Patents Assigned to The Purolite Company
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Patent number: 8729295Abstract: The present invention provides methods of using a novel sulfonated resin catalyst, showing improved performance. The catalyst has reduced or partial functionalization, throughout the sulfonated region of the polymer, leading to reduced by-product formation and other desirable features. This catalyst has particular usefulness in reactions or processes sensitive to high acidity, e.g., esterification-transesterification.Type: GrantFiled: October 24, 2008Date of Patent: May 20, 2014Assignee: The Purolite CompanyInventors: James A. Dale, Luc Froment, Satish Bapat
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Patent number: 8663476Abstract: A new process for ion exchange softening of water used in Once-Through Steam Generators (OTSGs) by recovering and using the salt content of the blowdown water from the OTSG to regenerate the softener resin is provided, thus eliminating the cost for commercial regenerant salt that would otherwise be needed. Further, the very high purity of the salt recovered in the blowdown inherently results in the production of softened water with hardness leakage levels that are an order of magnitude lower than can be attained using commercial salt, thus reducing scale deposit potential and improving operating efficiency and reliability of the OTSG.Type: GrantFiled: February 4, 2009Date of Patent: March 4, 2014Assignee: The Purolite CompanyInventor: Francis Boodoo
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Patent number: 8496121Abstract: The present invention provides a macroporous copolymer having large pores, typically in the range of 5,000-200,000 ? and a typical breaking weight of at least 175 g/bead. The macroporous copolymers can be made using an interpenetrating polymer network (IPN) techniques. These macroporous copolymers may also form macroporous resins. The present invention also provides methods of using the macroporous copolymers and resins.Type: GrantFiled: March 26, 2008Date of Patent: July 30, 2013Assignee: The Purolite CompanyInventors: James A. Dale, Vladimir Sochilin, Luc Froment
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Publication number: 20110278225Abstract: The present invention provides a method for purifying or softening water comprising: passing a specific volume of feedwater through at least one service column comprising a strong acid cationic exchange resin capable of binding divalent cations that are present in the feedwater, wherein the loading of the divalent cations on the resin is restricted to about 1 to 25% of the available ion exchange sites on the resin, and the total dissolved solids in the feedwater is greater than 100 mg/l; feeding the water exiting the service column to a reverse osmosis membrane or a nanofiltration membrane to produce permeate water stream and a reject water stream; and passing all or some of the volume of the reject stream corresponding the specific volume of feedwater through at least one off-line column capable of binding monovalent cations; wherein the chemical equivalent ratio of monovalent to divalent cations in the water exiting the service column is greater than 20 to 1; wherein no external source of regenerant salt isType: ApplicationFiled: April 28, 2011Publication date: November 17, 2011Applicant: BROTECH CORP., D/B/A THE PUROLITE COMPANYInventor: Francis Boodoo
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Publication number: 20110086929Abstract: The present invention provides a method of reducing the concentration of an iodide compound using an ion exchange resin. The ion exchange resin is a macroporous resin having sulfur functional groups exchanged with silver, a dry weight capacity of at least 5.0 eq/kg, a mean pore diameter (D50) of about 400-800 ?, a pore volume of about 0.4-0.6 ml/g, and a surface area of about 20-40 m2/g.Type: ApplicationFiled: July 16, 2010Publication date: April 14, 2011Applicant: Brotech Corporation, doing business as The Purolite CompanyInventor: Hsiang Wei Tsao
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Publication number: 20100193444Abstract: A new process for ion exchange softening of water used in Once-Through Steam Generators (OTSGs) by recovering and using the salt content of the blowdown water from the OTSG to regenerate the softener resin is provided, thus eliminating the cost for commercial regenerant salt that would otherwise be needed. Further, the very high purity of the salt recovered in the blowdown inherently results in the production of softened water with hardness leakage levels that are an order of magnitude lower than can be attained using commercial salt, thus reducing scale deposit potential and improving operating efficiency and reliability of the OTSG.Type: ApplicationFiled: February 4, 2009Publication date: August 5, 2010Applicant: The Purolite CompanyInventor: Francis Boodoo
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Patent number: 7588690Abstract: The present invention provides a method of reducing the concentration of an iodide compound using an ion exchange resin. The ion exchange resin is a macroporous resin having sulfur functional groups exchanged with silver, a dry weight capacity of at least 5.0 eq/kg, a mean pore diameter (D50) of about 400-800 ?, a pore volume of about 0.4-0.6 ml/g, and a surface area of about 20-40 m2/g.Type: GrantFiled: February 10, 2009Date of Patent: September 15, 2009Assignee: The Purolite CompanyInventor: Hsiang Wei Tsao
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Publication number: 20090112016Abstract: The present invention provides methods of using a novel sulfonated resin catalyst, showing improved performance. The catalyst has reduced or partial functionalization, throughout the sulfonated region of the polymer, leading to reduced by-product formation and other desirable features. This catalyst has particular usefulness in reactions or processes sensitive to high acidity, e.g., esterification-transesterification.Type: ApplicationFiled: October 24, 2008Publication date: April 30, 2009Applicant: THE PUROLITE COMPANYInventors: James A. Dale, Luc Froment, Satish Bapat
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Publication number: 20080237133Abstract: The present invention provides a macroporous copolymer having large pores, typically in the range of 5,000-200,000 ? and a typical breaking weight of at least 175 g/bead. The macroporous copolymers can be made using an interpenetrating polymer network (IPN) techniques. These macroporous copolymers may also form macroporous resins. The present invention also provides methods of using the macroporous copolymers and resins.Type: ApplicationFiled: March 26, 2008Publication date: October 2, 2008Applicant: THE PUROLITE COMPANYInventors: James A. Dale, Vladimir Sochilin, Luc Froment
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Publication number: 20080173583Abstract: The present invention provides a new water purification method and system using reverse osmosis. In particular, the present invention provides methods and water purification systems using an ion exchange resin and absorbent media for pretreatment of water being fed to a reverse osmosis treatment system, where the pretreatment reduces fouling of, or deposits or chemical attack on the membrane surfaces and passageways. Particularly, a macroporous resin having an average pore diameter in the range of 1,000 to 500,000 Angstroms and a crush strength or Chatillon value of at least 24 g/bead (710 ?m bead diameter) is used.Type: ApplicationFiled: January 16, 2008Publication date: July 24, 2008Applicant: The Purolite CompanyInventors: Francis Boodoo, Fabio Chaves De Sousa, James A. Dale, Carmen Mihaela Iesan