Cleaning and liquid contact with solids – Processes – Including regeneration – purification – recovery or separation...
Reexamination Certificate
2005-11-29
2005-11-29
El-Arini, Zeinab (Department: 1746)
Cleaning and liquid contact with solids
Processes
Including regeneration, purification, recovery or separation...
C134S013000, C134S021000, C134S025100
Reexamination Certificate
active
06969429
ABSTRACT:
A process for removing an aqueous slurry suspension comprising a blast medium and coating substance residues which produced when cleaning surfaces which have a corrosion protection coating. The process, which is particularly applicable to ships and industrial facilities, involves the steps ofa) suctioning the aqueous slurry suspension by means of an air feed into a receiving tank which has an outside pressure to tank vacuum ratio of more than 1:0.52;b) diluting the suspension with water;c) continuous feeding of the diluted suspension by means of a pump overcoming a height differential>5 meters;d) separating the solids from the water by means of sedimentation in a settling tank; ande) recycling the separated water.Suctioning of the aqueous slurry suspension is by means of air into receiving a tank which has a vacuum of at least 0.5 bar with respect to atmospheric pressure, in combination with a pump which continuously feeds the water-diluted suspension over a height differential>5 meters.
REFERENCES:
patent: 1 004 398 (2000-05-01), None
patent: 09155109 (1997-06-01), None
patent: WO 96/16770 (1996-06-01), None
Greverath Wulf-Dieter
Pöpplau Jens
El-Arini Zeinab
Muhlhan Surface Protection International GmbH
Roberts & Roberts, LLP
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