Patents by Inventor Denis G. Fallon
Denis G. Fallon 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).
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Publication number: 20160040360Abstract: A process for treating a cellulosic material comprising pretreating the cellulosic material and then extracting the cellulosic material with an extractant to selectively extract hemicellulose therefrom and separating the extracted hemicellulose to form a cellulosic product comprising less hemicellulose than the cellulosic material. The extractant comprises a cellulose solvent and a co-solvent. The cellulosic product advantageously retains its cellulosic fiber morphology. The processes involve separating and recovering the hemicellulose and separating and recycling various process streams employed in the process.Type: ApplicationFiled: August 3, 2015Publication date: February 11, 2016Inventors: Bin Li, Leslie Allen, Dinesh Arora, Prabuddha Bansal, Monica Boatwright, Christopher M. Bundren, Michael T. Combs, Denis G. Fallon, Rongfu Li, Jay Mehta, Tianshu Pan
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Publication number: 20150232582Abstract: Hemicellulose compositions are prepared by treating a cellulosic material with an extractant comprising a cellulose solvent and co-solvent. The hemicellulose compositions preferably comprise from 55 to 99 wt. % xylan and have distinct molecular weights, elemental metal ions, and intrinsic viscosities when compared to known hemicellulose compositions.Type: ApplicationFiled: October 30, 2014Publication date: August 20, 2015Inventors: Denis G. Fallon, Leslie Allen, Dinesh Arora, Monica Boatwright, Christopher M. Bundren, Michael T. Combs, Bin Li, Rongfu Li, Jay Mehta, Tianshu Pan
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Publication number: 20150233055Abstract: Dissolving-grade pulp compositions are prepared by treating a cellulosic material with an extractant comprising a cellulose solvent and co-solvent. The dissolving-grade pulp compositions comprise at least 90 wt. % glucan, from 0.6 to 5 wt. % xylan, and have distinct molecular weights, and elemental metal ions from known and commercially available dissolving-grade pulp compositions.Type: ApplicationFiled: October 30, 2014Publication date: August 20, 2015Inventors: Denis G. Fallon, Leslie Allen, Dinesh Arora, Monica Boatwright, Christopher M. Bundren, Michael T. Combs, Bin Li, Rongfu Li, Jay Mehta, Tianshu Pan
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Publication number: 20150041084Abstract: A process for treating a cellulosic material comprising extracting hemicellulose from the cellulosic material with an extractant comprising a cellulose solvent and a co-solvent to selectively extract hemicellulose therefrom and separating the extracted hemicellulose to form a cellulosic product comprising less hemicellulose than the cellulosic material. The extractant comprises a cellulose solvent and a co-solvent. The cellulose solvent is selected from the group consisting of an ionic liquid, an amine oxide and combinations thereof, and the co-solvent may preferably have a boiling point less than 120° C., or less than 100° C. The cellulosic product advantageously retains its cellulosic fiber morphology. The processes involve separating and recovering the hemicellulose and separating and recycling various process streams employed in the process.Type: ApplicationFiled: August 6, 2014Publication date: February 12, 2015Inventors: Tianshu Pan, Dinesh Arora, Monica Boatwright, Michael T. Combs, Denis G. Fallon, Bin Li, Rongfu Li, Jennifer Maddrey, Jay Mehta
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Publication number: 20150014150Abstract: Integration of a carboxylic anhydride purification system in the manufacturing of cellulose esters may include processes that includes distilling the crude carboxylic anhydride stream (that includes a carboxylic anhydride and a carboxylic acid) in a distillation column having an overhead or side stream comprising purified, vaporous carboxylic anhydride and a bottoms stream; heating a steam condensate stream in a steam generator to yield a low-temperature steam; and cooling at least a portion of the overhead or side stream to yield a cooled overhead or side stream. In some instances, a heat exchanger may be utilized in parallel or series with the steam generator.Type: ApplicationFiled: July 11, 2013Publication date: January 15, 2015Inventor: Denis G. Fallon
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Publication number: 20150014148Abstract: Integration of an acid recovery system in the manufacturing of cellulose esters may include heat recovery from a carboxylic acid recovery distillation column by solvent extracting a weak acid stream to form a first overhead stream and a first bottoms stream; distilling the first overhead stream in a distillation column to form a second overhead stream and a second bottoms stream; sending at least a portion of the second overhead stream to a heat exchanger via a process inlet; sending a boiler feed water make up stream to the heat exchanger via a water inlet; and cooling the at least a portion of the second overhead stream in the heat exchanger, such that the at least a portion of second overhead stream exits the heat exchanger via a process outlet and the boiler feed water make up stream exits the heat exchanger via a water outlet.Type: ApplicationFiled: July 11, 2013Publication date: January 15, 2015Inventor: Denis G. Fallon
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Publication number: 20140326422Abstract: A process for converting a starting material to a purified pulp material, comprising removing lignin from a starting material to form a wet pulp comprising at least 5 wt. % water, extracting hemicellulose from the wet pulp with an extractant, and separating the extracted hemicellulose from the extraction mixture to form a cellulosic product comprising less hemicellulose than the wet pulp. The extractant comprises a cellulose solvent and a co-solvent. The cellulosic product advantageously retains its cellulosic fiber morphology. The process involves separating and recovering hemicellulose and separating and recycling various process streams employed in the process.Type: ApplicationFiled: May 2, 2014Publication date: November 6, 2014Applicant: Celanese International CorporationInventors: Denis G. Fallon, Bin Li, Rongfu Li, Jay Mehta, Tianshu Pan, Jaimes Sher, Leslie Allen, Dinesh Arora, Monica Boatwright, Christopher M. Bundren, Michael T. Combs
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Publication number: 20140326421Abstract: A process for treating a cellulosic material comprising extracting the cellulosic material with an extractant to selectively extract hemicellulose therefrom and separating the extracted hemicellulose to form a cellulosic product comprising less hemicellulose than the cellulosic material. The extractant comprises a cellulose solvent and a co-solvent. The cellulosic product advantageously retains its cellulosic fiber morphology. The processes involve separating and recovering the hemicellulose and separating and recycling various process streams employed in the process.Type: ApplicationFiled: May 2, 2014Publication date: November 6, 2014Applicant: Celanese International CorporationInventors: Denis G. Fallon, Thomas S. Garrett, Lawton Kizer, Bin Li, Rongfu Li, Jay Mehta, Tianshu Pan, Xiaoyan Tu, Leslie Allen, Dinesh Arora, Prabuddha Bansal, Michael T. Combs
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Publication number: 20140315720Abstract: A method for producing a polysaccharide ester microsphere may include forming a polysaccharide ester product from a polysaccharide synthesis, wherein the polysaccharide ester product comprises a polysaccharide ester and a solvent; diluting the polysaccharide ester product, thereby yielding a polysaccharide ester dope; and forming a plurality of polysaccharide ester microspheres from the polysaccharide ester dope. Suitable polysaccharides may include, but are not limited to, starch, cellulose, hemicellulose, algenates, chitosan, and any combination thereof. Esters thereof may be organic esters (e.g., acetate and the like), inorganic esters (e.g., sulfonates and the like), or combinations thereof. Further, the solids conent of the polysaccharide ester dope, in some instances, may be greater than about 16 wt %.Type: ApplicationFiled: April 4, 2014Publication date: October 23, 2014Applicant: Celanese Acetate LLCInventors: Denis G. Fallon, Thomas S. Garrett, Lawton E. Kizer, Karen L. Zazzara, Michael T. Combs, Richard K. Johnson, Gary Dehart
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Publication number: 20140299143Abstract: A spinneret having tri-arc holes may be used to produce tri-arc filaments. In some instances, tri-arc holes have a Y-shape with three prongs and each prong having an arc at the end of the prong that tapers from the end of the arc to a connection point of an adjacent arc, and tri-arc filaments have a generally-Y shape cross-section with bulbous or arcing tips. Further, tri-arc filaments may be useful in a plurality of applications including, but not limited to, filters, filters comprising particulate additives, and smoking device filters.Type: ApplicationFiled: June 20, 2014Publication date: October 9, 2014Applicant: Celanese Acetate LLCInventors: Christopher M. Bundren, Lawton E. Kizer, Denis G. Fallon, Lixin Xue
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Patent number: 8790556Abstract: A spinneret having tri-arc holes may be used to produce tri-arc filaments. In some instances, tri-arc holes have a Y-shape with three prongs and each prong having an arc at the end of the prong that tapers from the end of the arc to a connection point of an adjacent arc, and tri-arc filaments have a generally-Y shape cross-section with bulbous or arcing tips. Further, tri-arc filaments may be useful in a plurality of applications including, but not limited to, filters, filters comprising particulate additives, and smoking device filters.Type: GrantFiled: July 25, 2012Date of Patent: July 29, 2014Assignee: Celanese Acetate LLCInventors: Christopher M. Bundren, Lawton E. Kizer, Denis G. Fallon, Lixin Xue
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Publication number: 20140113826Abstract: A method for producing a polysaccharide ester microsphere may include forming a polysaccharide ester product from a polysaccharide synthesis, wherein the polysaccharide ester product comprises a polysaccharide ester and a solvent; diluting the polysaccharide ester product, thereby yielding a polysaccharide ester dope; and forming a plurality of polysaccharide ester microspheres from the polysaccharide ester dope. Suitable polysaccharides may include, but are not limited to, starch, cellulose, hemicellulose, algenates, chitosan, and any combination thereof. Esters thereof may be organic esters (e.g., acetate and the like), inorganic esters (e.g., sulfonates and the like), or combinations thereof. Further, the solids conent of the polysaccharide ester dope, in some instances, may be greater than about 16 wt %.Type: ApplicationFiled: October 23, 2013Publication date: April 24, 2014Applicant: Celanese Acetate LLCInventors: Denis G. Fallon, Thomas S. Garrett, Lawton E. Kizer, Karen L. Zazzara, Michael T. Combs, Richard K. Johnson, Gary Dehart
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Publication number: 20140026910Abstract: A spinneret having tri-arc holes may be used to produce tri-arc filaments. In some instances, tri-arc holes have a Y-shape with three prongs and each prong having an arc at the end of the prong that tapers from the end of the arc to a connection point of an adjacent arc, and tri-arc filaments have a generally-Y shape cross-section with bulbous or arcing tips. Further, tri-arc filaments may be useful in a plurality of applications including, but not limited to, filters, filters comprising particulate additives, and smoking device filters.Type: ApplicationFiled: July 25, 2012Publication date: January 30, 2014Applicant: Celanese Acetate LLCInventors: Christopher M. Bundren, Lawton E. Kizer, Denis G. Fallon, Lixin Xue
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Publication number: 20140026911Abstract: A spinneret having tri-arc holes may be used to produce tri-arc filaments. In some instances, tri-arc holes have a Y-shape with three prongs and each prong having an arc at the end of the prong that tapers from the end of the arc to a connection point of an adjacent arc, and tri-arc filaments have a generally-Y shape cross-section with bulbous or arcing tips. Further, tri-arc filaments may be useful in a plurality of applications including, but not limited to, filters, filters comprising particulate additives, and smoking device filters.Type: ApplicationFiled: July 25, 2012Publication date: January 30, 2014Applicant: Celanese Acetate LLCInventors: Christopher M. Bundren, Lawton E. Kizer, Denis G. Fallon, Lixin Xue
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Patent number: 7081423Abstract: The invention is directed to a nonwoven material made of a bicomponent fiber in which the first polymer is a cellulose ester polymer, preferably cellulose acetate, and the second polymer is selected from the group consisting of polyolefins, polyesters, polyamides and polyimides. The bicomponent fiber can be either a side-by-side or a core-and-sheath fibers. When core-and-sheath, the cellulose acetate is the sheath polymer. The nonwoven material of the invention can be used to prepare grips, materials for use in absorbent products such as diapers and personal hygiene products, disposable towels and other products. The nonwoven of the invention has particular utility for disposable diaper products due to the superior fluid acquisition, retention and distribution properties of the cellulose ester, yet avoids the high cost of all cellulose acetate fibers by use of a much less expensive second polymer to form part the bicomponent fiber.Type: GrantFiled: June 26, 2002Date of Patent: July 25, 2006Assignee: Celanese Acetate LLCInventors: Jean-Claude Abed, Denis G. Fallon
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Publication number: 20020177379Abstract: The invention is directed to a nonwoven material made of a bicomponent fiber in which the first polymer is a cellulose ester polymer, preferably cellulose acetate, and the second polymer is selected from the group consisting of polyolefins, polyesters, polyamides and polyimides. The bicomponent fiber can be either a side-by-side or a core-and-sheath fibers. When core-and-sheath, the cellulose acetate is the sheath polymer. The nonwoven material of the invention can be used to prepare grips, materials for use in absorbent products such as diapers and personal hygiene products, disposable towels and other products. The nonwoven of the invention has particular utility for disposable diaper products due to the superior fluid acquisition, retention and distribution properties of the cellulose ester, yet avoids the high cost of all cellulose acetate fibers by use of a much less expensive second polymer to form part the bicomponent fiber.Type: ApplicationFiled: June 26, 2002Publication date: November 28, 2002Inventors: Jean-Claude Abed, Denis G. Fallon
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Patent number: 5648529Abstract: The present invention is directed to a process for the recovery of an organic acid. The organic acid is generated from the manufacture of a cellulose ester. The first step of the process is to remove the organic acid from the manufacture of cellulose ester. The acid is in the form of a weak acid stream comprising of the organic acid and water. The weak acid stream is resolved, via a solvent extraction, to form an extractor overhead stream and raffinate stream. The raffinate stream comprises solvent, water, and alcohol. The alcohol is produced in the recovery process by hydrolysis of the solvent after the solvent extraction. The raffinate stream is resolved into a overhead stream and a bottom stream. The overhead stream comprises water, alcohol, and solvent. Excess organic acid is added to the overhead stream to form a feed stream. The feed stream is catalyzed, via ion exchange resins, whereby a portion of the alcohol is esterified to the solvent.Type: GrantFiled: May 16, 1995Date of Patent: July 15, 1997Assignee: Hoechst Celanese CorporationInventors: Stephen C. Jones, Denis G. Fallon