Patent US5525516A successfully refreshed from Google Patents.
← Back to Patent Explorer
US5525516A Expired / Lapsed US ⏱️ 0.0 years remaining

Method for tagging petroleum products

Assignee: Authentix Inc
•
Filing: 1994-09-30
•
Granted: 1996-06-11
•
Expires: 2014-09-30
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract This invention provides a method for imparting invisible markings for identification purposes to petroleum hydrocarbons by incorporating one or more infrared fluorescing compounds therein. Certain infrared fluorophores from the classes of squaraines (derived from squaric acid), phthalocyanines and naphthalocyanines are useful in providing invisibly marked petroleum hydrocarbons such as crude oil, lubricating oils, waxes, gas oil (furnace oil), diesel oil, kerosene and in particular gasoline. The near infrared fluorophores are added to the hydrocarbons at extremely low levels and are detected by exposing the marked hydrocarbon compositions to near infrared radiation having a wavelength in the 670-850 nm range and then detecting the emitted fluorescent light via near infrared light detection means.

Inventors

  • 👤 James J. Krutak
  • 👤 Michael R. Cushman
  • 👤 Max A. Weaver

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 20:30
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/003; C10L1/10; C10L1/14; C10L1/22; C10L1/232; C10L1/24; C10L1/28; C10L1/30; C10L1/301; C10M; C10M171/00; C10M171/007; G; G01; G01N; G01N33/00; G01N33/26; G01N33/28; G01N33/2835; G01N33/2882; C10L1/233; C10L1/2406; C10L1/2412; C10L1/2418; C10L1/2431; C10L1/2437; C10L1/2443; C10L1/245; C10L1/2456; C10L1/305; C10L1/308; Y; Y10; Y10T; Y10T436/00; Y10T436/13

Claims Analysis

Total Claims: 35
Claim 1
Independent Claim 53 words
A method for tagging a petroleum hydrocarbon for identification purposes, which comprises dissolving at ambient temperature in said hydrocarbon a near infrared fluorophoric compound selected from the group consisting of squaraines phthalocyanines and naphthalocyanines having at least one straight or branched chain C 4 to C 20 alkyl group, and croconic acid derivatives.
Claim 2
Independent Claim 53 words
A method for tagging a petroleum hydrocarbon for identification purposes, which comprises dissolving at ambient temperature in said hydrocarbon a near infrared fluorophoric compound selected from the group consisting of squaraines phthalocyanines and naphthalocyanines having at least one straight or branched chain C 4 to C 20 alkyl group, and croconic acid derivatives.
Claim 3
Dependent Claim 11 words
The method of claim 1, wherein the petroleum hydrocarbon is gasoline.
Claim 4
Dependent Claim 11 words
The method of claim 1, wherein the petroleum hydrocarbon is kerosene.
Claim 5
Dependent Claim 12 words
The method of claim 1, wherein the petroleum hydrocarbon is lubricant oil.
Claim 6
Dependent Claim 12 words
The method of claim 1, wherein the petroleum hydrocarbon is furnace oil.
Claim 7
Dependent Claim 425 words
The method of claim 1, wherein the near infrared fluorophoric compound is selected from the group consisting of phthalocyanines, 2,3-naphthalocyanines, squaraines and croconic acid derivatives and correspond to Formulae I, II, III, and IV, respectively: ##STR42## wherein Pc and Nc represent the phthalocyanine and naphthalocyanine moieties of Formulae Ia and IIa, ##STR43## respectively, covalently bonded to hydrogen or to halometals, organometallic groups, and oxymetals selected from the group consisting of AlCl, AlBr, AlF, AlOR 5 , AlSR 5 , SICl 2 , SiF 2 , Si(OR 6 ) 2 , Si(SR 6 ) 2 , Zn and Mg, wherein R 5 and R 6 are selected from hydrogen, alkyl, aryl, heteroaryl, alkanoyl, arylcarbonyl, arylaminocarbonyl, trifluoroacetyl, ##STR44## wherein R 7 , R 8 and R 9 are independently selected from alkyl, phenyl or phenyl substituted with alkyl, alkoxy or halogen; X is selected from oxygen, sulfur, selenium, tellurium or a group of the formula N--R 10 , wherein R 10 is hydrogen, cycloalkyl, alkyl, acyl, alkylsulfonyl, or aryl or R 10 and R taken together form an aliphatic or aromatic ring with the nitrogen atom to which they are attached; Y is selected from alkyl, aryl, heteroaryl, halogen or hydrogen; R is selected from hydrogen, unsubstituted or substituted alkyl, alkenyl, alkynyl, C 3 -C 8 cycloalkyl, aryl, heteroaryl, alkylene ##STR45## or alkylene ##STR46## --(X-R) m is one or more groups selected from alkylsulfonylamino, arylsulfonylamino, or a group selected from the formulae --X(C 2 H 4 O) z R, ##STR47## wherein R is as defined above; Z is an integer of from 1-4; or two --(X-R) m groups can be taken together to form divalent substituents of the formula ##STR48## wherein each X 1 is independently selected from --O--, --S--, or --N--R 10 and A is selected from ethylene; propylene; trimethylene; and such groups substituted with lower alkyl, lower alkoxy, aryl and cycloalkyl; 1,2-phenylene and 1,2-phenylene containing 1-3 substituents selected from lower aklyl, lower alkoxy or halogen; R' and R" are independently selected from lower alkyl and cycloalkyl; R 1 and R 2 are independently selected from hydrogen, alkyl, alkoxy, halogen, aryloxy, alkylthio, arylthio, alkylsulfonyl, arylsulfonyl, alkyl-sulfonylamino, arylsulfonylamino, cycloalkylsulfonylamino, unsubstituted and substituted carbamoyl and sulfamyl, alkoxycarbonyl, cycloalkoxycarbonyl, alkanoyloxy, ##STR49## R 3 and R 4 are independently selected from hydrogen, lower alkyl, alkenyl or aryl; n is an integer from 0-16; n 1 is an integer from 0-24, m is an integer from 0-16; and m 1 is an integer from 0-24; provided that the sums of n+m and n 1 +m 1 are 16 and 24, respectively.
Claim 8
Dependent Claim 28 words
The method of claim 6, wherein the near infrared fluorescing compound is a squaraine compound of Formula III, and wherein R 1 and R 2 are independently alkoxycarbonyl.
Claim 9
Dependent Claim 71 words
The method of claim 6, wherein the near infrared fluorescing compound is a 2,3-naphthalocyanine compound of Formula II, and wherein the naphthalocyanine moiety is bonded to hydrogen, AlCl, AlOH, AlOR 5 , SICl 2 , Si(OH) 2 , Si(OR 6 ) 2 , Zn or Mg, m 1 is 0, Y is alkyl and n 1 is 24 and wherein the Y groups represent at least four alkyl or aryl groups.
Claim 10
Dependent Claim 16 words
The method of claim 6, wherein the naphthalocyanine compound of Formula II is bonded to hydrogen.
Claim 11
Dependent Claim 69 words
The method of claim 6, wherein the near infrared fluorescing compound is a phthalocyanine compound of Formula I, and wherein X is oxygen, R is aryl or alkyl, Y is hydrogen, m is 4, and n is 12; and wherein the phthalocyanine moiety is bonded to hydrogen, AlCl, AlOH, AlOCOCF 3 , AlOR 5 , SICl 2 , Si(OH) 2 , Si(OR 6 ) 2 , Zn or Mg.
Claim 12
Dependent Claim 16 words
The method of claim 6, wherein the phthalocyanine compound of Formula I is bonded to hydrogen.
Claim 13
Independent Claim 131 words
A method for identifying a petroleum hydrocarbon, wherein said product has one or more near infrared fluorophoric compounds dissolved therein, which comprises the steps: (a) exposure of a petroleum hydrocarbon composition to electromagnetic radiation having wavelengths of 670-850 nm, wherein said petroleum hydrocarbon composition comprises a petroleum hydrocarbon material having dissolved therein one or more near infrared fluorescent tagging compounds selected from the group consisting of squaraines, phthalocyanines and naphthalocyanines having at least one straight or branched chain C 4 to C 20 alkyl group and croconic acid derivatives, wherein said tagging compound(s) is (are) present in a concentration sufficient to impart detectable fluorescence when exposed to electromagnetic radiation of about 670-850 nm provided by light sources; followed by (b) detection of the emitted fluorescent radiation by near infrared detection means.
Claim 14
Independent Claim 131 words
A method for identifying a petroleum hydrocarbon, wherein said product has one or more near infrared fluorophoric compounds dissolved therein, which comprises the steps: (a) exposure of a petroleum hydrocarbon composition to electromagnetic radiation having wavelengths of 670-850 nm, wherein said petroleum hydrocarbon composition comprises a petroleum hydrocarbon material having dissolved therein one or more near infrared fluorescent tagging compounds selected from the group consisting of squaraines, phthalocyanines and naphthalocyanines having at least one straight or branched chain C 4 to C 20 alkyl group and croconic acid derivatives, wherein said tagging compound(s) is (are) present in a concentration sufficient to impart detectable fluorescence when exposed to electromagnetic radiation of about 670-850 nm provided by light sources; followed by (b) detection of the emitted fluorescent radiation by near infrared detection means.
Claim 15
Dependent Claim 12 words
The method of claim 12, wherein the petroleum hydrocarbon material is gasoline.
Claim 16
Dependent Claim 12 words
The method of claim 12, wherein the petroleum hydrocarbon material is kerosene.
Claim 17
Dependent Claim 13 words
The method of claim 12, wherein the petroleum hydrocarbon material is lubricant oil.
Claim 18
Dependent Claim 13 words
The method of claim 12, wherein the petroleum hydrocarbon material is furnace oil.
Claim 19
Dependent Claim 426 words
The method of claim 12, wherein the near infrared fluorophoric compound is selected from the group consisting of phthalocyanines, 2,3-naphthalocyanines, squaraines and croconic acid derivatives and correspond to Formulae I, II, III, and IV, respectively: ##STR50## wherein Pc and Nc represent the phthalocyanine and naphthalocyanine moieties of Formulae Ia and IIa, ##STR51## respectively, covalently bonded to hydrogen or to halometals, organometallic groups, and oxymetals selected from the group consisting of AlCl, AlBr, AlF, AlOR 5 , AlSR 5 , SiCl 2 , SiF 2 , Si(OR 6 ) 2 , Si(SR 6 ) 2 , Zn and Mg, wherein R 5 and R 6 are selected from hydrogen, alkyl, aryl, heteroaryl, alkanoyl, arylcarbonyl, arylaminocarbonyl, trifluoroacetyl, ##STR52## groups of the formulae ##STR53## wherein R 7 , R 8 and R 9 are independently selected from alkyl, phenyl or phenyl substituted with alkyl, alkoxy or halogen; X is selected from oxygen, sulfur, selenium, tellurium or a group of the formula N-R 10 , wherein R 10 is hydrogen, cycloalkyl, alkyl, acyl, alkylsulfonyl, or aryl or R 10 and R taken together form an aliphatic or aromatic ring with the nitrogen atom to which they are attached; Y is selected from alkyl, aryl, heteroaryl, halogen or hydrogen; R is selected from hydrogen, unsubstituted or substituted alkyl, alkenyl, alkynyl, C 3 -C 8 cycloalkyl, aryl, heteroaryl, alkylene ##STR54## --(X-R) m is one or more groups selected from alkylsulfonylamino, arylsulfonylamino, or a group selected from the formulae --X(C 2 H 4 O) z R, ##STR55## wherein R is as defined above; Z is an integer of from 1-4; or two --(X-R) m groups can be taken together to form divalent substituents of the formula ##STR56## wherein each X 1 is independently selected from --O--, --S--, or --N-R 10 and A is selected from ethylene; propylene; trimethylene; and such groups substituted with lower alkyl, lower alkoxy, aryl and cycloalkyl; 1,2-phenylene and 1,2-phenylene containing 1-3 substituents selected from lower aklyl, lower alkoxy or halogen; R' and R" are independently selected from lower alkyl and cycloalkyl; R 1 and R 2 are independently selected from hydrogen, alkyl, alkoxy, halogen, aryloxy, alkylthio, arylthio, alkylsulfonyl, arylsulfonyl, alkyl-sulfonylamino, arylsulfonylamino, cycloalkylsulfonylamino, unsubstituted and substituted carbamoyl and sulfamyl, alkoxycarbonyl, cycloalkoxycarbonyl, alkanoyloxy, ##STR57## R 3 and R 4 are independently selected from hydrogen, lower alkyl, alkenyl or aryl; n is an integer from 0-16; n 1 is an integer from 0-24, m is an integer from 0-16; m 1 is an integer from 0-24; provided that the sums of n+m and n 1 +m 1 are 16 and 24, respectively.
Claim 20
Dependent Claim 28 words
The method of claim 17, wherein the near infrared fluorescing compound is a squaraine compound of Formula III, and wherein R 1 and R 2 are independently alkoxycarbonyl.
Claim 21
Dependent Claim 71 words
The method of claim 17, wherein the near infrared fluorescing compound is a 2,3-naphthalocyanine compound of Formula II, and wherein the naphthalocyanine moiety is bonded to hydrogen, AlCl, AlOH, AlOR 5 , SiCl 2 , Si(OH) 2 , Si(OR 6 ) 2 , Zn or Mg, m 1 is 0, Y is alkyl and n 1 is 24 and wherein the Y groups represent at least four alkyl or aryl groups.
Claim 22
Dependent Claim 16 words
The method of claim 17, wherein the naphthalocyanine compound of Formula II is bonded to hydrogen.
Claim 23
Dependent Claim 69 words
The method of claim 17, wherein the near infrared fluorescing compound is a phthalocyanine compound of Formula I, and wherein X is oxygen, R is aryl or alkyl, Y is hydrogen, m is 4, and n is 12; and wherein the phthalocyanine moiety is bonded to hydrogen, AlCl, AlOH, AlOCOCF 3 , AlOR 5 , SiCl 2 , Si(OH) 2 , Si(OR 6 ) 2 , Zn or Mg.
Claim 24
Dependent Claim 16 words
The method of claim 17, wherein the phthalocyanine compound of Formula I is bonded to hydrogen.
Claim 25
Dependent Claim 42 words
A petroleum hydrocarbon having dissolved therein at least one near infrared fluorophoric compound selected from the group consisting of squaraines, phthalocyanines and naphthalocyanines having at least one straight or branched chain C 4 to C 20 alkyl group, and croconic acid derivatives.
Claim 26
Dependent Claim 42 words
A petroleum hydrocarbon having dissolved therein at least one near infrared fluorophoric compound selected from the group consisting of squaraines, phthalocyanines and naphthalocyanines having at least one straight or branched chain C 4 to C 20 alkyl group, and croconic acid derivatives.
Claim 27
Dependent Claim 430 words
The petroleum hydrocarbon of claim 23, wherein the near infrared fluorophoric compound is selected from the group consisting of phthalocyanines, 2,3-naphthalocyanines squaraines (squaric acid derivatives) and croconic acid derivatives and correspond to Formulae I, II, III, and IV, respectively: ##STR58## wherein Pc and Nc represent the phthalocyanine and naphthalocyanine moieties of Formulae Ia and IIa, ##STR59## respectively, covalently bonded to hydrogen or to halometals, organometallic groups, and oxymetals selected from the group consisting of AlCl, AlBr, AlF, AlOR 5 , AlSR 5 , SiCl 2 , SiF 2 , Si(OR 6 ) 2 , Si(SR 6 ) 2 , Zn and Mg, wherein R 5 and R 6 are selected from hydrogen, alkyl, aryl, heteroaryl, alkanoyl, arylcarbonyl, arylaminocarbonyl, trifluoroacetyl, ##STR60## groups of the formulae ##STR61## wherein R 7 , R 8 and R 9 are independently selected from alkyl, phenyl or phenyl substituted with alkyl, alkoxy or halogen; X is selected from oxygen, sulfur, selenium, tellurium or a group of the formula N-R 10 , wherein R 10 is hydrogen, cycloalkyl, alkyl, acyl, alkylsulfonyl, or aryl or R 10 and R taken together form an aliphatic or aromatic ring with the nitrogen atom to which they are attached; Y is selected from alkyl, aryl, heteroaryl, halogen or hydrogen; R is selected from hydrogen, unsubstituted or substituted alkyl, alkenyl, alkynyl, C 3 -C 8 cycloalkyl, aryl, heteroaryl, alkylene ##STR62## --(X-R) m is one or more groups selected from alkylsulfonylamino, arylsulfonylamino, or a group selected from the formulae --X(C 2 H 4 O) z R, ##STR63## wherein R is as defined above; Z is an integer of from 1-4; or two --(X-R) m groups can be taken together to form divalent substituents of the formula ##STR64## wherein each X 1 is independently selected from --O--, --S--, or --N-R 10 and A is selected from ethylene; propylene; trimethylene; and such groups substituted with lower alkyl, lower alkoxy, aryl and cycloalkyl; 1,2-phenylene and 1,2-phenylene containing 1-3 substituents selected from lower aklyl, lower alkoxy or halogen; R' and R" are independently selected from lower alkyl and cycloalkyl; R 1 and R 2 are independently selected from hydrogen, alkyl, alkoxy, halogen, aryloxy, alkylthio, arylthio, alkylsulfonyl, arylsulfonyl, alkylsulfonylamino, arylsulfonylamino, cycloalkylsulfonylamino, unsubstituted and substituted carbamoyl and sulfamyl, alkoxycarbonyl, cycloalkoxycarbonyl, alkanoyloxy, ##STR65## R 3 and R 4 are independently selected from hydrogen, lower alkyl, alkenyl or aryl; n is an integer from 0-16; n 1 is an integer from 0-24, m is an integer from 0-16; m 1 is an integer from 0-24; provided that the sums of n+m and n 1 +m 1 are 16 and 24, respectively.
Claim 28
Dependent Claim 29 words
The petroleum hydrocarbon of claim 23, wherein the near infrared fluorescing compound is a squaraine compound of Formula III, and wherein R 1 and R 2 are independently alkoxycarbonyl.
Claim 29
Dependent Claim 72 words
The petroleum hydrocarbon of claim 23, wherein the near infrared fluorescing compound is a 2,3-naphthalo-cyanine compound of Formula II, and wherein the naphthalocyanine moiety is bonded to hydrogen, AlCl, AlOH, AlOR 5 , SiCl 2 , Si(OH) 2 , Si(OR 6 ) 2 , Zn or Mg, m 1 is 0, Y is alkyl and n 1 is 24 and wherein the Y groups represent at least four alkyl or aryl groups.
Claim 30
Dependent Claim 17 words
The petroleum hydrocarbon of claim 24, wherein the naphthalocyanine compound of Formula II is bonded to hydrogen.
Claim 31
Dependent Claim 70 words
The petroleum hydrocarbon of claim 24, wherein the near infrared fluorescing compound is a phthalocyanine compound of Formula I, and wherein X is oxygen, R is aryl or alkyl, Y is hydrogen, m is 4, and n is 12; and wherein the phthalocyanine moiety is bonded to hydrogen, AlCl, AlOH, AlOCOCF 3 , AlOR 5 , SiCl 2 , Si(OH) 2 , Si(OR 6 ) 2 , Zn or Mg.
Claim 32
Dependent Claim 17 words
The petroleum hydrocarbon of claim 24, wherein the phthalocyanine compound of Formula I is bonded to hydrogen.
Claim 33
Dependent Claim 142 words
The petroleum hydrocarbon of claim 24, wherein the near infrared fluorescing compound is selected from the group consisting of 1(4) , 8(11) , 15(18) , 22(25)-tetra[4(2-ethylhexyloxycarbonyl)phenylthio]PcH 2 ; 2(3), 9(10), 16(17), 23(24)-Tetra-(4-nonylphenoxy)PcH 2 ; 2(3), 9(10), 16(17), 23(24)-Tetra-(4-isoamylphenylthio)-PcZn; 2(3), 9(10), 16(17), 23(24)-tetra(2-ethylhexylamino)PcH 2 ; 2(3), 9(10), 16(17), 23(24)-tetra(3,5-di-t-butylphenoxy)PcH 2 ; 2(3), 9(10), 16(17), 23(24)-tetra[4-(carbo-2-ethylhexyloxy)phenoxy]PcH 2 ; 2(3), 9(10), 16(17), 23(24)-tetra (3-pentadecylphenoxy)-PcH 2 ; 2(3), 11(12), 20(21), 29(30)-tetra-t-butyl-NcH 2 ; 2(3), 11(12), 20(21), 29(30)-tetraactyl-NcH 2 ; and 2(3), 11(12), 20(21), 29(30)-tetra-t-butyl-NcZn; 1, 4, 8, 11, 15, 18, 22, 25-octabutoxy-PcH 2 ; 2(3), 9(10), 16(17), 23(24)-tetra(phenylthio)pcH 2 ; 2(3), 9(10), 16(17), 23(24)-tetra(4-t-butylphenylthio)pcH 2 ; 5, 9, 14, 18, 23, 27, 32, 36-octabutoxy-NcH 2 ; 5(36), 14(9), 23(18), 32(27)-tetra(4-t-butylphenyl)-3(2), 12(11), 21(20), 30(29)-tetra-t-butyl-NcH 2 ; 5(36), 14(9), 23(18), 32(27)-tetra-[4-(2-ethylhexylamino)phenyl]-3(2), 12(11), 21(20), 30(29)-tetra-(2-ethylhexylamino)NcH 2 ; wherein Pc is a phthalocyanine moiety and Nc is a naphthalocyanine moiety.
Claim 34
Dependent Claim 25 words
The petroleum hydrocarbon of claim 24 wherein the near infrared fluorescing compound is 2(3), 11(12), 20(21), 29(30)-tetra-t-butyl-NcH 2 , wherein Nc is a naphthalocyanine moiety.
Claim 35
Dependent Claim 14 words
The petroleum hydrocarbon of claim 23, wherein the near infrared flurophoric compound is non-metallated.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1999-06-11 1999-12-11 2000-06-11 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2003-06-11 2003-12-11 2004-06-11 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2007-06-11 2007-12-11 2008-06-11 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag