| NIRO PROCESS TECHNOLOGY B.V. Patent applications |
| Patent application number | Title | Published |
|---|
| 20100099893 | PURIFICATION OF LACTIDE RICH STREAMS - A method for the purification or recovery of lactide rich streams by the combination of a suspension-based melt crystallization process with a subsequent separation of the pure lactide crystals in a wash column is disclosed. | 04-22-2010 |
| 20080226529 | PURIFICATION OF PHOSPHORIC ACID RICH STREAMS - The invention relates to a method for the purification or recovery of orthophosphoric acid rich streams by suspension-based melt crystallization. The orthophosphoric acid is crystallized as the hemi-hydrate form and subsequent separation of such crystals in a wash-column produce a high purity acid/water solution that has been depleted of most of the metals and impurities other than water, thereby separating an orthophosphoric acid rich feed liquor into an ultra-pure orthophosphoric acid hemi-hydrate and a mother liquor containing almost all impurities originally present in the feed. The orthophosphoric acid rich feed liquor typically contains no more than 15 wt % water and 1 wt % other impurities. Individual metal ion composition in the purified orthophosphoric acid product is in the range of 100 to 1000 ppb (parts per billion= 1/1000 ppm) of each metal ion. The metal ion composition of the resulting purified product is thus typically below the detection limit of typical analysis equipment. | 09-18-2008 |
