ROBERT BENDER
Dentist in Pittsburgh, PA
License number
Pennsylvania DS019778L
Category
Dentistry
Type
Dentist
Address
Address
Pittsburgh, PA 15232
Professional information
Method Of Beneficiating Coal
US Patent:
4560390, Dec 24, 1985
Filed:
Sep 22, 1983
Appl. No.:
6/534618
Inventors:
Robert Bender - Pittsburgh PA
International Classification:
C10L 902
US Classification:
44 15R
Abstract:
A process for reducing the sulfur and ash content of coal is provided. The process involves cleaning the coal of debris and pulverizing it. The pulverized coal is contacted with a reagent selected from the group consisting of aqueous solutions of active nitrogen containing compounds, aqueous solutions of organic compounds containing at least one hydroxyl group, surfactants containing active ammonium groups and combinations thereof. The coal is washed with water and dried.
Methods Of Treating Coal To Remove Sulfur And Ash
US Patent:
4328002, May 4, 1982
Filed:
Jun 15, 1981
Appl. No.:
6/273912
Inventors:
Robert Bender - Pittsburgh PA
International Classification:
C10L 906
US Classification:
44 1SR
Abstract:
Methods of treating coal to remove sulfur and ash are provided which involve the steps of preconditioning coal particles in the presence of an aqueous solution of an oxidizing agent, washing said pretreated coal with water, contacting said coal with an aqueous solution of an oxidizing agent until an exothermic reaction between the coal and oxidizing agent peaks and the pH drops to the range of 2 to 3, removing the coal from the oxidizing agent, contacting the coal with a passivating agent until the temperature of the coal drops and the pH rises into the range 3 to 5, neutralizing the coal up to a pH of about 9, washing said coal with water and drying said coal.