Alkylene oxide esters of lignin sulfonic acid

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dc.contributor.assigneeVirginia Tech Intellectual Properties, Inc.en
dc.contributor.inventorGlasser, Wolfgang G.en
dc.contributor.inventorDhara, Kaliprasannaen
dc.date.accessed2016-08-19en
dc.date.accessioned2016-08-24T17:55:01Zen
dc.date.available2016-08-24T17:55:01Zen
dc.date.filed1990-04-11en
dc.date.issued1992-04-07en
dc.description.abstractLignin sulfonates are converted into sulfonic acid esters by blocking free phenolic hydroxyl groups on the lignin sulfonates from reaction with a suitable protective group, subjecting the blocked lignin sulfonate in aqueous solution to ion exchange to produce the free sulfonic acid thereof, exchanging the aqueous solvent into a polar organic solvent, such as isopropanol, and reacting the sulfonic acid derivative in the polar organic solvent with a saturated or unsaturated aliphatic epoxide, preferably an alkylene oxide. The resulting sulfonic acid ester adduct may be isolated and purified from the reactants using solvent extraction. Lignin sulfonic acid ester adducts are produced that are soluble in a variety of organic solvents and insoluble in water.en
dc.format.mimetypeapplication/pdfen
dc.identifier.applicationnumber7507560en
dc.identifier.patentnumber5102991en
dc.identifier.urihttp://hdl.handle.net/10919/72652en
dc.identifier.urlhttp://pimg-fpiw.uspto.gov/fdd/91/029/051/0.pdfen
dc.language.isoen_USen
dc.publisherUnited States Patent and Trademark Officeen
dc.subject.cpcC08H6/00en
dc.subject.uspc530/500en
dc.subject.uspcother530/502en
dc.subject.uspcother530/507en
dc.titleAlkylene oxide esters of lignin sulfonic aciden
dc.typePatenten
dc.type.dcmitypeTexten
dc.type.patenttypeutilityen

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