摘要：【中文】本发明公开了一种针状二水钼酸钠的制备方法，步骤包括：将片状二水钼酸钠溶于水并配制成饱和溶液；将饱和溶液升温后加入六偏磷酸钠，恒温至六偏磷酸钠完全溶解后将溶液降至常温，恒温一段时间后快速过滤，将得到的固体洗涤、干燥后获得针状二水钼酸钠产品。本发明提供的针状二水钼酸钠的制备方法操作简单且基本无污染，同时能够获得纯度高、粒度大、溶出速率高的针状二水钼酸钠产品。 【EN】The invention discloses a preparation method of needle-shaped sodium molybdate dihydrate, which comprises the following steps: dissolving flaky sodium molybdate dihydrate in water to prepare a saturated solution; and heating the saturated solution, adding sodium hexametaphosphate, keeping the temperature until the sodium hexametaphosphate is completely dissolved, cooling the solution to normal temperature, keeping the temperature for a period of time, quickly filtering, washing the obtained solid, and drying to obtain the needle-shaped sodium molybdate dihydrate product. The preparation method of the needle-shaped sodium molybdate dihydrate provided by the invention is simple to operate and basically free of pollution, and can obtain a needle-shaped sodium molybdate dihydrate product with high purity, large granularity and high dissolution rate.

摘要：【中文】本发明提供了一种溶析剂可回收的甘氨酸结晶法，在连续溶析结晶制备甘氨酸的同时实现溶析剂的回收，本发明还提供了相应的溶析剂回收装置。本发明提供的甘氨酸的连续溶析结晶方法能够生产出平均粒度最大可达1034.841μm且均匀的产品，实验过程达到平衡后产出的产品粒度无差异，消除产品质量批间差异；与半间歇溶析结晶工艺相比，本发明还具有结晶过程温度低、能耗低、污染少的优点；通过对母液过膜处理能够将母液中低含量的乙醇以高浓度乙醇的形式回收再利用，可以解决传统母液回收方法中能耗过大、设备占地面积大、操作过程复杂、设备维修不便、易引入第三方物质及溶析剂回收率低等问题。 【EN】The invention provides a glycine crystallization method capable of recycling a leaching agent, which realizes the recovery of the leaching agent while preparing glycine by continuous leaching crystallization and also provides a corresponding device for recovering the leaching agent. The continuous elution crystallization method of glycine provided by the invention can produce uniform products with average particle size of 1034.841 μm at most, the particle size of the products produced after the experimental process reaches balance is not different, and the batch difference of product quality is eliminated; compared with a semi-intermittent solventing-out crystallization process, the invention also has the advantages of low temperature, low energy consumption and less pollution in the crystallization process; the ethanol with low content in the mother liquor can be recycled in the form of high-concentration ethanol by membrane treatment of the mother liquor, and the problems of overlarge energy consumption, large occupied area of equipment, complex operation process, inconvenient maintenance of the equipment, easiness in introduction of third-party substances, low recovery rate of the elution agent and the like in the traditional mother liquor recycling method can be solved.

摘要：【中文】本发明提供了一种二水钼酸钠的连续蒸发结晶方法，具体为：于蒸发结晶器中先加入一定体积的饱和钼酸钠水溶液，再加入一定量二水钼酸钠固体；开启蒸发结晶过程，蒸发结晶过程中以一定的加料速率向蒸发结晶器中连续加入饱和钼酸钠水溶液，同时以一定的速率连续排出蒸发结晶器中产生的晶浆，过程中保持一定的蒸发速率；晶浆经过滤、烘干处理后得到产品。本发明提供的二水钼酸钠的连续蒸发结晶方法简单易行，与传统结晶工艺相比，省去了原料试剂的生产以及反复洗涤除杂过程，缩短了工艺路线，降低了原料消耗和劳动强度，提高了钼金属的回收率，使生产成本显著降低。由本发明制备获得的产品粒度均匀且批间无差异，平均粒度可达920μm以上。 【EN】The invention provides a continuous evaporation crystallization method of sodium molybdate dihydrate, which comprises the following steps: firstly, adding a certain volume of saturated sodium molybdate aqueous solution into an evaporation crystallizer, and then adding a certain amount of dihydrate sodium molybdate solid; starting an evaporation crystallization process, continuously adding a saturated sodium molybdate aqueous solution into an evaporation crystallizer at a certain feeding rate in the evaporation crystallization process, and simultaneously continuously discharging crystal slurry generated in the evaporation crystallizer at a certain rate, wherein a certain evaporation rate is kept in the process; and filtering and drying the crystal mush to obtain the product. The continuous evaporation crystallization method of sodium molybdate dihydrate provided by the invention is simple and easy to implement, and compared with the traditional crystallization process, the method omits the production of raw material reagents and repeated washing and impurity removal processes, shortens the process route, reduces the raw material consumption and labor intensity, improves the recovery rate of molybdenum metal, and obviously reduces the production cost. The product prepared by the method has uniform granularity and no difference among batches, and the average granularity can reach more than 920 mu m.