SU1604813A1 - Method of producing mineral-organic fertilizer - Google Patents

Abstract

The invention can be used in the chemical industry in the production of organic fertilizers based on poultry manure. In order to increase the stability of the resulting organic fertilizer to moisture, increase the strength of fertilizer granules and reduce its cost, phosphate rock is treated with 35-60% aqueous solution of sulfuric acid in the presence of ammonium sulfate, with stirring. Potassium sulfate, dry bird droppings and spent ammonia production catalysts are added as trace elements. The mixture is stirred and tableted. The ratio of the components of the following, wt.%: Dry poultry manure 29,9-49,9

potassium sulfate 8-10

ammonium sulfate 21-30

phosphorite flour 21-30 and trace element rest. 1 tab.

Description

The invention relates to the production of fertilizers and can be used in the chemical industry in the production of organic fertilizers.

The purpose of the invention is to increase the strength of the granules and increase the resistance of the fertilizer to moisture.

Example 1. 30 wt.% Ammonium sulphate o / phosphate rock and 10 May. % 35X, -sulfuric acid is stirred at ambient temperature in a mixer for 40 minutes (pH of the mixture 3.5). Add 10 MU. L of potassium sulphate. 29.9 wt.% Dry bird droppings (calculated on the absolutely dry weight) 10% humidity and 0.1 May% of spent catalysts (the ratio of GIAP-10-PS: GIAP-10-2: AKM 50:30:20 ) as trace elements. The mixture is stirred and tableted.

Sulfuric acid is used for the treatment of phosphate rock, which is a waste product of vinyl chloride and

85-88

3-5

polyvinyl chloride. which is used in the above-mentioned industries for the purification of acetylene from its homologues and diene hydrocarbons and has a composition, wt.%: Sulfuric acid Organic substances (products of polymerization of acetylene impurities)

For the treatment of phosphorus flour, sulfuric acid is diluted 2-2.5 times. The spent ammonia production catalysts have the following composition, in May,%

GIAP-10-2

ZnO55.5

ZnS18.5

CuO10.0 ± 1

Moisture 5.0

A120z Else

GIAP-10-PS ZnO63.0

ZnS27.0

Os

ABOUT

00

MgO .6,5t1,0

Moisture

AKM (aluminobaltmolybdenum) in terms of hydroxide, wt.%: CobaltUp to 4.0

Molybdenum up to 12.0

MoistureUp to 5.0

Alumina Rest Example 2.21% by weight of ammonium sulfate, 21% by weight of phosphate rock and 10% by weight of 40% sulfuric acid are stirred at ambient temperature in a mixer for 30 minutes (pH of the mixture is 3.5). 8.0 wt.% Potassium sulphate, 49.9 wt.% Dry bird droppings (calculated on absolutely dry weight) 10% moisture and 0.1 wt.% Spent catalysts are added (ratio GIAP-10-PS; GIAP-10-2: AKM 50:30:20) as micronutrients. The mixture is stirred and granulated.

PRI me R 3. 25.7 wt.% Ammonium sulfate, 25.7 wt.% Phosphate rock and 12 wt.% 37% sulfuric acid is stirred for 35 min at ambient temperature in the mixer (pH of the mixture 3, five). 8.6% by weight of potassium sulfate, 39.9% by weight of dry bird droppings (calculated on absolutely dry weight) of 10% moisture and 0.1% by weight of spent catalysts are added (ratio GIAP-10-PS: GIAP-10-2: AKM 50:30:20) as micronutrients. The mixture is stirred and tableted.

 Example 4. 34.3 wt.% Ammonium sulfate, 34.3 wt.% Phosphate rock and 11.5 wt.% 35% sulfuric acid are stirred at ambient temperature in a mixer for 35 minutes (pH 3.5). 11.4% by weight of potassium sulfate, 19.9% by weight of dry bird droppings of 10% moisture and 0.1% by weight of spent catalysts as trace elements are added. The mixture is stirred and tableted.

. Example 5. 16.6 wt.% Ammonium sulfate, 16.6 wt.% Phosphate rock, 7.5 wt.% 40% sulfuric acid are stirred at ambient temperature for 35 minutes (pH of the mixture is 3.5). 6.8% by weight of potassium sulfate, 59.9% by weight of dry manure and 0.1% by weight of spent catalysts are added. The mixture is stirred and tableted.

The chemical composition, the results of the analysis of the absorbable form of phosphorus, the mechanical strength of fertilizers, and the resistance to moisture are given in the table.

With an increase in the content of mineral components (Example 4), the content of basic nutrients (nitrogen, phosphorus, potassium) increases. The content of the absorbed phosphorus form, the mechanical strength and the percentage of nutrient recovery over 30 minutes almost remain at the same level as in Example 1, but the protein content is significantly reduced. The increase in mineral components in fertilizer impairs nutritional properties. cereals, potatoes and other crops, and therefore an increase in the nutrient content of fertilizers is not advisable.

An increase in organic components in fertilizer (Example 5) leads to an increase in protein content and an assimilable form of phosphate, since in bird droppings 5 phosphorus is in an assimilable form, but the total nutrient content does not exceed 18.5%, while the mechanical strength of the fertilizer decreases dramatically due to a small amount of phosphate flour containing gypsum as a binder and a larger amount of organic matter.

A concentration of sulfuric acid below 30% increases the moisture content of the tabletting mass, which increases the cost of the process. A concentration of 5% sulfuric acid over 40% reduces the required moisture of the tableted mass, which needs to be moistened, which is economically disadvantageous. The amount of sulfuric acid depends on the amount of phosphorus flour and is chosen in such a way as to establish a pH of 3.5.

The proposed method allows to obtain a fertilizer with high agrochemical properties even with an insignificant 5 doses of its application (1 kg / ha). The yield of barley increased in comparison with nitrophoska and in comparison with organic fertilizer prepared by simple mixing of the raw material. The agrochemical effect of the fertilizer obtained by a known method is at the level of nitrophoska.

Claims (2)

1. A method of producing organic fertilizer, comprising mixing bird droppings with phosphorus, nitrogen and potassium-containing components, characterized in that phosphorite flour is used as a phosphorus-containing component in order to increase the strength of the granules and increase the resistance of the fertilizer to moisture. , as the nitrogen-containing component is ammonium sulphate and as the potassium-containing component is potassium sulphate, and ammonium sulphate and phosphate flour are pretreated with a 35-40% aqueous solution of sulfuric acid for 30-40 minutes, and then the rest of the components are added, and additionally a microelement additive is added the following ratio wt.%: Dry bird droppings Potassium sulphate Ammonium Sulphate Phosphoritic Flour Trace element supplement 2. A method according to claim 1, characterized in that spent ammonia production catalysts are used as the micronutrient additive. Table continuation