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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

    Green Solvents and Ionic Liquids

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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)

    Green Solvents and Ionic Liquids

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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

    Green Solvents and Ionic Liquids

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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 !

    Green Solvents and Ionic Liquids

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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 ?

    Green Solvents and Ionic Liquids

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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.

    Green Solvents and Ionic Liquids

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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!

    Green Solvents and Ionic Liquids

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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

    Green Solvents and Ionic Liquids

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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

    Green Solvents and Ionic Liquids

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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

    Green Solvents and Ionic Liquids

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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

    Green Solvents and Ionic Liquids

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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

    Green Solvents and Ionic Liquids

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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

    Green Solvents and Ionic Liquids

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    Acknowledgements

    Whirlpool

    Rhodia

    (Johnson) Diversey

    Ecolab

    Dow Chemical

    Invista

    Green Solvents and Ionic Liquids


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