Sodium Hypochlorite

Molecular Structure

Molecular Details

Molecular Formula	NaOCl
Molecular Weight	74.44 g/mol
State	Aqueous solution

Olefinverbund Integration

Chemistry & Engineering

Reaction Equation	Cl₂ + 2NaOH → NaOCl + NaCl + H₂O
Thermodynamics	Exothermic
Catalyst System	None
Reactor Class	Chlorinator
Process Considerations	Must be kept cool (<30C) to prevent decomposition.

Extraterrestrial Production Pattern

1. Cl₂ + 2NaOH → NaOCl + NaCl + H₂O
2. Reaction at low temperature (<25°C) to prevent chlorate formation
3. Continuous or batch process
4. Stabilization for storage

Applications

• Water disinfection
• Household bleach
• Surface sanitization
• Wastewater treatment

Reaction Diagram

Overall Reaction: Cl2 + 2NaOH -> NaOCl + NaCl + H2O

Unit Operations

Process steps following chemical engineering unit operation principles:

Step	Operation	Description
1	Caustic Preparation	Dilute NaOH to 20-25%
2	Chlorination	Absorb Cl₂ in caustic at <35°C
3	Cooling	Cool to maintain temperature
4	Filtration	Remove precipitated NaCl if needed
5	Concentration Adjustment	Adjust to 10-15% available chlorine
6	Stabilization	Add NaOH for storage 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 Sodium Hypochlorite -->
<!-- Educational schema - simplified for demonstration -->
<BatchML xmlns="http://www.wbf.org/xml/B2MML-V0600">
  
  <ProcessCell ID="BLEACH_PLANT_CELL">
    <Description>Process cell for Sodium Hypochlorite production</Description>
    
    <Unit ID="BLEACH_PLANT">
      <Description>Main synthesis unit</Description>
      
      <!-- Equipment Modules -->
      <EquipmentModule ID="DILUTION_TANK">
        <Description>Dilution Tank</Description>
      </EquipmentModule>
      <EquipmentModule ID="ABSORBER">
        <Description>Absorber</Description>
      </EquipmentModule>
      <EquipmentModule ID="COOLER">
        <Description>Cooler</Description>
      </EquipmentModule>
      <EquipmentModule ID="FILTER">
        <Description>Filter</Description>
      </EquipmentModule>
      <EquipmentModule ID="BLENDER">
        <Description>Blender</Description>
      </EquipmentModule>
      <EquipmentModule ID="STORAGE">
        <Description>Storage</Description>
      </EquipmentModule>
    </Unit>
  </ProcessCell>
  
  <MasterRecipe ID="BLEACH_PLANT_RECIPE">
    <Description>Master recipe for Sodium Hypochlorite</Description>
    <ProductID>SODIUM_HYPOCHLORITE</ProductID>
    
    <UnitProcedure ID="BLEACH_PLANT_UP">
      <Description>Unit procedure for synthesis</Description>
      
      <Operation ID="OP_01">
        <Description>Operation 1</Description>
        <Phase ID="PREP_CAUSTIC">
          <Description>Prep Caustic 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="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_03">
        <Description>Operation 3</Description>
        <Phase ID="COOL">
          <Description>Cool 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="FILTER">
          <Description>Filter 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="ADJUST">
          <Description>Adjust 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>

**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.