Global Patent Index - EP 1024908 A1

EP 1024908 A1 2000-08-09 - 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

EP 1024908 A1 (EN)

Application

EP 98945402 A

Priority

  • GB 9802934 W
  • GB 9722128 A

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 (main, further and additional classification)

B09C 1/02; B03B 9/00

IPC 8 full level (invention and additional information)

B03B 5/56 (2006.01); B03B 9/00 (2006.01); B09C 1/02 (2006.01); E01B 27/04 (2006.01)

CPC (invention and additional information)

E01B 27/04 (2013.01); B03B 5/56 (2013.01); B03B 9/00 (2013.01); B09C 1/02 (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

EPO simple patent family

WO 9920409 A1 19990429; AU 9273298 A 19990510; EP 1024908 A1 20000809; GB 9722128 D0 19971217

INPADOC legal status


2003-10-29 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20030325

2001-08-01 [17Q] FIRST EXAMINATION REPORT

- Ref Legal Event Code: 17Q

- Effective date: 20010618

2000-08-09 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20000502

2000-08-09 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE