CRUDE OIL DISPERSION STABILIZER CONTAINING VINYL-ALCOHOL-BASED POLYMER

A dispersion stabilizer for crude oils which contains a vinyl-alcohol-based polymer, characterized in that the vinyl-alcohol-based polymer has a degree of saponification greater than 70 mol% but not greater than 82 mol% and has a total content of carboxyl groups and lactone rings of 0.02-1 mol% with...

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Bibliographische Detailangaben
Hauptverfasser:	KANESHIMA, TAKUMA, KUMAKI, YOSUKE
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ADHESIVES CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS DYES MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS ORGANIC MACROMOLECULAR COMPOUNDS PAINTS POLISHES THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:	A dispersion stabilizer for crude oils which contains a vinyl-alcohol-based polymer, characterized in that the vinyl-alcohol-based polymer has a degree of saponification greater than 70 mol% but not greater than 82 mol% and has a total content of carboxyl groups and lactone rings of 0.02-1 mol% with respect to all the constituent units of the vinyl-alcohol-based polymer. Thus, a dispersion stabilizer for crude oils is provided with which it is possible to disperse or emulsify a high-viscosity crude oil to thereby lower the viscosity and to make the obtained crude-oil dispersion or emulsion present stably for a long time. Cette invention concerne un stabilisant de dispersion pour huiles brutes, caractérisé en ce que le polymère à base d'alcool vinylique a un degré de saponification supérieur à 70 % en mol mais inférieur ou égal à 82 % en mol et a une teneur totale en groupes carboxyle et cycles lactone de 0,02 à 1 % en mol par rapport à tous les motifs constitutifs du polymère à base d'alcool vinylique. Le stabilisant de dispersion pour huiles brutes selon l'invention permet par conséquent de disperser ou d'émulsifier une huile brute à haute viscosité pour abaisser ainsi sa viscosité et stabiliser la dispersion ou l'émulsion d'huile brute obtenue pendant longtemps.