Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
110 words
A composition for use in an oxidation-reduction process for effecting the catalytic oxidation of hydrogen sulfide gas which comprises a water soluble ferric iron salt and at least two water soluble iron chelating agents with at least one of said iron chelating agents being selected from a group of amine chelating agents consisting of polyamino polycarboxylic acids, polyamino alkyl polycarboxylic acids, polyamino hydroxyalkyl polycarboxylic acids, and poly(phosphonoalkyl) amines, and their alkali metal salts, and at least one other of said iron chelating agents being selected from the group of polyhydroxy chelating agents consisting of monosaccharides, disaccharides, reduced monosaccharides, reduced disaccharides, monosaccharide acids, and disaccharide acids, and their alkali metal salts.
Claim 2
Dependent Claim
110 words
A composition for use in an oxidation-reduction process for effecting the catalytic oxidation of hydrogen sulfide gas which comprises a water soluble ferric iron salt and at least two water soluble iron chelating agents with at least one of said iron chelating agents being selected from a group of amine chelating agents consisting of polyamino polycarboxylic acids, polyamino alkyl polycarboxylic acids, polyamino hydroxyalkyl polycarboxylic acids, and poly(phosphonoalkyl) amines, and their alkali metal salts, and at least one other of said iron chelating agents being selected from the group of polyhydroxy chelating agents consisting of monosaccharides, disaccharides, reduced monosaccharides, reduced disaccharides, monosaccharide acids, and disaccharide acids, and their alkali metal salts.
Claim 3
Dependent Claim
23 words
A composition as in claim 1, wherein said ferric iron salt and said iron chelating agents are dissolved in an aqueous alkaline solution.
Claim 4
Dependent Claim
29 words
A composition as in claim 1 or 2, wherein said amine chelating agent is a mixture of the sodium salts of ethylenediamine tetra-acetic acid and N-hydroxy ethylenediamine tri-acetic acid.
Claim 5
Dependent Claim
17 words
A composition as in claim 1 or 2, wherein said amine chelating agent is a poly(phosphonoalkyl) amine.
Claim 6
Dependent Claim
15 words
A composition as in claim 1 or 2, wherein said polyhydroxy chelating agent is sorbitol.
Claim 7
Dependent Claim
15 words
A composition as in claim 1 or 2, wherein said polyhydroxy chelating agent is mannitol.
Claim 8
Dependent Claim
20 words
A composition as in claim 1 or 2, wherein said polyhydroxy chelating agent is a mixture comprising sodium-alpha-d-glucoheptonate and sodium-beta-d-glucoheptonate.
Claim 9
Dependent Claim
21 words
A composition as in claim 2, wherein said solution has an iron concentration ranging between about 5 ppm and 5000 ppm.
Claim 10
Dependent Claim
28 words
A composition as in claim 2, wherein said amine chelating agent and iron are present in said solution in a molar ratio ranging between about 0.5:1 and 2:1.
Claim 11
Dependent Claim
40 words
A composition as in claim 2, wherein said amine chelating agent and iron are present in said solution in a molar ratio of about 9.8:1 and the iron concentration of said solution is between about 5 ppm to 5000 ppm.
Claim 12
Dependent Claim
26 words
A composition as in claim 2, wherein said polyhydroxy chelating agent and iron are present in said solution in a molar ratio of at least 0.167:1.
Claim 13
Dependent Claim
40 words
A composition as in claim 2, wherein said polyhydroxy chelating agent and iron are present in said solution in a molar ratio of about 0.8:1 and the iron concentration of said solution is between about 5 ppm to 5000 ppm.
Claim 14
Dependent Claim
20 words
A composition as in claim 2, wherein said solution has a pH between about pH 8 and about pH 10.5.
Claim 15
Dependent Claim
61 words
A method of preparing an alkaline aqueous chelated iron solution for effecting the catalytic oxidation of hydrogen sulfide gas comprising, dissolving a water soluble ferric iron salt in water, adding to said solution at least one amine-type iron chelating agent and at least one polyhydroxy-type iron chelating agent as defined in claim 1, and adding to said solution an alkalizing material.