CC BY
0
COMPOSITION HUMIC SIMPLE SUPERPHOSPHATE BASED ON LICORICE MEAL AND PHOSPHORITES OF KARAKALPAKSTAN Orakbaev A.A.1, Namazov Sh.S.2, Usanbayev N.Kh.3, Kurbaniyazov R.K. 4
(Republic of Uzbekistan)
1Azamat Amanbaevich Orakbaev - PhD student, KARAKALPAK STATE UNIVERSITY NAMED AFTER BERDAKH;
2Shafoat Sattarovich Namazov - Doctor of Technical Sciences, academician, head of the Phosphate Fertilizer LABORATORY
OF INSTITUTE OF GENERAL AND INORGANIC CHEMISTRY;
3Najimuddin Khalmurzaevich Usanbayev - Doctor of Technical Sciences, chief scientific researcher, Deputy Director for
Science of Institute of General and Inorganic Chemistry; 4Rashid Kalbaevich Kurbaniyazov - PhD, docent, Dean of the Faculty of Industrial and Technology, KARAKALPAK STATE UNIVERSITY NAMED AFTER BERDAKH; THE ACADEMY OF SCIENCES OF THE REPUBLIC OF UZBEKISTAN, TASHKENT, REPUBLIC OF UZBEKISTAN
Abstract: this scientific article presents the results of a study aimed at studying the processes of production of humic simple superphosphate. This type of superphosphate is obtained from oxidized meal of naked licorice and decomposition products of phosphate raw materials extracted from the Porlytau deposit in Karakalpakstan. When the oxidized meal is added to the acidic superphosphate mass before ammonification and drying, the usual decrease in the content of digestible forms of P2O5 does not occur.
Keywords: fertilizers, meal, hydrogen peroxide, phosphorite, extractives, sulfuric acid, oxidation.
СОСТАВ ГУМИНОВОГО ПРОСТОГО СУПЕРФОСФАТА НА ОСНОВЕ ШРОТА СОЛОДКИ И ФОСФОРИТОВ КАРАКАЛПАКСТАНА Оракбаев A.A.1, Намазов Ш.С.2, Усанбаев Н.Х.3, Курбаниязов Р.К.4
(Республика Узбекистан)
1Азамат Аманбаевич Оракбаев - базовый докторант, Каракалпакского государственного университета имени Бердаха;
2Намазов Шафаат Саттарович - доктор технических наук, академик, заведующий лаборатории «Фосфорные
удобрения»;
3Нажимуддин Халмурзаевич Усанбаев - доктор технических наук, главный научный сотрудник, заместитель
директора по научной работе ИОНХАН РУз;
4Рашид Калбаевич Курбаниязов - PhD, доцент, декан факультета промышленных технологий Каракалпакский
государственный университет имени Бердаха;
Институт общей и неорганической химии Академии наук Узбекистан, г. Ташкент, Республика Узбекистан
Аннотация: в данной научной статье были представлены результаты исследования, направленного на изучение процессов производства гуминового простого суперфосфата. Данный вид суперфосфата получен из окисленного шрота голой солодки и продуктов разложения фосфатного сырья, добываемого из месторождения Порлытау в Каракалпкстане. При добавлении окисленного шрота в кислую суперфосфатную массу перед аммонизацией и сушкой не происходит обычное снижение содержания усвояемых форм Р2О5.
Ключевые слова: удобрения, шрот, пероксид водорода, фосфорит, экстрактивные вещества, серная кислота, окисление.
Currently, numerous countries worldwide are facing a significant agricultural challenge linked to the shortage of phosphorus fertilizers. The production of such fertilizers relies on the availability and quality of phosphorus-containing raw materials. However, the high cost and limited reserves of these materials necessitate the utilization of low-phosphorus raw materials and the enhancement of their efficiency in phosphorus fertilizer production.
At present, the most widely used phosphorus-containing fertilizer worldwide is ordinary superphosphate, which primarily consists of water-soluble calcium monophosphate (Ca(H2PO4b). It is obtained through the processing of phosphate raw materials with sulfuric acid.
Furthermore, it is worth noting that humic fertilizers hold significant and long-term importance in ensuring stable and high-quality crop yields in agriculture. When utilizing organomineral fertilizers, in addition to enriching the soil with essential plant nutrients, they also serve as a source of humic substances, which contribute to soil fertility preservation.
Given the above, the objective of this study is to analyze the production processes of humic fertilizer based on oxidized licorice meal and the decomposition products of phosphate raw materials.
In [1], the possibility of obtaining humic superphosphates from phosphorites of the Khojakul deposit of Karakalpakstan was studied. Porlytau Sulfuric acid with a concentration of 92% was employed to activate the
phosphate raw materials. As for the organic component, oxidized licorice meal was utilized, obtained through hydrogen peroxide oxidation.
In the initial stage of investigating the process of obtaining humic simple superphosphate, the phosphate raw materials were subjected to sulfuric acid decomposition to convert the non-assimilable form of P2O5 into a plant-available form. Subsequently, the oxidized licorice meal was introduced into the resulting mixture after the completion of the decomposition process. The mixture was thoroughly mixed, neutralized, and then subjected to drying at a temperature of 80°C. Granulation was achieved through the ammoniation and drying process. Following drying, the chemical composition of the fertilizers was analyzed.
The higher the sulfuric acid dosage and the lower the amount of phosphate raw material used, the lower the total P2O5 content in the product, but the higher the relative content of plant-available P2O5. When the ratio of phosphate rock to oxidized licorice meal is 1:0.4 and the sulfuric acid dosage is 30% below stoichiometry, humic simple superphosphate is obtained with the following composition (wt. %): total P2O5 - 10.34; relative content of plant-available P2O5 based on citric acid - 76.88.
At a meal to phosphorite ratio of 1:0.4 and a sulfuric acid dosage equivalent to 10% of the stoichiometry required for monocalcium phosphate formation, the resulting humic superphosphate has the following composition (weight %): total P2O5 - 10.98; P2O5 soluble in citric acid - 6.25; P2O5 soluble in trilon B - 5.13; organic substances -25.77; exchangeable bases (EV) - 9.58; nitrogen - 0.78; moisture content - 18.94. The relative content of P2O5 soluble in citric acid is 56.92.
X1 o4
06 ГЛ
CS
'S
-Si ci о
Pi
100
90
80
70
60
50
■The norm of sulfuric acid-10% -The norm of sulfuric acid-30% The norm of sulfuric acid-50%
■The norm of sulfuric acid-20% The norm of sulfuric acid-40%
1:0 1:0.2 1:0.4 1:0.6 1:0.8
THE MASS RATIO OF PHOSPHORITE:MEAL
1:1
Fig.1. The relative content of the digestible form of P2O5 in humic superphosphates at the ratio phosphorite:meal = 1:(0-1) and
the norm of sulfuric acid.
Furthermore, when the acid dosage is increased to 50% while maintaining the same meal to phosphorite ratio, the resulting fertilizer composition (weight %) is as follows: total P2O5 - 9.79; P2O5 soluble in citric acid - 9.02; P2O5 soluble in trilon-B - 5.94; organic substances - 23.17; exchangeable bases (EV) - 8.61; nitrogen - 2.71; moisture content - 16.89. The relative content of P2O5 soluble in citric acid is 92.13.
The production of humic superphosphate involves the addition of oxidized licorice meal to the acidic superphosphate mass. Its application in agriculture leads to an increase in soil humus content, as well as improvements in soil structure and physico-mechanical properties. The presence of essential nutrients in humic superphosphate promotes increased crop yield and improved crop quality.
Consequently, the utilization of humic superphosphate offers several beneficial effects in agriculture, including enhanced soil fertility and optimized plant growth, resulting in increased agricultural productivity.
References / Список литературы
1. Orakbaev A.A., Namazov Sh.S., Usanbayev N.Kh. Composition humic simple superphosphate based on licorice meal and phosphorites // XCII international correspondence scientific and practical conference «International scientific review of the problems and prospects of modern science and education» Paris. France. November 17 -18, 2023. 5-7 pp.
