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Expired
Application number
GB20830/32A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Norsk Hydro Elektrisk Kvaelstof AS
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Norsk Hydro Elektrisk Kvaelstof AS
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Application filed by Norsk Hydro Elektrisk Kvaelstof ASfiledCriticalNorsk Hydro Elektrisk Kvaelstof AS
Publication of GB391345ApublicationCriticalpatent/GB391345A/en
C05B11/00—Fertilisers produced by wet-treating or leaching raw materials either with acids in such amounts and concentrations as to yield solutions followed by neutralisation, or with alkaline lyes
C05B11/02—Pretreatment
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Chemical & Material Sciences
(AREA)
Organic Chemistry
(AREA)
Compositions Of Macromolecular Compounds
(AREA)
Abstract
Crude phosphates which are to be decomposed by acid are first freed from halogens by admixture with a " phosphoric acid reactive agent " followed by calcination, say in a rotary furnace at 1000 DEG C. The phosphate may be finely pulverized and admixed with phosphoric acid, superphosphate, or double superphosphate, or with a salt solution containing phosphoric acid obtained, as from washing operations, following the decomposition of the pretreated phosphate with acid.
GB20830/32A1931-08-291932-07-23Improvements in or relating to the treatment of crude phosphates
ExpiredGB391345A
(en)