SU1049461A1 - Method for producing superphosphate - Google Patents

Abstract

1. METHOD OF OBTAINING SUPERPHOSPHATE enriched with microelements, including the decomposition of the feed stock with sulfuric acid, the post-absorption of micro-acidic solutions; elements and maturation of the product, compared with the fact that, in order to reduce the consumption of sulfuric acid and increase the degree of decomposition of phosphate raw materials while simultaneously intensifying the process by reducing the maturation of the product, solutions of manganese-containing, boron-containing and molybdenum-containing compounds in the hydrofluoric acid are used as acid solutions concentration of 5-12%. 2. The method according to claim 1, characterized in that the boron-containing compound is dissolved in silicofluorocarbonate to a boron content of 0.6-0.75%, the manganese-containing compound is (L to a manganese content of 3.8-5.9%, the molybdenum-containing compound is up to 0.4-0.5% molybdenum containing. 3. The method according to claims 1 and 2, characterized in that an acid is used as the boron-containing compound. 4. The method according to claims 1 and 2, o t l and h 4 and the fact that as mOCO 4 of a libdene-containing compound, use is made of electrolamp production, O5 containing 5-8% molybdenum.

Description

Isob kegspie spspc to the superphosphate puffing process; enriched with trace elements, social development. The claimed forms of Kenya's various micrographs required for plants.

A known method for producing micro-element superphosphate 5 is socially. j the molybdenum necessary for plants is as follows: h; raw; the raw materials are decomposed with spent sulfuric acid, into which the molybdenum-containing solution is introduced in a ratio of Is4.5-5 | 5, and waste is used as the molybena-containing solution Electrical production of ClJ The disadvantage of this method is that the finished product contains only one nutrient mr-sra element - molybdenum and the degree of raw material decomposition does not exceed 94%.

A known method for producing granulated superfoss ata enriched with microelements (manganese, zinc, boron and ap.), Where the microelemaggi-sootseer is injected into a mixture with neutralizing no6aBJcoE followed by granulation and:;

The disadvantages of this method are;

the possibility of using it only to obtain granulated super phosphate, whose share in the production of superphosphate is only 30% j

salts of microelements in the process of high temperature drying are transformed in the water solubilisable, difficult to assimilate form

the introduction of mi1; roepements in superfoo- phat at the stage of neutralization of the auspices, em irregularly distributed in the product. I.

The closest technical

The essence and the achieved result to the offered is the method of obtaining. and superphosphate enriched with microelements, where the phosphate raw materials are first lagged with sulfuric acid, taken as J3 of the total amount of acid required for decomposition. the rest, in the form of a sulfuric acid solution containing 4–6% of vanadium soups (concentration and pentooxide. vanadium 1.27–1.87%), 2.3–5% manganese sulfate (manganese concentration 0.9 1 , 8%), administered 15-25 minutes after the start of decomposition. At the same time, the coefficient (}) of icium- | vnt of decomposition of the raw material is 95 D ™ 96.7%. On the decomposition of phosphate sy

Sulfuric acid is also used to produce solutions of microadditives. The maturation period of the product is 15 days. The disadvantage of this method is the increased consumption of sulfuric acid, the degree of decomposition of phosphate raw materials is not high enough, and the relatively long maturation period of the finished product,

 The aim of the invention is to reduce the consumption of sulfuric acid and increase the degree of decomposition of phosphate raw materials while simultaneously intensifying the process by reducing the time of ripening.

- product.

The goal is achieved by the fact that according to the method of obtaining superphosphate enriched with microelements, including the decomposition of phosphate raw materials

 sulfuric acid, the subsequent introduction of acidic solutions of microelements and the maturation of the product, where manganese-containing solutions are used as acidic solutions;

 molybdenum-containing compound in fluorosilicic acid with a concentration of 5-12%,

In addition, the boron content in the solution is 0.6-O, 75.%, The content of molybdenum in the solution is 0.4–0.5%, the content of manganese in the solution is 3.8-5.9%, and the use as boron-containing compound is boric acid containing 99.6%, use as

5 molybdenum-containing compound - waste of electrical production, containing 5-8% molybdenum.

l

Example 1. A porcelain cup with a capacity of 600 ml is poured with 53 ml of 75% sulfuric acid (which is 95% of the total amount of acid required to decompose apatite), heated to 55 ° C, 100 g of apatite concentrate are poured out, 1, 7 g of boric acid containing 99.6% of HBVO, 2.9 g of molybdenum O-containing powder containing 5% Mo, waste of electric-tube production and 13) manganese sludge; tava:

0 Mp total 5.9 - 35.2; Mp w / p 2.0-3.78; Ml 1.69-0.14; M.P. 1.69-28.7; Moisture 25.1 - 4O, 6, dissolved in 30 ml of 5 ° / ary fluorosilicic acid at 55 ° C for 15 minutes. The resulting solution containing 0.6% B;

0.4% Mo; 3.8 Mp were thoroughly mixed into the reaction mass of about 2O minutes after the introduction of the apatite concentrate. The resulting mass is stirred for another 5-8 minutes. and a porcelain cup with a superphosphate mass is placed in a thermostat in which the temperature is 10 ° -115 ° C, for 2 hours. Then the product is removed from the thermostat and cooled. The resulting product contained (after 13 days of aging), wt.%; : PjO 19.65; PgOy in p. 18.7; , moisture 8.2; B 0.152} Mo 0.110;

MP 1.09; .zl-97.2.

Example 2 The experiment was carried out analogously to example 1. The resulting product (after 12 daily ripening) contains, by weight,%: P2% cc. p. 18.45; PgOj- cBof 5,8j moisture 7,7; B 0.197; Mo 0.132; Mn 1.54

Example 3 The experiment was carried out analogously to example 1. The resulting product (after 12 daily ripening) contains, in wt%: P2 -5vce 19t4} 0. p. 8.5; P20fceo6 5.6; moisture 7.5; B 0.246} MQ 0.156; Mp 1.92.

The table shows the rationale for the selected process parameter intervals.

95

92

90

90

95

90-95

0.85 90-95

Oh, 6th, 7b Oh, 3

5-12

I

5-12 0.6-0.75 0.4-0.5

90-95

100

3.8-5.955-6515-4О 0.6

3, O 55-6515-4 O

6.5

0.9-1.860-7515-60

Table continuation

Claims (4)

1. METHOD FOR PRODUCING SUPERPHOSPHATE enriched with microelements, including decomposition of phosphate raw materials with sulfuric acid, subsequent introduction of acidic solutions of micro-elements and aging of the product, characterized in that, in order to reduce the consumption of sulfuric acid and increase the degree of decomposition of phosphate raw materials during simultaneous intensification of the process by reducing the ripening period of the product, solutions of manganese-containing, boron-containing and molybdenum-containing compounds in silicon are used as acid solutions hydrofluoric acid with a concentration of 5-12%, 2. The method of pop. 1, characterized in that the boron-containing compound is dissolved in hydrofluoric acid to a boron content of 0.6–0.75%, the manganese-containing compound to a manganese content of 3.8-5.9%, the molybdenum-containing compound to a molybdenum content 0.4-0.5%. 3. The method according to PP. 1 and 2, characterized in that, as a boron-containing compound, boric acid is used. 4. The method according to PP. 1 and 2, I am distinguished by the fact that as a molybdenum-containing compound, electric lamp waste containing 5-8% molybdenum is used. SU .... 1049461