| 摘要 |
FIELD: chemical industry; methods of production of zeolite. ^ SUBSTANCE: the invention is pertaining to chemical industry, in particular, to the method of production of zeolite. The method of production of ZSM-5 type zeolite provides for mixing in water of the initial components: silicon, additional members, alkali and seeding agents; realization of the crystallization, the ion exchange, separation of the produced mashes, modifications, granulation, drying, annealing; withdrawal of the main components from the waste waters. The method differs by the fact, that as the source of silicon or its part they apply silica gel extracted from the own local production process as a result of settling from the alkaline waste water outflow by the acidic flow. Then the alkaline waters after filtration and washing of Na-form zeolite are neutralized by the acid waters containing the additional components and produced at the stage of the filtration after the ion exchange. The method allows to use the waste waters of the own production of ZSM-5-type zeolite for production of silica gel, recoverable during the production in the capacity of a source component. ^ EFFECT: the invention ensures production of ZSM-5-type zeolite and silica gel from the waste waters of the own production of ZSM-5-type zeolite. ^ 17 cl, 6 ex |
