TAILOR-MADE ADDITIVES TO INFLUENCE THE HABIT OF BARITE (BASO4) OBTAINED BY PRECIPITATION

In order to influence the habit of barite (BaSO4) single crystals obta ined by precipitation, the tailor-made additives 2-aminoethanol, 3-ami nopropanol, 5-aminopentanol, 4-aminobutane sulfonic acid, and several other growth inhibitors have been tested. The crystallization experime nts have been carried out in a fully automated crystallizer with repro ducible educt feed rates. The kinetics of the reaction has been measur ed by means of the conductivity. Scanning electron microscopic analysi s of the obtained crystal habits led to the result that most of the ad ditives tested did not influence the growth form of the crystals, but the predicted, tailor-made additives resulted in a more isometric crys tal form.