| 摘要 |
PCT No. PCT/US94/13652 Sec. 371 Date Jul. 22, 1996 Sec. 102(e) Date Jul. 22, 1996 PCT Filed Dec. 1, 1994 PCT Pub. No. WO95/15370 PCT Pub. Date Jun. 8, 1995There 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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