SU1171420A1 - Zinc-manganese double phosphate-crystalline hydrate used as microfertilizer and method of producing same - Google Patents

Abstract

1. Double zinc phosphate-Maprai. Ca is a crystalline hydrate of the formula Zn2Mn (P04), 0, using & 1st as a microfertilizer. 2. A method of producing a double zinc-manganese suphthalate crystalline hydrate consisting in reacting a mixture of sulphate, chloride, acetate solutions of manganese and zinc salts with a sodium hydrogen phosphate solution at a molar ratio of Zn2: NaiHPO equal to G; 49 1, 54, feed rates of reagents 12 ml / min, pH 5-6 at 60-80 C. with S

Description

The invention refers to the synthesis of double phosphates of bivalent metals, namely, double zinc-manganese phosphates (f), which can be used as micronutrients.

The purpose of the invention is the synthesis of Dink-manganese double phosphate () - crystalline hydrate of the formula ZnjMnCPO) 4H20, which can be used as a micro fertilizer.

Example 1. In thermostatically with. a reactor with water, acidified to pH 5 with diluted H, PO simultaneously with a rate of 1 ml / min, with constant stirring, 2 liters of a 0.5 M solution of salt of sulfate chloride, Zn acetate and 4 liters of solution of 0.5 M solution of sulfate chloride, acetate Zn in parallel with 6 l of 0.335 M solution. (molar ratio is 1.49). The precipitated suspension is removed to the receiver by siphoning. Thereafter, the precipitate is separated from the mother liquor by decantation and filtration, rinsed with water until the anions of the original manganese and zinc salts are absent in the washings and dried at. The product is double zinc-manganese phosphate (m) of formula (PO) -4Н20. The output of double phosphate 86%. The resulting compound can be used as a micronutrient.

Example 2. To a small amount of water, acidified to pH 5.5, at 70 ° C at a rate of 1 ml / min, simultaneously with parallel feed, 600 ml of a 0.33 M solution of Na2HP04 and the amount of 0.5 M solutions of sulfate salts are poured with constant stirring, 200 ml of manganese chloride and acetate, and 400 ml of zinc. In the deposition process, the molar ratio is 1 Mp,

Zn is maintained at 1.52. The remaining operations are carried out according to Example 1. The resulting product is zinc-manganese double phosphate (s) of the formula Zn MnCPC) 4H202. The output of double phosphate 92%. The resulting compound can be used as a micronutrient.

Example 3. When parallel flow at a rate of 2 ml / min in a thermostated at the reaction vessel with water, acidified to pH 6

a mixture consisting of 3 l of 0.5 M manganese salt solution and 6 l of 0.5 M zinc salt solution and 9 l of 0.325 M sodium hydrogen phosphate solution (molar ratio 1.54) precipitated the product Zn2Mn (PO) 24Н20.

Further operations are carried out according to Example 1. ZnjMn (PO) 2-4H20 yield 89%. The resulting compound can be used as a micronutrient.

The synthesis of zinc-manganese double phosphate crystalline hydrate (s) is carried out while keeping the following precipitation parameters constant, the concentration of the initial reagents is 0.5 M molar ratio in the precipitation process 1 ,, jHP04 1.49-1.54, pH 5-6 and the temperature during the synthesis 60-80 C, the feed rate of the reactants is 12 ml / min and the continuous management of the process at which you can get any necessary quantities of this product.

Example 4. The interaction of a mixture of 0.5 M solution of MnSO chloride, acetate and 100 ml of 0.5 M solution of ZnSO chloride, acetate with 300 ml of 0.335 M solution of Na2HP04 at pH 5-6 and a reagent feed rate of 12 ml / min gives the product of the composition lMn2Zn (PO) 2-4H20,

Example 5, With simultaneous feeding at a rate of 3 ml / min, a mixture of 0.5 M solutions of manganese and zinc salts in a ratio of 1-2 and maintaining the process at pH 6.5 receive the product of the composition). 2: (70) 2 admixture.), 0.

The physicochemical analysis of the obtained compound (Examples 1-3) indicates the formation of an individual chemical compound of a specific composition, specifically ZnjMn (PO), j 4H20. This is confirmed by chemical analysis and specially carried out X-ray phase analysis of the synthesized orthorhombic gopeite Zn (PO) 2 and the proposed Zn2Mn (P04) 2. 4HjO.

The table shows the effect of the addition of zinc-manganese double phosphate ((i) of the crystalline hydrate on the increase in the green mass of corn.

(PO)

Zn2Ca (PO) 22H20

0.2 0.3

6.0 0.6 0.4 0.2

3.2 0.1

Claims (2)

1. Double zinc phosphate margate. yes - crystalline hydrate of the formula Zn ₂ Mn (P0 ₄ ) ₂ '4H, 0, used as microfertilizer. 2. A method of producing a double zinc-manganese sulfate - crystalline hydrate, which bites in the interaction of a mixture of sulfate, chloride, acetate solutions of manganese and zinc salts with a solution of sodium hydrogen phosphate at a molar ratio of TMP ²⁺ , Zn ²⁴ : Na ₂ HP0 ₄ equal to 1749 1.54 , the feed rate of the reagents 12 ml / min, pH 5-6 at 60-80 ° C. .