Cleaning and liquid contact with solids – Processes – Including forming a solidified or hardened coating for cleaning
Patent
1979-02-05
1980-08-05
Caroff, Marc L.
Cleaning and liquid contact with solids
Processes
Including forming a solidified or hardened coating for cleaning
134 8, 134 22C, 134 34, B08B 904
Patent
active
042160260
ABSTRACT:
To remove fluid and/or particulate debris from a pipeline, a Bingham plastic fluid plug is passed through a pipeline and the fluid and/or debris are collected by the plug. The plug is pushed through the pipeline with a scraper which in turn may be pushed by liquid or gas pressure. Where the fluid to be removed is water, the Bingham plastic fluid plug employed preferably is a composition of water and a xanthan gum, and the gum may be cross-linked with a multivalent metal. Where the fluid to be removed is a hydrocarbon, the Bingham plastic fluid plug employed preferably is a composition of a mineral oil and an organo-modified smectite, and may also include a particulate filler such as powdered coal.
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Bird et al., Transport Phenomena, 1966, pp. 10-11.
Caroff Marc L.
Shell Oil Company
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