Polyhalogenated hydrocarbon refrigerants and refrigerant oils colored with fluorescent dyes and method for their use as leak detectors

Claim 2

A leak detectable refrigeration composition comprising: (A) a refrigeration liquid selected from the group consisting of (1) a polyhalogenated hydrocarbon refrigerant selected from the group consisting of trichloromonofluoromethane, dichlorodifluoromethane, monochlorotrifluoromethane, dichloromonofluoroethane, monochlorodifluoromethane, trichlorotrifluoroethane, dichlorotetrafluoroethane,

Claim 3

1,2-trichloro-1,2,2,-trifluoroethane, 1,2-dichloro-1,1,2,2-tetrafluoroethane, 1,1-difluoroethane/dichlorodifluoromethane azeotrope, chloropentafluoroethane/chlorodifluoromethane azeotrope, chlorotrifluoromethane/trifluoromethane azeotrope, bromotrifluoromethane, trifluoromethane, chloropentafluoroethane, difluoromethane/chloropentafluoroethane azeotrope, chloropentafluoroethane/1,1-difluoroethane azeotrope, dichlorodifluoromethane/chlorofluoromethane azeotrope, chlorofluoromethane/1,2-dichlorotetrafluoroethane azeotrope, difluoromethane, 1,2-dibromotetrafluoroethane, 1,1,1-trifluoroethane, 1,1-difluoro-1-chloroethane, 1,1-difluoroethane, bromotrifluoromethane/difluoromethane azeotrope, 1,2-dichlorotetrafluoroethane/dichlorofluoromethane azeotrope, and hexafluoroethane/trifluoromethane azeotrope, (2) a refrigeration oil selected from the group consisting of naphthenic oils, paraffinic oils, alkylated benzenes, silicones, polyglycols, diesters or triesters of dicarboxylic or tricarboxylic acids, and polyalkyl silicate oils, and (3) a mixture of A(1) and A(2) and (B) a fluorescent dye compound or composition comprising the dye selected from the group consisting of (1) a fluorescent dye selected from the group consisting of perylene, naphthoxanthene, monocyclic aromatic compounds having an organometallic compound, (2) a solution of fluorescent dye in a solvent, and (3) a mixture of B(1) and B(2), wherein the fluorescent dye compound or composition is soluble in the refrigeration liquid, the concentration of said dye being at least 0.001 grams per 100 grams of said refrigeration liquid.

Claim 4

1,2-trichloro-1,2,2,-trifluoroethane, 1,2-dichloro-1,1,2,2-tetrafluoroethane, 1,1-difluoroethane/dichlorodifluoromethane azeotrope, chloropentafluoroethane/chlorodifluoromethane azeotrope, chlorotrifluoromethane/trifluoromethane azeotrope, bromotrifluoromethane, trifluoromethane, chloropentafluoroethane, difluoromethane/chloropentafluoroethane azeotrope, chloropentafluoroethane/1,1-difluoroethane azeotrope, dichlorodifluoromethane/chlorofluoromethane azeotrope, chlorofluoromethane/1,2-dichlorotetrafluoroethane azeotrope, difluoromethane, 1,2-dibromotetrafluoroethane, 1,1,1-trifluoroethane, 1,1-difluoro-1-chloroethane, 1,1-difluoroethane, bromotrifluoromethane/difluoromethane azeotrope, 1,2-dichlorotetrafluoroethane/dichlorofluoromethane azeotrope, and hexafluoroethane/trifluoromethane azeotrope, (2) a refrigeration oil selected from the group consisting of naphthenic oils, paraffinic oils, alkylated benzenes, silicones, polyglycols, diesters or triesters of dicarboxylic or tricarboxylic acids, and polyalkyl silicate oils, and (3) a mixture of A(1) and A(2) and (B) a fluorescent dye compound or composition comprising the dye selected from the group consisting of (1) a fluorescent dye selected from the group consisting of perylene, naphthoxanthene, monocyclic aromatic compounds having an organometallic compound, (2) a solution of fluorescent dye in a solvent, and (3) a mixture of B(1) and B(2), wherein the fluorescent dye compound or composition is soluble in the refrigeration liquid, the concentration of said dye being at least 0.001 grams per 100 grams of said refrigeration liquid.

Claim 5

A composition as in claim 1, wherein the polyhalogenated hydrocarbon refrigerant is dichlorodifluoromethane.

Claim 6

A composition as in claim 1, wherein the refrigeration liquid is a refrigeration oil.

Claim 7

A composition as in claim 3, wherein the refrigeration oil is paraffinic.

Claim 8

A composition as in claim 1, wherein the weight ratio of refrigeration oil to polyhalogenated hydrocarbon refrigerant is in the range of from about 1:3 to about 1:100.

Claim 9

A composition as in claim 1, wherein the fluorescent dye is a naphthoxanthene compound.

Claim 10

A composition as in claim 6 wherein the naphthoxanthene compound has the following structure: ##STR2##

Claim 11

A composition as in claim 1, wherein the fluorescent dye is a perylene compound.

Claim 12

A composition as in claim 8, wherein the perylene compound has the following structure: ##STR3##

Claim 13

A composition as in claim 1, wherein the fluorescent dye is dineptho(1,2,3-CD;1',2',3'-1M)perylene-dione, dodecyl derivative, and has the following structure: ##STR4##

Claim 14

A leak detectable refrigeration composition as in claim 1, wherein the refrigeration liquid is dichlorodifluoromethane, the refrigeration oil is napthenic oil, and the fluorescent dye composition is a naphthoxanthene compound dissolved therein.

Claim 15

A refrigeration composition as in claim 11, wherein said naphthoxanthene compound is Naphtho[3,2,1-kl]xanthene 1,8 dimethyl.

Claim 16

A leak detectable refrigeration composition as in claim 1, wherein the refrigeration liquid is dichlorodifluoromethane, and the fluorescent dye composition is a perylene fluorescent dye.

Claim 17

A leak detectable refrigeration composition as in claim 13, wherein the perylene fluorescent dye is dineptho(1,2,3-CD: 1',2',3'-1M)perylene-9,18-dione dodecyl derivative liquid dye.

Claim 18

A leak detectable refrigeration composition as in claim 1, wherein the refrigeration liquid is a mixture of dichlorodifluoromethane and a parafinnic refrigeration oil, and the fluorescent dye is dineptho(1,2,3-CD: 1',2',3'-1M)perylene-9,18-dione dodecyl derivative liquid dye.

Claim 19

A leak detectable refrigeration composition as in claim 1, wherein the refrigeration liquid is selected from the group consisting of a polyhalogenated hydrocarbon refrigerant and a refrigeration oil and the fluorescent dye composition is a monocyclic aromatic compound having an organometallic compound.

Claim 20

A leak detectable refrigeration composition as in claim 12, wherein the naphthenic oil solution having the fluorescent naphthoxanthene compound dissolved therein is combined with the dichlorodifluoromethane in a ratio of about 1 part naphthenic oil solution to about 30 parts dichlorodifluoromethane.

Claim 21

A leak detectable refrigeration composition as in claim 14 wherein the liquid fluorescent perylene compound dye is combined with the dichlorodifluoromethane in a ratio of about 1 part liquid perylene dye to about 100 parts dichlorodifluoromethane.