| 摘要 |
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.
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