EP 2346971 A1 20110727 - METHOD FOR REMOVING CORROSIVE SULFUR COMPOUNDS FROM A TRANSFORMER OIL
Title (en)
METHOD FOR REMOVING CORROSIVE SULFUR COMPOUNDS FROM A TRANSFORMER OIL
Title (de)
VERFAHREN ZUM ENTFERNEN KORROSIVER SCHWEFELVERBINDUNGEN AUS EINEM TRANSFORMATORÖL
Title (fr)
PROCÉDÉ POUR ÉLIMINER DES COMPOSÉS DE SOUFRE CORROSIFS D'UNE HUILE DE TRANSFORMATEUR
Publication
Application
Priority
EP 2008008985 W 20081020
Abstract (en)
[origin: WO2010045958A1] The invention relates to a method for removing corrosive sulfur compounds from a transformer oil. By adding a mixture of rare earths comprising aluminum oxide and aluminum silicate to the transformer oil, and enriching the same with an aqueous solution of soluble metal salts, the corrosive sulfur compounds in transformer oil are neutralized with defined heating and cooling phases. The advantage of said method is that no additional chemical components, such as passivators, are added to the transformer oil. When using a tank for receiving the mixture of the rare earths comprising aluminum oxide and aluminum silicate, the reaction can run in the tank. Any aging products that may be present, and the bonded corrosive sulfur compounds are effectively retained within the tank by means of a filter system, and can be disposed of with the tank.
IPC 8 full level
C10M 175/00 (2006.01); C10G 25/00 (2006.01); C10G 29/06 (2006.01); C10M 177/00 (2006.01)
CPC (source: EP US)
C10G 25/006 (2013.01 - EP US); C10M 175/0008 (2013.01 - EP US); C10M 175/0025 (2013.01 - EP US); C10M 175/0058 (2013.01 - EP US); C10M 177/00 (2013.01 - EP US)
Citation (search report)
See references of WO 2010045958A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA MK RS
DOCDB simple family (publication)
WO 2010045958 A1 20100429; BR PI0823168 A2 20150623; CA 2740998 A1 20100429; CN 102186959 A 20110914; EP 2346971 A1 20110727; US 2011220552 A1 20110915
DOCDB simple family (application)
EP 2008008985 W 20081020; BR PI0823168 A 20081020; CA 2740998 A 20081020; CN 200880131624 A 20081020; EP 08874989 A 20081020; US 200813125128 A 20081020