METHOD FOR PRODUCTION OF COMPLEX FERTILIZERS

FIELD: chemistry, agriculture, fertilizers. ^ SUBSTANCE: invention relates to method for production of complex fertilizers by decomposition of apatite concentrate with nitric acid by using low-grade phosphate raw materials are used. Claimed method includes decomposition of apatite concentrate with n...

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Hauptverfasser:	MALJAVIN ANDREJ STANISLAVOVICH, KAZAK VLADIMIR GRIGOR'EVICH, BRIZITSKAJA NATAL'JA MITROFANOVNA, BRIZITSKAJA OL'GA VJACHESLAVOVNA, BUKKOLINI NATAL'JA VASIL'EVNA, MARKOVA MARINA L'VOVNA
Format:	Patent
Sprache:	eng ; rus
Schlagworte:	CHEMISTRY FERTILISERS MANUFACTURE THEREOF METALLURGY PHOSPHATIC FERTILISERS
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creator	MALJAVIN ANDREJ STANISLAVOVICH KAZAK VLADIMIR GRIGOR'EVICH BRIZITSKAJA NATAL'JA MITROFANOVNA BRIZITSKAJA OL'GA VJACHESLAVOVNA BUKKOLINI NATAL'JA VASIL'EVNA MARKOVA MARINA L'VOVNA
description	FIELD: chemistry, agriculture, fertilizers. ^ SUBSTANCE: invention relates to method for production of complex fertilizers by decomposition of apatite concentrate with nitric acid by using low-grade phosphate raw materials are used. Claimed method includes decomposition of apatite concentrate with nitric acid, calcium nitrate isolation from nitrophosphate extract, crystallization followed by conversion thereof in ammonium nitrate; neutralization of separated nitrate-phosphate solution with ammonia, vaporization, blending of evaporated pulp with low-grade phosphate raw materials, ammonium nitrate and potassium salt; granulation and drying of finished product. According to this invention low-grade phosphate raw materials are preliminary treated with conversion ammonium nitrate solution at S:L = 1:1-3 to produce in slurry ratio of P2O5digestible:P2O5total = 35-45 %. PH of conversion solution is maintained preferably either 0.3-1.5 or 7.5-9, with the proviso, that when pH is 0.5-1.5 ratio of apatite and low-grade phosphate raw materials calculated as P2O5 is (1.5-3):1; and when pH is 7.5-9 abovementioned ratio is (4.2-5):1. ^ EFFECT: product of prolonged action, simplified process without losses of product quality. ^ 2 cl, 1 tbl
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Claimed method includes decomposition of apatite concentrate with nitric acid, calcium nitrate isolation from nitrophosphate extract, crystallization followed by conversion thereof in ammonium nitrate; neutralization of separated nitrate-phosphate solution with ammonia, vaporization, blending of evaporated pulp with low-grade phosphate raw materials, ammonium nitrate and potassium salt; granulation and drying of finished product. According to this invention low-grade phosphate raw materials are preliminary treated with conversion ammonium nitrate solution at S:L = 1:1-3 to produce in slurry ratio of P2O5digestible:P2O5total = 35-45 %. PH of conversion solution is maintained preferably either 0.3-1.5 or 7.5-9, with the proviso, that when pH is 0.5-1.5 ratio of apatite and low-grade phosphate raw materials calculated as P2O5 is (1.5-3):1; and when pH is 7.5-9 abovementioned ratio is (4.2-5):1. ^ EFFECT: product of prolonged action, simplified process without losses of product quality. ^ 2 cl, 1 tbl</description><language>eng ; rus</language><subject>CHEMISTRY ; FERTILISERS ; MANUFACTURE THEREOF ; METALLURGY ; PHOSPHATIC FERTILISERS</subject><creationdate>2006</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20061027&DB=EPODOC&CC=RU&NR=2286320C1$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76290</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20061027&DB=EPODOC&CC=RU&NR=2286320C1$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>MALJAVIN ANDREJ STANISLAVOVICH</creatorcontrib><creatorcontrib>KAZAK VLADIMIR GRIGOR'EVICH</creatorcontrib><creatorcontrib>BRIZITSKAJA NATAL'JA MITROFANOVNA</creatorcontrib><creatorcontrib>BRIZITSKAJA OL'GA VJACHESLAVOVNA</creatorcontrib><creatorcontrib>BUKKOLINI NATAL'JA VASIL'EVNA</creatorcontrib><creatorcontrib>MARKOVA MARINA L'VOVNA</creatorcontrib><title>METHOD FOR PRODUCTION OF COMPLEX FERTILIZERS</title><description>FIELD: chemistry, agriculture, fertilizers. ^ SUBSTANCE: invention relates to method for production of complex fertilizers by decomposition of apatite concentrate with nitric acid by using low-grade phosphate raw materials are used. 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PH of conversion solution is maintained preferably either 0.3-1.5 or 7.5-9, with the proviso, that when pH is 0.5-1.5 ratio of apatite and low-grade phosphate raw materials calculated as P2O5 is (1.5-3):1; and when pH is 7.5-9 abovementioned ratio is (4.2-5):1. ^ EFFECT: product of prolonged action, simplified process without losses of product quality. ^ 2 cl, 1 tbl</abstract><oa>free_for_read</oa></addata></record>
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subjects	CHEMISTRY FERTILISERS MANUFACTURE THEREOF METALLURGY PHOSPHATIC FERTILISERS
title	METHOD FOR PRODUCTION OF COMPLEX FERTILIZERS
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