Patent Number: 047818603
Section: description

By way of example, different liquid hazardous waste materials were treated in laboratory equivalents of the following: EXAMPLE I To 45 gallons of pure ethylene glycol was added pounds of attapulgite. The mixture was stirred at about 1000 rpm for about 5 minutes resulting in a thick, stiff, unpourable composition. The same result was achieved substituting sepiolite as the solidifying agent. By way of comparison, 350 pounds of sodium montmorillonite was required to solidify 25 gallons of the ethylene glycol to substantially the same solid consistency. EXAMPLE II A 40 gallon sample of a 20% aqueous sodium chloride solution was mixed with 190 pounds of sepiolite and stirred at 1000 rpm for 5 minutes to achieve a thick, stiff, unpourable composition. The same result was achieved substituting attapulgite for the sepiolite. By comparison, 300 pounds of sodium montmorillonite was required to solidify 30 gallons of the 20% sodium chloride solution. EXAMPLE III Forty-five gallons of an 8% aqueous sodium chloride solution was mixed with 225 pounds attapulgite and stirred at 1000 rpm for 5 minutes to achieve a stiff, substantially solidified material. To another 45 gallon sample of the aqueous 8% sodium chloride solution was added a mixture of 120 pounds attapulgite and 60 pounds sodium montmorillonite with stirring at 1000 rpm to obtain a substantially solid composition of the same consistency. The tests were repeated substituting sepiolite for attapulgite with substantially the same results.