green solvent
Transcript of green solvent
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Green Solvents and Ionic Liquids:
Formulating for the Sustainable Future
Stanley S. Seelig, President/Owner Anthony O’Lenick, Managing Dir/Owner
Waterless Cleaning LLC
The 101st American Oil Chemist’s Society Annual & Expo May 18, 2010
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Waterless Cleaning LLC is100 % owned by Stan Seelig and Tony O’Lenick, with combined 60 years ofindustrial/consumer experience in cleaning/personal care
Mission StatementTo provide green/sustainable cleaning formulations using “green” solvents and
ionic liquid co-solvents for the replacement of wasteful, water-basedformulations and practices
Company Vision1. To license green and sustainable solvent-based cleaning formulations to
industry.2. To sell specialty ionic liquids that provide multiple benefits for a lower overall
cost into cleaning/other markets.
Green Solvents and Ionic Liquids
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What are “Green” Solvents ?(for our applications)
• Not halogenated, non-flammable (< 100 0C), non-hazardous, non-toxic
• Low /no VOC
• BP < 200 0C
• Biodegradable, stable, recyclable
• Low water solubility (< 5 wt% in solvent)
Best choices are solvents derived from bio-diesel, plant, natural products
Green Solvents and Ionic Liquids
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Choosing the Right Green Solvent(s)
Considerations
• Low pricing (< $ 1.50/lb)• World-wide availability, high volume potential
• Safe for people /environment
• Low /no VOC
• Compatibilities (w/equipment /materials to be cleaned)
• Equipment design
• Examples – dibasic esters, lactates, soy-based, Si-based, others
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What are Ionic Liquids (ILS) ?
Our ILs are:
• Combinations of cations(+) and anions(-)
• Liquids (viscous) at room temperature (RTILs)
• Cross between “Green” solvents and surfactants
• Hydrophobic, non-halogenated, no unusual cyclic structures,
conductive, simple
• Less expensive (ours < $1/gm, others > $100/gm)
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Applications for Ionic Liquids
• Solvents for pharmaceutical manufacturing
• Lubricants
• Extending the life of a lithium battery
• Dispersants in paints
• Solar energy (heat transfer and storage medium)• Electrochemical applications
• Cleaning and drying
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Primary Project
To develop a revolutionary change in the cleaning of fabrics bycombining dry cleaning concepts and water-based laundry systems into
a green and sustainable laundry system for institutional, industrial,commercial, and consumer laundry operations (without using water)
This is a Disruptive Technology !
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Laundry Cleaning TodayFollows the Energy Star program by minimizing:
• Water usages
• Energy consumption• Chemical usage
• Overall costs
But, we st i ll dump bi l lions o f gal lons of water down the drain every
day (con taining more detergent than con taminat ion ) !
Is this a Sustainable Process ?
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Is water, the Next Oil ?
• 3% of the Earth has drinkable water
• 1% of the 3% is accessible (rest is tied up in glaciers)
• 20% of the 1% is found in the Great Lakes Region (USA)
Ethical Challenge: We need to minimize our use of drinking water for
non-essential applications (i.e., laundry, dishwasher, toilets, wateringlawns, washing cars, etc). Our waste water streams are running onmaximum.
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Laundry Cleaning Tomorrow
Moving towards Waterless (Dry) Cleaning
• Cold water cleaning w/minimal water and energy
• Cleaning w/ozone (O3 injected water reduces heat), 2003
• Self cleaning laundry (coating repels water and dirt), 2004
• Cleaning w/polymer beads (90% water reduction), 2009
• Cleaning w/green solvents and ionic liquids (no free water), 2011
Equipment patents exist already for consumer solvent cleaning!
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Current Vision for Laundry Cleaning
• “Green” solvent + detergent package (ILs) will clean ~20-40 loads of
laundry (based on density limits) with rinsing
• Cleaning solvent would be filtered/recovered; waste residue sent for
disposal (after accumulation)
• Rinse solvent becomes cleaning solvent
• Add fresh (or recycled) solvent to rinse tank
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Current Vision for Laundry Cleaning(Institutional model)
CleaningSolvent
Distillation
RinseSolvent
Waste
1
2 -add detergent,then clothes
3
45 +spindryer
Fresh/recycledsolvent
After x washingsDistillate
Recycledsolvent
C A
B
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Actual Cost Comparisons at Local MarriottWater-based system (special thanks to Diversey, Inc)
Current System Cost Usage Cost/Month
Water Cost: $ 0.00075 147,000 $110.25
$/Liter L/Month
Energy Cost: $ 0.15 3200 $480.00
(natural gas) $/M3 M3 /Month
Chemical Cost: - - $ 500.00
Total Cost $1,090.25
(multiple machines) Water usage Load Processed/month
10:1 ratio 147,000 14,700 $ 0.07417
L/Month Kg Cost/Kg
Laundry
525 52.5 280.00
L/load Kg/load Loads/month
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Theoretical Cost Comparisons at Local MarriottSolvent density assumed 1.0
Solvent System Usage Solvent Solvent
$ 1.00/lb Kg/1st load Assumptions Kg/month Cost/1st Month
Solvent usage 525 147,000 $ 323,564.20
per load No solvent recovery
(100% solvent loss)
Solvent usage 525 99% solvent recovery 147.00 $ 323.56 plus Energy (E) to run still
per load or 0.525Kg loss Solvent recovery is based on drag out by the
for every load of laundry laundry load wt which is 99% per load
Solvent usage 525 81.8% solvent recovery 133.84 $ 294.60 plus E/20 to run still
per 20 loads or 9.56Kg loss Solvent recovery after 20 loads is 99X
%
or every 20 loads of laundry where x= 20 or 81.8% of the laundry load
Solvent usage 525 66.9% solvent recovery 121.66 $ 267.79 plus E/40 to run still
per 40 loads or 17.38Kg loss Solvent recovery after 40 loads is 99X
%
for every 40 loads of laundry where x= 40 or 66.9% of the laundry load
Solvent loss based on 1% of laundry weight
With solvent recovery, you begin next month with a full solvent charge
Initial charge cost: $ 1,155.59
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Theoretical Cost Comparisons at Local Marriott
Proposed Solvent System Cost Usage Cost/Month
Solvent Cost: 2.20 133.84 $ 294.60
(used) $/Liter L/Month per 20 loads
Energy Cost: $ 0.15 800 $120.00
(no drying) $/M3 M3 /Month assumed 25%
Chemical Cost: assumed same $ 500.00
Initial Solvent Cost 1st month $1,155.59
Total Monthly Cost 2nd month $ 914.60
Green Solvents and Ionic Liquids
vs$1,090.25(for water)
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Solvent Cleaning Benefits (1)
• Energy Eff ic ient – Energy to heat solvent < water; spin drying of
solvent>water; IL repels the solvent; no dryer expected!
• Water Effic ient – no water is used; solvent will clean 20-40 loads
depending on contamination and density
• Cleaning Eff ic iency – recycling solvent means less added chemicals;
fabrics will look/smell as if cleaned using water
• Environmental ly safer – solvents are low/non-VOCs, non-hazardous,
biodegradable, non-toxic
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Waterless Cleaning mus t
• Work with Potential Customers in institutional laundry
• Form a Strategic Alliance with key solvent manufacturers
• Form Partnerships with laundry equipment manufacturers
• Find Investors (angels, venture capitalists, banks, SBIR grants)
• Hire key personnel
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Acknowledgements
Whirlpool
Rhodia
(Johnson) Diversey
Ecolab
Dow Chemical
Invista
Green Solvents and Ionic Liquids