Method for producing a crystalline solid from glycine-N,N-diacetic acid derivatives with sufficiently reduced hygroscopicity
US9376649B2 · kind B2 · utility
2Cited by
4References
18Claims
0Family size
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Key dates
| Filing date | Aug 25, 2010 |
| Grant date | Jun 28, 2016 |
| Priority date | — |
| Expiry date | Oct 16, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07B2200/13
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to a process for preparing a crystalline solid from glycine-N,N-diacetic acid derivatives (e.g., MGDA) of sufficiently low hygroscopicity, which is characterized in that at least one crystalline compound of the formula I is introduced as seed, and a spray granulation is carried out with at least one compound of the formula I, preferably followed by a heat treatment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.