Sodium aluminate → Sodium aluminosilicate

HRID 435427

Reaction equation

HRID 435427 reaction equation
[OH2:1].O.O.[Na].[Al:5].[Si:6].[K].[Ca].[OH-].[Na+:10].[O:11]=[Al-:12]=O.[Na+]>>[OH2:11].[O-2:1].[O-2:11].[O-2:11].[O-2:11].[O-2:11].[O-2:11].[Na+:10].[Na+:10].[Al+3:12].[Al+3:5].[Si+4:6]

Participants

4

Reactant 3

HCID 14766Sodium aluminateHCID 14798Sodium HydroxideHCID 6336554Clinoptilolite ((K0-1Na0-1Ca0-0.5)6(Al6Si30O72).20H2O)3×

Product 1

HCID 72941443Sodium aluminosilicate

Procedure

In accordance with the present invention a sodium cation form of zeolite A is prepared from natural clinoptilolite by a novel two step hydrothermal process which comprises (1) heating the natural clinoptilolite in an aqueous sodium hydroxide solution for a period of time to dissolve clinoptilolite and filtering to remove undissolved material, including undissolved clinoptilolite and, elemental impurties, and form a filtrate which is (2) reacted by heating with at least 75 percent of a stoichiometric amount of sodium aluminate in aqueous solution for a period of time to precipitate and form zeolite A which may be recovered by filtration of the mixture followed by water wash and drying.

Workup

  1. filtrationfiltering
  2. customto remove undissolved material
  3. customform a filtrate which
  4. customreacted
  5. customto precipitate

Sources & evidence

ORD record
ord-1fb25da2c5ee4001828e843bf3b63a36
Source dataset
uspto-grants-1983_08
Patent number
US04401634

Linked notes

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