Method of regenerating a glycol-ether type inspection penetrant

Details Method of regenerating a glycol-ether type inspection penetrant Method of regenerating a glycol-ether type inspection penetrant

1976-10-26

1977-07-26

Bashore, S. Leon

Measuring and testing

Surface and cutting edge testing

134 10, 134 12, G01N 1902

Patent

active

040374661

ABSTRACT:
Water solutions of certain glycol-ether materials having resistance to extraction by halocarbon extraction solvents are used as solvent removers in an inspection penetrant process. Used solvent remover containing dissolved penetrant material and dyes is bubbled through a column of halocarbon solvent liquid, whereby the oily penetrant and dyes are selectively extracted leaving the glycol-ether/water mixture in a re-usable condition, the concentration of the glycol-ether in water remaining unchanged. Only a few glycol-ether liquids have been found to have the ability to resist extraction from their water solutions, and these substances are specified for use in the process of inspection penetrant usage, recovery and regeneration.

REFERENCES:
patent: 3558882 (1971-01-01), Mlot-Fijalkowski
patent: 3751970 (1973-08-01), Alburger
patent: 3764265 (1973-10-01), Mlot-Fijalkowski
patent: 3926044 (1975-12-01), Alburger

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