US4171405A
Expired / Lapsed
US
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Asbestos treatment with metal molybdates
Assignee: Dow Chemical Co
•
Filing: 1977-01-03
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Granted: 1979-10-16
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Expires: 1997-01-03
Abstract
Abstract A method of treating asbestos comprising depositing on at least a portion of the asbestos a material consisting essentially of at least one metal molybdate.
Inventors
- 👤 Paul A. Pezzoli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:22
CPC Classifications
C; C04; C04B; C04B20/00; C04B20/10; C04B20/1055; C03; C03C; C03C25/00; C03C25/10; C03C25/42; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2904; Y10T428/2907; Y10T428/2913; Y10T428/2933; Y10T428/2938; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/31504; Y10T428/31652
Claims Analysis
Total Claims: 51
Claim 1
Independent Claim
48 words
A method of treating asbestos to reduce its hemolytic activity comprising depositing on at least a portion of the asbestos a material consisting essentially of at least one hemolysis-reducing metal molybdate in an amount of 0.5 to 5.0 percent by weight, based on the weight of the asbestos.
Claim 2
Independent Claim
48 words
A method of treating asbestos to reduce its hemolytic activity comprising depositing on at least a portion of the asbestos a material consisting essentially of at least one hemolysis-reducing metal molybdate in an amount of 0.5 to 5.0 percent by weight, based on the weight of the asbestos.
Claim 3
Dependent Claim
39 words
The method of claim 1 wherein the metal is selected from the group consisting of alkali metals, alkaline earth metals, first series transition metals, second series transition metals, group II B metals, group III metals, and group IV metals.
Claim 4
Dependent Claim
11 words
The method of claim 2 wherein the alkali metal is sodium.
Claim 5
Dependent Claim
21 words
The method of claim 2 wherein the alkaline earth metal is selected from the group consisting of magnesium, calcium, and barium.
Claim 6
Dependent Claim
31 words
The method of claim 2 wherein the first series transition metal is selected from the group consisting of titanium (III), titanium (IV), chromium, manganese, iron (II), iron (III), cobalt, and nickel.
Claim 7
Dependent Claim
21 words
The method of claim 2 wherein the second series transition metal is selected from the group consisting of zirconium and silver.
Claim 8
Dependent Claim
12 words
The method of claim 2 wherein the group III metal is aluminum.
Claim 9
Dependent Claim
23 words
The method of claim 2 wherein the group IV metal is selected from the group consisting of tin (II), tin (IV), and lead.
Claim 10
Dependent Claim
21 words
The method of claim 2 wherein the group II B metal is selected from the group consisting of zinc and cadmium.
Claim 11
Independent Claim
79 words
A method of treating asbestos to reduce its hemolytic activity comprising: (a) contacting the asbestos with a solution of an ionizable salt of at least one first metal to deposit at least a portion of the ionizable salt on the asbestos; (b) contacting the asbestos with a solution of a molybdate salt of at least one second metal to form a molybdate of at least one first metal on at least a portion of the surface of the asbestos.
Claim 12
Independent Claim
79 words
A method of treating asbestos to reduce its hemolytic activity comprising: (a) contacting the asbestos with a solution of an ionizable salt of at least one first metal to deposit at least a portion of the ionizable salt on the asbestos; (b) contacting the asbestos with a solution of a molybdate salt of at least one second metal to form a molybdate of at least one first metal on at least a portion of the surface of the asbestos.
Claim 13
Independent Claim
30 words
A method of treating asbestos to reduce its hemolytic activity comprising depositing on at least a portion of the asbestos a material consisting essentially at a hemolysis-reducing tin (II) molybdate.
Claim 14
Independent Claim
30 words
A method of treating asbestos to reduce its hemolytic activity comprising depositing on at least a portion of the asbestos a material consisting essentially at a hemolysis-reducing tin (II) molybdate.
Claim 15
Independent Claim
30 words
A method of treating asbestos to reduce its hemolytic activity comprising depositing on at least a portion of the asbestos a material consisting essentially of a hemolysis-reducing tin (IV) molybdate.
Claim 16
Independent Claim
30 words
A method of treating asbestos to reduce its hemolytic activity comprising depositing on at least a portion of the asbestos a material consisting essentially of a hemolysis-reducing tin (IV) molybdate.
Claim 17
Dependent Claim
13 words
The method of claim 10 wherein the second metal is an alkali metal.
Claim 18
Dependent Claim
19 words
The method of claim 13 wherein the alkali metal is selected from the group consisting of sodium and potassium.
Claim 19
Dependent Claim
40 words
The method of claim 10 wherein the first metal is selected from the group consisting of alkali metals, alkaline earth metals, first series transition metals, second series transition metals, group II B metals, group III metals, and group IV metals.
Claim 20
Dependent Claim
34 words
The method of claim 10 wherein the solution of the ionizable salt has a salt concentration of from about 1 percent by weight to about a concentration corresponding to saturated solution of the salt.
Claim 21
Dependent Claim
32 words
The method of claim 10 wherein the solution of the ionizable salt has a salt concentration of from about 5 percent by weight to about 10 percent by weight of the salt.
Claim 22
Dependent Claim
27 words
The method of claim 10 wherein the ionizable salt includes at least one member selected from the group consisting of a chloride, a sulfate, and a nitrate.
Claim 23
Dependent Claim
12 words
The method of claim 10 wherein the ionizable salt is a chloride.
Claim 24
Dependent Claim
38 words
The method of claim 10 wherein the solution of the molybdate salt has a concentration of from about 1 percent by weight to about the concentration corresponding to a saturated solution of the molybdate of the second metal.
Claim 25
Dependent Claim
35 words
The method of claim 10 wherein the solution of the molybdate salt has a concentration of from about 1 percent by weight to about 10 percent by weight of the molybdate of the second metal.
Claim 26
Dependent Claim
16 words
The method of claim 10 wherein the solution of the ionizable salt is an aqueous solution.
Claim 27
Dependent Claim
16 words
The method of claim 10 wherein the solution of the molybdate salt is an aqueous solution.
Claim 28
Dependent Claim
29 words
The method of claim 1 wherein the depositing step comprises spraying at least a portion of the asbestos with at least one metal molybdate suspended in a liquid medium.
Claim 29
Dependent Claim
10 words
The method of claim 24 wherein the medium is water.
Claim 30
Dependent Claim
83 words
The method of claim 1 wherein the depositing step comprises: (a) contacting the asbestos with a solution of a molybdate salt of at least one second metal to deposit at least a portion of the molybdate salt on the asbestos; and optionally (b) contacting the asbestos from step (a) with a solution of an ionizable salt of at least one first metal to form a molybdate of at least one first metal on at least a portion of the surface of the asbestos.
Claim 31
Independent Claim
143 words
A method for treating asbestos comprising: (a) slurrying the asbestos with a sufficient amount of an aqueous solution of an ionizable salt of at least one first metal selected from the group consisting of alkali metals, alkaline earth metals, first series transition metals, second series transition metals, group II B metals, group III metals, and group IV metals, to deposit at least a portion of the ionizable salt of at least one first metal on at least a portion of the asbestos; (b) slurrying the asbestos from step (a) with an aqueous solution of a molybdate salt of at least one alkali metal to form about 0.05 to 5.0 percent by weight, based on the asbestos a molybdate salt of at least one first metal on at least that portion of the asbestos wherein the ionizable salt of the first metal was deposited.
Claim 32
Independent Claim
143 words
A method for treating asbestos comprising: (a) slurrying the asbestos with a sufficient amount of an aqueous solution of an ionizable salt of at least one first metal selected from the group consisting of alkali metals, alkaline earth metals, first series transition metals, second series transition metals, group II B metals, group III metals, and group IV metals, to deposit at least a portion of the ionizable salt of at least one first metal on at least a portion of the asbestos; (b) slurrying the asbestos from step (a) with an aqueous solution of a molybdate salt of at least one alkali metal to form about 0.05 to 5.0 percent by weight, based on the asbestos a molybdate salt of at least one first metal on at least that portion of the asbestos wherein the ionizable salt of the first metal was deposited.
Claim 33
Dependent Claim
39 words
The method of claim 27 including agitating the asbestos and the aqueous solution of the ionizable salt of the first metal for a sufficient time to allow the ionizable salt to contact at least a portion of the asbestos.
Claim 34
Dependent Claim
29 words
A fibrous asbestos material consisting essentially of asbestos fibers having deposited thereon at least one hemolysis-reducing metal molybdate about 0.05 to 5.0 percent by weight, based on the asbestos.
Claim 35
Dependent Claim
29 words
A fibrous asbestos material consisting essentially of asbestos fibers having deposited thereon at least one hemolysis-reducing metal molybdate about 0.05 to 5.0 percent by weight, based on the asbestos.
Claim 36
Dependent Claim
39 words
The material of claim 29 wherein the metal is selected from the group consisting of alkali metals, alkaline earth metals, first series transition metals, second series transition metals, group II B metals, group III metals, and group IV metals.
Claim 37
Dependent Claim
11 words
The material of claim 30 wherein the alkali metal is sodium.
Claim 38
Dependent Claim
21 words
The material of claim 30 wherein the alkaline earth metal is selected from the group consisting of magnesium, calcium, and barium.
Claim 39
Dependent Claim
31 words
The material of claim 30 wherein the first series transition metal is selected from the group consisting of titanium (III), titanium (IV), chromium, manganese, iron (II), iron (III) cobalt, and nickel.
Claim 40
Dependent Claim
21 words
The material of claim 30 wherein the second series transition metal is selected from the group consisting of zirconium and silver.
Claim 41
Dependent Claim
12 words
The material of claim 30 wherein the group III metal is aluminum.
Claim 42
Dependent Claim
23 words
The material of claim 30 wherein the group IV metal is selected from the group consisting of tin (II), tin (IV), and lead.
Claim 43
Dependent Claim
21 words
The material of claim 30 wherein the group II B metal is selected from the group consisting of zinc and cadmium.
Claim 44
Dependent Claim
17 words
A fibrous asbestos material consisting essentially of asbestos fibers having deposited thereon hemolysis reducing tin (IV) molybdate.
Claim 45
Dependent Claim
17 words
A fibrous asbestos material consisting essentially of asbestos fibers having deposited thereon hemolysis reducing tin (IV) molybdate.
Claim 46
Dependent Claim
18 words
A fibrous asbestos material consisting essentially of asbestos fibers having deposited thereon a hemolysis reducing tin (II) molybdate.
Claim 47
Dependent Claim
18 words
A fibrous asbestos material consisting essentially of asbestos fibers having deposited thereon a hemolysis reducing tin (II) molybdate.
Claim 48
Independent Claim
67 words
A method of treating asbestos to reduce its hemolytic activity comprising depositing on at least a portion of the asbestos an effective amount of a material consisting essentially of at least one metal molybdate selected from the group consisting of tin (II) molybdate, tin (IV) molybdate, iron (II) molybdate, and silver molybdate, to reduce the hemolytic activity of the asbestos to at least about 15 percent hemolysis.
Claim 49
Independent Claim
67 words
A method of treating asbestos to reduce its hemolytic activity comprising depositing on at least a portion of the asbestos an effective amount of a material consisting essentially of at least one metal molybdate selected from the group consisting of tin (II) molybdate, tin (IV) molybdate, iron (II) molybdate, and silver molybdate, to reduce the hemolytic activity of the asbestos to at least about 15 percent hemolysis.
Claim 50
Dependent Claim
60 words
A fibrous asbestos material consisting essentially of asbestos fibers having deposited thereon at least one metal molybdate selected from the group consisting of tin (II) molybdate, tin (IV) molybdate, iron (II) molybdate, and silver molybdate, said fibrous asbestos material being further characterized as having its hemolytic activity reduced by said deposited metal molybdate to at least about 15 percent hemolysis.
Claim 51
Dependent Claim
60 words
A fibrous asbestos material consisting essentially of asbestos fibers having deposited thereon at least one metal molybdate selected from the group consisting of tin (II) molybdate, tin (IV) molybdate, iron (II) molybdate, and silver molybdate, said fibrous asbestos material being further characterized as having its hemolytic activity reduced by said deposited metal molybdate to at least about 15 percent hemolysis.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-15 | 1983-04-16 | 1983-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-15 | 1987-04-16 | 1987-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-15 | 1991-04-16 | 1991-10-16 | $7700.00 | Window Closed / Lapsed |