ES369090A2 - A continuous procedure for the production of phosphoric acid. (Machine-translation by Google Translate, not legally binding) - Google Patents

A continuous procedure for the production of phosphoric acid. (Machine-translation by Google Translate, not legally binding)

Info

Publication number
ES369090A2
ES369090A2 ES369090A ES369090A ES369090A2 ES 369090 A2 ES369090 A2 ES 369090A2 ES 369090 A ES369090 A ES 369090A ES 369090 A ES369090 A ES 369090A ES 369090 A2 ES369090 A2 ES 369090A2
Authority
ES
Spain
Prior art keywords
production
phosphoric acid
translation
machine
legally binding
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
ES369090A
Other languages
Spanish (es)
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
Publication of ES369090A2 publication Critical patent/ES369090A2/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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

A prior process described in Specification 1,135,951 for the production of phosphoric acid and calcium sulphate semihydrate in three stages is modified by the addition of a fourth stage in which the washed CaSO 4 .H 2 O is recrystallized to form gypsum in an aqueous solution at a temperature of 30-70 C., the solution containing 2À5-10% by weight of H 2 SO 4 and having an H 2 SO 4 : P 2 O 5 ratio in the range 0À6- 3À4 : 1 and subsequently separating gypsum crystals from the aqueous solution by filtration, part of the filtrate resulting from the filtration of the gypsum crystals being used as at least part of the third-stage wash for the CaSO 4 .H 2 O.
ES369090A 1968-07-04 1969-07-03 A continuous procedure for the production of phosphoric acid. (Machine-translation by Google Translate, not legally binding) Expired ES369090A2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3198268 1968-07-04

Publications (1)

Publication Number Publication Date
ES369090A2 true ES369090A2 (en) 1976-11-16

Family

ID=10331279

Family Applications (1)

Application Number Title Priority Date Filing Date
ES369090A Expired ES369090A2 (en) 1968-07-04 1969-07-03 A continuous procedure for the production of phosphoric acid. (Machine-translation by Google Translate, not legally binding)

Country Status (9)

Country Link
JP (1) JPS5417597B1 (en)
AT (1) AT301486B (en)
BE (1) BE735078A (en)
BR (1) BR6910443D0 (en)
DE (1) DE1933692B2 (en)
ES (1) ES369090A2 (en)
FR (1) FR2012292A6 (en)
GB (1) GB1250191A (en)
NL (1) NL6910092A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4029743A (en) * 1975-12-24 1977-06-14 Hauge Douglas O Phosphoric acid manufacture
US4309395A (en) * 1980-04-21 1982-01-05 Hauge Douglas O Phosphoric acid production
US4424196A (en) * 1982-06-29 1984-01-03 United States Gypsum Company Phosphohemihydrate process for purification of gypsum
US4853201A (en) * 1988-07-11 1989-08-01 Occidental Chemical Corporation Recovery of P2 O5 values from phosphoric acid hemihydrate crystals
DE19817245A1 (en) * 1998-04-18 1999-10-28 Loh Kg Rittal Werk switch cabinet
DE102016212242B4 (en) 2016-07-05 2019-02-07 Technische Universität Bergakademie Freiberg Process for the production of phosphoric acid from phosphorus-containing primary and secondary raw materials

Also Published As

Publication number Publication date
NL6910092A (en) 1970-01-06
JPS5417597B1 (en) 1979-06-30
DE1933692A1 (en) 1970-01-15
GB1250191A (en) 1971-10-20
AT301486B (en) 1972-09-11
BR6910443D0 (en) 1973-05-31
BE735078A (en) 1969-12-24
FR2012292A6 (en) 1970-03-20
DE1933692B2 (en) 1977-06-16

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Legal Events

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FD2A Announcement of lapse in spain

Effective date: 20170630