SU71632A1 - Method for producing metaphosphates - Google Patents

Description

Phosphorus vapors and water vapors, heated to high Tc-Mnsrappra, in the order of 1000 ° C, react with each other to form phosphorus and hydrogen. A number of substances catalyze this process. So, in the presence of chalk, phosphate or other, oxidation of phosphorus (} Jurassic flow takes place at a temperature of -4СК) - 600 C. Takna substances, clk chalk I phosphorite, absorb to form 4nx: 4) Ornanoic acid with B; metaphosphateB.

Usually, a heterogeneous gas kata.-1113 is realized, 1 by passing gas s.sches through a layer of granular catalysts. Phosphorus o-scaling with oKiic-ieHiHi (| humoric acid reacts with a catalyst, forming L1eta} yus (} | ata, which results in C1; Osphorites, chalk, etc., it is necessary for them to conduct the process of their saturation in 11.1.There is a shortage of irides to “Brazov1H1Yu 6o.iee cKiioiiJiiJX, for example, fats.

In addition, (calcium, half a day and 1 hp at a temperature below 1000 C. differs in extremely low solubility and, therefore, cannot be used as fertilizer. Acquired metaphosphates are obtained at a temperature above lOOO-C, but maintaining such temperatures All contact apparatus, especially the aggressive properties of phosphoric acid, turned out to be extremely sluggish.Therefore, the process is divided into two in the first - with a tel pepper of 600-700 ° C, an oxidation process should occur, The process of melting. / In order to ensure the rapidity and completeness of the conversion of phos (}) orite, mecha, etc. into l; eta (| yus4) atm, it is necessary to use them and it is. Producing gas through a layer of m} -kp of increased energy consumption II has a number of other inconveniences. The way out of this position is the removal of the catalyst into atmospheric (|) re-heating gases.

Prior to oxidation of vapors (j)) pa with water vapor in the presence of chrysanthemums and absorption

substances with meta-yus (|) ativ, differing in the term that at a temperature of up to the required temperature on the 1 ap1ik-ka.Chru at the same time, the heating of the phosphorus pair, the fumes of the II finely divided catalysing and pigmentation, which are blown in such a way as to effect a countercurrent in the Gaiiiue. The substance is collected at the bottom of the tower-chamber and melts due to the additional source of heat derived from combustion (for example, with strictly theoretical oxygen (air)). You can also use combustible varieties It is advisable, since the combustion of phos (JKipa will give a yoacuchiness to extrude the comdiscipine product according to the content () of os (() gohydric anhydride and, moreover, the nitrogen-iodorodia gas mixture. Example: through superheated steam is supplied . In the steam line: the heated preheated water is dispensed from the heater:; ator-P (pharynx Itelfort, Mel'n t. ti. A mixture of vapors (}) of osphorus and others is fed into the tower-chamber through a tube. Water-borne vapors are taken in excess.

In the gas phase, in the tristate of the sprayed catalyst, the interaction of phosphorus with steam occurs.

water with the formation of megaphosphate. The solid reaction products are deposited on the aio chamber, where they are exposed to water and are periodically released in molten form.

In this apparatus, it is also desirable to initiate the oxidation of phosphorus, which is directly introduced into the apparatus in the form of phosphorus-containing gases, evolved from electric and MeHiUJX furnaces for the sublimation of phosphorus.

Subject invention

The method of producing metaphos (}) atoms by oxidation at high temperature of phosphorus vapors with water vapor in the presence of catalysts, is at the same time absorbed by many of the phosphoric acid produced, chalk, phosphorite, and others. So with the fact that with the acceleration of the process into the heated to the required temperature, simultaneously with the introduction of vapors of phos () jura or sporiferous gases and water, the crushed catalyst and the resulting solid product of the reaction are injected, the settling on the bottom is melted in the same chamber, for example, at t heat oxidation (combustion) of phosphorus theoretical amount of oxygen.