Back to results
US 4,478,736 AGranted
Composition and process for the treatment of clay slimes
AssigneeMonier Resources, Inc.
InventorsCarl F. Raba, Jr., Robert L. Smith, Francis Y. Huang
Life of this patent
Estimating the term…
Abstract
A composition and method of preparing the composition for dewatering clay slimes comprised of treating the slimes with a fly ash coated with a silane coupling reagent to which is bonded a polyacrylamide flocculant.
Claims16
A composition for the dewatering of clay slimes comprised of:
- a. hydrated fly ash;
- b. a silane coupling reagent reacted with the hydrated fly ash;
- and
- c. an acrylamide momomer polymerized with the fly ash.
1 more element
A method of preparing a composition for the dewatering of clay slimes comprising the following steps:
- a. Hydrating a quantity of fly ash;
- b. Combining the hydrated fly ash with a room temperature silane solution in a ratio of approximately 1 gram of fly ash per 4 milliliters of 1% by volume silane solution to form a suspension;
- c. Maintaining an acidic pH;
- d. Stirring the suspension for approximately 40 minutes to couple the silane to the ash;
- e. Removing the silane coated ash;
- f. Combining the coated fly ash with acrylamide monomer, water and catalysts to initiate polymerization;
- g. Heating the mixture until the temperature of the reactants reaches 65.degree. C.;
- h. Providing a means for deoxygenating the mixture during reaction;
- i. Maintaining a pH of approximately 6;
- and
- j. Allowing the reaction to proceed to the desired degree of polymerization.
8 more elements
A method of preparing a composition for dewatering of clay slimes comprising the following steps:
- a. Charging fly ash and water into a reactor in a ratio of 40 grams of ash to 160 milliliters of water;
- b. Adjusting the pH to approximately 6;
- c. Adding from 80 to 120 microliters of triacetoxyvinylsilane;
- d. Stirring for 30 minutes;
- e. Adding 100 milliliters of water;
- f. Purging the contents of the reactor with nitrogen gas;
- g. Adding 17.5 grams of acrylamide, 0.126 grams of ammonium persulfate and 0.0315 grams of sodium sulfite;
- h. Heating the mixture to 65.degree. C.;
- and
- i. Allowing polymerization to proceed until maximum viscosity is obtained.
7 more elements
Dependencies are inferred from the claim text.