GB816573A - Method of manufacturing fertilisers from calcium nitrate and urea - Google Patents

Method of manufacturing fertilisers from calcium nitrate and urea

Info

Publication number
GB816573A
GB816573A GB18535/55A GB1853555A GB816573A GB 816573 A GB816573 A GB 816573A GB 18535/55 A GB18535/55 A GB 18535/55A GB 1853555 A GB1853555 A GB 1853555A GB 816573 A GB816573 A GB 816573A
Authority
GB
United Kingdom
Prior art keywords
urea
calcium
calcium nitrate
nitrate
phosphate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB18535/55A
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.)
Office National Industriel de lAzote
Original Assignee
Office National Industriel de lAzote
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Office National Industriel de lAzote filed Critical Office National Industriel de lAzote
Publication of GB816573A publication Critical patent/GB816573A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D265/00—Heterocyclic compounds containing six-membered rings having one nitrogen atom and one oxygen atom as the only ring hetero atoms
    • C07D265/28—1,4-Oxazines; Hydrogenated 1,4-oxazines
    • C07D265/30—1,4-Oxazines; Hydrogenated 1,4-oxazines not condensed with other rings
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05C—NITROGENOUS FERTILISERS
    • C05C1/00—Ammonium nitrate fertilisers
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05C—NITROGENOUS FERTILISERS
    • C05C9/00—Fertilisers containing urea or urea compounds

Abstract

Calcium nitrate, separated from nitric acid solutions of natural phosphates by cooling and centrifuging, and still impregnated with nitric and phosphoric acids is treated with urea to neutralize the free acid, thereby forming urea phosphate and nitrate, and to combine with the calcium nitrate in substitution for water of crystallization, to form the compound Ca(NO3)2.4CO(NH2)2. Specifications 246,377, 339,500, [both in Class III], 359,680 and 685,193, [both in Group III], are referred to.ALSO:Calcium nitrate, impregnated with nitric acid and with at least 0,4 per cent. by weight of phosphoric acid, which has been separated from the solution resulting from attacking natural phosphate with nitric acid, is treated with urea to form a neutral fertiliser containing urea nitrate and urea phosphate. If excess urea is employed it combines with the calcium nitrate in substitution for the water of crystallisation in the form of Ca (NO3)2. 4 CO-(NH2)2. Neutralisation of the free acid of the calcium nitrate may be effected in part by alumino-calcium phosphates and the free phosphoric acid content may be deliberately increased and then neutralised, in part, with calcium or ammonium compounds prior to incorporating urea. According to examples (1) crystalline calcium nitrate obtained by cooling and centrifuging a solution obtained by attacking phosphate with nitric acid was melted at 60 DEG C. and an equal weight of urea added. After concentrating at 100 DEG C. a fertiliser containing 33,2 per cent. nitrogen resulted. Calcium carbonate may be added. (IV) Calcium nitrate was treated with urea as in (I) and calcined alumino-calcium phosphate was added, together with potassium sulphate. The resulting paste was granulated with an equal weight of recycled dried dust from preceding operations. Specifications 246,377, 339,500 [both in Class 111], 359,680 and 685,193 [both in Group III] are referred to.
GB18535/55A 1954-06-26 1955-06-27 Method of manufacturing fertilisers from calcium nitrate and urea Expired GB816573A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR816573X 1954-06-26

Publications (1)

Publication Number Publication Date
GB816573A true GB816573A (en) 1959-07-15

Family

ID=9267864

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18535/55A Expired GB816573A (en) 1954-06-26 1955-06-27 Method of manufacturing fertilisers from calcium nitrate and urea

Country Status (1)

Country Link
GB (1) GB816573A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4145208A (en) * 1977-01-12 1979-03-20 Fertilizers & Chemicals Ltd. Method and composition for improving the functioning of drip irrigation systems
US4315763A (en) 1978-10-30 1982-02-16 Stoller Enterprises, Inc. High analysis liquid fertilizers
EP0055493A1 (en) * 1980-12-30 1982-07-07 Lloyd B. Fenn New composition of matter and method of use for nitrogen fertilization
US4500335A (en) * 1980-12-30 1985-02-19 Texas A&M University Composition of matter and method of use for nitrogen fertilization
CN108083877A (en) * 2017-12-20 2018-05-29 贵州芭田生态工程有限公司 A kind of method that calcium nitrate using Phosphate Fertilizer Nitrate with Frozen Method process by-product produces calcium nitrate-urea as raw material

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4145208A (en) * 1977-01-12 1979-03-20 Fertilizers & Chemicals Ltd. Method and composition for improving the functioning of drip irrigation systems
US4315763A (en) 1978-10-30 1982-02-16 Stoller Enterprises, Inc. High analysis liquid fertilizers
EP0055493A1 (en) * 1980-12-30 1982-07-07 Lloyd B. Fenn New composition of matter and method of use for nitrogen fertilization
US4500335A (en) * 1980-12-30 1985-02-19 Texas A&M University Composition of matter and method of use for nitrogen fertilization
CN108083877A (en) * 2017-12-20 2018-05-29 贵州芭田生态工程有限公司 A kind of method that calcium nitrate using Phosphate Fertilizer Nitrate with Frozen Method process by-product produces calcium nitrate-urea as raw material

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