SU436531A1 - Method of obtaining inorganic sorbents - Google Patents

Description

The invention relates to a method for producing inorganic sorbents bound by polytetrafluoroethylene, and can be used in chemical technology, for example, for concentrating and separating substances. A known method for producing inorganic sorbents bound by polytetrafluoroethylene by mixing 15-65 wt.% Polytetrafluoroethylene and 35-85% inorganic curing agent and subsequent sintering of the samples at 450 ° C. The known method is used only to obtain thermally stable sorbents that reduce the exchange capacity during heat treatment. According to the invention, polytetrafluoroethylene is sintering with one of the thermally stable initial reagents, for example trisodium phosphate, cobalt chloride, and o6pa6a, the resulting intermediate product (after pre-cooling and grinding) with a second reagent, for example chloride zirconyl, potassium ferricyanide, respectively. Example 1. Obtaining a sorbent based on zirconium phosphate. 10-40 weight.h. trisodium phosphate is mixed with 90-60 parts by weight. polytetrafluoro-agilev powder, poured / in the form with a layer of 15-20 mm thick and sintered at 380 ± 10 s for 2 h. The sintered intermediate is crushed, the fraction of particles of the desired size is placed in a chromatographic column, and a solution of zirconyl chloride in diethyl ether is applied through it. n NSE. The resulting sorbent is washed successively with ether and water until the turbidity disappears in the filtrate. The exchange capacity of the sorbent obtained in this way from an intermediate product containing 40 weight, h. trisodium phosphate, equal to 0.18 mg "eq / g of sorbent. Example 2, Preparation of a sorbent based on ammonium phosphomolybdate. Polytetrafluoroethylene is sintered with trisodium phosphate, milled and fractionated as in Example 1. An iOS solution of ammonium molybdate in 2N is passed through a chromatographic column. to remove the turbidity formed by small crystals; the precipitate of ammonium phosphomolybdate not bound to

Claims (1)

polytetrafluoroethylene. The resulting sorbent is shipped with water. The table lists the characteristics of various sorbent samples. Example 3. Obtaining a sorbent based on potassium cobaltferricyanide. Polytetrafluoroethylene is sintered with cobalt chloride, pre-dried at a temperature, milled and fractionated as in Example 1. The obtained intermediate is treated with a 0.5 M aqueous solution (MF) and washed with water. The exchange capacity of the sorbent containing 10% by weight of potassium cobaltferricyanide is 0.29 meq / g of sorbent. 10 55. 20 Claims of Invention A method of obtaining inorganic sorbents bound by polytetrafluoroethylene, characterized in that, in order to obtain thermally unstable sorbents, having a higher exchange capacity, polytetrafluoroethylene is sintered with one of the thermally stable initial reagents, for example, with a thermally stable substrate, for example, with a thermally stable starting material, such as Trisodium phosphate, with a thermally stable substrate, such as Trisodium Phosphate, with a thermally stable starting material, such as Trisodium Phosphate, with the help of a thermally stable initial reagents, for example, with a thermally stable sorbent, with a thermally stable sorbent, such as Trisodium Phosphate, you must have a tempered fluoroethylene with one of the thermally stable starting reagents, for example, Trisodium Phosphate, with a thermally stable substrate, for example, with a thermally stable starting material, such as Trisodium Phosphate, stitched with a thermally stable reagent, for example, Trisodium Phosphate, with a thermally stable reagent, for example, with a thermally stable sorbents after pre-cooling, the grinding is treated with a solution of the second reagent, for example, neuronyl chloride, potassium fluorocyanide, respectively.