RO90804A - Procedeu de reducere a continutului de crom hexavalent solubil in apadin ciment - Google Patents

Procedeu de reducere a continutului de crom hexavalent solubil in apadin ciment

Info

Publication number
RO90804A
RO90804A RO84115758A RO11575884A RO90804A RO 90804 A RO90804 A RO 90804A RO 84115758 A RO84115758 A RO 84115758A RO 11575884 A RO11575884 A RO 11575884A RO 90804 A RO90804 A RO 90804A
Authority
RO
Romania
Prior art keywords
hexavalent chromium
chromium content
cement water
reducing hexavalent
content soluble
Prior art date
Application number
RO84115758A
Other languages
English (en)
French (fr)
Other versions
RO90804B (ro
Inventor
Per Norelius
Original Assignee
Cementa Ab,Se
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 Cementa Ab,Se filed Critical Cementa Ab,Se
Publication of RO90804A publication Critical patent/RO90804A/ro
Publication of RO90804B publication Critical patent/RO90804B/ro

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
    • C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators or shrinkage compensating agents
    • C04B22/0006—Waste inorganic materials
    • 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
    • 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
    • C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators or shrinkage compensating agents
    • C04B22/08—Acids or salts thereof
    • C04B22/14—Acids or salts thereof containing sulfur in the anion, e.g. sulfides
    • C04B22/142—Sulfates
    • C04B22/149—Iron-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
    • C04B7/22—Iron ore cements ; Iron rich cements, e.g. Ferrari cements, Kühl cements
    • 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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/10—Compositions or ingredients thereof characterised by the absence or the very low content of a specific material
    • C04B2111/1075—Chromium-free or very low chromium-content materials
    • C04B2111/1081—Chromium VI, e.g. for avoiding chromium eczema

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
RO115758A 1983-01-20 1984-09-20 PROCEDEU DE REDUCERE A CONTINUTULUI DE CROM HEXAVALENT SOLUBIL îN APA, DIN CIMENT RO90804B (ro)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8300283 1983-01-20

Publications (2)

Publication Number Publication Date
RO90804A true RO90804A (ro) 1987-01-30
RO90804B RO90804B (ro) 1987-01-31

Family

ID=20349686

Family Applications (1)

Application Number Title Priority Date Filing Date
RO115758A RO90804B (ro) 1983-01-20 1984-09-20 PROCEDEU DE REDUCERE A CONTINUTULUI DE CROM HEXAVALENT SOLUBIL îN APA, DIN CIMENT

Country Status (10)

Country Link
EP (1) EP0133434A1 (ro)
KR (1) KR840007392A (ro)
AU (1) AU2434284A (ro)
DD (1) DD217503A5 (ro)
GR (1) GR79711B (ro)
IT (1) IT1173095B (ro)
PL (1) PL245835A1 (ro)
RO (1) RO90804B (ro)
WO (1) WO1984002900A1 (ro)
YU (1) YU9684A (ro)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4321077A1 (de) 1993-06-24 1995-01-05 Dyckerhoff Ag Verfahren zur Depression der Allergien verursachenden Wirkung von wasserlöslichem Cr·V··I· in Zementen und/oder zementhaltigen Zubereitungen
SK282086B6 (sk) 1999-10-12 2001-10-08 Pova�Sk� Cement�Re�, A. S. Spôsob výroby cementu so zníženým obsahom chrómu
ATE294148T1 (de) * 2003-01-25 2005-05-15 Alexander Kehrmann Chromatreduziertes hydraulisches bindemittel
DE10332530A1 (de) † 2003-07-17 2005-02-10 Kerr-Mcgee Pigments Gmbh Verfahren zur Reduktion des löslichen Chromatgehaltes in Zement sowie eine Zubereitung aus Zement und wasserlöslichen Metallsulfaten
AU2004297504B9 (en) * 2003-11-21 2010-06-03 W.R. Grace & Co.-Conn. Sulfate dispersion chromate reducer
ATE329887T1 (de) * 2003-12-12 2006-07-15 Kehrmann Alexander Hydraulisches bindemittel
JP2007520416A (ja) * 2004-02-04 2007-07-26 ダブリュー・アール・グレイス・アンド・カンパニー−コネチカット 相互粉砕セメントに対する液体添加物
CZ300050B6 (cs) * 2005-09-30 2009-01-21 Peringer@František Zpusob úpravy manipulacních vlastností heptahydratovaného síranu železnatého, zejména snížení jeho hygroskopických vlastností
ES2316283B1 (es) * 2007-05-31 2010-02-05 Fertisac, S.L. Procedimiento de fabricacion de sulfato ferroso granulado como aditivo para cementeras.
US8076175B2 (en) 2008-02-25 2011-12-13 Suniva, Inc. Method for making solar cell having crystalline silicon P-N homojunction and amorphous silicon heterojunctions for surface passivation
US7717999B1 (en) 2008-12-24 2010-05-18 The National Titanium Dioxide, Co., Ltd. (Cristal) Titanium production waste byproduct as partial cement replacement
CN111099849A (zh) * 2019-12-26 2020-05-05 安徽迪诺环保新材料科技有限公司 一种钛石膏建筑水泥砂浆及其制备方法
CN111807749B (zh) * 2020-06-11 2022-04-12 内蒙古同佳技术发展有限公司 一种六价铬还原剂及其制备方法
CN113060948A (zh) * 2021-04-01 2021-07-02 重庆康尼睿能商贸有限公司 一种水泥生料及水泥的制备方法
CN113072318B (zh) * 2021-04-25 2023-04-07 湖北新洋丰新型建材科技有限公司 一种球状磷石膏及其制备方法和应用

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2307270A (en) * 1940-08-04 1943-01-05 Mellon Inst Of Ind Res Building material
US3425892A (en) * 1965-10-22 1969-02-04 Grace W R & Co Cement set retarder
IS1443B6 (is) * 1980-12-17 1990-12-14 Aalborg Portland A/S thurr sementsblanda
JPS59501825A (ja) * 1982-11-17 1984-11-01 アクテイ−ゼルスカベツト　アアルボルグ　ポ−トランド−セメント−フアブリク 紛末特性の改良方法

Also Published As

Publication number Publication date
YU9684A (en) 1986-08-31
RO90804B (ro) 1987-01-31
DD217503A5 (de) 1985-01-16
IT8419258A0 (it) 1984-01-20
GR79711B (ro) 1984-10-31
EP0133434A1 (en) 1985-02-27
WO1984002900A1 (en) 1984-08-02
IT1173095B (it) 1987-06-18
PL245835A1 (en) 1985-01-30
KR840007392A (ko) 1984-12-07
AU2434284A (en) 1984-08-15

Similar Documents

Publication Publication Date Title
RO90804A (ro) Procedeu de reducere a continutului de crom hexavalent solubil in apadin ciment
EP0101723A4 (en) Process for improving hydraulic cement mixes.
JPS55159897A (en) Facility for purifying waste water
BE863227A (fr) Procede de purification d'eaux fluorees, notamment d'eaux residuaires fluorees
FR2570367B1 (fr) Procede pour la production d'hemihydrate de gypse sous forme a
FR2542495B1 (fr) Procede pour l'incorporation de boues dans du cimentÿa
JPS5413664A (en) Method of biologically purifying waste water
GB2033769B (en) Method of purifying waste water
JPS5488304A (en) Means and method for hardening water in case of waste paper selection
JPS54117155A (en) Biological purifying method of waste water
JPS5340681A (en) Method of treating waste water of raw concrete
BE860849A (fr) Procede d'epuration biologique d'eaux residuaires et installation pour la mise en oeuvre de ce procede
FI103107B1 (fi) Menetelmä jäteveden puhdistamiseksi
BE879492A (fr) Solution pour l'electrodeposition de chrome trivalent a faible concentration et procede d'electrodeposition utilisant une telle solution
DE3167663D1 (en) Method for treating portland cement concrete
BR8200179A (pt) Metodo de neutralizar residuos alcalinos em cimento hidraulico
JPS52113559A (en) Method of treating chromium *vi* in waste water
GB2117798B (en) Improvements in or relating to a method of treating liquids by oligodynamy particularly of sullage waters and to a system practising said method
MA20218A1 (fr) Procede de purification d'uranium hexavalent.
FR2552324B1 (fr) Eau anticancereuse, procede pour sa realisation, outillage pour sa conservation, et methode pour le traitement du cancer
IT1127238B (it) Metodo per la riduzione del cromo esavalente nelle acque di scarico
PL234221A1 (en) Method of reduction of hexavalent chromium contained in wastes obtained during production of chromium compounds
JPS52115557A (en) Method of purifying waste water
JPS52120553A (en) Method of purifying waste water
RO75774A2 (ro) Procedeu de epurare a apelor reziduale continind cianuri si cianati