Process for the separation of hollow glass microspheres from...

Details Process for the separation of hollow glass microspheres from... Process for the separation of hollow glass microspheres from...

2006-02-28

2006-02-28

Walsh, Donald (Department: 3653)

Classifying, separating, and assorting solids

Fluid suspension

Liquid

C209S710000, C209S711000, C209S724000, C428S402000, C428S406000

Reexamination Certificate

active

07004333

ABSTRACT:
Process for recovering at least 70% of hollow glass microspheres having an average diameter, according to the ASTM D1214-1989, ranging from 5 to 200 μm contained in a mixture of drilling mud and cuttings which comprises: a) screening, if necessary, the mixture through one or more 5 to 20 mesh sieves; b) feeding the screened mixture to one or more cyclones and/or hydrocyclones arranged in series, each of which is fed with a volume flow-rate from 1.5 to 10 times higher than the maximum nominal operating value.

REFERENCES:
patent: 2978340 (1961-04-01), Alford et al.
patent: 3035042 (1962-05-01), Hoyt
patent: 4252193 (1981-02-01), Powers et al.
patent: 4370166 (1983-01-01), Powers et al.
patent: 0 565 187 (1993-10-01), None

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