A four-stage sequential leaching (SL) and subsequently cooling crystallization (CC) techniques have been implemented for the recovery of boron from the clay waste (CW) induced by the borax derivatives production facility located in Kırka district of Eskişehir province, NW of Turkey. Optimum experimental solid-liquid ratio and agitation time for SL tests were determined by preliminary experiments. In the first leaching stage, approximately 85% of boron in the CW was transited to the leachate. A logarithmic decrease in the boron transition efficiency was obtained as a function of stages. After four-stage SL procedure, CC procedure was carried out with the last leachate at 4.0 °C ±0.3 stabilized refrigerator. Approximately 77% of dissolved boron in the last leachate was crystallized by CC as high purity borax crystals. Mineralogical, chemical, and physical definitions of the crystals were determined by X-ray diffraction (XRD), instrumental element analysis following microwave digestion, and scanning electron microscopy (SEM) procedures, respectively. As a result, sequential leaching followed by cooling crystallization system was determined as an effective methodology for the recovery of boron from the CW as high purity borax form.

已实施了四阶段连续浸出（SL）和随后的冷却结晶（CC）技术，用于从位于土耳其西北部埃斯基谢希尔省Kırka区的硼砂衍生物生产设施诱发的粘土废料（CW）中回收硼。 。通过初步实验确定了SL试验的最佳实验固液比和搅拌时间。在第一个浸出阶段，化学废物中约85％的硼被转移到渗滤液中。硼跃迁效率的对数降低是级数的函数。经过四阶段的SL程序后，最后的沥滤液在4.0°C±0.3稳定的冰箱中进行了CC程序。最后渗滤液中约77％的溶解硼通过CC结晶为高纯度硼砂晶体。矿物学，化学，分别通过X射线衍射（XRD），微波消解后的仪器元素分析和扫描电子显微镜（SEM）程序确定晶体的晶体和物理定义。结果，随后的淋洗和随后的冷却结晶系统被确定为从CW中以高纯度硼砂形式回收硼的有效方法。