SU1386560A1 - Method of producing phosphorus-containing solutions for preparation of fodder phosphates and fertilizers - Google Patents

Abstract

This invention relates to a process for the production of inorganic compounds used in the preparation of feed phosphate and mineral fertilizers. The aim of the invention is to reduce the acidic reagent and lower the fluorine content of the E solution. The method is carried out by acid decomposition of phosphorus-containing raw materials with 30-50% water condensate of the oxidation process of liquid paraffins with subsequent separation of sludge, and decomposition of phosphorus-containing raw materials is carried out in the presence of boron-containing raw materials containing oxides of boron, calcium, magnesium and sulfur, with the ratio of solid phases and liquid 1: 4-100 and boron-containing raw materials and phosphorus-containing 1: 3-9. The water condensate of the liquid paraffin oxidation process contains formic, acetic, propionic and butyric acids. The joint decomposition of phosphate and boron-containing raw materials with organic acids makes it possible to reduce the amount of acid reagent by 5–7 times and to reduce the fluorine content in solution by 18–20 times. 2 hp f-ly, 2 tab. S cl

Description

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This invention relates to a process for the production of inorganic compounds used to prepare feed phosphate and fertilizers for agricultural crops.

The purpose of the invention is to reduce the amount of acid reagent and the fluorine content in solution.

13865602

PRI me R 4. 2.25 g of phosphorus-containing raw material AND 0.25 g of boron-containing raw material are treated with a 50% solution of aqueous condensate from the process of oxidizing liquid paraffins (the components of the decomposition process are the same as Example 1) at the boiling point at

PRI me R 1. 0.75 g phosphorusodera-Q for 3 hours. The solution is further filter-containing raw material composition, wt.%: 26.0-26.65 CaO 39.5-39.8; MgO 1.86-1.90; F 1.2-1.3; , 3.20-33.12, and 0.25 g of boron-containing raw material composition, wt.%: BjO, 15.72; GaO 19.52; MgO 12.65; SO, 24.33; water .. - the rest is treated at T: L - 1: 100 with a ZP% solution of aqueous condensate of the process of oxidizing liquid paraffins of composition, wt.%: formic acid 44.3 acetic acid 25.7; propionic acid 18.6; butyric acid 11.4; water - the rest, for 3 hours at the boiling point. The solution is then separated from the insoluble portion by filtration. The degree of decomposition of the components is, in May,%: 98.5; VgOe 98.4; F 0.23. The fluorine content in the decomposition solution is 0.00022 mg / l.

EXAMPLE 2 2.25 g of phosphorus-containing raw material and 0.25 g of boron-containing raw material at T: W 1; 40 are treated with a 30% solution of aqueous condensate from the process of oxidizing liquid paraffins

separated from the insoluble part. The degree of decomposition of the components is, wt.%: 98.5; B, O, 99.0; F 0.24. Fluorine content

5 in a decomposition solution of 0.00066 mg / l. Example5. O, 75 g of phosphorus-containing raw material and 0.25 g of boron-containing raw material composition, wt.%:, 14.93; CaO 18.87; MgO 12.47; SO,

20 23.58; water - the rest is treated at T: W 1: 100 with a 30% aqueous solution of a water condensate of the process of oxidizing liquid paraffins of composition, wt%: formic acid 26.0; vinegar

25 acid 13.0; propionic acid 8.0; butyric acid 3.0; water - the rest, at the boiling point of about 3 h. The solution is further filtered off from the insoluble.

2Q parts. The degree of decomposition of the components and the fluorine content in the decomposition solution are similar to Example 1.

PRI me R 6, 2.25 g of phosphorus-containing raw materials and 0.25 g of boron-. raw materials when processed

(the composition of the process components is decomposed by a 30% solution of aqueous condensate

nor is analogous to Example 1) at a boiling point for 3 hours. The solution is then filtered off from the non-separable portion by filtration. The degree of corruption of coyunts is, MAC |,%; P, 0j 98.5; 95.1; F 0.23. The fluorine content in the decomposition of decomposition is 0 00067 mg / l.

Example 3, 0.75 g of phosphorus-containing raw materials and 0.25 g of boron-containing raw materials at T: W 1: 100 are treated with a 50% solution of aqueous cb condensate of the oxidation process of liquid paraffins (the components of the decomposition process are analogous to example 1) at the boiling point within 3h The solution is then separated from the insoluble portion by filtration. The degree of decomposition of the components is, wt.%: PjOj 99.0; 8.0.3 098.6 {F 0.25. The fluorine content in the decomposition solution is 0.00024 mg / l.

separated from the insoluble part. The degree of decomposition of the components is, wt.%: 98.5; B, O, 99.0; F 0.24. Fluorine content

in a decomposition solution of 0.00066 mg / l. Example5. O, 75 g of phosphorus-containing raw material and 0.25 g of boron-containing raw material composition, wt.%:, 14.93; CaO 18.87; MgO 12.47; SO,

23.58; water - the rest is treated at T: W 1: 100 with a 30% aqueous solution of a water condensate of the process of oxidizing liquid paraffins of composition, wt%: formic acid 26.0; vinegar

acid 13.0; propionic acid 8.0; butyric acid 3.0; water - the rest, at the boiling point of about 3 h. The solution is further filtered off from the insoluble.

parts. The degree of decomposition of the components and the fluorine content in the decomposition solution are similar to Example 1.

PRI me R 6, 2.25 g of phosphorus-containing raw materials and 0.25 g of boron-. raw materials when processed

30% aqueous condensate solution

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the oxidation process of liquid paraffins (the composition of the components of the decomposition process is the same as Example 5) at a temperature; boiling for 3 hours. The solution is then filtered off from the insoluble part by filtration. The degree of decomposition of the components and the fluorine content in the decomposition solution are similar to Example 2 "

Example 7, 0.75 g of phosphorus-containing raw material and Oj25 g of boron-containing raw material at T: W 1: 100 are treated with 50% pacTBOpoiM of water condensate of the liquid paraffin oxidation process (composition of the components of the decomposition process is similar to Example 5) at boiling temperature for 3 hours . The solution is then separated from the insoluble portion by filtration. The degree of decomposition of the components and the fluorine content in the decomposition solution are similar to Example 3.

II p i me r 8. 2.25 I phosphorus-containing raw material and 0.25 g of boron-containing raw material are treated with a 50% solution of water condensate of the liquid paraffin oxidation process (composition of the components of the decomposition process as in example 5) at the boiling point 3 h. The solution is then separated from the insoluble part by filtration. The degree of decomposition of the components and the fluorine content in the decomposition solution are similar to Example 4.

The indicators of the process of acid decomposition of phosphorus-containing and boron-containing are presented in Table 1.

When carrying out the process according to a known method, the phosphorus-containing raw material is treated with an aqueous condensate of the decomposition process at a boiling point for 3 hours. The degree of decomposition of the raw material is 70%, the fluorine content in the raw material is 3.3%.

The indicators of the process of acid decomposition of phosphorus-containing raw materials by a known method are given in table 2.

When processing phosphate raw materials with 33-36% acidic reagent at a T: W ratio of 1: 300-500 at a boiling point for 5 hours, the degree of decomposition equals 97.5-100%, fluorine 4%.

The given examples show that the joint decomposition of phosphorus-containing and boron-containing raw materials reduces the amount of acidic reagent by 5-7 times and the fluorine content in solution by 18-20 times. The effect is determined by the content in the boron feedstock, which contributes to the creation of a complex salt composition, increases

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overall solubility of phosphorites and reducing the degree of decomposition of fluorine.

The obtained phosphorus-containing solution without an additional purification step from fluorine can be used to obtain feed phosphate and fertilizers for agricultural crops.

Claims (3)

1. A method of obtaining a phosphorus-containing solution for the preparation of feed phosphates and fertilizers by acid decomposition of phosphorus-containing raw materials by water condensation of the process of oxidizing liquid paraffins with subsequent separation of the slurry, due to the fact that, in order to reduce the amount of acidic reagent and fluorine content in the solution, decomposition phosphorus-containing raw materials are carried out in the presence of boron-containing raw materials with a solid-liquid ratio of 1: 40-100 and boron-containing raw materials to phosphorus-containing 1: 3-9. 2. Method POP1, characterized in that for the decomposition of phosphorus-containing raw materials use 30-50% water condensate of the process of oxidation of liquid paraffins composition, in May.%: Formic acid 26.0-44.3 Acetic acid 13.0-25.7 Propionic acid 8.0-18.6 Oil acid 3.0-11.4 Water. Rest 3. A method according to claim 2, characterized in that during decomposition, boron-containing raw materials of the following composition are used, wt%: B ,, 0e, 14.93- 15.72; CaO 18.87-19.52; MgO 12.47 - g2.65; 23.38-24.33; water - the rest. Table 1 Table 2