Methyl Methacrylate

CH₂=C(CH₃)COOCH₃ · 100.12 g/mol

CH₂=C(CH₃)COOCH₃

Monomer for PMMA (acrylic glass, Plexiglas)

Molecular Weight

100.12 g/mol

State

Liquid

Catalyst

Sulfuric Acid

Reactor

Hydrolysis/Esterificatio

Methyl Methacrylate molecular structure — 2D structure

Olefinverbund Integration

Inputs

Acetone, Hydrogen Cyanide, Methanol

→

Product

Methyl Methacrylate

→

Outputs

PMMA

Chemistry & Engineering

Reaction	`Acetone Cyanohydrin Route (ACH)`
Thermodynamics	Exothermic steps
Catalyst	Sulfuric Acid
Reactor class	Hydrolysis/Esterification train
Note	Newer C2-based routes exist to avoid HCN.

Applications

PMMA sheets and moldings (Plexiglas)
Coatings and adhesives
Dental and medical materials
Optical components

Extraterrestrial Production Pattern

Acetone + HCN → acetone cyanohydrin
Hydrolysis and esterification with methanol
Alternative: ethylene + CO₂ based routes emerging
Distillation with inhibitor stabilization

Reaction Diagram

CH3OH + HCN + CH3COCH3 -> CH2=C(CH3)COOCH3 + H2O + NH3

Unit Operations

Process steps following chemical engineering unit operation principles

#	Operation	Description
1	Acetone Cyanohydrin	React acetone with HCN at 30°C
2	Hydrolysis/Esterification	H₂SO₄ catalyzed with methanol
3	Cracking	Thermal cracking to release MMA
4	Quenching	Cool and condense MMA vapor
5	Purification	Distill to >99.9% MMA with inhibitor
6	Stabilization	Add MEHQ for storage stability

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 Methyl Methacrylate -->
<!-- Educational schema - simplified for demonstration -->
<BatchML xmlns="http://www.wbf.org/xml/B2MML-V0600">
  
  <ProcessCell ID="MMA_ACH_PLANT_CELL">
    <Description>Process cell for Methyl Methacrylate production</Description>
    
    <Unit ID="MMA_ACH_PLANT">
      <Description>Main synthesis unit</Description>
      
      <!-- Equipment Modules -->
      <EquipmentModule ID="CYANOHYDRIN_REACTOR">
        <Description>Cyanohydrin Reactor</Description>
      </EquipmentModule>
      <EquipmentModule ID="HYDROLYSIS_REACTOR">
        <Description>Hydrolysis Reactor</Description>
      </EquipmentModule>
      <EquipmentModule ID="CRACKER">
        <Description>Cracker</Description>
      </EquipmentModule>
      <EquipmentModule ID="QUENCH_COLUMN">
        <Description>Quench Column</Description>
      </EquipmentModule>
      <EquipmentModule ID="COLUMN">
        <Description>Column</Description>
      </EquipmentModule>
      <EquipmentModule ID="INHIBITOR_SYSTEM">
        <Description>Inhibitor System</Description>
      </EquipmentModule>
    </Unit>
  </ProcessCell>
  
  <MasterRecipe ID="MMA_ACH_PLANT_RECIPE">
    <Description>Master recipe for Methyl Methacrylate</Description>
    <ProductID>METHYL_METHACRYLATE</ProductID>
    
    <UnitProcedure ID="MMA_ACH_PLANT_UP">
      <Description>Unit procedure for synthesis</Description>
      
      <Operation ID="OP_01">
        <Description>Operation 1</Description>
        <Phase ID="CYANOHYDRIN">
          <Description>Cyanohydrin 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="HYDROLYZE">
          <Description>Hydrolyze 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="CRACK">
          <Description>Crack 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="QUENCH">
          <Description>Quench 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="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_06">
        <Description>Operation 6</Description>
        <Phase ID="STABILIZE">
          <Description>Stabilize 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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