Patents by Inventor Wayne C. Hazen
Wayne C. Hazen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Publication number: 20030215379Abstract: Disclosed is an apparatus for the calcination of materials using low temperature heating and indirect heating for calcination. Also disclosed are a variety of processes for calcination of materials which have-reduced emissions of pollutants compared to conventional processes.Type: ApplicationFiled: March 21, 2003Publication date: November 20, 2003Applicant: Environmental Projects, Inc.Inventors: Dale Lee Denham, Rudolph Pruszko, Wayne C. Hazen
-
Publication number: 20030091486Abstract: Disclosed is an apparatus for the calcination of materials using low temperature heating and indirect heating for calcination. Also disclosed are a variety of processes for calcination of materials which have reduced emissions of pollutants compared to conventional processes.Type: ApplicationFiled: October 1, 2002Publication date: May 15, 2003Applicant: Environmental Projects, Inc.Inventors: Dale Lee Denham, Rudolph Pruszko, Wayne C. Hazen
-
Publication number: 20030084547Abstract: The present invention provides a process for producing sodium carbonate monohydrate crystals by introduction of anhydrous sodium carbonate into a saturated sodium carbonate brine solution under conditions in which sodium carbonate monohydrate formation is favored. As the anhydrous sodium carbonate dissolves, the brine becomes supersaturated resulting in relief of supersaturation by formation of sodium carbonate monohydrate crystals. The process includes controlling supersaturation and its relief to achieve growth of existing sodium carbonate monohydrate crystals rather than nucleation and formation of new sodium carbonate monohydrate crystals. The resulting crystals are separated from insoluble impurities on a size separation basis.Type: ApplicationFiled: July 20, 2001Publication date: May 8, 2003Applicant: Environmental Projects, Inc.Inventors: Wayne C. Hazen, Dale Lee Denham, Rudolph Pruszko, David R. Baughman
-
Patent number: 6479025Abstract: A process for the production of sodium carbonate monohydrate is disclosed. The process includes heating a feed stream containing trona and insoluble impurities in a calcining apparatus to a temperature of less than about 350° C. to form anhydrous sodium carbonate. The anhydrous sodium carbonate is contacted with a saturated sodium carbonate brine solution to form sodium carbonate monohydrate crystals. Sodium carbonate monohydrate crystals are separated from insoluble impurities.Type: GrantFiled: September 11, 1998Date of Patent: November 12, 2002Assignee: Environmental Projects, Inc.Inventors: Dale Lee Denham, Jr., Rudolph Pruszko, Wayne C. Hazen
-
Patent number: 6464736Abstract: The present invention provides a process for producing crystals of a polymorphic compound in a first crystal structure by introduction of the compound in a second crystal structure into a saturated brine solution of the compound under conditions in which formation of the first crystal structure is favored and without evaporation or changes in temperature. As the second crystal structure dissolves, the brine becomes supersaturated resulting in relief of supersaturation by formation of crystals of the first crystal structure. The process includes controlling supersaturation and its relief to achieve growth of existing crystals of the first crystal structure rather than nucleation and formation of new crystals. The resulting crystals are separated from insoluble impurities on a size separation basis.Type: GrantFiled: March 9, 2000Date of Patent: October 15, 2002Assignee: Environmental Projects, Inc.Inventors: Wayne C. Hazen, Dale Lee Denham, Jr., David R. Baughman, Rudolph Pruszko
-
Patent number: 6284005Abstract: The present invention provides a process for producing sodium carbonate monohydrate crystals by introduction of anhydrous sodium carbonate into a saturated sodium carbonate brine solution under conditions in which sodium carbonate monohydrate formation is favored. As the anhydrous sodium carbonate dissolves, the brine becomes supersaturated resulting in relief of supersaturation by formation of sodium carbonate monohydrate crystals. The process includes controlling supersaturation and its relief to achieve growth of existing sodium carbonate monohydrate crystals rather than nucleation and formation of new sodium carbonate monohydrate crystals. The resulting crystals are separated from insoluble impurities on a size separation basis.Type: GrantFiled: January 28, 1999Date of Patent: September 4, 2001Assignee: Environmental Projects, Inc.Inventors: Wayne C. Hazen, Dale Lee Denham, Jr., Rudolph Pruszko, David R. Baughman, Ralph B. Tacoma
-
Publication number: 20010007650Abstract: Disclosed is an apparatus for the calcination of materials using low temperature heating and indirect heating for calcination. Also disclosed are a variety of processes for calcination of materials which have reduced emissions of pollutants compared to conventional processes.Type: ApplicationFiled: September 11, 1998Publication date: July 12, 2001Inventors: DALE LEE DENHAM, JR., RUDOLPH PRUSZKO, WAYNE C. HAZEN
-
Patent number: 6013382Abstract: A copper alloy plumbing fixture containing interdispersed lead particles coated non-continuously on a water contact surface to resist the leaching of lead into potable water systems. The leach resistant fixture is prepared by immersing conventional copper alloys in a bismuth nitrate solution, selectively and non-continuously coating the lead dispersoid particles on the water contact surface with bismuth, tin or copper.Type: GrantFiled: May 27, 1997Date of Patent: January 11, 2000Assignee: Technology Management Advisors LLCInventors: Enzo L. Coltrinari, Jerome P. Downey, Wayne C. Hazen, Paul B. Queneau
-
Patent number: 5911959Abstract: Disclosed are a variety of processes for the purification of saline minerals and in particular, trona. Some of the processes include a combination wet and dry recovery process which results in high recovery and purification at relatively low cost. The dry separation methods can include density separation, magnetic separation and electrostatic separation. Other processes include a modified slush process for the purification of calcined trona (sodium carbonate) by the introduction of anhydrous sodium carbonate into a saturated brine solution and subsequent separation of insoluble impurities.Type: GrantFiled: November 7, 1997Date of Patent: June 15, 1999Assignee: Environmental Projects, Inc.Inventors: John S. Wold, Wayne C. Hazen, Rudolph Pruszko, Roland Schmidt, Dale Lee Denham, Jr.
-
Patent number: 5736113Abstract: Disclosed is a method for beneficiating trona from a feedstream containing trona and impurities by a dry separation method, namely, electrostatically separating a first portion of impurities from the trona at a temperature between about 25.degree. C. and about 45.degree. C. The disclosed beneficiation of trona method may also include separation of impurities from trona by other dry separation methods, such as density separation, magnetic separation and size separation, and/or by wet separation methods.Type: GrantFiled: January 11, 1996Date of Patent: April 7, 1998Assignee: Environmental Projects, Inc.Inventors: Wayne C. Hazen, Roland Schmidt, Dale Lee Denham, Jr.
-
Patent number: 5660735Abstract: The present invention is a method to remove metals from solutions by precipitating the metals and adding cellulosic fiber to the solution. The precipitates attach to the cellulosic fibers to form products. The products may be removed from the solution by gravity separation techniques or by filtration. The removed products may be dewatered and incinerated. The method provides a simple and effective technique for removing low concentrations of metals from high volume solution streams.Type: GrantFiled: July 15, 1996Date of Patent: August 26, 1997Assignee: Hazen Research, Inc.Inventors: Enzo Coltrinari, Wayne C. Hazen
-
Patent number: 5632825Abstract: A copper alloy plumbing fixture containing interdispersed lead particles coated noncontinuously on a water contact surface to resist the leaching of lead into potable water systems. The leach resistant fixture is prepared by immersing conventional copper alloys in a bismuth nitrate solution, selectively and noncontinuously coating the lead dispersoid particles on the water contact surface with bismuth. Tin may be substituted for bismuth to obtain similar results.Type: GrantFiled: February 14, 1996Date of Patent: May 27, 1997Assignee: Technology Management Advisors LLCInventors: Enzo L. Coltrinari, Jerome P. Downey, Wayne C. Hazen, Paul B. Queneau
-
Patent number: 5544859Abstract: A copper alloy plumbing fixture containing interdispersed lead particles coated noncontinuously on a water contact surface to resist the leaching of lead into potable water systems. The leach resistant fixture is prepared by immersing conventional copper alloys in a bismuth nitrate solution, selectively and noncontinuously coating the lead dispersoid particles on the water contact surface with bismuth. Tin may be substituted for bismuth to obtain similar results.Type: GrantFiled: June 3, 1994Date of Patent: August 13, 1996Assignee: Hazen Research, Inc.Inventors: Enzo L. Coltrinari, Jerome P. Downey, Wayne C. Hazen, Paul B. Queneau
-
Patent number: 5536416Abstract: The present invention is a method to remove metals from solutions by precipitating the metals and adding cellulosic fiber to the solution. The precipitates attach to the cellulosic fibers to form products. The products may be removed from the solution by gravity separation techniques or by filtration. The removed products may be dewatered and incinerated. The method provides a simple and effective technique for removing low concentrations of metals from high volume solution streams.Type: GrantFiled: October 31, 1994Date of Patent: July 16, 1996Assignee: Hazen Research, Inc.Inventors: Enzo Coltrinari, Wayne C. Hazen
-
Patent number: 4606764Abstract: The invention comprises the treatment of metal oxides and mixed metal oxides and metal sulfides in a vertical tube reactor system having a downcomer section and a riser section in order to oxidize and dissolve the metal values in aqueous slurry primarily in the downcomer section and introducing a reducing agent comprising a formate species and reducing the dissolved metal values in the riser section. The reduced metal values are then separated with the gangue values from the product solution downstream from the vertical tube reactor system. The reduced metal values may then be separated from the gangue material by conventional solid separation techniques, such as flotation.Type: GrantFiled: January 11, 1985Date of Patent: August 19, 1986Assignee: Resource Technology AssociatesInventors: Wayne C. Hazen, Enzo L. Coltrinari, John E. Litz, David L. Thompson
-
Patent number: 4192676Abstract: Copper is recovered from copper salts selected from the group consisting of copper chlorides, copper oxides and copper oxychlorides by reducing the finely divided solid copper salts with hydrogen under turbulent conditions at a temperature greater than the melting point of elemental copper.Type: GrantFiled: May 11, 1978Date of Patent: March 11, 1980Assignee: Cyprus Metallurgical Processes CorporationInventors: James E. Reynolds, Wayne C. Hazen, Duane N. Goens