Water → HCID 131711628, compound

HRID 1863151Notes

Reaction equation

HRID 1863151 reaction equation
[Si:1](=[O:3])=[O:2].[OH2:4].[NH3:5].[OH2:6]>>[Si:1]([O-:6])([O-:4])([O-:3])[O-:2].[NH4+:5].[NH4+:5].[NH4+:5].[NH4+:5]

Participants

4

Reactant 3

HCID 962WaterHCID 24261Silica3×HCID 12896473Azane;hydrate

Product 1

HCID 131711628HCID 131711628, compound

Procedure

Silicon dioxide commercially obtained in the form of fine powder or gelatine can not successfully polymerize the black liquor when the silicon dioxide diluted with water is added to the liquor and heated and dehydrated to react. However, if silicon dioxide and the black liquor is heated to a high temperature in an autoclave to form the silicate, the condensation polymerization can be accomplished. Further, the condensation polymerization is also carried out successfully with the combined use of gelatinous silicon dioxide and ammonia water. It is presumed in the process of heating and dehydration that ammonium silicate is first formed and then it is decomposed into silicic acid.

Workup

  1. additionis added to the liquor
  2. temperatureheated
  3. customto react
  4. customto form the silicate
  5. customthe condensation polymerization
  6. customFurther, the condensation polymerization
  7. temperatureof heating

Sources & evidence

ORD record
ord-8d9ab77babeb479581592cb567aed897
Source dataset
uspto-grants-1979_09
Patent number
US04168252

Reaction notes

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