• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    1521405 Recovery of chromium LUIGI STOPPANI SpA 13 July 1976 [28 Aug 1975] 29120/76 Heading CIA Solid waste residues from chromic anhydride production are treated to recover chromium chromate, XCrO 3 .YCr 2 O 3 .nH 2 O therefrom by reacting an aqueous slurry of the solid waste residues with sodium chromate solution for 10-600 mins. in a reactor, the specific gravity of the mixture being 1À2-1À4, to prevent precipitation of sodium sulphate, under conditions in the reactor of a pH 2-8 and temperature of 70-250‹ C., and curing the reaction mixture in a curing vessel for 10-600 minutes atpH 2-8 and 70-250‹ C. and separating the resultant chromium chromate by filtration. The reaction with sodium chromate may be continuous or batchwise.
    公开号:SU1068025A3
    申请号:SU762386207
    申请日:1976-07-26
    公开日:1984-01-15
    发明作者:Перроне Дьего
    申请人:Луиджи Стоппани Ди П.Стоппани Энд К.С.Н.К. (Фирма)；
    IPC主号:
    专利说明:

    Invention from; axis1 -; t to ;;, - :: - processing prices.; Yf frac1.i: m, cr; / - ,; x; ats-ihs R otkholakh psizvo.ggggg-p pomovogo ang1shu.-il
    Known sposos er €; r bG: T; h: and ZZOPST5EEIKYKh waste (D5iC; j; bi); nolo melt) CHROMIUM h i: ri.; rf: ;;; i :: g; including them Eza -:; Ch oce;, t and:: with gnokhromat G: ii Vn - S (::.; 5l1 / - & ih with after that: ai 1: j and EN i ,, 7-501 m. TOPOLO-.o JKJJO.-U- :;
    Koddostytko Y- :; iio-Hovx-; c;).:, n is neither: g: ha; | g: - {about: ogtg | f - ll-DCH (1.2 M.: ..)
    Whole iso-retetil kzl: -;: h - iueHRS- CKODOOT /: oi; ibjT; a.V «.
    Potailen;; ;; / ios ios: aa t: g .-:
    Telvi, Uj-O CO,; - OiC;: o c :: DO:; b HYuCH.;: 5th line; -. ironoseodig / wooci - o- O-, L:;. ::; m, g ;;;., g; :; -ajo-ncif-iy. -l: processing paoTi; iopO; v, -KJI-O. ; o: pi-o ori. uoeirSjjeKHoft tl;. p; ate; - :; i OP o
    ; to reactors; oops ;;; vieo; i otsck o, temperature o: .o -: - o, sediment chro, 5and p ol-a. p o ;;, i LOD-TAO;
    - Г O; t: o--; about (sbrazo.
    3 peauTOi
    ; jyiO D -1SPORO.
    gd; x
    hydride; Os
    pus-ko; by the 4xo6i. sulfate to:; support
    -; G; t t g;, j
    WG environment: g; With KpHCxajiJ filter 6 npi-icyTCj
    WILD 3i
    权利要求:
    Claims (3)
    [1]
    1. METHOD FOR PROCESSING INDUSTRIAL WASTE OF CHROMIUM ANHYDRIDE, including treating with sodium monochromate solution at elevated temperature, followed by exposure of the resulting reaction mixture to elevated temperature and separation of the precipitated chromium chromate by filtration, characterized in that, in order to increase the filtration rate, the reaction mixture is aged at 70-103 ° C and a pH value of 2-8.
    [2]
    2. The method according to claim 1, characterized in that the treatment with a solution of sodium monochromate is carried out at 70-103 ° C and a pH of 2-8.
    [3]
    3. The method according to claim 1, characterized in that the exposure of the reaction mixture is carried out for 10-
    类似技术:
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    SU1068025A3|1984-01-15|Method for processing industrial wastes of chromium anhydride
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    US4548792A|1985-10-22|Method for precipitating vanadium from vanadium bearing liquors and recovering vanadium pentoxide
    US4108596A|1978-08-22|Recovery of chromium values from waste streams by the use of alkaline magnesium compounds
    GB768946A|1957-02-27|Improvements in and relating to the recovery of uranium values
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    JPS5440213A|1979-03-29|Separation method
    US2488561A|1949-11-22|Method for the separation of cobalt and nickel from solutions
    JPS5520666A|1980-02-14|Sludge recovery method
    US1733700A|1929-10-29|Recovery of vanadium
    US2639216A|1953-05-19|Removal of halide ions from chromate liquors
    SU1361110A1|1987-12-23|Method of regeneration of used chromium-containing solutions
    SU565877A1|1977-07-25|Method of obtaining strontium carbonate
    SU431118A1|1974-06-05|METHOD OF OBTAINING SODIUM BICHROMAG
    US2779657A|1957-01-29|Recovery of uranium from wash liquids
    GB2042489A|1980-09-24|Production of a substantially iron-free chromium | compound
    SU812752A1|1981-03-15|Method of waste water purification from chromium
    US2628154A|1953-02-10|Method of recovering chromates and vanadates from aqueous solution
    GB1371113A|1974-10-23|Method of collecting sludge from waste water used in washing of gases from metallurgical processes
    SU546565A1|1977-02-15|The method of producing chromium oxide
    CA1083825A|1980-08-19|Process for concentration of titanium ore
    RU93051949A|1997-01-27|METHOD FOR PROCESSING STRONTIUM CONCENTRATE IN STRONTIUM CARBONATE
    SU676559A1|1979-07-30|Chromium hydroxide producing method
    同族专利:
    公开号 | 公开日
    IT1042133B|1980-01-30|
    ZA764123B|1977-06-29|
    US4045340A|1977-08-30|
    DE2633570C3|1979-02-01|
    IN145701B|1978-12-02|
    GB1521405A|1978-08-16|
    DE2633570B2|1978-06-01|
    FR2322099A1|1977-03-25|
    ES449926A1|1977-12-01|
    RO72146A|1982-10-26|
    DE2633570A1|1977-03-03|
    BR7604998A|1977-08-09|
    JPS5230289A|1977-03-07|
    FR2322099B1|1980-04-30|
    JPS5551854B2|1980-12-26|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    GB739760A|1953-03-20|1955-11-02|Diamond Alkali Co|Improvements in or relating to the manufacture of solid chromic anhydride|
    US3002815A|1958-07-17|1961-10-03|Bayer Ag|Process for the production of chromium trioxide|
    JPS5021992B1|1968-02-17|1975-07-26|
    AU452489B2|1971-03-04|1974-08-16|Montecatini Edisons. P. A|Process for preparing ferromagnetic chromium dioxide|NL7802123A|1978-02-25|1979-08-28|Akzo Nv|PROCEDURE FOR REMOVING HEAVY METALS FROM Aqueous SUBSTANCES.|
    DE3222567C2|1982-06-16|1986-06-05|Schott Glaswerke, 6500 Mainz|Colorless barium silicate glass containing cerium and phosphorus with good scintillation properties|
    JPS6199334U|1984-12-03|1986-06-25|
    IT1216507B|1988-03-23|1990-03-08|Stoppani Luigi Spa|PROCEDURE FOR THE RECOVERY OF CHROMIUM DIOXIDE FROM EXHAUSTED AQUEOUS SOLUTIONS OF CHROME BATHS WITH VALORISATION OF RECOVERED CHROME.|
    DE3815240A1|1988-05-05|1989-11-16|Bayer Ag|METHOD FOR PRODUCING NA DICHROMATE|
    US5393503A|1991-09-09|1995-02-28|Occidental Chemical Corporation|Process for making chromic acid|
    CN102320685B|2011-05-31|2013-01-23|重庆民丰化工有限责任公司|Processing method of sodium bisulfate waste liquid in chromic anhydride preparation process|
    CN103449522B|2012-06-01|2016-03-09|中国科学院过程工程研究所|A kind of chromium residue produces the method for chromic salt|
    CN104726689B|2013-12-24|2017-05-10|中国科学院过程工程研究所|Method for decomposing chromite by low-temperature atmospheric-pressure fluidization|
    CN104843790B|2015-05-22|2016-11-30|四川省银河化学股份有限公司|A kind of chromite oxidizing method preparing sodium chromate of acid|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    IT26686/75A|IT1042133B|1975-08-28|1975-08-28|PROCEDURE FOR THE RECOVERY AND VALORISATION OF THE WASTE FROM THE MANUFACTURE OF ANIDRI DE CROMICA|
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