Patent US4601992A successfully refreshed from Google Patents.
US4601992A
Expired / Lapsed
US
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Product and process for the production of granules of high mechanical strength and containing molecular sieve
Assignee: Kali Chemie AG
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Filing: 1984-08-06
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Granted: 1986-07-22
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Expires: 2004-08-06
Abstract
Abstract Disclosed is a product and process for the production of granules of high mechanical strength comprising mixing a molecular sieve and a metal oxide into a paste with a silicate, shaping the paste into granules, subjecting the shaped granules to an exchange of bases, drying the granules and tempering the granules at 300° to 400° C.
Inventors
- 👤 Helmut Derleth
- 👤 Guenther Sauer
- 👤 Karl-Heinz Bretz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:22
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/16; B01J20/18; B01J20/186; B01J20/183
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
64 words
A process for the production of granules of high mechanical strength and high adsorption capacity comprising forming directly an aqueous paste, the solids thereof consisting essentially of a molecular sieve, a metal oxide and a water soluble silicate, shaping the paste into granules, subjecting the shaped granules to an exchange of bases, drying the granules, and tempering the granules at 300° to 400° C.
Claim 2
Dependent Claim
64 words
A process for the production of granules of high mechanical strength and high adsorption capacity comprising forming directly an aqueous paste, the solids thereof consisting essentially of a molecular sieve, a metal oxide and a water soluble silicate, shaping the paste into granules, subjecting the shaped granules to an exchange of bases, drying the granules, and tempering the granules at 300° to 400° C.
Claim 3
Dependent Claim
53 words
The process of claim 1 wherein the metal oxide is added in a total amount of from 5% to 94%, the molecular sieve is added in a total amount of from 1% to 95%, and the water soluble silicate is added in a total amount of from 5% to 50% calculated as solids.
Claim 4
Dependent Claim
38 words
The process of claim 2 wherein the metal oxide is from 9% to 50% by weight, the molecular sieve is from 27% to 79% by weight and the water soluble silicate is from 12% to 28% by weight.
Claim 5
Dependent Claim
37 words
The process of claim 2 wherein the metal oxide is selected from the group consisting of oxides of copper, barium, zinc, magnesium, rare earths, titanium, tin, lead, vanadium, antimony, chromium, manganese, iron, cobalt, nickel and mixtures thereof.
Claim 6
Dependent Claim
28 words
The process of claim 1 wherein the silicate is an aqueous solution of sodium silicate with a mole ratio of Na 2 O:SiO 2 of 0.26 to 0.49.
Claim 7
Dependent Claim
18 words
The process of claim 5 wherein the mole ratio of Na 2 O:SiO 2 is 0.27 to 0.30.
Claim 8
Dependent Claim
25 words
The process of claim 1 wherein the silicate is a guanidine silicate solution with a SiO 2 content of from 20% to 40% by weight.
Claim 9
Dependent Claim
17 words
The process of claim 7 wherein the SiO 2 content is from 25% to 35% by weight.
Claim 10
Dependent Claim
23 words
The process of claim 1 wherein the shaping is performed by the dripping of the mixture to be granulated into a precipitating solution.
Claim 11
Dependent Claim
13 words
The process of claim 1 wherein the shaping is performed by mechanical means.
Claim 12
Dependent Claim
27 words
The process of claim 9 wherein the precipitating solution comprises an aqueous solution of an ammonium salt having a concentration of from 12% to 36% by weight.
Claim 13
Dependent Claim
15 words
The process of claim 11 wherein the ammonium salt solution concentration is 15% to 37%.
Claim 14
Dependent Claim
30 words
The process of claim 10 wherein the exchange of bases is by treatment of the shaped granules with an ammonium salt solution having a concentration of from 5% to 33%.
Claim 15
Dependent Claim
18 words
The process of claim 11 wherein the ammonium salt solution has a concentration of from 15% to 25%.
Claim 16
Dependent Claim
29 words
The process of claim 9 wherein the exchange of bases is by treatment of the granules in an ammonium salt solution having a concentration of from 2% to 10%.
Claim 17
Dependent Claim
15 words
The process of claim 15 wherein the ammonium salt solution is from 3% to 5%.
Claim 18
Dependent Claim
47 words
Granules containing molecular sieves consisting essentially of from 1 to 95% by weight molecular sieve, from 5 to 94% by weight magnesium oxide and from 5 to 46% by weight SiO 2 formed by tempering an admixture of molecular sieve, magnesium oxide and a water soluble silicate.
Claim 19
Dependent Claim
47 words
Granules containing molecular sieves consisting essentially of from 1 to 95% by weight molecular sieve, from 5 to 94% by weight magnesium oxide and from 5 to 46% by weight SiO 2 formed by tempering an admixture of molecular sieve, magnesium oxide and a water soluble silicate.
Claim 20
Dependent Claim
43 words
The granules of claim 17 comprising 27 to 79% by weight molecular sieve, 9 to 50% by weight magnesium oxide and 10 to 24% by weight SiO 2 formed by tempering an admixture of molecular sieve, magnesium oxide and a water soluble silicate.
Claim 21
Dependent Claim
55 words
The granules containing molecular sieves produced by a process comprising forming a paste from a mixture consisting essentially of a molecular sieve, a metal oxide and a silicate solution, shaping the paste into granules, subjecting the shaped granules to an exchange of bases, drying the granules and tempering the granules at 300° to 400° C.
Claim 22
Dependent Claim
55 words
The granules containing molecular sieves produced by a process comprising forming a paste from a mixture consisting essentially of a molecular sieve, a metal oxide and a silicate solution, shaping the paste into granules, subjecting the shaped granules to an exchange of bases, drying the granules and tempering the granules at 300° to 400° C.
Claim 23
Dependent Claim
10 words
A catalyst composition comprising the granules defined by claim 19.
Claim 24
Dependent Claim
10 words
An adsorption medium comprising the granules defined by claim 19.
Claim 25
Dependent Claim
13 words
An adsorption medium as defined in claim 21, containing MgO as metal oxide.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-07-21 | 1990-01-20 | 1990-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-21 | 1994-01-20 | 1994-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-21 | 1998-01-20 | 1998-07-22 | $7700.00 | Window Closed / Lapsed |