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Application filed by Открытое акционерное общество "Азот"filedCriticalОткрытое акционерное общество "Азот"
Priority to RU2003108716/15ApriorityCriticalpatent/RU2224717C1/en
Application grantedgrantedCritical
Publication of RU2224717C1publicationCriticalpatent/RU2224717C1/en
FIELD: mineral fertilizers. SUBSTANCE: crystalline potassium nitrate is dissolved in 56- 58% nitric acid to 2-16% potassium nitrate concentration and resulting solution is neutralized with gaseous ammonia to give mixed intermediate product containing ammonium and potassium nitrates. The latter is evaporated to melt and granulated by known technique. EFFECT: reduced power consumption in evaporation stage due to reduced amount of water introduced into process. 2 cl, 1 dwg, 2 ex
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Текст описания в факсимильном виде (см. графическую часть)л Description text in facsimile form (see graphic part) l
Claims (2)
1. Способ получения комплексного N:K удобрения, включающий нейтрализацию азотной кислоты газообразным аммиаком в присутствии калий-содержащей добавки, упаривание смешанного раствора и гранулирование плава, отличающийся тем, что калий вводят до стадии нейтрализации путем растворения кристаллического нитрата калия в 56-58% азотной кислоте.1. The method of obtaining complex N: K fertilizers, including the neutralization of nitric acid with gaseous ammonia in the presence of potassium-containing additives, evaporation of the mixed solution and granulation of the melt, characterized in that the potassium is introduced to the stage of neutralization by dissolving crystalline potassium nitrate in 56-58% nitric acid.2. Способ по п.1, отличающийся тем, что концентрацию нитрата калия в азотной кислоте поддерживают в пределах 2-16 мас.%.2. The method according to claim 1, characterized in that the concentration of potassium nitrate in nitric acid is maintained in the range of 2-16 wt.%.
