Production of suspension fertilizers from solutions obtained by treating phosphate rock with nitric acid

    公开(公告)号:GB1125664A

    公开(公告)日:1968-08-28

    申请号:GB3417366

    申请日:1966-07-29

    Applicant: BASF AG

    Abstract: 1,125,664. Suspension fertilizers. BADISCHE ANILIN & SODA FABRIK A.G. 29 July, 1966 [31 July, 1965], No. 34173/66. Headings C1A and C1B. Suspension. fertilizer, containing both dissolved-and solid components in the liquid. base, is produced from solutions obtained by treating phosphate. rock with nitric. acid, by neutralization of the solution with gases or liquids containing ammonia, wherein a part of the calcium nitrate formed is deposited. from. solution by cooling, prior to. neutralization,- as calcium nitrate tetrahydrate, and is. separated, in such an amount that a weight ratio of P 2 O 5 : CaO of at least 1À2 : 1 is set up in the. remaining mother liquor; which, together with the neutralizing; agent, is introduced with vigorous stirring, into an already neutralized solution of the same mother liquor while maintaining a. pH value of from 6 to 8 at a temperature of from 10‹ to. 70‹ C. Other nutrient, substances, such as potassium. chloride, potassium sulphate, urea or ammonium nitrate may be. added .to the neutralized -mixture.

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