂ for stability

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 Titanium Dioxide -->
<!-- Educational schema - simplified for demonstration -->
<BatchML xmlns="http://www.wbf.org/xml/B2MML-V0600">
  
  <ProcessCell ID="TIO2_CHLORIDE_PLANT_CELL">
    <Description>Process cell for Titanium Dioxide production</Description>
    
    <Unit ID="TIO2_CHLORIDE_PLANT">
      <Description>Main synthesis unit</Description>
      
      <!-- Equipment Modules -->
      <EquipmentModule ID="CHLORINATOR">
        <Description>Chlorinator</Description>
      </EquipmentModule>
      <EquipmentModule ID="DISTILLATION">
        <Description>Distillation</Description>
      </EquipmentModule>
      <EquipmentModule ID="OXIDIZER">
        <Description>Oxidizer</Description>
      </EquipmentModule>
      <EquipmentModule ID="RECYCLE_SYSTEM">
        <Description>Recycle System</Description>
      </EquipmentModule>
      <EquipmentModule ID="JET_MILL">
        <Description>Jet Mill</Description>
      </EquipmentModule>
      <EquipmentModule ID="COATER">
        <Description>Coater</Description>
      </EquipmentModule>
    </Unit>
  </ProcessCell>
  
  <MasterRecipe ID="TIO2_CHLORIDE_PLANT_RECIPE">
    <Description>Master recipe for Titanium Dioxide</Description>
    <ProductID>TITANIUM_DIOXIDE</ProductID>
    
    <UnitProcedure ID="TIO2_CHLORIDE_PLANT_UP">
      <Description>Unit procedure for synthesis</Description>
      
      <Operation ID="OP_01">
        <Description>Operation 1</Description>
        <Phase ID="CHLORINATE">
          <Description>Chlorinate 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="PURIFY_TICL4">
          <Description>Purify Ticl4 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="OXIDIZE">
          <Description>Oxidize 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="RECOVER_CL2">
          <Description>Recover Cl2 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="MILL">
          <Description>Mill 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="COAT">
          <Description>Coat 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.