Direct production method of sulfate monohydrate

• Main Authors: CHEN YAO, LI WENJIN, CHAI ZHIHUA, FU HAIKUO, WU LIJUE
• Format: Patent
• Language: Chinese; English
• Published: 20.06.2017
• Subjects: CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; COMPOUNDS THEREOF; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

The invention discloses a direct production method of sulfate monohydrate. The method is characterized by comprising the following steps: (1) adding a water soluble organic solvent into an evaporation kettle filled with a sulfate solution and uniformly stirring and mixing the mixture; (2) stopping adding the organic solvent, heating the evaporating kettle, and performing solid-liquid separation while being still hot after being evaporated and concentrated to the slurry terminal point density of 1.2-1.6g/ml; and (3) obtaining the solid after solid-liquid separation, that is a sulfate monohydrate product, and returning mother liquor to the evaporating kettle. The crystallizing rate is 98% above, the sulfate monohydrate product can be produced directly by a one-step method, the mother liquor can be recycled, the production process is short, and the method is simple and convenient to operate. 本发明公开了种水硫酸盐的直接生产方法，在于：（1）向装有硫酸盐溶液的蒸发釜中按比例加入水溶性有机溶剂，搅拌混匀；（2）停止加入有机溶剂，对蒸发釜进行加热升温，蒸发浓缩至浆体终点密度为1.2 g/ml~1.6 g/ml趁热固液分离；（3）固液分离