Sweetener type filter powder
For Dry Cleaning Solvents
“Sweet-Flo”is specifically designed to remove free fatty acid from dry cleaning solvent. This is accomplished by a reaction known as chemi-sorption. Part of the reaction between “Sweet-Flo” and the free fatty acid is chemical and part of it is absorption. There is a physical attraction of the free fatty acid to the surface of the “Sweet-Flo”plus a chemical reaction.
“Sweet-Flo”solves the detergent loss problem while absolutely keeping the pressure buildup low. Free fatty acid will produce offensive odors on dry cleaned garments. This was especially true when true soaps were used. With the advent of synthetic detergents, the free fatty acid problem has decreased. However, the problem is by no means eliminated.
Dry cleaning removes free fatty acid from the garments and the fatty acid contamination remains in the solvent unless the solvent is treated by CONTINUOUS chemical treatment or continuous distillation. Free fatty acid can contribute up to 30% of the total non-volatile content; therefore, it is important to use a chemical treatment such as “Sweet-Flo”on the filter. Activated carbons will not effectively remove free fatty acid. Activated carbons remove color only with very slight traces of free fatty acid.
Extensive field-testing as well as laboratory tests has proven that “Sweet-Flo”effectively removes free fatty acid with very minimal detergent removal and with FAR LESS FILTER PRESSURE THEN ANY other known product on the market. Distillation does, of course, remove all fatty acid but also REMOVES ALL OF THE DETERGENTS. Removing all the detergents plus added energy cost is most expensive and increased energy cost of heat and water has caused the dry cleaning industry to take a second look at the frequency of distilling solvent.
Every indication points to continued increased costs of heat as well as water. In some parts of the country, water is, in fact, becoming too critical of an item for the dry cleaner to continue with frequent distillation. Chemical treatment is not meant to completely eliminate distillation. The still should be operated occasionally completely removing all fatty acid including the detergent.
“Sweet-Flo”is compatible with any percent of detergent and with petroleum or synthetic solvent. A good diatomaceous filter powder should be used such as John Mansville “Hi-Flo” or Davies “Klear Flow”. Follow pre-coat directions carefully. After pre-coating with “Sweet-Flo”or ‘Hi Flo’ the prescribed amount of activated carbon should be added while the filter pump is running to keep the solvent free from dye buildup. After the prescribed amount of activated carbon has been added, the“Sweet-Flo”is then added while the filter pump is running or “Sweet-Flo”may be added together with the activated carbon.
How to pre-coat filter
|Filter capacity gl. /hr||Approx. filter area Sq. Ft.||
“Kleen Flo” or “Hi Flo” Pounds
“Sweet Flo Pounds
4 ½ to 6
|2000||60||9 to 12||2 lbs|
|3000||90||14 to 18||3 lbs|
|5000||130||20 to 25||4 lbs|
|7000||200||40 to 54||6 lbs|
|12000||330||55 to 66||8 lbs|
Filter area varies slightly depending on manufacturing of filter. For filter sizes not shown, a good rule of thumb for pre-coating is 100lbs. Of diatoomacious filter powder per 100sq. ft. of filter area (approx. 4-5lbs. Per 1000 gallon per hour).
For general information, a 1lb. Coffee can holds approx. ½ pound of “Hi-Flo” or “Kleer-Flo”. A 1lb coffee can will hold approx. 3lbs. Of “Sweet-Flo” sweetener powder.