Patent US2593374A successfully refreshed from Google Patents.
Patent EP0097512A2 successfully refreshed from Google Patents.
EP0097512A2
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EP
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Aluminosilicates
Assignee: Ineos Silicas Ltd
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Filing: 1983-06-20
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Granted: —
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Expires: 2003-06-20
Abstract
Abstract This invention provides novel amorphous aluminosilicates having useful ion exchange properties and resistance to reaction with sodium silicate when used in detergent compositions. The invention also discloses routes to manufacture of the novel aluminosilicates.
Inventors
- 👤 Colin Atkinson
- 👤 Roger Brace
- 👤 Nathan Burak
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 15:49
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C01B33/26; C01B33/28; C01B33/32; C11; C11D; C11D3/00; C11D3/02; C11D3/12; C11D3/124; C11D3/1246; C11D3/128
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
169 words
An amorphous hydrated sodium aluminosilicate of chemical composition calculated on an anhydrous basis: having, calculated on a dry basis, a calcium ion-exchange capacity greater than 100 mg CaO/g, a magnesium capacity greater than 50 mg MgO/g, an average particle size in the range 2 to 20 µm, and the ability to form a filter cake having a solids content in the range 35-50%, in a filter press with a closing pressure of 5.62 kg/cm 2 , which filter cake can be converted into a pumpable slurry in said solids range, and having a silicate resistance (as hereinbefore defined) such that the second order rate constant k for the calcium exchange process is greater than 0.2 °H -1 min -1 and a residual water hardness after 10 minutes of less than 1.5 °H and which after drying at 50°C to 80% solids has a rate constant k (as hereinbefore defined) greater than 0.42 °H -1 min -1 and a residual water hardness after 10 minutes of less than 1 °H.
Claim 2
Dependent Claim
169 words
An amorphous hydrated sodium aluminosilicate of chemical composition calculated on an anhydrous basis: having, calculated on a dry basis, a calcium ion-exchange capacity greater than 100 mg CaO/g, a magnesium capacity greater than 50 mg MgO/g, an average particle size in the range 2 to 20 µm, and the ability to form a filter cake having a solids content in the range 35-50%, in a filter press with a closing pressure of 5.62 kg/cm 2 , which filter cake can be converted into a pumpable slurry in said solids range, and having a silicate resistance (as hereinbefore defined) such that the second order rate constant k for the calcium exchange process is greater than 0.2 °H -1 min -1 and a residual water hardness after 10 minutes of less than 1.5 °H and which after drying at 50°C to 80% solids has a rate constant k (as hereinbefore defined) greater than 0.42 °H -1 min -1 and a residual water hardness after 10 minutes of less than 1 °H.
Claim 3
Dependent Claim
16 words
An amorphous hydrated sodium aluminosilicate as claimed in claim 1 in which the chemical composition is:
Claim 4
Dependent Claim
115 words
A process for the preparation of amorphous aluminosilicate as claimed in claim 1 or claim 2, in which aqueous sodium silicate, having a composition Na 2 0 2-4 SiO 2 and a concentration in the range 1-4 moles/litre Sio 2 ; and aqueous aluminate having a composition 1-2 Na 2 0 A1 2 0 3 and a concentration in the range 0.5 to 2.0 moles/litre A1 2 0 3 , are intimately mixed together at a temperature in the range 15-45°C in a mixing device to produce a sodium aluminosilicate composition which is immediately subjected to high shear in a disintegrator to produce a particle size of aluminosilicate less than 20 µm and subsequently aged.
Claim 5
Dependent Claim
20 words
A process as claimed in claim 3, in which the aluminate and/or the silicate solutions contain an inert soluble salt.
Claim 6
Dependent Claim
35 words
A process as claimed in claim 3 or claim 4, in which the amorphous aluminosilicate is separated from the aqueous solution from which it was formed to yield a cake having greater than 35% solids.
Claim 7
Dependent Claim
26 words
A process as claimed in claim 5 in which the filter cake is dried to form a dried composition which can be redispersed into a slurry.
Claim 8
Dependent Claim
25 words
A process as claimed in claim 5 in which the filter cake is mixed with a dispersing agent and re-slurried to produce a pumpable suspension.
Claim 9
Dependent Claim
31 words
A process as claimed in claims 3, 4, 5 or 7, in which the aluminosilicate is mixed with a dispersing agent and its particle size is reduced by milling or grinding.
Claim 10
Dependent Claim
35 words
A process as claimed in claim 7 or claim 8 in which the aluminosilicate and dispersing agent slurry is dried to form a dry aluminosilicate composition which can be redispersed into an aqueous pumpable slurry.
Claim 11
Dependent Claim
29 words
An amorphous hydrated sodium aluminosilicate comprising an effective amount of a dispersing agent prepared by a process as claimed in any one of the claims 7, 8 or 9.
Claim 12
Dependent Claim
15 words
An amorphous hydrated sodium aluminosilicate as claimed in claim 10, comprising an inert soluble salt.
References Cited (Backward Citations)
No citation records indexed.
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