Synthetic Rubber Sbr

Molecular Structure

Molecular Details

Molecular Formula	Copolymer of C₈H₈ and C₄H₆
Molecular Weight	Variable (polymer)
State	Solid at standard conditions

Olefinverbund Integration

Chemistry & Engineering

Reaction Equation	Emulsion Polymerization
Thermodynamics	Exothermic
Catalyst System	Peroxide radical initiator
Reactor Class	Stirred tank train
Process Considerations	SBR 1500 series (Cold rubber) is standard.

Extraterrestrial Production Pattern

1. Emulsion or solution polymerization
2. Styrene:butadiene ratio typically 25:75
3. Radical initiators at 5-50°C
4. Coagulation, washing, and drying

Applications

• Tire treads and sidewalls
• Conveyor belts
• Shoe soles
• Mechanical rubber goods

Reaction Diagram

Overall Reaction: n C4H6 + m C8H8 -> [-CH2-CH=CH-CH2-]n[-CH2-CH(C6H5)-]m

Unit Operations

Process steps following chemical engineering unit operation principles:

Step	Operation	Description
1	Monomer Preparation	Purify butadiene and styrene
2	Emulsion Polymerization	Soap/water emulsion at 5-50°C
3	Shortstopping	Add shortstop to halt reaction at 60% conversion
4	Monomer Recovery	Steam strip unreacted monomers
5	Coagulation	Salt/acid coagulation of latex
6	Drying	Dry crumb to bales

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 Synthetic Rubber Sbr -->
<!-- Educational schema - simplified for demonstration -->
<BatchML xmlns="http://www.wbf.org/xml/B2MML-V0600">
  
  <ProcessCell ID="SBR_PLANT_CELL">
    <Description>Process cell for Synthetic Rubber Sbr production</Description>
    
    <Unit ID="SBR_PLANT">
      <Description>Main synthesis unit</Description>
      
      <!-- Equipment Modules -->
      <EquipmentModule ID="PURIFIER">
        <Description>Purifier</Description>
      </EquipmentModule>
      <EquipmentModule ID="REACTOR">
        <Description>Reactor</Description>
      </EquipmentModule>
      <EquipmentModule ID="SHORTSTOP_SYSTEM">
        <Description>Shortstop System</Description>
      </EquipmentModule>
      <EquipmentModule ID="STRIPPER">
        <Description>Stripper</Description>
      </EquipmentModule>
      <EquipmentModule ID="COAGULATOR">
        <Description>Coagulator</Description>
      </EquipmentModule>
      <EquipmentModule ID="DRYER">
        <Description>Dryer</Description>
      </EquipmentModule>
    </Unit>
  </ProcessCell>
  
  <MasterRecipe ID="SBR_PLANT_RECIPE">
    <Description>Master recipe for Synthetic Rubber Sbr</Description>
    <ProductID>SYNTHETIC_RUBBER_SBR</ProductID>
    
    <UnitProcedure ID="SBR_PLANT_UP">
      <Description>Unit procedure for synthesis</Description>
      
      <Operation ID="OP_01">
        <Description>Operation 1</Description>
        <Phase ID="PREP_MONOMER">
          <Description>Prep Monomer 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="POLYMERIZE">
          <Description>Polymerize 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="SHORTSTOP">
          <Description>Shortstop 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="STRIP">
          <Description>Strip 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="COAGULATE">
          <Description>Coagulate 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="DRY">
          <Description>Dry 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.