Toluene

C₇H₈ (C₆H₅CH₃) · 92.14 g/mol

C₇H₈ (C₆H₅CH₃)

Solvent and precursor to TNT, polyurethanes, and other chemicals

Molecular Weight

92.14 g/mol

State

Liquid

Catalyst

Zeolite Y or ZSM-5

Reactor

Liquid phase or vapor ph

Toluene molecular structure — 2D structure

Olefinverbund Integration

Inputs

Benzene, Methanol

→

Product

Toluene

→

Outputs

Toluene Diisocyanate, Benzene, Xylene, TNT

Chemistry & Engineering

Reaction	`C₆H₆ + CH₃OH → C₆H₅CH₃ + H₂O (Alkylation)`
Thermodynamics	Exothermic alkylation
Catalyst	Zeolite Y or ZSM-5
Reactor class	Liquid phase or vapor phase alkylation reactor
Note	Often produced in equilibrium with Benzene and Xylenes (BTX) in converting methanol/naphtha.

Applications

Solvent for paints and coatings
TDI (toluene diisocyanate) for polyurethanes
Benzoic acid production
Xylene production via disproportionation

Extraterrestrial Production Pattern

Catalytic reforming of naphtha-range FT products
Separation by extractive distillation
Alternative: Alkylation of benzene with methanol
Hydrodealkylation can convert toluene back to benzene

Reaction Diagram

Naphtha reforming -> C6H5CH3 (from aromatics)

Unit Operations

Process steps following chemical engineering unit operation principles

#	Operation	Description
1	Naphtha Hydrotreating	Remove S, N from naphtha
2	Catalytic Reforming	Pt/Re catalyst at 490-530°C
3	Aromatics Extraction	Sulfolane or Morpholine extraction
4	Toluene Column	Distill to separate toluene from benzene/xylenes
5	Clay Treatment	Remove olefins if needed
6	Storage	Store in floating-roof tanks

S88 Batch Control Model

ISA-88 BatchML schema — simplified for educational purposes

<?xml version="1.0" encoding="UTF-8"?>
<!-- ISA-88 Batch Control Model for Toluene -->
<!-- Educational schema - simplified for demonstration -->
<BatchML xmlns="http://www.wbf.org/xml/B2MML-V0600">
  
  <ProcessCell ID="TOLUENE_EXTRACTION_CELL">
    <Description>Process cell for Toluene production</Description>
    
    <Unit ID="TOLUENE_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="STORAGE">
        <Description>Storage</Description>
      </EquipmentModule>
    </Unit>
  </ProcessCell>
  
  <MasterRecipe ID="TOLUENE_EXTRACTION_RECIPE">
    <Description>Master recipe for Toluene</Description>
    <ProductID>TOLUENE</ProductID>
    
    <UnitProcedure ID="TOLUENE_EXTRACTION_UP">
      <Description>Unit procedure for synthesis</Description>
      
      <Operation ID="OP_01">
        <Description>Operation 1</Description>
        <Phase ID="HYDROTREAT">
          <Description>Hydrotreat 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="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_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>

Process CellPhysical grouping of all production equipment

UnitMajor equipment performing the synthesis

Equipment ModulesIndividual devices: reactors, columns, absorbers

PhasesLowest control level: REACT, SEPARATE, PURIFY

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