SU1335555A1 - Method of producing fertilizers with microelements - Google Patents

Description

The invention relates to methods for the production of mineral fertilizers, in particular to the production of fertilizers with microelements,

“The purpose of the invention is to increase the strength of fertilizer granules.

PRI and measure 1. 100 g of triammonium hydroxyethyl diphosphonic acid (HEDP) are mixed with 59 g of potassium sulphate, kept for 2 hours at a pressure of 710 mm of water, and then mixed with 1.16 g of boric acid, 29.4 g of copper vitriol, 0, 8 g of ammonium molybdate and ammonium, 1.9 g of cobalt sulphide, 1.9 g of nickel sulphate, 1.9 g of bone meal, 7 g of magnesium stearate, 25 g of talc and pressed. Microfertilizer tablets are obtained strength of 45 kg / cm ..

Example 2. 100 g of HEDP are mixed with 50 g of copper sulphate, 140 g of filler (100 g of bone meal, and 40 g of talc) are added. The mixture after pre-exposure for 12 hours under a pressure of 730 mm of water. tableted

The strength of the obtained granules is 45 kg / cm. Example 3, 100. G HEDP is mixed with 100 g of copper sulphate, 185 g of filler (130 g of dried flour and 55 g of talc) are added / The mixture is tabulated after 12 hours pre-exposure under pressure

 730 mm of water, art. The strength of the finished product 55 kg / cm -.

Example 4 100 g HEDP blend, sewn with 150 g of copper sulphate, 235 g of filler (170 g of bone meal and 65 g of talc) are added. The mixture is tableted after pre-exposure for 12 hours under a pressure of 730 mm aq. Strength of finished

product 55 kg / cm.

Example 5, 100 g of HEDP is mixed with 100 g of copper sulphate, the mixture is kept for 2 hours under a pressure of 730 mm of water, then 185 g of filler (130 g of bone meal 55 g of talc) are added, mixed and tableted. Strength floor

45 kg / cm. one

Example 6. 100 g of HEDP is mixed with 100 g of copper sulphate, the mixture is kept for 12 hours under a pressure of 730 mm aq., Then 185 g of filler (130 g of bone meal and 55 g of talc) are added, mixed and tableted. Strength obtained

I

product 55 kg / cm

Example 7. 100 g. HEDP is mixed with 100 g of copper sulphate, the mixture is kept for 20 hours under a pressure of 730 mm of water, then to; 185 g of filler (130 g of bone meal and 55 g of talc) are mixed, mixed and tableted. The strength of the obtained product is 55 kg / cm.

Etc. and i p 8, 100 i HEDP is mixed with 100 g of copper sulphate, the mixture is kept for 12 hours under a pressure of 710 mm of water column, 185 g of filler (130 g of bone meal and 55 g of talc) are added and mixed . The strength of the obtained product is 55 kg / cm.

Example 9. 100 g of HEDP are mixed with 100 g of copper sulphate, filled for 12 hours under a pressure of 730 mm of water, 185 g of filler (130 g of bone meal and .55 g of talc) are added, mixed and tableted. The strength of the resulting product. 55 kg / cm,

Example 10. 100 g of HEDP are mixed with 100 g of copper sulphate, kept for 12 hours under pressure of 740 mm of water, 185 g of filler (130 g of bone meal and 55 g of talc) are added, mixed and tableted . The strength of the obtained product is 55 kg / cm.

The results of experimental studies in various modes are summarized in tablp 1-3.

40

Spreadsheets

The strength of the tablets, kg / cm

: 0.3

: 0,5

; one . 1.5

1.7

7 45

55 55

55

55

The metal salt is a mixture temperature of 12 hours, a pressure of 730 mm of water column.

table 2

45

55

55

55

 Metal salt. copper sulphate, a mixture temperature of 20 ° C, a pressure above a mixture of 730 mm water column, a ratio of HEDP: metal salt 1: 1.

As can be seen from the table. 1-3, the most favorable for the formation of high-quality tablets of the product (strength above 40 kg / cm) at the minimum cost of metal salts, time and energy for creating a vacuum are the ratio of HEDP: metal salt 1: 0.5-1.5 , soaking time 2-20 hours, pressure 710-740 mm water column With a decrease in the ratio of HEDP and metal salt (less than 1: 0.5), dwell time (less than 2 hours) and an increase in pressure (cBbmie 740 mm water column), the interaction does not fully complete, which does not ensure the required product quality. When the ratio is more than 1: 1.5, time is more than 20 hours and pressure is less than 710 mm B.C. The required quality of the product reaches with the increased costs of raw materials,

 time and energy.

The preliminary mixing of HMDP or its salts with metal sulfate salts allows one to improve the contact of interacting substances by increasing their concentration, in particular, it is effective when mixing solids. The subsequent mixing with fillers does not lead to the destruction of the complexone. The selected ratio of HEDP: metal salt 1: 0.5-1.5 ensures complete interaction without excessive

VNIIPI Order 4018/22 Circulation 407

Random polygons pr-tie, Uzhgorod, st. Project, 4

Its reagent consumption, holding time 2-20 hours, allows the reaction to be completed completely. Pressure 710 - 740 mm of water, Art. ensures unrestricted outflow of the gas phase in case of its formation.

Thus, the proposed method allows the use of HEDP or its salts as a complexing agent to increase the strength of the granules (tablets) of the product.

Table 3

15

25 ao 40

45

50

35

The metal salt is copper sulfate, the mixture temperature is 20 ° C, the exposure time is 12 h, the ratio of HEDP: metal salt is 1: 1.

Claims (1)

1. Method of producing fertilizers with microelements, including the mixing of metal salts with complexing agent - hydroxyethylene diphosphonic acid  or a salt thereof, the introduction of a filler and the subsequent granulation of the mixture, which is different. In order to improve the strength of the granules, potassium, zinc, copper, manganese, cobalt, and nickel sulfates are fed into the complexing agent in a mass ratio of 1.0: (0.5-1.5), respectively, and the mixture is kept before introducing the filler within 2-20 hours at a pressure of 710-740 mm water. 2, a method according to claim 1, characterized in that the mixture is granulated by pressing. Subscription