| 摘要 |
<p>This invention relates to a process for continuously obtaining sodium perborate tetrahydrate in which the yield of boron mineral is increased by between 7 and 20% with respect to the conventional method, and which consists of extracting part of the metaborate contained in the sludges originating from the pre-layer filters with water, and in which crystallisation of the sodium perborate tetrahydrate takes place by supersaturating the solution by evaporation in vacuo.</p> |
