GB1278247A - Phosphoric acid - Google Patents

Phosphoric acid

Info

Publication number
GB1278247A
GB1278247A GB5419568A GB5419568A GB1278247A GB 1278247 A GB1278247 A GB 1278247A GB 5419568 A GB5419568 A GB 5419568A GB 5419568 A GB5419568 A GB 5419568A GB 1278247 A GB1278247 A GB 1278247A
Authority
GB
United Kingdom
Prior art keywords
phosphoric acid
acid
nov
recovered
calcium sulphate
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
GB5419568A
Inventor
Raymond Frederick Hall
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.)
Fisons Ltd
Original Assignee
Fisons 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 Fisons Ltd filed Critical Fisons Ltd
Priority to GB5419568A priority Critical patent/GB1278247A/en
Priority to NL6916679A priority patent/NL161419B/en
Priority to BE741379D priority patent/BE741379A/xx
Priority to FR6939140A priority patent/FR2023397A1/fr
Publication of GB1278247A publication Critical patent/GB1278247A/en
Expired legal-status Critical Current

Links

Classifications

    • 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

Abstract

1278247 Phosphoric acid FISONS Ltd 4 Nov 1969 [15 Nov 1968] 54195/69 Heading C1A In the "wet process" production of phosphoric acid, occluded acid is recovered from the precipitated calcium sulphate by recrystallizing the separated precipitate from a suitable liquor, usually containing sulphuric and phosphoric acids, to which a reactive siliceous material has been added. The recrystallization is carried out under the appropriate conditions to give calcium sulphate in a different state of hydration to that originally precipitated, e.g. the hemihydrate is converted to purified gypsum which may be recovered as a by-product. Suitable siliceous materials include silicic acid, ground blast furnace slag, talc and particularly kieselguhr.
GB5419568A 1968-11-15 1968-11-15 Phosphoric acid Expired GB1278247A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB5419568A GB1278247A (en) 1968-11-15 1968-11-15 Phosphoric acid
NL6916679A NL161419B (en) 1968-11-15 1969-11-05 PROCESS FOR THE PREPARATION OF PHOSPHORIC ACID.
BE741379D BE741379A (en) 1968-11-15 1969-11-06
FR6939140A FR2023397A1 (en) 1968-11-15 1969-11-14

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5419568A GB1278247A (en) 1968-11-15 1968-11-15 Phosphoric acid

Publications (1)

Publication Number Publication Date
GB1278247A true GB1278247A (en) 1972-06-21

Family

ID=10470229

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5419568A Expired GB1278247A (en) 1968-11-15 1968-11-15 Phosphoric acid

Country Status (4)

Country Link
BE (1) BE741379A (en)
FR (1) FR2023397A1 (en)
GB (1) GB1278247A (en)
NL (1) NL161419B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2636140A1 (en) * 1975-08-13 1977-02-24 Nissan Chemical Ind Ltd WET PROCESS FOR THE PRODUCTION OF HIGHLY CONCENTRATED PHOSPHORIC ACID
US5236679A (en) * 1992-05-06 1993-08-17 Freeport-Mcmoran Resource Partners Removal of aluminum contamination during production of phosphoric acid

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4853201A (en) * 1988-07-11 1989-08-01 Occidental Chemical Corporation Recovery of P2 O5 values from phosphoric acid hemihydrate crystals

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2636140A1 (en) * 1975-08-13 1977-02-24 Nissan Chemical Ind Ltd WET PROCESS FOR THE PRODUCTION OF HIGHLY CONCENTRATED PHOSPHORIC ACID
US4101638A (en) * 1975-08-13 1978-07-18 Nissan Chemical Industries, Ltd. Process for the manufacture of a slurry containing highly concentrated phosphoric acid and calcium sulfate hemihydrate in a readily filterable form
US5236679A (en) * 1992-05-06 1993-08-17 Freeport-Mcmoran Resource Partners Removal of aluminum contamination during production of phosphoric acid

Also Published As

Publication number Publication date
NL6916679A (en) 1970-05-20
NL161419B (en) 1979-09-17
FR2023397A1 (en) 1970-08-21
BE741379A (en) 1970-05-06

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee