The Nitrogen Is A Ring Member Patents (Class 516/162)
The compound contains repeating -(ocnh2n)- (i.e., repeating unsubstituted oxyalkylene) (Class 516/163)
  • Demulsifying and dehydrating formulations for heavy crude oils based on block copolymers bifunctionalized with amines
    Patent number: 8815960
    Abstract: The present invention relates to demulsifying and dehydrating formulations of heavy crude oil based block copolymers amine bifunctionalized with low polydispersities. These formulations can contain solvents whose boiling point is in the range from 35 to 200° C., preferably: dichloromethane, chloroform, toluene, xylenes, turbosine, naphtha or mixtures thereof.
    Type: Grant
    Filed: December 10, 2009
    Date of Patent: August 26, 2014
    Assignee: Instituto Mexicano Del Petroleo
    Inventors: Gabriel Cendejas Santana, Eugenio Alejandro Flores Oropeza, Laura Verónica Castro Sotelo, Aristeo Estrada Buendía, Marcelo Lozada y Cassou, Flavio Salvador Vázquez Moreno
  • Synergistic combination of demulsifiers for enhancing demulsification properties in industrial lubricants
    Patent number: 7863339
    Abstract: A synergistic demulsifier composition for the improvement of demulsification properties and method of making said composition is disclosed along with a lubricant composition containing same. The demulsifier composition consists of effective amounts of one or more demulsifier additives and one or more dispersants. The demulsifier additives consist of a first copolymer of propylene oxide and ethylene oxide and a second copolymer of propylene oxide and ethylene oxide. The dispersant can be an untreated polyalkene succinimide type dispersant, preferably an untreated polyisobutylene succinimide type dispersant.
    Type: Grant
    Filed: April 30, 2010
    Date of Patent: January 4, 2011
    Assignee: ExxonMobil Research and Engineering Company
    Inventor: David G. L. Holt
  • Synergistic combination of demulsifiers for enhancing demulsification properties in industrial lubricants
    Patent number: 7816414
    Abstract: A synergistic demulsifier composition for the improvement of demulsification properties and method of making said composition is disclosed along with a lubricant composition containing same. The demulsifier composition consists of effective amounts of one or more demulsifier additives and one or more dispersants. The demulsifier additives consist of a first copolymer of propylene oxide and ethylene oxide and a second copolymer of propylene oxide and ethylene oxide. The dispersant can be an untreated polyalkene succinimide type dispersant, preferably an untreated polyisobutylene succinimide type dispersant.
    Type: Grant
    Filed: August 11, 2006
    Date of Patent: October 19, 2010
    Assignee: ExxonMobil Research and Engineering Company
    Inventor: David G. L. Holt
  • Synergistic combination of demulsifiers for enhancing demulsification properties in industrial lubricants
    Publication number: 20080039537
    Abstract: A synergistic demulsifier composition for the improvement of demulsification properties and method of making said composition is disclosed along with a lubricant composition containing same. The demulsifier composition consists of effective amounts of one or more demulsifier additives and one or more dispersants. The demulsifier additives consist of a first copolymer of propylene oxide and ethylene oxide and a second copolymer of propylene oxide and ethylene oxide. The dispersant can be an untreated polyalkene succinimide type dispersant, preferably an untreated polyisobutylene succinimide type dispersant.
    Type: Application
    Filed: August 11, 2006
    Publication date: February 14, 2008
    Inventor: David G. L. Holt
  • Concentrated aqueous dispersions of water-soluble polymers
    Patent number: 6174950
    Abstract: Concentrated and low viscosity aqueous dispersions, e.g., opaque emulsions, well suited as flocculants for water treatment, comprise the water-soluble polymerizate of at least one water-soluble hydrophilic monomer A, optionally, at least one amphiphilic comonomer B and/or, also optionally, at least one hydrophobic comonomer C, in the presence of at least one polymeric dispersant incompatible therewith, for example an imidized and salified styrene/maleic anhydride copolymer or poly(diallyldimethylammonium chloride).
    Type: Grant
    Filed: January 26, 1998
    Date of Patent: January 16, 2001
    Assignee: Elf Atochem S.A.
    Inventors: Denis Tembou Nzudie, Didier Vanhoye
  • Solid-liquid separation using phase transitional N-substituted pyrrolidones
    Patent number: 6051143
    Abstract: A process is disclosed for flocculating particles in a liquid suspension by mixing the suspension with a pyrrolidone having alkyl, alkenyl, aryl, alkylaryl, and arylalkyl radicals from 1 to 18 carbon atoms to form a mixture at a temperature above a minimum flocculation temperature for the mixture.
    Type: Grant
    Filed: November 14, 1997
    Date of Patent: April 18, 2000
    Assignee: The Trustees of Columbia University in the City of New York
    Inventors: Ponisseril Somasundaran, Maltesh Chidambaram, Brian A. Pethica, Xiang Yu, Anjing Lou