ANSHU RAJ,Assignment3,Fgf

7/30/2019 ANSHU RAJ,Assignment3,Fgf

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ALTERNATIVE DRYCLEANING SOLVENTS

ANSHU RAJ(06)

DFT-IV


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1. Synthetic Hydrocarbons2. Cyclic Siloxanes

3. Glycol Ethers4. Synthetic Hydrocarbons with Fluorinated

Additives

5. Carbon Dioxide


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solvents are no longer used because of their toxicity(e.g., carbon tetrachloride and 1,1,1-trichloroethane)

because of their flammability (e.g., the petroleum

fraction known as white gasoline) are irritation of the skin, eyes and lungs, headache,

nausea, dizziness

repeated or prolonged skin contact can causedermatitis PCE can damage synthetic leather, plastic buttons,

sequins, and other types of trim


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Synthetic Hydrocarbons hydrocarbon solvents are synthetic paraffins with

higher flash points such as DF-2000, Hydroclene,Soltrol 130 or EcoSolv

synthetic petroleum solvents have virtually no odor have good oil-soluble soil removal, and their low

density promotes adequate removal of insoluble soils


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Synthetic Hydrocarbons (DF-2000)Compared to PCE


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Cyclic Siloxanes

containing over 95 percent decamethyl-cyclopentasiloxane

odorless, low-volatility fluids that are alsoused in cosmetics

not a volatile organic compound (VOC) because it is a cyclic completely methylatedsiloxane


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Cyclic Siloxanes (GreenEarth)Compared to PCE


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Glycol Ethers glycol ethers are VOCs but not HAPs are biodegradable have low acute toxicity retain more water than PCE and other alternative solvents,

giving them an advantage in effectively removing water soluble stains and soil

moisture-bearing spotters also rinse out easily do not affect prints or most colors and are safe for silks and

most other fabrics may affect acetate or blends causing them to potentially bleed, discolor and shrink beads on garments can lose coatings, and vinyl items can

stiffen


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Synthetic Hydrocarbons withFluorinated Additives

consists of an isoparaffinic hydrocarbon base,hydrofluoroethers, and less than 0.5%

perfluoroisobutylethers to reduce its flammability vapor pressure is lower than the other alternative

solvents , it dries quickly, thus reducing cycle times tothe same duration as with PCE


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Synthetic Hydrocarbons withFluorinated Additives (PureDry)


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Carbon Dioxide process are similar to the PCE process (detergent addition,

agitation, etc.), the equipment is much different because of the high pressure needed for liquid CO2

cycle times are slightly shorter than most PCE machines , fullcleaning cycle takes only 35 to 45 minutes

A CO2 dry cleaning machine has the following primarycomponents: washing chamber, CO2 storage tank, working tank,

distilling unit, compressor, pump , and filters.


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system is able to efficiently convert CO2 froma gas to a liquid, thereby permitting 98percent of the CO2 to be recycled.

A nominal amount (10 lbs) of CO2 gas is thenvented to the atmosphere


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THANK YOU

ANSHU RAJ,Assignment3,Fgf

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