Patents Assigned to Solidiwaste Technology, L.P.
  • Patent number: 5718735
    Abstract: A method of preparing a high heating value fuel product having the steps of blending a hydrocarbon-containing material with a dried sewage sludge, mixing a monomeric polyalcohol to the blend of the hydrocarbon-containing material and the dried sewage sludge, introducing a pozzolanic agent to the mixture, and forming the mixture into a form suitable for handling. The hydrocarbon-containing material is a waste material having a heating value of greater than 7,000 BTU. The monomeric polyalcohol is a chemical selected from the group of triethylene glycol, diethylene glycol, and glycerine propylene glycol. The pozzolantc agent is either lime fly ash, kiln dust, or other lime-containing product.
    Type: Grant
    Filed: September 18, 1992
    Date of Patent: February 17, 1998
    Assignee: Solidiwaste Technology, L.P.
    Inventors: Robin B. Somerville, Liang-tseng Fan
  • Patent number: 5242603
    Abstract: A process for treating waste by mixing the waste with a chemical reagent and a pozzolanic material. The chemical reagent includes a retarder that is a viscosity-altering reagent, and an accelerator.
    Type: Grant
    Filed: October 18, 1991
    Date of Patent: September 7, 1993
    Assignee: Solidiwaste Technology, L.P.
    Inventor: Liang-Tseng Fan
  • Patent number: 5049285
    Abstract: The process for immobilizing a hazardous waste containing heavy metals comprises the steps of pretreating the waste by adding a sulfide to the hazardous waste so as to generate the sulfides of the heavy metals from the hazardous waste, mixing a chemical reagent with the pretreated waste, and blending the mixture of the chemical reagent and the pretreated waste with a pozzolanic material. The chemical reagent contains a mixture of a retarder and an accelerator. This process further comprises the step of mixing a neutralizing reagent with the hazardous waste so as to cause the hazardous waste to have a pH of between 5 and 14. The neutralizing reagent is an alkaline material, preferably lime, hydrated lime, or calcium hydroxide. The sulfide is either sodium hydrosulfide or sodium sulfide.
    Type: Grant
    Filed: September 14, 1989
    Date of Patent: September 17, 1991
    Assignee: Solidiwaste Technology, L.P.
    Inventors: Robin B. Somerville, Liang-tseng Fan
  • Patent number: 4875905
    Abstract: A method of preparing a high heating value fuel product that comprises the steps of blending a high heating value sludge material with a cellulosic material, adding a microencapsulation reagent to the blended mixture of the sludge and the cellulosic material, introducing a pozzolanic agent to the blended mixture for controlling the rate of solidification, and forming the blended mixture into a form suitable for handling. The sludge is a material having a heating value of greater than 7,000 BTU. This sludge may be a complex mixture of organic hazardous waste streams. The cellulosic material is a silica-containing particulate material having a high heating value. The microencapsulating reagent is a mixture having a 4-15 weight percent of a chemical selected from the group of triethylene glycol, diethylene glycol, and glycerin propylene glycol. The microencapsulation reagent further may include a 20-32 weight percent calcium chloride solution. The pozzolanic agent is added to the mixture at a constant rate.
    Type: Grant
    Filed: November 14, 1988
    Date of Patent: October 24, 1989
    Assignee: Solidiwaste Technology, L.P.
    Inventors: Robin Somerville, Liang-Tseng Fan