Composition for solidification or semi-solidification of waste materials

• US 4,952,242 A
• Filed: 03/29/1988
• Issued: 08/28/1990
• Est. Priority Date: 03/29/1988
• Status: Expired due to Fees

• Current Assignee: Eugene F. Earp
• Original Assignee: Eugene F. Earp
• Inventors: Earp, Eugene F.
• Primary Examiner(s): Wyse, Tom
• Application Number:
  US07/174,973
• Time in Patent Office: 882 Days
• Field of Search: 210/751, 106/89, 106/98, 405/128, 405/129
• US Class Current: 106/709
• CPC Class Codes: A62D 2101/20 Organic substances
• CPC Class Codes: A62D 2101/22 containing halogen
• CPC Class Codes: A62D 2101/26 containing nitrogen or phosphorus
• CPC Class Codes: A62D 2101/28 containing oxygen, sulfur, selenium or tellurium, i.e. chalcogen
• CPC Class Codes: A62D 2101/40 Inorganic substances
• CPC Class Codes: A62D 3/33 by chemical fixing the harmful substance, e.g. by chelation or complexation
• CPC Class Codes: C02F 11/008 Sludge treatment by fixation or solidification
• CPC Class Codes: C04B 14/28 of calcium
• CPC Class Codes: C04B 18/101 Burned rice husks or other burned vegetable material
• CPC Class Codes: C04B 2111/00784 for disposal only
• CPC Class Codes: C04B 22/10 containing carbon in the anion
• CPC Class Codes: C04B 22/143 Calcium-sulfate
• CPC Class Codes: C04B 22/16 containing phosphorus in the anion, e.g. phosphates
• CPC Class Codes: C04B 28/04 Portland cements
• CPC Class Codes: Y02W 30/91 Use of waste materials as fillers for mortars or concrete

Abstract

A method and composition for solidification or semicolidification of single or multi-phased waste including mixing the waste with a composition including having as its major component a cement, and, as lesser components, a fixative, an absorbant, and optionally an emulsifier. The composition of the invention is mixed with the waste and dried.

Claims

1. A composition for converting wastes to a solid or semi-solid state comprising:

a. about 50 percent to about 65 percent by weight of Portland cement,

b. about 20 percent to about 28 percent by weight of a fixative selected from the group consisting of calcium sulfate, compounds of calcium sulfate with water, calcium carbonate, and compounds of calcium carbonate with water,

c. about 5 percent to about 20 percent by weight of biogenetic, amorphous, silica ash, and

d. about 5 percent to about 10 percent by weight of an emulsifier selected from the group consisting of sodium phosphate and sodium carbonate, and mixtures thereof.

2. The composition of claim 1 wherein said cement is Portland cement Type I.

3. The composition of claim 1 wherein said fixative in calcium sulfate dihydrate.

4. The composition of claim 1 wherein said biogenetic, amorphus, silica ash contains about 5 percent carbon by weight.

5. The composition of claim 1 wherein said emulsifier is a detergent.

6. The composition of claim 1 wherein said composition comprises from about 50 to 60 percent by weight of Portland cement, about 20 to 25 percent by weight of said fixative, about 7 to about 20 percent by weight of said biogenetic, amorphous silica ash, and about 5 to about 10 by weight of said emulsifier.