[专利]
Cleaning fluid
申请号:
2015GB-0011568
申请日:
2015-07-01
公开号:
GB201511568 D0 2015-08-12 [GB201511568]GB2539940 A 2017-01-04 [GB2539940]
公开日:
2015-08-122017-01-04
申请人:
GERMAN SWEDISH & FRENCH CAR PARTS
专利权人:
GERMAN SWEDISH & FRENCH CAR PARTS
IPC:
B01D-041/04;C11D-001/722;C11D-003/075;C11D-003/08;C11D-003/10;C11D-003/28;C11D-003/32
(GB2539940) A cleaning fluid for a filter, comprising a salt, a non-ionic surfactant and a non-flammable solvent. Preferably the salt is sodium carbonate, trisodium phosphate, sodium metasilicate or any combination thereof, the non-ionic surfactant is an ethylene oxide / propylene oxide block copolymer (0.2-10% wt) and the solvent is water. Preferably all three alkali salts are present, their total amount ranging from 1.5 to 30% wt, preferably from 3 to 5%. The fluid may further contain a corrosion inhibitor (0.05-10% wt) which is a mixture of n-oleoyl sarcosine, 2,2-[[(5-methyl-1H-benzotriazol-1-yl)methyl]imino]bisethanol, 2,2-[[(4-methyl-1H-benzotriazol-1-yl)methyl]imino]bisethanol and methanol. A preferred composition consists of 1-2% wt sodium carbonate, 0.25-1.25% wt trisodium phosphate, 0.5-1.5% wt sodium metasilicate, 0.3-1.5% wt EO/PO block copolymer, 0.05-1% wt corrosion inhibitor and water. The filter is preferably a diesel particulate filter like the ones used in automobiles and vans, i.e. a filter for trapping ash or soot carried by the exhaust gases of diesel internal combustion engines, comprising aluminium, magnesium, zinc and/or cadmium. Cleaning is effected after removing the filter from the vehicle, e.g. in a workshop or garage, by immersing it in the detergent solution, preferably for 10-14 hours at a temperature between 15 and 30oC.