GB1209911A - Manufacture of phosphoric acid - Google Patents

Manufacture of phosphoric acid

Info

Publication number
GB1209911A
GB1209911A GB482867A GB482867A GB1209911A GB 1209911 A GB1209911 A GB 1209911A GB 482867 A GB482867 A GB 482867A GB 482867 A GB482867 A GB 482867A GB 1209911 A GB1209911 A GB 1209911A
Authority
GB
United Kingdom
Prior art keywords
sulphuric acid
gypsum
phosphoric acid
vessel
caso
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
GB482867A
Inventor
Thomas Alan Williams
Alexander Thompson
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.)
Marchon Products Ltd
Original Assignee
Marchon Products Ltd
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 Marchon Products Ltd filed Critical Marchon Products Ltd
Priority to GB482867A priority Critical patent/GB1209911A/en
Priority to IL2938068A priority patent/IL29380A/en
Priority to DE19681667635 priority patent/DE1667635B1/en
Priority to NL6801375A priority patent/NL6801375A/xx
Priority to BE710189D priority patent/BE710189A/xx
Priority to FR1556482D priority patent/FR1556482A/fr
Publication of GB1209911A publication Critical patent/GB1209911A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B11/00—Calcium sulfate cements
    • C04B11/26—Calcium sulfate cements strating from chemical gypsum; starting from phosphogypsum or from waste, e.g. purification products of smoke
    • 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
    • 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
    • C01F11/46—Sulfates
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00—Hydraulic cements
    • C04B7/02—Portland cement
    • C04B7/04—Portland cement using raw materials containing gypsum, i.e. processes of the Mueller-Kuehne type

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

1,209,911. Phosphoric acid; calcium sulphate hemihydrate. MARCHON PRODUCTS Ltd. 1 Feb., 1968 [1 Feb., 1967], No. 4828/67. Heading C1A. Phosphate rock is treated with sulphuric acid under conditions of temperature and ionic concentration such that gypsum is precipitated (e.g. 60-70‹ C.), the resulting slurry of gypsum in phosphoric acid being transferred to a second vessel where gypsum is recrystallized to calcium sulphate hemihydrate, the requisite rise in temperature for the recrystallization being obtained by addition of at least 93% by weight sulphuric acid. The hemihydrate produced is filtered off and may be used in producing sulphuric acid and Portland cement by the Muller-Kuhne process. Excess sulphuric acid which contaminates the phosphoric acid after removal of the CaSO 4 .¢H 2 O may be removed by addition of phosphate rock. The gypsum thereby precipitated is filtered off and recycled to the initial reaction vessel or to the recrystallization vessel. The CaSO 4 .¢H 2 O may be converted to Portland cement by mixing with coke and shale, and heating to emit SO 2 (beginning at 450‹ C.) and further heating to give cement clinker (to about 1500‹ C.). SO 2 is flushed out by a current of air, and used to make sulphuric acid.
GB482867A 1967-02-01 1967-02-01 Manufacture of phosphoric acid Expired GB1209911A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
GB482867A GB1209911A (en) 1967-02-01 1967-02-01 Manufacture of phosphoric acid
IL2938068A IL29380A (en) 1967-02-01 1968-01-28 Manufacture of phosphoric acid
DE19681667635 DE1667635B1 (en) 1967-02-01 1968-01-30 PROCESS FOR THE PREPARATION OF PHOSPHORIC ACID AND CALCIUM SULPHATE HEMIHYDRATE
NL6801375A NL6801375A (en) 1967-02-01 1968-01-30
BE710189D BE710189A (en) 1967-02-01 1968-01-31
FR1556482D FR1556482A (en) 1967-02-01 1968-01-31

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB482867A GB1209911A (en) 1967-02-01 1967-02-01 Manufacture of phosphoric acid

Publications (1)

Publication Number Publication Date
GB1209911A true GB1209911A (en) 1970-10-21

Family

ID=9784561

Family Applications (1)

Application Number Title Priority Date Filing Date
GB482867A Expired GB1209911A (en) 1967-02-01 1967-02-01 Manufacture of phosphoric acid

Country Status (6)

Country Link
BE (1) BE710189A (en)
DE (1) DE1667635B1 (en)
FR (1) FR1556482A (en)
GB (1) GB1209911A (en)
IL (1) IL29380A (en)
NL (1) NL6801375A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4071603A (en) * 1975-08-01 1978-01-31 Albright & Wilson Limited Process for preparing phosphoric acid

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020100238A1 (en) * 2020-01-08 2021-07-08 Thyssenkrupp Ag Integrated process for the commercial and industrial utilization of calcium sulfate from phosphoric acid production
DE102020100254A1 (en) * 2020-01-08 2021-07-08 Thyssenkrupp Ag Integrated process for the production of a building material from phosphogypsum

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL29556C (en) * 1930-02-13
DE1027647B (en) * 1955-02-16 1958-04-10 Nordengren & Co Ab Process for the production of phosphoric acid
FR1409248A (en) * 1963-07-04 1965-08-27 Prayon Process for the purification of residual gypsum from the manufacture of phosphoric acid by sulfuric attack of natural phosphates

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4071603A (en) * 1975-08-01 1978-01-31 Albright & Wilson Limited Process for preparing phosphoric acid

Also Published As

Publication number Publication date
NL6801375A (en) 1968-08-02
DE1667635B1 (en) 1971-12-16
BE710189A (en) 1968-05-30
FR1556482A (en) 1969-02-07
IL29380A (en) 1972-02-29

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Legal Events

Date Code Title Description
414F Notice of opposition given (sect. 14/1949)
414A Case decided by the comptroller ** specification amended (sect. 14/1949)
49R Reference inserted (sect. 9/1949)
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees