NL169576B - PROCESS FOR REDUCING THE FORMATION OF COAT DURING THE WASHING OF CALCIUM SULPHATE-SEMI-HYDRATE CRYSTALS. - Google Patents

PROCESS FOR REDUCING THE FORMATION OF COAT DURING THE WASHING OF CALCIUM SULPHATE-SEMI-HYDRATE CRYSTALS.

Info

Publication number
NL169576B
NL169576B NL7115613A NL7115613A NL169576B NL 169576 B NL169576 B NL 169576B NL 7115613 A NL7115613 A NL 7115613A NL 7115613 A NL7115613 A NL 7115613A NL 169576 B NL169576 B NL 169576B
Authority
NL
Netherlands
Prior art keywords
washing
semi
formation
reducing
calcium sulphate
Prior art date
Application number
NL7115613A
Other languages
Dutch (nl)
Other versions
NL7115613A (en
NL169576C (en
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 NL7115613A publication Critical patent/NL7115613A/xx
Publication of NL169576B publication Critical patent/NL169576B/en
Application granted granted Critical
Publication of NL169576C publication Critical patent/NL169576C/en

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
    • C01B25/222—Preparation by reacting phosphate-containing material with an acid, e.g. wet process with sulfuric acid, a mixture of acids mainly consisting of sulfuric acid or a mixture of compounds forming it in situ, e.g. a mixture of sulfur dioxide, water and oxygen
    • C01B25/223—Preparation by reacting phosphate-containing material with an acid, e.g. wet process with sulfuric acid, a mixture of acids mainly consisting of sulfuric acid or a mixture of compounds forming it in situ, e.g. a mixture of sulfur dioxide, water and oxygen only one form of calcium sulfate being formed
    • C01B25/226—Hemihydrate process

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Detergent Compositions (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
NL7115613A 1970-11-12 1971-11-12 PROCESS FOR REDUCING THE FORMATION OF COAT DURING THE WASHING OF CALCIUM SULPHATE-SEMI-HYDRATE CRYSTALS. NL169576C (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB5386970A GB1356586A (en) 1970-11-12 1970-11-12 Inhibition of calcium sulphate scale formation
GB222571 1971-01-16
GB469071 1971-02-15
GB4456071 1971-09-24

Publications (3)

Publication Number Publication Date
NL7115613A NL7115613A (en) 1972-05-16
NL169576B true NL169576B (en) 1982-03-01
NL169576C NL169576C (en) 1982-08-02

Family

ID=27447220

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7115613A NL169576C (en) 1970-11-12 1971-11-12 PROCESS FOR REDUCING THE FORMATION OF COAT DURING THE WASHING OF CALCIUM SULPHATE-SEMI-HYDRATE CRYSTALS.

Country Status (6)

Country Link
JP (1) JPS5510543B1 (en)
DE (1) DE2155617B2 (en)
FR (1) FR2114584A5 (en)
GB (1) GB1356586A (en)
NL (1) NL169576C (en)
SE (1) SE371424B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4049774A (en) 1970-11-12 1977-09-20 Fisons Limited Process for reducing formation of gypsum scale durng the washing of calcium sulphate hemihydrate crystals
US4221769A (en) * 1972-11-08 1980-09-09 Fisons Limited Process for preventing the formation of calcium sulphate scale
FR2372118A1 (en) * 1976-11-30 1978-06-23 Prod Chimique Montagne Noire NEW METHODS OF MANUFACTURING PHOSPHORIC ACIDS BY WET METHODS

Also Published As

Publication number Publication date
NL7115613A (en) 1972-05-16
NL169576C (en) 1982-08-02
DE2155617B2 (en) 1980-01-24
DE2155617A1 (en) 1972-05-25
FR2114584A5 (en) 1972-06-30
SE371424B (en) 1974-11-18
JPS5510543B1 (en) 1980-03-17
GB1356586A (en) 1974-06-12

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Legal Events

Date Code Title Description
V1 Lapsed because of non-payment of the annual fee