Wyniki wyszukiwania - BazTech

1

Utilization of waste gypsum in fertilizer production

Malinowski P., Borowik M., Wantuch W., Urbańczyk L., Dawidowicz M., Biskupski A.

Polish Journal of Chemical Technology

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2014

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Vol. 16, nr 1

45-47

EN

The results of the study regarding utilization of the waste gypsum formed as a by-product during the production of the magnesium sulphate from dolomite have been presented. The use of this waste have been proposed for the production of granulated multi-component fertilizers containing 25% N; 8% S; 14% CaO and 3.5% MgO. In the process of fertilizer production, the urea which will be bounded with the calcium and magnesium sulphate from the waste in the form of adducts of CaSO4 . 4CO(NH2)2 and MgSO4 . CO(NH2)2 . 3H2O will be the source of nitrogen in the fertilizer. It has been stated on the basis of the laboratory tests that the fertilizer with the assumed composition can be obtained by means of granulation of the raw material pulp, along with the dried and ground product return. The possibility of the production of the fertilizer with good physical properties according to the assumed concept has been confirmed in the pilot scale.

2

Kompleks mocznikowo-wodoronadtlenkowy jako efektywny i ekologiczny czynnik utleniający w syntezie organicznej

Podraza A., Pielichowski J.

Przemysł Chemiczny

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2013

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T. 92, nr 2

158-164

3

Technologia wytwarzania nawozów azotowo-siarkowo-wapniowych na bazie fosfogipsu i mocznika

Borowik M., Malinowski P., Biskupski A., Dawidowicz M., Schab S., Rusek P., Igras J., Kęsik K.

Chemik

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2012

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Vol. 66, nr 5

525-534

PL

Przeprowadzono badania nad możliwością otrzymywania granulowanych nawozów typu adduktu siarczanu wapnia i mocznika na drodze granulacji pulpy mocznikowo-fosfogipsowej. Zbadano wpływ różnych dodatków na wytrzymałość granul tego typu nawozów. Stwierdzono, że dodatek siarczanu magnezu, stosowanego w różnych formach, zwiększa wytrzymałość granulatów. Wzrost wytrzymałości powoduje także dodatek bentonitu. Przydatność rolnicza nawozu została sprawdzona w rolniczych doświadczeniach polowych.

EN

Studies on preparation possibility of granular fertilizers of calcium sulfate and urea adduct type by granulation of urea-phosphogypsum pulp were carried out. The effect of various additives on granule hardness of this type fertilizers was investigated. It was found that addition of magnesium sulfate in various forms increased the granule mechanical strength. Bentonite addition also increased hardness of granules. Agricultural usefulness of the fertilizers was confirmed in field tests.

4

Preparation methods of calcium sulphate and urea adduct

Malinowski P., Biskupski A., Głowiński J.

Polish Journal of Chemical Technology

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2007

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Vol. 9, nr 4

111-114

EN

The paper presents the results of laboratory studies on the preparation of calcium sulphate and urea adduct by: grinding, compacting and mixing in the presence of physical water. A method for the measurement of urea conversion into the adduct form, which is based on the difference in solubility of free urea and the adduct bound urea CaSO4ź4CO(NH2)2 in n-butanol, was developed. Mixing the reagents in the presence of physical water produced the best results. High urea conversion into the adduct form, over 85%, in the prepared samples indicates that this method can be successfully used to get CaSO4ź4CO(NH2)2 adduct.

5

Diacetylene omega-glycols. Etherates - adducts of 1,6-di(p-halogeno)-1,6-diphenylhexa-2,4-diyne-1,6-diols with diethyl ether and dioxane

Jasiobędzki W., Moszczyński-Pętkowski R., Woźniak-Kornacka J.

Bulletin of the Polish Academy of Sciences. Chemistry

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2001

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Vol. 49, No. 3

225-234

EN

Stable, crystalline adducts of the title diols (F, Cl, Br, I) with diethyl ether and dioxane have been obtained. Spectral properties have been described. No formation of etherates from tetraphenyl diols not containing halogen atoms (1) has been found.