GB932215A - Continuous crystallization of calcium nitrate tetrahydrate - Google Patents

Continuous crystallization of calcium nitrate tetrahydrate

Info

Publication number
GB932215A
GB932215A GB11901/60A GB1190160A GB932215A GB 932215 A GB932215 A GB 932215A GB 11901/60 A GB11901/60 A GB 11901/60A GB 1190160 A GB1190160 A GB 1190160A GB 932215 A GB932215 A GB 932215A
Authority
GB
United Kingdom
Prior art keywords
cooling liquid
solutions
vessel
calcium nitrate
cooling
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
GB11901/60A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB932215A publication Critical patent/GB932215A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D9/00—Crystallisation
    • B01D9/0004—Crystallisation cooling by heat exchange
    • B01D9/0009—Crystallisation cooling by heat exchange by direct heat exchange with added cooling fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D9/00—Crystallisation
    • B01D9/0036—Crystallisation on to a bed of product crystals; Seeding
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F11/00—Compounds of calcium, strontium, or barium
    • C01F11/36—Nitrates
    • C01F11/40—Preparation by double decomposition with nitrates
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05B—PHOSPHATIC FERTILISERS
    • 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
    • C05B11/04—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 using mineral acid
    • C05B11/06—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 using mineral acid using nitric acid (nitrophosphates)

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Fertilizers (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

<PICT:0932215/III/1> <PICT:0932215/III/2> A continuous process for the crystallization of calcium nitrate tetrahydrate from the aqueous solutions obtained by decomposing rock phosphates with nitric acid, by cooling said solutions with an inert liquid having lower density than and immiscible with the solutions, said cooling liquid being introduced directly into said solutions to cool same to the crystallization temperature of +10 DEG to -25 DEG C., and heated and/or evaporated by the contact therewith so that the solutions are agitated and circulated by the ascending cooling liquid or by its vapours, is characterized in that the cooling liquid is introduced dropwise at the bottom of a perpendicularly arranged cylindrical body placed concentrically in the vessel in order to maintain the suspension of the growing crystals in a vertical circulation, the crystals when having grown mainly to a size of from 0,4 mm. to 1,00 mm. sedimenting on the bottom of the vessel and being drawn off together with the mother liquor. Suitable cooling liquids include: butane, propane, propane-butane mixtures, fluorinated lower alkanes, petrol free from unsaturated and aromatic fractions, saturated hydrocarbons and non-hydrolysable halogenated hydrocarbons. Fig. 1 illustrates a suitable apparatus for the invention, the liquor being introduced at 1 and the crystal suspension being withdrawn at 6. Cooling liquid is introduced via 3, passes up through inner cylinder 5, evaporating on the way, and the vapours are withdrawn from the top of the vessel and recycled, being condensed in cooler 8. Fig. 2 illustrates a modification in which the cooling liquid does not evaporate, 8 is a separator to separate any calcium nitrate liquor from the used cooling liquid.
GB11901/60A 1959-04-06 1960-04-04 Continuous crystallization of calcium nitrate tetrahydrate Expired GB932215A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS200459 1959-04-06

Publications (1)

Publication Number Publication Date
GB932215A true GB932215A (en) 1963-07-24

Family

ID=5355861

Family Applications (1)

Application Number Title Priority Date Filing Date
GB11901/60A Expired GB932215A (en) 1959-04-06 1960-04-04 Continuous crystallization of calcium nitrate tetrahydrate

Country Status (4)

Country Link
BE (1) BE589380A (en)
DE (1) DE1150397B (en)
GB (1) GB932215A (en)
NL (2) NL127854C (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3497329A (en) * 1966-07-05 1970-02-24 Azote Office Nat Ind Production of phosphoric acid
DE2528611A1 (en) * 1975-06-26 1976-12-30 Bayer Ag METHOD AND DEVICE FOR THE CONTINUOUS PRODUCTION OF CRYSTALS
US4008309A (en) * 1970-01-07 1977-02-15 Institutul De Cercetari Chimice - Icechim Process for crystallizing calcium nitrate
US4079123A (en) * 1976-12-30 1978-03-14 Hooker Chemicals & Plastics Corporation Process for the production of chlorine dioxide
US4840652A (en) * 1986-01-18 1989-06-20 Coldeco S.A. Method of generating and using cold, and device for implementing such method
CN109399688A (en) * 2018-10-17 2019-03-01 贵州芭田生态工程有限公司 The method of phosphate fertilizer mother liquor low temperature decalcification and decalcification filtrate and phosphate fertilizer preparation method
EP4019106A1 (en) 2020-12-23 2022-06-29 Yara International ASA Crystalliser, method for crystallising and use of the crystalliser in performing the method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110732155B (en) * 2019-11-14 2022-03-29 江苏润普食品科技股份有限公司 Particle size controllable calcium propionate continuous evaporation crystallization process and device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE573284C (en) * 1928-10-27 1933-03-29 Erling Johnson Process for the production of calcium nitrate and phosphoric acid or nitrogen and phosphoric acid dueners
BE374459A (en) * 1929-10-23
DE677966C (en) * 1937-06-27 1939-07-06 I G Farbenindustrie Akt Ges Digestion of phosphates
DE697374C (en) * 1938-04-08 1940-10-12 I G Farbenindustrie Akt Ges Process for digesting phosphates
FR1040911A (en) * 1951-07-21 1953-10-20 Saint Gobain Improvement in the manufacture of phospho-nitrogen fertilizers

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3497329A (en) * 1966-07-05 1970-02-24 Azote Office Nat Ind Production of phosphoric acid
US4008309A (en) * 1970-01-07 1977-02-15 Institutul De Cercetari Chimice - Icechim Process for crystallizing calcium nitrate
DE2528611A1 (en) * 1975-06-26 1976-12-30 Bayer Ag METHOD AND DEVICE FOR THE CONTINUOUS PRODUCTION OF CRYSTALS
US4079123A (en) * 1976-12-30 1978-03-14 Hooker Chemicals & Plastics Corporation Process for the production of chlorine dioxide
US4840652A (en) * 1986-01-18 1989-06-20 Coldeco S.A. Method of generating and using cold, and device for implementing such method
CN109399688A (en) * 2018-10-17 2019-03-01 贵州芭田生态工程有限公司 The method of phosphate fertilizer mother liquor low temperature decalcification and decalcification filtrate and phosphate fertilizer preparation method
EP4019106A1 (en) 2020-12-23 2022-06-29 Yara International ASA Crystalliser, method for crystallising and use of the crystalliser in performing the method
WO2022136626A2 (en) 2020-12-23 2022-06-30 Yara International Asa Crystalliser, method for crystallising and use of the crystalliser in performing the method
WO2022136626A3 (en) * 2020-12-23 2022-09-15 Yara International Asa Crystalliser, method for crystallising and use of the crystalliser in performing the method

Also Published As

Publication number Publication date
NL250214A (en)
NL127854C (en)
DE1150397B (en) 1963-06-20
BE589380A (en) 1960-08-01

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