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GB324374A - Process for reclaiming plaster of paris - Google Patents

Process for reclaiming plaster of paris

Info

Publication number
GB324374A
GB324374A GB2163828A GB2163828A GB324374A GB 324374 A GB324374 A GB 324374A GB 2163828 A GB2163828 A GB 2163828A GB 2163828 A GB2163828 A GB 2163828A GB 324374 A GB324374 A GB 324374A
Authority
GB
United Kingdom
Prior art keywords
acid
salts
water
calcination
instance
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
GB2163828A
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.)
MICHEL IVAN AISCHE
Original Assignee
MICHEL IVAN AISCHE
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 MICHEL IVAN AISCHE filed Critical MICHEL IVAN AISCHE
Priority to GB2163828A priority Critical patent/GB324374A/en
Publication of GB324374A publication Critical patent/GB324374A/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
    • C04B11/02—Methods and apparatus for dehydrating gypsum
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

324,374. Aische, M. I. July 26, 1928. Calcium sulphate. - Used plaster of Paris is washed with running water to remove soluble impurities, and then calcined at 90-500‹ C. to render it fit for re-use. Acids or salts, for instance sulphurous or sulphuric acid, selenious or selenic acid, or phosphoric acid, or their acid or neutral salts, may be added to the water used to assist removal of, or to precipitate in a desired form, insoluble impurities present. The washing step may be followed by maceration in water with or without addition of gypsum, calcium hydrate an alkali silicate, a phosphate, &c., and prior to calcination, strengthening, dehydrating or hydrating agents, or deliquescent salts, for instance, an alkaline earth silicate or aluminate, aluminium chloride or double chloride, or an alum may be added. According to the provisional Specification, when the used material is free from impurities, it may be regenerated by calcination only.
GB2163828A 1928-07-26 1928-07-26 Process for reclaiming plaster of paris Expired GB324374A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2163828A GB324374A (en) 1928-07-26 1928-07-26 Process for reclaiming plaster of paris

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2163828A GB324374A (en) 1928-07-26 1928-07-26 Process for reclaiming plaster of paris

Publications (1)

Publication Number Publication Date
GB324374A true GB324374A (en) 1930-01-27

Family

ID=10166299

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2163828A Expired GB324374A (en) 1928-07-26 1928-07-26 Process for reclaiming plaster of paris

Country Status (1)

Country Link
GB (1) GB324374A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19708907C1 (en) * 1997-03-05 1998-04-16 Gfr Aufbereitung Reststoffe Processing organic material-contaminated gypsum waste

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19708907C1 (en) * 1997-03-05 1998-04-16 Gfr Aufbereitung Reststoffe Processing organic material-contaminated gypsum waste
EP0864536A1 (en) * 1997-03-05 1998-09-16 GFR Gesellschaft für die Aufbereitung und Verwertung von Reststoffen mbH Process for the exploitation of gypsum contaminated with organic impurities and its use

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