US3860409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparation of acidic fertilizer containing slag
Assignee: Individual
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Filing: 1972-11-29
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Granted: 1975-01-14
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Expires: 1992-11-29
Abstract
Abstract Soil fertilizing and soil improving gel products may be made by a process which comprises admixing a pulverized waste copper slag with concentrated sulfuric acid having a strength of from 95 to 98% by weight and adding limited quantities of water to the acid wetted slag whereby the resulting slag-acid-water composition reacts to form a dry granular aggregate composed of about 80-85% water soluble partially hydrated, but mostly anhydrous, metallic sulfate salts in combination with metasilicic acid-adsorbed sulfuric acid, about 15-20% sulfuric acid insoluble metal silicates, and approximately 1-2% of elemental sulfur.
Inventors
- 👤 Harold W Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:25
CPC Classifications
C; C05; C05D; C05D9/00; C05D9/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
128 words
A PROCESS FOR MAKING SOIL FERTILIZING AND SOIL IMPROVEING GEL PRODUCTS COMPRISING THE STEPS OF: A. INTIMATELY MIXING A PULVERIZED WASTE COPPER SLAG OBTAINED FROM THE REVERBERATORY REFINING OF COPPER ORE WITH CONCENTRATED SULFURIC ACID HAVING A STRENGTH, BY WEIGHT, IN THE RANGE FROM 95 TO 98% H2SO4 IN AN ACID-TO-SLAG RATIO, BY WEIGHT, OF AT LEAST 1:1 SO AS TO THOROUGHLY WET THE SLAG AND TO SUBSTANTIALLY DISPLACED THE AIR THEREFROM; B. ADDING A QUANTITY OF WATER TO SAID ACID-WETTED SLAG BASED UPON THE WEIGHT OF SAID SLAG, WHEREBY THE RATIO, BY WEIGHT, OF WATER-TO-SLAG IN THE RESULTING SLAG-ACID-WATER COMPOSITION IS IN THE RANGE 1:4 TO 1:5; AND C. ALLOWING SAID SLAG-ACID-WATER COMPOSITION TO REACT TO FORM DRY GRANULAR GEL PRODUCTS CONTAINING LARGE QUANTITIES OF EQUIVALENT ACID.
Claim 2
Dependent Claim
128 words
A PROCESS FOR MAKING SOIL FERTILIZING AND SOIL IMPROVEING GEL PRODUCTS COMPRISING THE STEPS OF: A. INTIMATELY MIXING A PULVERIZED WASTE COPPER SLAG OBTAINED FROM THE REVERBERATORY REFINING OF COPPER ORE WITH CONCENTRATED SULFURIC ACID HAVING A STRENGTH, BY WEIGHT, IN THE RANGE FROM 95 TO 98% H2SO4 IN AN ACID-TO-SLAG RATIO, BY WEIGHT, OF AT LEAST 1:1 SO AS TO THOROUGHLY WET THE SLAG AND TO SUBSTANTIALLY DISPLACED THE AIR THEREFROM; B. ADDING A QUANTITY OF WATER TO SAID ACID-WETTED SLAG BASED UPON THE WEIGHT OF SAID SLAG, WHEREBY THE RATIO, BY WEIGHT, OF WATER-TO-SLAG IN THE RESULTING SLAG-ACID-WATER COMPOSITION IS IN THE RANGE 1:4 TO 1:5; AND C. ALLOWING SAID SLAG-ACID-WATER COMPOSITION TO REACT TO FORM DRY GRANULAR GEL PRODUCTS CONTAINING LARGE QUANTITIES OF EQUIVALENT ACID.
Claim 3
Dependent Claim
68 words
A process, as claimed in claim 1, wherein said slag contains from 15 to 35% total iron expressed as Fe metal; 25 to 40% silica; 8 to 10% calcium oxide; 6 to 8% aluminum oxide; 1 1/2 to 3% magnesium oxide; 2 to 3% zinc; about 1% manganese oxide; copper, lead and sulfur in quantities smaller than 1%; and, trace amounts of boron, molybdenum, nickel, gold and silver.
Claim 4
Dependent Claim
18 words
A process as claimed in claim 1, wherein the ratio of acid to slag is greater than 1:1.
Claim 5
Dependent Claim
25 words
A process, as claimed in claim 1, wherein the ratio of acid to slag is 3:2 and the ratio of water to slag is 1:5.
Claim 6
Dependent Claim
23 words
A process, as claimed in claim 1, wherein said slag-acid-water composition is maintained in a quiescent state to allow said composition to react.
Claim 7
Dependent Claim
72 words
A gelatinous soil improving a soil fertilizing composition comprising a dry, granular aggregate consisting essentially of about 80 to 85% water soluble anhydrous metallic sulfate salts and trace amounts of partially hydrated metallic sulfate salts in combination with metasilicic acid-adsorbed sulfuric acid; about 15 to 20% sulfuric acid insoluble metallic silicates; and about 1 to 2% elemental sulfur, said composition having a sulfuric acid equivalence in the range from 45 to 60%.
Claim 8
Dependent Claim
72 words
A gelatinous soil improving a soil fertilizing composition comprising a dry, granular aggregate consisting essentially of about 80 to 85% water soluble anhydrous metallic sulfate salts and trace amounts of partially hydrated metallic sulfate salts in combination with metasilicic acid-adsorbed sulfuric acid; about 15 to 20% sulfuric acid insoluble metallic silicates; and about 1 to 2% elemental sulfur, said composition having a sulfuric acid equivalence in the range from 45 to 60%.
Claim 9
Dependent Claim
32 words
A composition, as claimed in claim 6, wherein the metals of said metallic sulfate salts are selected from the group consisting of iron, calcium, magnesium, aluminum, manganese, zinc, copper and mixtures thereof.
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) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |