FILTER ELEMENT FOR MAKING HIGHLY PURE ANHYDROUS ALUMINIUM CHLORIDE Russian patent published in 2024 - IPC B01D29/46 C01F7/62 C01F7/56 

FIELD: filters.

SUBSTANCE: filter element can be used to purify aluminium chloride from organic and metal impurities in order to obtain a material of special purity in a single process of sublimation followed by sublimation. A filter element based on an aluminium-zinc alloy comprises layers of nozzle made in the form of spiral rings made of aluminium-zinc alloy foil and pyrocarbon wool located above the nozzle layer in a ratio of 1:1 to 1: 4 in height. The total height of the filter module (H) is (1-2)D, where D is the diameter of the sublimate-conducting tube. The filter layers are packaged in a quartz fabric cover to prevent filter components from getting into the finished product.

EFFECT: eliminating the multi-stage purification process of aluminium chloride with the achievement of a level of purity that meets the requirements for a particularly pure product, namely, it provides the possibility of obtaining product with a main substance content of at least 99.999 wt.% in one stage.

1 cl, 2 tbl, 3 ex