lean perspective of process intensification · 2017-10-30 · process intensification: •mass and...
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Lean perspective of Process
Intensification
SANDIP BOSE - SUN PHARMACEUTICALS INDIA LTD
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INNOVATION BECOMES REALITY
Manufacturing Operations Intensification A new approach
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• The pharmaceutical industry’s main goal is to extend and enhance human life while complying with various control of high cost commercial operation , Quality regulations ,pollution prevention and safety regulations
• API (Active Pharmaceutical Ingredient)
• The compound within the pill or solution that treats the disease
• Energy usage is between 50-300 MJ/kg API
• Solvent usage is around 300 kg/kg API
The Goal
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Lean Manufacturing Definition
Lean has been defined in many different ways.
“A systematic approach to identifying and eliminating waste(non-value-added activities) through continuous improvement by flowing the product at the pull of the customer in pursuit of perfection.”
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Muda (Waste)
Taiichi Ohno (1912-1990), the Toyota executive who was the most ferocious foe of waste human history has produced, identified the first seven types of muda in manufacturing system:
• Storage
• Transportation
• Waiting
• Motion
• Process
• Defects
• Over-production Muda is everywhere.
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• Batch-based processes
• Multi-step synthesis, transformations – intermediates
• Isolations (purification)
• Extensive use of multiple organic solvents and reagents – varying degrees of toxicity
• Limited health data on intermediates
lean manufacturing is a link to green engineering
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Lean &
Profit
Maximise profit by using minimum
resources
Green
Preserve & conserve natural resources
Green
Lean &
Profit
Lean & Green Solutions
Is Lean & Green results in same ?
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Green Engineering Opportunities
• Investigate process early in development
• Solvent substitution – more benign solvents
• Solvent reduction
• Novel processes for material reuse/recovery
• Reduction in process steps
• “Telescoping” to eliminate intermediate identity
• Continuous flow chemistry –waste & RFT
• Challenge - maintain drug purity and yield
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Green Engineering Needs (con’t)
• Metrics to measure and quantify improvements • What to measure, how to
quantify – more than just amount reduced
• Materials
• Mass intensity – amount of raw material needed to produce 1 kg of API
• Solvent intensity • Waste intensity • Water intensity
• Emissions
• Efficiency
• Energy
0
50
100
150
200
250
Lab Pilot Full
Production Scale
Mass In
ten
sit
y (
kg
/kg
AP
I)
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Value Stream Mapping for ABC
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VSM culminates in intensification
Pre identification - in batch • Between each step is hold time
• Same step is in cluster & cluster wastes
• Huge foot print and space barrier for plant
• High capital flow & higher maintenance
• High degree of back mixing
• Unwanted kinetic path favoured
• Low heat/mass transfer coefficient
• Process replication is empirical
• Yield , selectivity & safety compromised
Post identification – in continuous flow • No hold time on overall flow process as
reactions & unit operations can run continuously
• Each step is continuous no cluster operation , hence no waste
• Abnormally low footprint for same capacity target
• Initially high capital flow but very low maintenance
• Very high heat/mass transfer coefficients
• Process replication is real
• Yield , selectivity & safety by design
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waste minimization to waste elimination
• A continuous upward Journey
• A continuous flow is an undisrupted operation
• Steady state variability close to six sigma
Non Lean Batch
process
Lean batch process with
no NVA
Lean continuus flow as Zero NVA and QBD
Lean = Green Leanest approach is the flow process intensification
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Pharmaceutical Link • Process Intensification for the Chemical Industry
• What is specific to Pharma and Fine Chemistry Manufacturing?
• Manufacturing Operations Intensification
• Equipment selection to fit Manufacturing needs
• Conclusion
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Process Intensification for the Chemical Industry
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Switch to Continuous Process
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System engineering
Typical proven technologies • Advance flow reactor – microchannel ( corning
/Chemtrix)/Vapourtec
• Coflore technlogis – AM technology ACR/ATRs
• High shear flow reactor – Kinetichem
• Spinning Disk - SPINID
Typical equipment
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What is specific to Pharma and Fine Chemistry
Manufacturing
Adopt a lean culture with intensified technology solutions
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Pharma & Fine Chemicals Production
• A molecule is the output of a sequence made of 10 to 15 reactive and non-reactive steps (Complexity)
•The Unit Operations are mainly discontinuous (Batch)
•Multipurpose environment (Flexibility)
•Significant use of external providers to source raw materials as well as intermediates (Planning)
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Typical Pharma and Fine Chemistry Manufacturing?
• 99% operations are batch based
Batch variability is a main source of not achieving quality, production cycle & cost objectives
• Batch variability is the main barrier to deploy improvement methodologies like Lean Manufacturing and Six Sigma
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Quality
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Batch characteristics Organic synthesis Bio process
Each molecule or each micro-organism inside the batch vessel, is going through an history (TPC…) that can be significantly different from the others.
The repeatability of this history distribution is low from batch to batch.
Mass transfer Heat transfer Residence time distribution
Mass transfer Residence time distribution Temperature control
Develop chemistries that are less sensitive Develop equipment that are less variable
Use of solvents
Large amount of water used
Batch process variability
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Impact
• Batch process variability is responsible for: • 5% batch out of specifications (from 1 to 10%) • A cost of poor quality ( COPQ) in the order of 25% due to heavy quality controls and rework operations
• The inability most of the time to deploy Lean Manufacturing and get rid of the non value added operations
• Eventually lead to a poor first pass yield and a 25-40% cost of poor execution ( COPE)
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Manufacturing Operations Intensification
• Use of Advanced Manufacturing Technologies to produce manufacturing quality as
closed as possible to the final Quality delivered to the customer
- Continuous processing is part of it
• Manufacturing cost reduced by at least 25%
- Drastic increase of process capability - Elimination of the non value added rework operation
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What and How for pharma/chemical space
• Process Intensification for the Chemical Industry
• What is specific to Pharma and Fine Chemistry Manufacturing? • Manufacturing Operations Intensification • Equipment selection to fit Manufacturing needs
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Equipment selection: Heat Transfer
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Reactor / Reaction Fit Coefficient (Laurent Falk – ENSIC Nancy –
2010)
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Equipment Data Equipment Data
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Equipment impact (Chemistry kept constant)
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Reactor / Reaction Fit Coefficient (Laurent Falk –
ENSIC Nancy – 2010)
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Pharma & Fine Chemicals Production needs
• New Markets • Manufacturing of future molecules and potential new products
• New means higher performances than existing product performances
• This search will start early on in Research
• The challenge will be: • to invent such products, • to develop processes likely requiring more heat and mass transfer • to lower the entry Capex to minimize risks
Continuous reactors with higher mass and heat transfer capability, where the chemistry will continue to deliver higher performance
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Lean to Leaner by Continuous mode production
Manufacturing Operations Intensification:
• Significant increase in process capability (from 0,67 to 2)
• Avoidance of non value added rework operations for out of spec batch
• Drastic reduction of Quality control costs
Process Intensification:
• Mass and Heat transfer Optimization through characteristic dimensions reduction of the reactor (from meter to few millimeters)
• Increased product quality, yields, safety and decreased environmental impact
Production Facility Intensification
• Decrease of the footprint associated with production facility more compact, safer and cheaper
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Thank you