Refrigeration liquid with leak indicator and process of using sa

Details Refrigeration liquid with leak indicator and process of using sa Refrigeration liquid with leak indicator and process of using sa

1981-05-21

1983-01-18

Smith, John D.

Compositions

Vaporization, or expansion, refrigeration or heat or energy...

With lubricants, or warning, stabilizing or anti-corrosion...

62114, 260378, C09K 504

Patent

active

043691200

ABSTRACT:
Compounds of the class represented by 1,4-bis(2-methyl-6-ethylanilino)anthraquinone, 1,4-bis(2,6-dimethylanilino)anthraquinone, and 1,4-bis(2,4,6-trimethylanilino)anthraquinone are disclosed as being unusually stable blue dyes suitable for use as visual leak indicators in refrigerants; e.g., in halocarbon refrigerants, or in refrigeration liquids comprising a halocarbon refrigerant in admixture with a refrigeration oil.

REFERENCES:
patent: 3770640 (1973-11-01), Bartlett
patent: 4083683 (1978-04-01), Botros
patent: 4170564 (1979-10-01), Brendle

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