“The interaction between sulfur and the π orbitals of the C=N links is far greater than anything which occurs with oxygen or nitrogen substituents.”

“organic sulfur compounds” ,page 54

Sulfree™ Basic Molecule

About Sul-Free™Sul-Free™ represents a new imine complex that

offers significant advantages in treatment. It specifically targets acid gases including hydrogen sulfide, organo-sulfur compounds and mercaptans. The Sul-Free™ molecule has demonstrated much higher capacity than current science.

In recent hydrogen sulfide gas scrubbing trials, Sul-Free™ captured 20 times more H2S than the standard triazine product on a w/w basis.

Sul-Free™ has also shown capacity to scrub organic compounds such as benzene.

TOXICITY Sulfree ™ is synthesized from ingredients which are

used in food and food adjutants. Found in 21 CFR 182.60, 176.200,178.3400

Aquatic toxicity is very low, LC-50/96 for rainbow trout is 270 ppm. ( as WS-1500 concentrate ) At use levels, toxicity is extremely low.

This chemistry at use concentrations does not harm bacteria in the system. Sul-Free ™ is non-corrosive, easy to handle and apply, safe to use.

CorrosivitySul-Free™ solutions are isotonic with the pH of

concrete. It is not corrosive to wastewater piping systems. As it removes the hydrogen sulfide the corrosive environment to the system infrastructure is abated.

In well-bore and pipe applications corrosion is reduced due to acid gas capture. The Sul-Free™ molecule due to its structure may demonstrate anti-corrosive properties.

In handling Sul-Free™ there is no need for special chemical resistant pumps, tanks or plumbing.

BiodegradationSulfree™ biodegrades under anaerobic conditions

to methane, carbon dioxide and water. This leaves virtually no solids, no salts which produce EC ( electrical conductivity ), no nitrates.

Sulfree™ does not generate Oxides of Nitrogen ( Nox) in its use or biodegradation.

Carbon Monoxide ( CO ), Particulate Matter (PM2.5), Particulate Matter ( PM10) are not generated by this technology.

Mass balance of Sul-Free™ / Hydrogen Sulfide Biodegradation

Sul-Free™ + Hydrogen Sulfide 7 CO2 + 2 CH4 + 1 NH3 + 6H20 + 1 S

For wastewater treated with Sul-Free™ at 3 gallons of Sul-Free™WS 1500 per million gallons of wastewater, the mass balance of constituents prior to treatment would be 2.3 lbs Carbon Dioxide, 1.69 lbs of Methane, 0.9 lbs of Ammonia, 5.7 lbs of water and 1.69 lbs of Sulfur.

Under aerobic conditions, the Sul-Free™ molecule can catalytically regenerate which allows it to be a net consumer of ammonia.

Electrophilic Addition

Imine/Enamine Tautomerism

Anaerobic ElectrophilicAromatic Substitution

Aerobic Oxidation

Hydrogen SulfideSulfree™ Enamine

Sulfree™ Basic Molecule

Sulfur Water

Sulfree™ Catalytic Electrophilic Substitution

Aldehyde Oxidase

Benzoic Acid

Carbon Dioxide Methane

Anaerobic Degradation

Sulfree™ Basic Molecule

Treatment Chemical Removal rate as Lbs/Lb

H2SRemoval Rate for Ethyl

MercaptanEstimated cost per lb of Hydrogen

Sulfide

Sodium Hypochlorite6.56 lbs/lb Hydrogen Sulfide 9.3 lbs/lb ethyl mercaptan

Bleach solution 12%54.65 lbs/lb Hydrogen Sulfide 77.5 lbs/lb ethyl mercaptan 5.46 / lb Hydrogen Sulfide

Chlorine (gas)6.26 lbs/lb Hydrogen Sulfide 8.88 lbs/lb ethyl mercaptan 2.37 / lb Hydrogen Sulfide

Potassium Permanganate9.28 lbs/lb Hydrogen Sulfide 13.1 lbs/lb ethyl mercaptan 27.00 / lb Hydrogen Sulfide

Ozone 4.23 lbs/lb Hydrogen Sulfide 6 lbs/lb ethyl mercaptan

Sodium Hydroxide1.35 lbs/lb Hydrogen Sulfide unknown

Sodium Hydroxide 50% 2.70 lbs/lb Hydrogen Sulfide unknown

2.36 / lb Hydrogen Sulfide(60% loading)

Ferrous Chloride/H202 10 lbs/lb Hydrogen Sulfide 1.87 / lb Hydrogen Sulfidesolution ( Liquid #/#) 2.4 lbs H202/lb H2SFerric Chloride/H2O2 29 lbs/lb Hydrogen Sulfide 5.80 / lb Hydrogen Sulfidesolution (Liquid #/#) 12.4 lbs/lb 2.33 / lb Hysrogen Sulfide

Sulfree WS-15002.0 lbs/lb Hydrogen Sulfide 4.0 lbs/lb ethyl mercaptan 2.10 / lb Hydrogen Sulfide

Sulfree WS-15600.5 lbs/lb Hydrogen Sulfide 1.0 lbs/lb ethyl mercaptan 2.00 / lb Hydrogen Sulfide

Anaerobic Scrubbing of Hydrogen Sulfide

WWW.SULFREE.NET

Guard Products 980 77th Ave, Oakland, California 94621

800-369-8056