ZA200600429B - Reducing agent for the soluble chromate content of cement and methods for the production thereof - Google Patents
Reducing agent for the soluble chromate content of cement and methods for the production thereof Download PDFInfo
- Publication number
- ZA200600429B ZA200600429B ZA200600429A ZA200600429A ZA200600429B ZA 200600429 B ZA200600429 B ZA 200600429B ZA 200600429 A ZA200600429 A ZA 200600429A ZA 200600429 A ZA200600429 A ZA 200600429A ZA 200600429 B ZA200600429 B ZA 200600429B
- Authority
- ZA
- South Africa
- Prior art keywords
- iron
- sulphate
- reducing agent
- sulphuric acid
- cement
- Prior art date
Links
- 239000003638 chemical reducing agent Substances 0.000 title claims description 75
- 238000000034 method Methods 0.000 title claims description 18
- 239000004568 cement Substances 0.000 title description 58
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 title description 16
- 238000004519 manufacturing process Methods 0.000 title description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 89
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 80
- 235000011149 sulphuric acid Nutrition 0.000 claims description 79
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 78
- 239000001117 sulphuric acid Substances 0.000 claims description 75
- 239000002244 precipitate Substances 0.000 claims description 58
- 150000003839 salts Chemical class 0.000 claims description 58
- 229910052742 iron Inorganic materials 0.000 claims description 43
- 238000000926 separation method Methods 0.000 claims description 18
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 5
- 239000010936 titanium Substances 0.000 claims description 5
- 229910052719 titanium Inorganic materials 0.000 claims description 5
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims 1
- 229910052748 manganese Inorganic materials 0.000 claims 1
- 239000011572 manganese Substances 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 50
- 239000002253 acid Substances 0.000 description 46
- 238000005406 washing Methods 0.000 description 40
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 24
- 239000011651 chromium Substances 0.000 description 22
- 238000006243 chemical reaction Methods 0.000 description 21
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 18
- 238000001704 evaporation Methods 0.000 description 17
- 229910052804 chromium Inorganic materials 0.000 description 16
- 238000012360 testing method Methods 0.000 description 16
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 15
- 230000008020 evaporation Effects 0.000 description 15
- 238000003860 storage Methods 0.000 description 14
- -1 iron (II) compound Chemical class 0.000 description 13
- 229910052751 metal Inorganic materials 0.000 description 12
- 239000002184 metal Substances 0.000 description 12
- 239000000203 mixture Substances 0.000 description 11
- SURQXAFEQWPFPV-UHFFFAOYSA-L iron(2+) sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Fe+2].[O-]S([O-])(=O)=O SURQXAFEQWPFPV-UHFFFAOYSA-L 0.000 description 10
- XBDUTCVQJHJTQZ-UHFFFAOYSA-L iron(2+) sulfate monohydrate Chemical compound O.[Fe+2].[O-]S([O-])(=O)=O XBDUTCVQJHJTQZ-UHFFFAOYSA-L 0.000 description 10
- 238000006386 neutralization reaction Methods 0.000 description 10
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 10
- 239000005569 Iron sulphate Substances 0.000 description 9
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 9
- 238000001816 cooling Methods 0.000 description 9
- 238000001914 filtration Methods 0.000 description 9
- 238000002156 mixing Methods 0.000 description 9
- 238000002360 preparation method Methods 0.000 description 9
- 239000000243 solution Substances 0.000 description 9
- 229910021653 sulphate ion Inorganic materials 0.000 description 9
- 239000004408 titanium dioxide Substances 0.000 description 9
- 238000007711 solidification Methods 0.000 description 8
- 230000008023 solidification Effects 0.000 description 8
- 150000001875 compounds Chemical class 0.000 description 7
- 239000012065 filter cake Substances 0.000 description 7
- 239000002245 particle Substances 0.000 description 6
- 230000001603 reducing effect Effects 0.000 description 6
- 239000002002 slurry Substances 0.000 description 6
- 239000000654 additive Substances 0.000 description 5
- 230000000996 additive effect Effects 0.000 description 4
- 239000003513 alkali Substances 0.000 description 4
- 238000007664 blowing Methods 0.000 description 4
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 description 4
- 238000002425 crystallisation Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000008187 granular material Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 150000004682 monohydrates Chemical class 0.000 description 4
- 229910021646 siderite Inorganic materials 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 3
- 239000006227 byproduct Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 239000000383 hazardous chemical Substances 0.000 description 3
- 150000004688 heptahydrates Chemical class 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000011164 primary particle Substances 0.000 description 3
- 238000012958 reprocessing Methods 0.000 description 3
- 230000005070 ripening Effects 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 230000009974 thixotropic effect Effects 0.000 description 3
- 206010020751 Hypersensitivity Diseases 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 208000026935 allergic disease Diseases 0.000 description 2
- 230000007815 allergy Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000000635 electron micrograph Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- 229910021506 iron(II) hydroxide Inorganic materials 0.000 description 2
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 2
- NCNCGGDMXMBVIA-UHFFFAOYSA-L iron(ii) hydroxide Chemical compound [OH-].[OH-].[Fe+2] NCNCGGDMXMBVIA-UHFFFAOYSA-L 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- IYVLHQRADFNKAU-UHFFFAOYSA-N oxygen(2-);titanium(4+);hydrate Chemical compound O.[O-2].[O-2].[Ti+4] IYVLHQRADFNKAU-UHFFFAOYSA-N 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 206010012442 Dermatitis contact Diseases 0.000 description 1
- 239000004277 Ferrous carbonate Substances 0.000 description 1
- 101100476641 Homo sapiens SAMM50 gene Proteins 0.000 description 1
- 229910021607 Silver chloride Inorganic materials 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 102100035853 Sorting and assembly machinery component 50 homolog Human genes 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000006286 aqueous extract Substances 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 238000001636 atomic emission spectroscopy Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000000861 blow drying Methods 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- BFGKITSFLPAWGI-UHFFFAOYSA-N chromium(3+) Chemical compound [Cr+3] BFGKITSFLPAWGI-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 208000010247 contact dermatitis Diseases 0.000 description 1
- 238000012864 cross contamination Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- MSNWSDPPULHLDL-UHFFFAOYSA-K ferric hydroxide Chemical compound [OH-].[OH-].[OH-].[Fe+3] MSNWSDPPULHLDL-UHFFFAOYSA-K 0.000 description 1
- RAQDACVRFCEPDA-UHFFFAOYSA-L ferrous carbonate Chemical compound [Fe+2].[O-]C([O-])=O RAQDACVRFCEPDA-UHFFFAOYSA-L 0.000 description 1
- 235000019268 ferrous carbonate Nutrition 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000002354 inductively-coupled plasma atomic emission spectroscopy Methods 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 150000002506 iron compounds Chemical class 0.000 description 1
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 description 1
- 229910000015 iron(II) carbonate Inorganic materials 0.000 description 1
- 239000006148 magnetic separator Substances 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- SQQMAOCOWKFBNP-UHFFFAOYSA-L manganese(II) sulfate Chemical compound [Mn+2].[O-]S([O-])(=O)=O SQQMAOCOWKFBNP-UHFFFAOYSA-L 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000012452 mother liquor Substances 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- FWFGVMYFCODZRD-UHFFFAOYSA-N oxidanium;hydrogen sulfate Chemical compound O.OS(O)(=O)=O FWFGVMYFCODZRD-UHFFFAOYSA-N 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 229920003223 poly(pyromellitimide-1,4-diphenyl ether) Polymers 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000002601 radiography Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011833 salt mixture Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/69—Sulfur trioxide; Sulfuric acid
- C01B17/90—Separation; Purification
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/69—Sulfur trioxide; Sulfuric acid
- C01B17/90—Separation; Purification
- C01B17/901—Recovery from spent acids containing metallic ions, e.g. hydrolysis acids, pickling acids
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/69—Sulfur trioxide; Sulfuric acid
- C01B17/88—Concentration of sulfuric acid
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G23/00—Compounds of titanium
- C01G23/04—Oxides; Hydroxides
- C01G23/047—Titanium dioxide
- C01G23/053—Producing by wet processes, e.g. hydrolysing titanium salts
- C01G23/0532—Producing by wet processes, e.g. hydrolysing titanium salts by hydrolysing sulfate-containing salts
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
- C01G49/14—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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/08—Acids or salts thereof
- C04B22/14—Acids or salts thereof containing sulfur in the anion, e.g. sulfides
-
- 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, 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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/62—Submicrometer sized, i.e. from 0.1-1 micrometer
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/04—Working-up slag
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Removal Of Specific Substances (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Compounds Of Iron (AREA)
- Catalysts (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2003132530 DE10332530A1 (de) | 2003-07-17 | 2003-07-17 | Verfahren zur Reduktion des löslichen Chromatgehaltes in Zement sowie eine Zubereitung aus Zement und wasserlöslichen Metallsulfaten |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ZA200600429B true ZA200600429B (en) | 2006-10-25 |
Family
ID=34041920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ZA200600429A ZA200600429B (en) | 2003-07-17 | 2006-01-16 | Reducing agent for the soluble chromate content of cement and methods for the production thereof |
Country Status (22)
| Country | Link |
|---|---|
| US (2) | US20070039522A1 (ja) |
| EP (2) | EP1648840B2 (ja) |
| JP (1) | JP2009500268A (ja) |
| KR (1) | KR20060036459A (ja) |
| CN (2) | CN101177339A (ja) |
| BR (1) | BRPI0412676A (ja) |
| CA (1) | CA2531218A1 (ja) |
| CY (1) | CY1107528T1 (ja) |
| DE (5) | DE20321107U1 (ja) |
| DK (1) | DK1648840T3 (ja) |
| EG (1) | EG24489A (ja) |
| ES (1) | ES2253140T3 (ja) |
| HR (1) | HRP20070161T3 (ja) |
| MX (1) | MXPA06000581A (ja) |
| NO (1) | NO20060640L (ja) |
| PL (1) | PL1648840T3 (ja) |
| PT (1) | PT1648840E (ja) |
| RU (1) | RU2347763C2 (ja) |
| SI (1) | SI1648840T2 (ja) |
| UA (1) | UA88769C2 (ja) |
| WO (1) | WO2005009917A1 (ja) |
| ZA (1) | ZA200600429B (ja) |
Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20321107U1 (de) | 2003-07-17 | 2005-12-15 | Kerr-Mcgee Pigments Gmbh | Zubereitung zur Reduktion des löslichen Chromatgehaltes in Zement |
| WO2005056860A2 (en) * | 2003-11-21 | 2005-06-23 | W. R. Grace & Co.-Conn | Sulfate dispersion chromate reducer |
| EP1544182B2 (de) † | 2003-12-12 | 2016-04-06 | Kehrmann Alexander | Hydraulisches Bindemittel |
| EP1559694A3 (de) * | 2004-01-27 | 2007-12-12 | Kronos International, Inc. | Pulverförmige Mischung, Verfahren zu ihrer Herstellung und ihre Verwendung zur Chromatreduktion in Zement |
| DE102004059047B4 (de) * | 2004-12-07 | 2007-10-31 | Tronox Pigments Gmbh | Verfahren zur Herstellung eines eisensulfhaltigen Reduktionsmittels und dessen Verwendung |
| DE502005007616D1 (de) | 2005-04-08 | 2009-08-13 | Alexander Kehrmann | Verfahren zur Herstellung eines hydraulischen Bindemittels |
| DE102005044941A1 (de) * | 2005-09-20 | 2007-03-22 | Eric Blauenstein | Verfahren und Mittel zur reduktiven Chromatentgiftung von Zementzubereitungen |
| EP2055684A1 (en) * | 2006-06-27 | 2009-05-06 | Aditivos Del Cemento, S.L. | Method of obtaining an additive for cement and additive thus achieved |
| WO2008000887A1 (en) | 2006-06-28 | 2008-01-03 | Sachtleben Pigments Oy | Method of treating a precipitate comprising iron (ii) sulphate monohydrate, a plant, granular material and its uses |
| ES2316283B1 (es) * | 2007-05-31 | 2010-02-05 | Fertisac, S.L. | Procedimiento de fabricacion de sulfato ferroso granulado como aditivo para cementeras. |
| FR2917082A1 (fr) * | 2007-06-08 | 2008-12-12 | Lafarge Sa | "additif pour composition a base ciment" |
| EP2000444B1 (fr) * | 2007-06-08 | 2011-03-02 | Lafarge | Additif pour composition à base de ciment |
| WO2012098126A2 (de) | 2011-01-18 | 2012-07-26 | Crenox Gmbh | Verfahren zur gewinnung von elementen oder elementverbindungen aus den bei der produktion von titandioxid anfallenden zwischen- oder nebenprodukten |
| CN102503209A (zh) * | 2011-11-17 | 2012-06-20 | 北京凯盛建材工程有限公司 | 一种消除铬污染的水泥及其制备方法以及一种治理水泥铬污染的方法 |
| CN106800283B (zh) * | 2015-11-26 | 2019-12-31 | 贵州川恒化工股份有限公司 | 粉状消防级磷酸一铵的生产方法 |
| CN109160492B (zh) * | 2018-09-04 | 2022-04-12 | 宜宾丝丽雅股份有限公司 | 一种硫磺膏洗涤系统及方法 |
| CN111389363B (zh) * | 2020-04-02 | 2022-02-11 | 四川省地质矿产勘查开发局四0五地质队 | 一种基于硫酸盐还原污泥的磁性生物炭吸附材料及其制备方法和应用 |
| 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 |
| KR102574091B1 (ko) | 2021-09-28 | 2023-09-01 | 정찬일 | 매립 가스 유래 바이오 황을 이용한 시멘트 6가 크롬 저감제, 및 그 제조방법 |
| CN114656173A (zh) * | 2022-03-03 | 2022-06-24 | 冀东水泥(烟台)有限责任公司 | 一种利用气化渣生产水泥熟料的方法 |
Family Cites Families (37)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1626623A (en) * | 1926-06-30 | 1927-05-03 | George S Morgan | Process of removing deterrent salts from pickling liquors |
| US3016286A (en) † | 1960-02-29 | 1962-01-09 | Ishihara Sangyo Kaisha | Method for the treatment of waste acid resulting from titanium dioxide production |
| NL273476A (ja) * | 1961-01-26 | 1900-01-01 | ||
| JPS5043123A (ja) * | 1973-08-21 | 1975-04-18 | ||
| DE2630196A1 (de) † | 1976-07-05 | 1978-01-19 | Bayer Ag | Verfahren zur herstellung von schwefelsaeure aus abfallsaeure und eisensulfat |
| 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 |
| GR79711B (ja) † | 1983-01-20 | 1984-10-31 | Cementa Ab | |
| US4505886A (en) * | 1983-07-01 | 1985-03-19 | Nl Industries, Inc. | Process for preparing high quality titanium dioxide |
| DE3327770A1 (de) * | 1983-08-02 | 1985-02-14 | Bayer Ag, 5090 Leverkusen | Verfahren zur aufarbeitung metallsulfathaltiger schwefelsaeuren |
| DE3327769A1 (de) † | 1983-08-02 | 1985-02-14 | Bayer Ag, 5090 Leverkusen | Verfahren zur aufarbeitung von duennsaeuren |
| DE3329842A1 (de) * | 1983-08-18 | 1985-02-28 | Kronos Titan-Gesellschaft Mbh, 5090 Leverkusen | Verfahren zur weitgehenden entfernung unerwuenschter metallionen, insbesondere vanadiumionen, bei der aufkonzentrierung verduennter eisen(ii)-sulfathaltiger schwefelsaeureloesungen |
| DE3343257A1 (de) * | 1983-11-30 | 1985-06-05 | Bayer Ag, 5090 Leverkusen | Verfahren zur herstellung von titandioxid |
| DE3724677A1 (de) † | 1987-07-25 | 1989-02-02 | Kronos Titan Gmbh | Verfahren zur aufarbeitung von eisen(ii)-sulfathaltigen metallsulfatgemischen |
| DE3724676A1 (de) * | 1987-07-25 | 1989-02-02 | Kronos Titan Gmbh | Verfahren zur aufarbeitung von eisen(ii)-sulfathaltigen metallsulfatgemischen |
| EP0362428B1 (de) * | 1988-10-06 | 1992-12-23 | KRONOS TITAN-Gesellschaft mbH | Verfahren und Vorrichtung zur Aufarbeitung einer Eisen(II) sulfat enthaltenden Schwefelsäurelösung |
| DK93690D0 (da) * | 1990-04-11 | 1990-04-11 | Aalborg Portland Cement | Cementkomposition |
| ES2049127B1 (es) † | 1991-06-13 | 1994-10-01 | Tioxide Espa A S A | Corrector de carencias de microelementos para suelos agricolas y procedimiento para su preparacion. |
| ES2146628T3 (es) † | 1993-08-12 | 2000-08-16 | Kerr Mcgee Pigments Gmbh & Co | Procedimiento para la elaboracion de acido diluido. |
| DE4344359C2 (de) * | 1993-12-24 | 1996-09-19 | Bayer Ag | Verfahren zur Herstellung von Titandioxid nach dem Sulfatverfahren |
| FI100966B (sv) * | 1995-04-21 | 1998-03-31 | Kemira Pigments Oy | Förfarande för behandling av ferrosulfat |
| TW477818B (en) * | 1997-03-27 | 2002-03-01 | Kawasaki Steel Co | Method for processing chromium oxide-containing substances in large quantities, method for utilizing the processed substances, and products comprising the processed substances |
| JP3221565B2 (ja) * | 1997-09-30 | 2001-10-22 | 川崎製鉄株式会社 | クロム酸化物含有物質の処理方法およびそれを用いた路盤材、土木埋立用材、仮設材 |
| JP3273899B2 (ja) * | 1997-03-28 | 2002-04-15 | 日鉄鉱業株式会社 | 第一鉄化合物を含有する廃塩酸より高純度の硫酸第一鉄又はポリ硫酸鉄を製造する方法 |
| AU744330B2 (en) * | 1997-05-30 | 2002-02-21 | Kemicraft Overseas Limited | Continuous non-polluting liquid phase titanium dioxide process |
| US6048505A (en) * | 1997-06-16 | 2000-04-11 | Kemicraft Overseas Limited | Continuous non-polluting liquid phase titanium dioxide process and apparatus |
| DE19744035C2 (de) * | 1997-10-06 | 2000-09-28 | Verein Deutscher Zementwerke E | Verfahren zur Zugabe eines Zusatzmittels zu einem Zement, der Hautekzeme verursachendes Chromat enthält und dem Eisen(II)-sulfat zugemischt wird |
| DE19812261A1 (de) † | 1998-03-20 | 1999-09-23 | Bayer Ag | Verfahren zur Aufarbeitung von Dünnsäure aus der TiO¶2¶-Herstellung |
| DE10014468C2 (de) * | 2000-01-07 | 2003-10-30 | Ferro Duo Gmbh | Verfahren zur Herstellung eines Baustoffs |
| JP4358400B2 (ja) * | 2000-02-08 | 2009-11-04 | 太平洋セメント株式会社 | セメント添加剤 |
| JP2002003253A (ja) * | 2000-06-16 | 2002-01-09 | Yukie Kitamura | セメントの処理剤及び処理方法 |
| JP4818503B2 (ja) * | 2000-09-20 | 2011-11-16 | 電気化学工業株式会社 | 低６価クロム注入材 |
| JP2003146725A (ja) * | 2001-11-14 | 2003-05-21 | Taiheiyo Cement Corp | 水硬性組成物 |
| DE10157129C2 (de) † | 2001-11-21 | 2003-10-30 | Ferro Duo Gmbh | Verfahren zur Herstellung eines hydraulischen Bindemittels |
| DE20321107U1 (de) † | 2003-07-17 | 2005-12-15 | Kerr-Mcgee Pigments Gmbh | Zubereitung zur Reduktion des löslichen Chromatgehaltes in Zement |
| EP1544182B2 (de) * | 2003-12-12 | 2016-04-06 | Kehrmann Alexander | Hydraulisches Bindemittel |
| WO2008000887A1 (en) † | 2006-06-28 | 2008-01-03 | Sachtleben Pigments Oy | Method of treating a precipitate comprising iron (ii) sulphate monohydrate, a plant, granular material and its uses |
-
2003
- 2003-07-17 DE DE2003221107 patent/DE20321107U1/de not_active Ceased
- 2003-07-17 DE DE2003132530 patent/DE10332530A1/de not_active Withdrawn
-
2004
- 2004-07-16 MX MXPA06000581A patent/MXPA06000581A/es active IP Right Grant
- 2004-07-16 DE DE200420021087 patent/DE202004021087U1/de not_active Expired - Lifetime
- 2004-07-16 US US10/564,651 patent/US20070039522A1/en not_active Abandoned
- 2004-07-16 DK DK04741082T patent/DK1648840T3/da active
- 2004-07-16 PT PT04741082T patent/PT1648840E/pt unknown
- 2004-07-16 JP JP2006519890A patent/JP2009500268A/ja active Pending
- 2004-07-16 BR BRPI0412676 patent/BRPI0412676A/pt not_active IP Right Cessation
- 2004-07-16 EP EP04741082.4A patent/EP1648840B2/de active Active
- 2004-07-16 CA CA 2531218 patent/CA2531218A1/en not_active Abandoned
- 2004-07-16 KR KR20067001163A patent/KR20060036459A/ko not_active Application Discontinuation
- 2004-07-16 ES ES04741082T patent/ES2253140T3/es active Active
- 2004-07-16 CN CNA2007101491655A patent/CN101177339A/zh active Pending
- 2004-07-16 EP EP20070000770 patent/EP1780183A3/de not_active Withdrawn
- 2004-07-16 DE DE200450002695 patent/DE502004002695D1/de active Active
- 2004-07-16 PL PL04741082T patent/PL1648840T3/pl unknown
- 2004-07-16 RU RU2006104846A patent/RU2347763C2/ru not_active IP Right Cessation
- 2004-07-16 SI SI200430212T patent/SI1648840T2/sl unknown
- 2004-07-16 UA UAA200601552A patent/UA88769C2/uk unknown
- 2004-07-16 CN CNB2004800206136A patent/CN100528786C/zh not_active Expired - Fee Related
- 2004-07-16 DE DE200420018827 patent/DE202004018827U1/de not_active Ceased
- 2004-07-16 WO PCT/EP2004/007940 patent/WO2005009917A1/de active IP Right Grant
-
2006
- 2006-01-16 ZA ZA200600429A patent/ZA200600429B/en unknown
- 2006-01-17 EG EGNA2006000049 patent/EG24489A/xx active
- 2006-02-09 NO NO20060640A patent/NO20060640L/no not_active Application Discontinuation
-
2007
- 2007-04-04 CY CY071100472T patent/CY1107528T1/el unknown
- 2007-04-13 HR HR20070161T patent/HRP20070161T3/xx unknown
-
2012
- 2012-02-13 US US13/371,783 patent/US8808451B2/en not_active Expired - Fee Related
Also Published As
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8808451B2 (en) | Reducing agent for the soluble chromate content of cement and methods for production thereof | |
| JP3710471B2 (ja) | セメント用のアルカリ分の少ない凝結促進剤としての塩基性硫酸アルミニウムの使用 | |
| CA2677778A1 (en) | A solidification and hardening accelerator for hydraulic binders and process for its preparation | |
| CN112570419B (zh) | 一种铝灰回收利用方法、无害化铝灰及其应用 | |
| WO2015153873A1 (en) | System and methods for removing impurities from phosphogypsum and manufacturing gypsum binders and products | |
| FI100966B (sv) | Förfarande för behandling av ferrosulfat | |
| JP6804132B2 (ja) | けい酸質肥料およびその製造方法 | |
| EP1892219B1 (en) | Method of treating a precipitate comprising iron(II)sulphate monohydrate, a plant, granular material and its uses | |
| US8128903B2 (en) | Method of treating a precipitate comprising iron (II) sulfate monohydrate, a plant, granular material and its uses | |
| JP2003055033A (ja) | フッ化カルシウム（ＣａＦ２）へどろの再利用方法及び再利用化製品 | |
| US4402922A (en) | Process for rapid conversion of fluoroanhydrite to gypsum | |
| DK1926692T3 (en) | PROCEDURE FOR PREPARING A CHROMAT REDUCTOR FOR CEMENT COMPOSITIONS | |
| JP7079101B2 (ja) | けい酸質肥料の製造方法 | |
| CN106745129B (zh) | 一种硅铝渣中铝硅的分离方法 | |
| CN107352566B (zh) | 酸法提铝或粉煤灰酸法提铝所得氧化铝的改性方法和改性氧化铝及电解铝生产中应用 | |
| Tan et al. | Preparation of calcium sulfate hemihydrate whiskers from complex jarosite waste | |
| WO2012065844A1 (en) | Process for producing a modified grade of iron sulphate heptahydrate | |
| US2560338A (en) | Chromic oxide production particularly for pigment purposes | |
| CN115368042A (zh) | 一种利用氟石膏与石英废石生产多孔性硅灰石球粒的方法 | |
| CN116209646A (zh) | 将水泥中含有的Cr（VI）还原为Cr（III）的混合物 | |
| CN102115085A (zh) | 一种利用磷渣生产二氧化硅和氢氧化钙的方法 | |
| JPH02279516A (ja) | アルカリ土類金属のアミド硫酸塩粉末の製造方法 |