GB1290471A - - Google Patents

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Publication number
GB1290471A
GB1290471A GB1290471DA GB1290471A GB 1290471 A GB1290471 A GB 1290471A GB 1290471D A GB1290471D A GB 1290471DA GB 1290471 A GB1290471 A GB 1290471A
Authority
GB
United Kingdom
Prior art keywords
rdc
2kcl
sif
reaction
ascending current
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
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 filed Critical
Publication of GB1290471A publication Critical patent/GB1290471A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
    • C01D7/00—Carbonates of sodium, potassium or alkali metals in general
    • C01D7/07—Preparation from the hydroxides
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D9/00—Crystallisation
    • B01D9/005—Selection of auxiliary, e.g. for control of crystallisation nuclei, of crystal growth, of adherence to walls; Arrangements for introduction thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D9/00—Crystallisation
    • B01D9/0059—General arrangements of crystallisation plant, e.g. flow sheets
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B25/00—Phosphorus; Compounds thereof
    • C01B25/16—Oxyacids of phosphorus; Salts thereof
    • C01B25/18—Phosphoric acid
    • C01B25/22—Preparation by reacting phosphate-containing material with an acid, e.g. wet process
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B25/00—Phosphorus; Compounds thereof
    • C01B25/16—Oxyacids of phosphorus; Salts thereof
    • C01B25/26—Phosphates
    • C01B25/28—Ammonium phosphates
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B25/00—Phosphorus; Compounds thereof
    • C01B25/16—Oxyacids of phosphorus; Salts thereof
    • C01B25/26—Phosphates
    • C01B25/38—Condensed phosphates
    • C01B25/40—Polyphosphates
    • C01B25/405—Polyphosphates of ammonium
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00—Silicon; Compounds thereof
    • C01B33/08—Compounds containing halogen
    • C01B33/10—Compounds containing silicon, fluorine, and other elements
    • C01B33/103—Fluosilicic acid; Salts thereof
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
    • C01C1/00—Ammonia; Compounds thereof
    • C01C1/16—Halides of ammonium
    • C01C1/162—Ammonium fluoride
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
    • C01C1/00—Ammonia; Compounds thereof
    • C01C1/24—Sulfates of ammonium
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
    • C01C1/00—Ammonia; Compounds thereof
    • C01C1/24—Sulfates of ammonium
    • C01C1/244—Preparation by double decomposition of ammonium salts with sulfates
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
    • C01D5/00—Sulfates or sulfites of sodium, potassium or alkali metals in general

Abstract

1290471 Reflux crystallisation VERENIGDE KUNSTMESTFABRIEKEN MEKOG ALBATROS NV 8 Jan 1970 [10 Jan 1969] 1009/70 Heading B1G [Also in Division Cl] The mixing of ion-containing liquids to produce a crystalline precipitate is effected in a Rotating Disc Contactor (RDC) in which an ascending current is maintained. An RDC is a vertical cylindrical column divided into spaces internally by baffle rings having a central opening, and in which a stirring device is present in the form of a rotatable shaft extending through the openings, and carrying horizontally mounted discs. The largest crystals descend and are recovered, optionally after washing in a second RDC of smaller diameter than, and mounted below the first, and in which a slower ascending current is maintained. A space above the first RDC may be provided in which the ascending current is made slower than in the RDC, e.g. by removing liquid from the bottom of the space. Discharged mother liquor which may still contain fine crystals may be recycled and used for dissolving initial materials. The following crystallizations are exemplified:- (1) mixing of crude phosphate containing 50% CaO + 35% P 2 O 5 , dissolved in HNO 3 , with H 2 SO 4 giving double decomposition into calcium sulphate hemihydrate; (2) the reaction H 2 SiF 6 + 2NaCl (or 2KCl) -> Na 2 SiF 6 (or K 2 SiF 6 ) + 2HCl; (3) the successive reactions (a) 2MgSO 4 + 2KCl + 6H 2 O -> MgCl 2 + K 2 SO 4 .MgSO 4 .6H 2 O, (b) K 2 SO 4 . MgSO 4 .6H 2 O + 2KCl -> MgCl 2 + 2K 2 SO 4 + 6H 2 O. In (3) above, each reaction is conducted in an RDC, precipitation being effected in reaction (b) by addition of, e.g. methanol, ethanol, dioxane or acetone.
GB1290471D 1969-01-10 1970-01-08 Expired GB1290471A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6900394.A NL161065C (en) 1969-01-10 1969-01-10 METHOD AND APPARATUS FOR PREPARING CHEMICALS IN A SO-CALLED "ROTATING DISC CONTACTOR".

Publications (1)

Publication Number Publication Date
GB1290471A true GB1290471A (en) 1972-09-27

Family

ID=19805826

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1290471D Expired GB1290471A (en) 1969-01-10 1970-01-08

Country Status (10)

Country Link
JP (1) JPS4937342B1 (en)
AT (1) AT311924B (en)
BE (1) BE744176A (en)
CA (1) CA930135A (en)
DE (1) DE2000709C2 (en)
ES (1) ES375258A1 (en)
FR (1) FR2028097A1 (en)
GB (1) GB1290471A (en)
IL (1) IL33681A (en)
NL (1) NL161065C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113120923A (en) * 2019-12-31 2021-07-16 中国科学院过程工程研究所 Method for separating and recovering iron, sodium and ammonium from mixed solution and application

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2601674A (en) * 1948-06-18 1952-06-24 Shell Dev Liquid contact apparatus with rotating disks
US3015545A (en) * 1959-03-26 1962-01-02 Texaco Development Corp Apparatus for effecting fluid-fluid contact

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113120923A (en) * 2019-12-31 2021-07-16 中国科学院过程工程研究所 Method for separating and recovering iron, sodium and ammonium from mixed solution and application
CN113120923B (en) * 2019-12-31 2022-11-29 中国科学院过程工程研究所 Method for separating and recovering iron, sodium and ammonium from mixed solution and application

Also Published As

Publication number Publication date
ES375258A1 (en) 1972-08-16
BE744176A (en) 1970-07-08
IL33681A (en) 1973-05-31
DE2000709A1 (en) 1970-07-23
JPS4937342B1 (en) 1974-10-08
DE2000709C2 (en) 1982-04-22
NL161065B (en) 1979-08-15
FR2028097A1 (en) 1970-10-09
CA930135A (en) 1973-07-17
IL33681A0 (en) 1970-03-22
NL6900394A (en) 1970-07-14
AT311924B (en) 1973-12-10
NL161065C (en) 1980-01-15

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee