发明名称 |
METHOD OF PRODUCING CALCIUM CHLORIDE |
摘要 |
FIELD: chemistry.SUBSTANCE: invention relates to production of granular calcium chloride which can be used in the oil industry and public and road facilities. A nonionic surfactant in amount of 0.0005-0.001 wt % is added to liquid wastes in form of a suspension of filter liquid from ammonia and soda production. The suspension of filter liquid is heated to temperature of 80-95°C for 0.5-1 hours. Hydrochloric acid is added until attaining reaction mixture pH of 6.0-6.5. The reaction mixture is evaporated until achieving density of 1.4-1.45 g/cm. The evaporated solution is cooled to temperature of 10-15°C, followed by separation of ammonium chloride crystals. Ammonium chloride crystals are separated by filtering and then taken for further reaction with lime to obtain a suspension of calcium chloride. The calcium chloride suspension is dehydrated and crystallised at temperature of 100-150°C to obtain the end product - granular calcium chloride.EFFECT: invention increases efficiency of the process of evaporating liquid wastes from soda production and reduces scaling of heat-exchange equipment.1 dwg |
申请公布号 |
RU2474536(C1) |
申请公布日期 |
2013.02.10 |
申请号 |
RU20110143536 |
申请日期 |
2011.10.27 |
申请人 |
MUSTAFIN AKHAT GAZIZ'JANOVICH |
发明人 |
MUKHAMETOV ASKAT AKHIJAROVICH;MUSTAFIN AKHAT GAZIZ'JANOVICH;VORONIN ANATOLIJ VASIL'EVICH;SADYKOV NURGALI BASYROVICH;MURTAZIN RADIK KHAJDAROVICH;MUKHAMETOV ARTUR ASKATOVICH;SHARIPOV TAGIR VIL'DANOVICH |
分类号 |
C01F11/24 |
主分类号 |
C01F11/24 |
代理机构 |
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