EP 1024908 A1 20000809 - METHOD AND APPARATUS FOR RECYCLING AN AGGREGATE CONTAMINATED WITH A HYDROCARBON
Title (en)
METHOD AND APPARATUS FOR RECYCLING AN AGGREGATE CONTAMINATED WITH A HYDROCARBON
Title (de)
VERFAHREN UND VORRICHTUNG ZUM RECYCLING EINES MIT EINEM KOHLENWASSERSTOFF VERUNREINIGTEN AGGREGATS
Title (fr)
PROCEDE ET APPAREIL DE RECYCLAGE D'UN AGREGAT CONTAMINE PAR UN HYDROCARBURE
Publication
Application
Priority
- GB 9802934 W 19980929
- GB 9722128 A 19971021
Abstract (en)
[origin: WO9920409A1] The present invention relates to a method and apparatus for recycling an aggregate contaminated with a hydrocarbon. More particularly it relates to a method and apparatus for cleaning ballast, for example, the stone chippings used on railway tracks. It could however be used to clean, for example, pebbles from an oil contaminated beach. The method comprises the steps of: i) subjecting the aggregate to a prewash, ii) solvent washing the aggregate to remove the hydrocarbon contaminant, iii) rinsing the aggregate with water to remove residual solvent containing the hydrocarbon contaminant, iv) separating off the solvent containing the hydrocarbon contaminant and water from the aggregate, and v) recycling the cleaned aggregate. The apparatus comprises: i) means for extracting and/or transferring the aggregate to the apparatus; ii) means for prewashing the aggregate; iii) means for transferring the aggregate to a solvent treatment circuit; iv) means for transferring the aggregate to a water treatment circuit; v) means for transferring the cleaned and decontaminated aggregate for recycling, and vi) means for collecting waste streams from the solvent and water treatment circuits.
IPC 1-7
IPC 8 full level
B03B 5/56 (2006.01); B03B 9/00 (2006.01); B09C 1/02 (2006.01); E01B 27/04 (2006.01)
CPC (source: EP)
B03B 5/56 (2013.01); B03B 9/00 (2013.01); B09C 1/02 (2013.01); E01B 27/04 (2013.01); E01B 2203/025 (2013.01)
Citation (search report)
See references of WO 9920409A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 9920409 A1 19990429; AU 9273298 A 19990510; EP 1024908 A1 20000809; GB 9722128 D0 19971217
DOCDB simple family (application)
GB 9802934 W 19980929; AU 9273298 A 19980929; EP 98945402 A 19980929; GB 9722128 A 19971021