Patent US3784197A successfully refreshed from Google Patents.
EP0098641A2
Expired / Lapsed
EP
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Process for preparing ZMS-5 zeolites
Assignee: SnamProgetti SpA
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Filing: 1983-06-27
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Granted: —
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Expires: 2003-06-27
Abstract
Abstract A process for preparing porous crystalline alumino-silicates consisting of bringing into contact, in an aqueous environment, sodium silicate with an aluminium derivative at a molar SiO 2 /Al 2 O 3 ratio greater than or equal to 8, in the presence of one ore more alkaline hydroxides at a molar Me+/SiO 2 ratio greater than 0,6, where Me + represents the alkaline metal or metals, and in the presence of a mineralising agent, operating at a temperature of between 20° and 100 °C, and controlling the molar OH-/Si0 2 ratio of the re- suitant mixture at a value of 0.01 and 0.8, the resultant mixture being crystallised at said molar OH-/SiO 2 ration in a closed environment for a period of between some hours and 40 days at a temperature of between 100° and 200 °C.
Inventors
- 👤 Bruno Notari
- 👤 Giovanni Manara
- 👤 Giuseppe Bellussi
- 👤 Marco Taramasso
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 17:50
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C01B33/26; C01B33/28; C01B33/2807; C01B33/2861; Y; Y10; Y10S; Y10S423/00; Y10S423/22; Y10S423/23; Y10S423/25
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
129 words
A process for preparing porous crystalline alumino-silicates characterised by bringing into contact, in an aqueous environment, sodium silicate with an aluminium derivative at a molar SiO /A1 0 ratio greater than or equal to 8, in the presence of one or more alkaline hydroxides at a molar Me /SiO 2 ratio greater than 0.6, where Me + represents the alkaline metal or metals, and in the presence of a mineralising agent, operating at a temperature of between 20° and 100°C, and controlling the molar OH/SiO 2 ratio of the resultant mixtur& at between 0.01 and 0.8, the resultant mixture being crystallised at said molar OH/SiO 2 ratio in a closed environment for a period of between some hours and 40 days at a temperature of between 100° and 200°C.
Claim 2
Dependent Claim
129 words
A process for preparing porous crystalline alumino-silicates characterised by bringing into contact, in an aqueous environment, sodium silicate with an aluminium derivative at a molar SiO /A1 0 ratio greater than or equal to 8, in the presence of one or more alkaline hydroxides at a molar Me /SiO 2 ratio greater than 0.6, where Me + represents the alkaline metal or metals, and in the presence of a mineralising agent, operating at a temperature of between 20° and 100°C, and controlling the molar OH/SiO 2 ratio of the resultant mixtur& at between 0.01 and 0.8, the resultant mixture being crystallised at said molar OH/SiO 2 ratio in a closed environment for a period of between some hours and 40 days at a temperature of between 100° and 200°C.
Claim 3
Dependent Claim
27 words
A process for preparing porous crystalline alumino-silicates as claimed in claim 1, characterised in that the molar Me + /SiO 2 ratio lies between 0.66 and 0.96.
Claim 4
Dependent Claim
40 words
A process for preparing porous crystalline alumino-silicates as claimed in claim 1, characterised in that the molar SiO 2 /Al 2 O 3 ratio lies between 10 and 200, and the molar OH/SiO 2 ratio lies between 0.2 and 0.8.
Claim 5
Dependent Claim
39 words
A process for preparing porous crystalline alumino-silicates as claimed in claim 1, characterised in that the molar SiO 2 /Al 2 O ratio lies between 20 and 50, and the molar OH/SiO 2 ratio lies between 0.05 and 0.30.
Claim 6
Dependent Claim
41 words
A process for preparing porous crystalline alumino-silicates as claimed in claim 1, characterised in that the molar SiO 2 /Al 2 O 3 ratio lies between 8 and 25, and the molar OH /Si0 2 ratio lies between 0.01 and 0.25.
Claim 7
Dependent Claim
16 words
A process as claimed in claim 1, wherein the crystallisation temperature lies between 150° and 180°C.
Claim 8
Dependent Claim
27 words
A process as claimed in claim 1, wherein the mineralising agents are chosen from sodium sulphate, potassium sulphate, sodium phosphate, potassium phosphate, sodium chloride and potassium chloride.
Claim 9
Dependent Claim
18 words
A process as claimed in claim 1, wherein the alkaline hydroxides are chosen from LiOH, NaOH and KOH.
Claim 10
Dependent Claim
22 words
A process as claimed in'claim 1, wherein the aluminium derivative is chosen from sodium aluminate, aluminium sulphate, aluminium chloride and alumina trihydrate.
References Cited (Backward Citations)
No citation records indexed.
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