Granular alkali metal nitrilotriacetate

Details Granular alkali metal nitrilotriacetate Granular alkali metal nitrilotriacetate

1998-01-14

1999-12-07

Shippen, Michael L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acids and salts thereof

252546, C07C22900

Patent

active

059986638

ABSTRACT:
There is disclosed a process for preparing highly absorptive granular alkali metal nitrilotriacetate by contacting NTA powder with an aqueous alkali metal silicate solution. A granular product having a majority of the granules, by weight, in the -12 to +80 mesh size range, which have a density of at least about 0.60 g/cc and an absorptivity in the absorptivity test in the range of above 7 ml/100 g is produced by contacting alkali metal nitrilotriacetate with an alkali metal silicate solution, mixing the material to granulate it and then drying the granules. A granular product having a density of at least about 0.60 g/cc, fewer than 15% fine material and an absorptivity in the range of from about 7-20 ml/100 g is produced.

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