Wyniki wyszukiwania - BazTech

1

Studies on the transformation of calcium sulphate dihydrate to hemihydrate in the wet process phosphoric acid production

Grzmil B., Kuc B., Żurek O., Kubiak K.

Polish Journal of Chemical Technology

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2012

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Vol. 14, nr 2

80-87

EN

The influence of the process temperature from 85°C to 95°C, the content of phosphates and sulphates in the wet process phosphoric acid (about 22-36 wt% P2O5 and about 2-9 wt% SO42-) and the addition of ?CaSO4ź0.5H2O crystallization nuclei (from 10% to 50% in relation to CaSO4ź2H2O) on the transformation of calcium sulphate dihydrate to hemihydrate has been determined. The wet process phosphoric acid and phosphogypsum from the industrial plant was utilized. They were produced by reacting sulphuric acid with phosphate rock (Tunisia) in the DH-process. The X-ray diffraction analysis was used to determine the phase composition and fractions of various forms of calcium sulphates in the samples and the degree of conversion of CaSO4ź2H2O to ?CaSO4ź0.5H2O and CaSO4. It was found that the transformation of CaSO4ź2H2O to ?CaSO4ź0.5H2O should be carried out in the presence of ?CaSO4ź0.5H2O crystallization nuclei as an additive (in the amount of 20% in relation to CaSO4ź2H2O), at temperatures 90š2°C, in the wet process phosphoric acid containing the sulphates and phosphates in the range of 4š1 wt% and 27š1 wt%, respectively.

2

Prace poszukiwawcze za granicą Pakistan - blok koncesyjny "Sabzal"

Kuc B.

Wiadomości Naftowe i Gazownicze

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2001

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R. 4, Nr 4 (36)

9-12

3

Obecność Biura Geologicznego "Geonafta" w Pakistanie

Hoffmann M., Kuc B.

Nafta-Gaz

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1998

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R. 54, nr 4

184-190

PL

Pakistan - kraj położony w północno-wschodniej części Półwyspu Indyjskiego dla większości z nas daleki i obcy, teraz stal się dla nas obszarem nowych możliwości i nadziei. W dniu 17 lipca 1997 r. Polskie Górnictwo Naftowe i Gazownictwo S.A. uzyskało pierwszą koncesję na prowadzenie tam prac poszukiwawczych. Aktualnie PGNiG S.A. posiada 3 obszary koncesyjne, o łącznej powierzchni 8060 km z. Utworzony w dniu 7 października Oddział Operatorski w Islamabadzie, podlegający organizacyjnie B.G. "GEONAFI'A", jest oficjalnym przedstawicielstwem PGNiG S.A. w tym kraju i reprezentuje nasze interesy w Pakistanie.

EN

Pakistan, a country in north-eastern part of Indian subcontinent, for most of as distant and strange - now bas become a land of new hopes and possibilities. On 17th July Polish Oil & Gas Company, joint stoch corporation, obtained there the first licence to carry out there oil and gas explorations. Actually P.O.G.C. possesses 3 licence acreages of total area 8060 square kilometers. Established on 7th October in Islamabad Operating Department as part of Geological Office "Geonafta", is the official representative of P.O.G.C. to this country and cares for our matters in Pakistan.