Patents by Inventor Darrell M. Waite
Darrell M. Waite 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).
-
Patent number: 10975520Abstract: The present disclosure relates to producing paper or paperboard having improved stiffness and strength, compared to the conventional paperboard at the same basis weight. It also discloses a method of wood pulping having a significantly increased yield and providing fiber pulps with enhanced properties such as strength and stiffness. Wood chips are chemically pulped to a high kappa number, providing a rejects component and an accepts component. The rejects component is subjected to a substantially mechanical pulping process, optionally in a presence of bleaching agent, prior to blending back into the accepts component. The resulting fiber blend is washed, optionally bleached, and subjected to a papermaking process to provide paper or paperboard with enhanced strength and stiffness at low basis weight.Type: GrantFiled: July 24, 2018Date of Patent: April 13, 2021Assignee: WestRock MWV, LLCInventors: Peter W. Hart, Darrell M. Waite, Dale E. Nutter, Jr., Jared Bradberry
-
Publication number: 20180347110Abstract: The present disclosure relates to producing paper or paperboard having improved stiffness and strength, compared to the conventional paperboard at the same basis weight. It also discloses a method of wood pulping having a significantly increased yield and providing fiber pulps with enhanced properties such as strength and stiffness. Wood chips are chemically pulped to a high kappa number, providing a rejects component and an accepts component. The rejects component is subjected to a substantially mechanical pulping process, optionally in a presence of bleaching agent, prior to blending back into the accepts component. The resulting fiber blend is washed, optionally bleached, and subjected to a papermaking process to provide paper or paperboard with enhanced strength and stiffness at low basis weight.Type: ApplicationFiled: July 24, 2018Publication date: December 6, 2018Inventors: Peter W. Hart, Darrell M. Waite, Dale E. Nutter, Jr., Jared Bradberry
-
Patent number: 10060075Abstract: The present disclosure relates to producing paper or paperboard having improved stiffness and strength, compared to the conventional paperboard at the same basis weight. It also discloses a method of wood pulping having a significantly increased yield and providing fiber pulps with enhanced properties such as strength and stiffness. Wood chips are chemically pulped to a high kappa number, providing a rejects component and an accepts component. The rejects component is subjected to a substantially mechanical pulping process, optionally in a presence of bleaching agent, prior to blending back into the accepts component. The resulting fiber blend is washed, optionally bleached, and subjected to a papermaking process to provide paper or paperboard with enhanced strength and stiffness at low basis weight.Type: GrantFiled: April 6, 2015Date of Patent: August 28, 2018Assignee: WestRock MWV, LLCInventors: Peter W. Hart, Darrell M. Waite, Dale E. Nutter, Jr., Jared Bradberry
-
Patent number: 10000889Abstract: A method of wood pulping having a significantly increased yield is disclosed. Wood chips are chemically pulped to a high kappa number, providing a first accepts component and a first rejects component. The first rejects component is subjected to a high consistency pulping process such as a substantially mechanical pulping process to generate a second accepts component and a second rejects component. The first accepts component may be used in the production of saturating kraft paper with excellent saturability and resin pick up. The second accepts may be used as a second fiber source in the production of multiply linerboard and unbleached paperboard with enhanced stiffness, strength, and smoothness. Alternatively, the first accepts component may be blended with the second accepts component to produce fiber blends, which may be used in a production of paper-based products having enhanced strength and stiffness at low basis weight.Type: GrantFiled: April 6, 2015Date of Patent: June 19, 2018Assignee: WestRock MWV, LLCInventors: Peter W. Hart, Darrell M. Waite, Dale E. Nutter, Jr., Jared Bradberry
-
Publication number: 20160333529Abstract: A method of wood pulping having a significantly increased yield is disclosed. Wood chips are chemically pulped to a high kappa number, providing a first accepts component and a first rejects component. The first rejects component is subjected to a high consistency pulping process such as a substantially mechanical pulping process to generate a second accepts component and a second rejects component. The first accepts component may be used in the production of saturating kraft paper with excellent saturability and resin pick up. The second accepts may be used as a second fiber source in the production of multiply linerboard and unbleached paperboard with enhanced stiffness, strength, and smoothness. Alternatively, the first accepts component may be blended with the second accepts component to produce fiber blends, which may be used in a production of paper-based products having enhanced strength and stiffness at low basis weight.Type: ApplicationFiled: April 6, 2015Publication date: November 17, 2016Inventors: Peter W. HART, Darrell M. WAITE, Dale E. NUTTER, JR., Jared BRADBERRY
-
Patent number: 9228243Abstract: A system and method for hardwood pulp liquid hydrolysate conditioning is provided. The system includes a first evaporator, a hydrolysis unit, at least one lignin separation device, a neutralization device, a precipitate removal device, a solvent extraction unit, a lignin removal and recovery unit, an acid and furfural separation and conditioning unit, and an electrodialysis device, which process a quantity of hardwood mix to produce a desalinated solution containing sugar.Type: GrantFiled: August 23, 2012Date of Patent: January 5, 2016Assignees: Red Shield Acquistion, LLC, University of Maine System of Board of TrusteesInventors: Darrell M. Waite, Richard Arnold, James St. Pierre, Hemant P. Pendse, William H. Ceckler, Amy Elizabeth Luce, Rino P. Dumont
-
Publication number: 20150211184Abstract: The present disclosure relates to producing paper or paperboard having improved stiffness and strength, compared to the conventional paperboard at the same basis weight. It also discloses a method of wood pulping having a significantly increased yield and providing fiber pulps with enhanced properties such as strength and stiffness. Wood chips are chemically pulped to a high kappa number, providing a rejects component and an accepts component. The rejects component is subjected to a substantially mechanical pulping process, optionally in a presence of bleaching agent, prior to blending back into the accepts component. The resulting fiber blend is washed, optionally bleached, and subjected to a papermaking process to provide paper or paperboard with enhanced strength and stiffness at low basis weight.Type: ApplicationFiled: April 6, 2015Publication date: July 30, 2015Inventors: Peter W. HART, Darrell M. WAITE, Dale E. NUTTER, JR., Jared BRADBERRY
-
Publication number: 20150211188Abstract: A method of wood pulping having a significantly increased yield is disclosed. Wood chips are chemically pulped to a high kappa number, providing a first accepts component and a first rejects component. The first rejects component is subjected to a high consistency pulping process such as a substantially mechanical pulping process to generate a second accepts component and a second rejects component. The first accepts component may be used in the production of saturating kraft paper with excellent saturability and resin pick up. The second accepts may be used as a second fiber source in the production of multiply linerboard and unbleached paperboard with enhanced stiffness, strength, and smoothness. Alternatively, the first accepts component may be blended with the second accepts component to produce fiber blends, which may be used in a production of paper-based products having enhanced strength and stiffness at low basis weight.Type: ApplicationFiled: April 6, 2015Publication date: July 30, 2015Inventors: Peter W. HART, Darrell M. WAITE, Dale E. NUTTER, JR., Jared BRADBERRY
-
Patent number: 8608970Abstract: A system and method for hardwood pulp liquid hydrolysate conditioning includes a first evaporator receives a hardwood mix extract and outputting a quantity of vapor and extract. A hydrolysis unit receives the extract, hydrolyzes and outputs to a lignin separation device, which separates and recovers a quantity of lignin. A neutralization device receives extract from the lignin separation device and a neutralizing agent, producing a mixture of solid precipitate and a fifth extract. The solid precipitate is removed from the fifth extract. A second evaporator removes a quantity of acid from the fifth extract in a vapor form. This vapor may be recycled to improve total acid recovery or discarded. A desalination device receives the diluted extract, separates out some of the acid and salt and outputs a desalinated solution.Type: GrantFiled: July 21, 2011Date of Patent: December 17, 2013Assignees: Red Shield Acquisition, LLC, University of Maine System Board of TrusteesInventors: Darrell M. Waite, Richard Arnold, James St. Pierre, Hemant P. Pendse, William H. Ceckler
-
Publication number: 20130306256Abstract: A method for wood pulping including chemically pulping wood chips to a kappa number sufficient to generate a first amount of pulp including a first accepts component and 6 to 50 percent by weight of the first amount of pulp of a first rejects component, separating the first accepts component from the first rejects component, performing a high consistency, substantially mechanical pulping of the first rejects component to generate a second amount of pulp including a second accepts component and a second rejects component, and separating the second accepts component from the second rejects component.Type: ApplicationFiled: July 31, 2013Publication date: November 21, 2013Applicant: MeadWestvaco CorporationInventors: Peter W. Hart, Darrell M. Waite, Dale E. Nutter, Jared Bradberry
-
Publication number: 20130220815Abstract: A system and method for hardwood pulp liquid hydrolysate conditioning is provided. The system includes a first evaporator, a hydrolysis unit, at least one lignin separation device, a neutralization device, a precipitate removal device, a solvent extraction unit, a lignin removal and recovery unit, an acid and furfural separation and conditioning unit, and an electrodialysis device, which process a quantity of hardwood mix to produce a desalinated solution containing sugar.Type: ApplicationFiled: August 23, 2012Publication date: August 29, 2013Inventors: Darrell M. Waite, Richard Arnold, James St. Pierre, Hernant P. Pendse, William H. Ceckler, Amy Elizabeth Luce, Rino P. Dumont
-
Publication number: 20130224805Abstract: A process and apparatus for converting cellulosic biomass pulp into a sugar solution is provided. The process includes combining a quantity of cellulosic biomass pulp with a quantity of acid and a quantity of enzyme. The combined quantity of cellulosic biomass pulp, enzyme, and acid are placed in an enzymatic hydrolysis reactor having a predetermined temperature range and predetermined pH level, thereby producing a quantity of monomeric sugar solution.Type: ApplicationFiled: August 23, 2012Publication date: August 29, 2013Inventors: Darrell M. Waite, Richard Arnold, James St. Pierre, Rino P. Dumont, James Alan Hargreaves, William H. Ceckler
-
Publication number: 20120017891Abstract: A system and method for hardwood pulp liquid hydrolysate conditioning includes a first evaporator receives a hardwood mix extract and outputting a quantity of vapor and extract. A hydrolysis unit receives the extract, hydrolyzes and outputs to a lignin separation device, which separates and recovers a quantity of lignin. A neutralization device receives extract from the lignin separation device and a neutralizing agent, producing a mixture of solid precipitate and a fifth extract. The solid precipitate is removed from the fifth extract. A second evaporator removes a quantity of acid from the fifth extract in a vapor form. This vapor may be recycled to improve total acid recovery or discarded. A desalination device receives the diluted extract, separates out some of the acid and salt and outputs a desalinated solution.Type: ApplicationFiled: July 21, 2011Publication date: January 26, 2012Inventors: Darrell M. Waite, Richard Arnold, James St. Pierre, Hemant P. Pendse, William H. Ceckler
-
Publication number: 20100175840Abstract: A method of wood pulping having a significantly increased yield is disclosed. Wood chips are chemically pulped to a high kappa number, providing a first accepts component and a first rejects component. The first rejects component is subjected to a high consistency pulping process such as a substantially mechanical pulping process to generate a second accepts component and a second rejects component. The first accepts component may be used in the production of saturating kraft paper with excellent saturability and resin pick up. The second accepts may be used as a second fiber source in the production of multiply linerboard and unbleached paperboard with enhanced stiffness, strength, and smoothness. Alternatively, the first accepts component may be blended with the second accepts component to produce fiber blends, which may be used in a production of paper-based products having enhanced strength and stiffness at low basis weight.Type: ApplicationFiled: April 21, 2008Publication date: July 15, 2010Inventors: Peter W. Hart, Darrell M. Waite
-
Publication number: 20080308239Abstract: The present disclosure relates to producing paper or paperboard having improved stiffness and strength, compared to the conventional paperboard at the same basis weight. It also discloses a method of wood pulping having a significantly increased yield and providing fiber pulps with enhanced properties such as strength and stiffness. Wood chips are chemically pulped to a high kappa number, providing a rejects component and an accepts component. The rejects component is subjected to a substantially mechanical pulping process, optionally in a presence of bleaching agent, prior to blending back into the accepts component. The resulting fiber blend is washed, optionally bleached, and subjected to a papermaking process to provide paper or paperboard with enhanced strength and stiffness at low basis weight.Type: ApplicationFiled: June 12, 2007Publication date: December 18, 2008Inventors: Peter W. Hart, Darrell M. Waite, Dale E. Nutter
-
Publication number: 20080060774Abstract: A paperboard containing microplatelet cellulose particles has improved surface smoothness, aesthetic properties, bending stiffness and strength performance. When microplatelet cellulose particles are used for surface treatment of the paperboard, the microplatelets fill voids between fibers on the board surface. As a result, treated board has enhanced strength and surface properties such as smoothness, opacity, coating hold-out, and printability without compromising bending stiffness. Furthermore, the present disclosure relates to a process for improving board strength, surface smoothness and/or bending stiffness without the needs for densification, while maintaining other desired performances.Type: ApplicationFiled: September 7, 2007Publication date: March 13, 2008Inventors: Paul J. Zuraw, Mark A. Johnson, David E. Knox, Darrell M. Waite