MX168731B - Dicromato de sodio anhidro en escamas; procedimiento y aparato para su preparacion a escala industrial - Google Patents

Dicromato de sodio anhidro en escamas; procedimiento y aparato para su preparacion a escala industrial

Info

Publication number
MX168731B
MX168731B MX000297A MX29785A MX168731B MX 168731 B MX168731 B MX 168731B MX 000297 A MX000297 A MX 000297A MX 29785 A MX29785 A MX 29785A MX 168731 B MX168731 B MX 168731B
Authority
MX
Mexico
Prior art keywords
degrees
anhydrous
flakes
dicromate
sodium
Prior art date
Application number
MX000297A
Other languages
English (en)
Inventor
Diego Perrone
Original Assignee
Stoppani Luigi Spa
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 Stoppani Luigi Spa filed Critical Stoppani Luigi Spa
Publication of MX168731B publication Critical patent/MX168731B/es

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G37/00—Compounds of chromium
    • C01G37/14—Chromates; Bichromates
    • 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
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/10—Process efficiency

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
  • Cosmetics (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)

Abstract

La presente invención se refiere a un procedimiento para preparar dicromato de sodio anhidro a partir de dihidrato de dicromato de sodio en cristales o en una solución concentrada, caracterizado porque se lleva a cabo continuamente en dos etapas, a una temperatura que se controla con precisión mediante una mezcla eutectica de sales fundidas; en terminos precisos, en la primera etapa se somete el dihidrato de dicromato o deshidratación-fusión rápidas, aproximadamente a 380 grados C y no más; en la segunda etapa, la masa fundida alimentada continuamente se enfría inmediatamente a 150-160 grados C, y se escama para formar un dicromato de sodio anhidro, sólido en escamas de alrededor de 1 cm cuadrado, 0.5 mm de espesor, con una densidad específica aparante de 1.10 a 25 grados C (densidad específica absoluta, 2.748 a 25 grados C).
MX000297A 1984-10-16 1985-10-16 Dicromato de sodio anhidro en escamas; procedimiento y aparato para su preparacion a escala industrial MX168731B (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT23155/84A IT1196296B (it) 1984-10-16 1984-10-16 Bicromato sodico anidro,in scaglie,procedimento ed impianto per prepararlo su scala industriale

Publications (1)

Publication Number Publication Date
MX168731B true MX168731B (es) 1993-06-07

Family

ID=11204356

Family Applications (1)

Application Number Title Priority Date Filing Date
MX000297A MX168731B (es) 1984-10-16 1985-10-16 Dicromato de sodio anhidro en escamas; procedimiento y aparato para su preparacion a escala industrial

Country Status (10)

Country Link
US (2) US4759922A (es)
JP (1) JPH075315B2 (es)
BR (1) BR8505155A (es)
DE (1) DE3536668C2 (es)
ES (1) ES8701135A1 (es)
GB (1) GB2166722B (es)
IT (1) IT1196296B (es)
MX (1) MX168731B (es)
SU (1) SU1637662A3 (es)
ZA (1) ZA857929B (es)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4205572A1 (de) * 1992-02-24 1993-08-26 Linde Ag Verfahren und reaktionsteilchen zur durchfuehrung von reaktionen
US6359128B1 (en) * 2000-07-18 2002-03-19 Isp Investments Inc. Free-flowing flakes of vinyl caprolactam monomer and process for making same
WO2012058801A1 (zh) * 2010-11-02 2012-05-10 天津派森科技有限责任公司 碳素铬铁水热氧化制备重铬酸的碱金属盐的方法
CN103183385A (zh) * 2013-03-27 2013-07-03 甘肃锦世化工有限责任公司 一种提高铬酸酐品质的方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1050485A (es) * 1900-01-01
DE228427C (es) *
DE424193C (de) * 1924-05-02 1926-01-18 Chemische Fabriken Kunheim & C Verfahren zur Herstellung von Natriumsulfid oder aehnlichen Chemikalien in Koerpern von vorausbestimmbarer Form und Groesse
US1979926A (en) * 1933-09-05 1934-11-06 Victor Chemical Works Water softener
FR1166102A (fr) * 1956-07-17 1958-11-03 Columbia Southern Chem Corp Procédé de préparation d'hexachlorure de benzène en paillettes s'écoulant librement
NL135611C (es) * 1961-07-24
US4171248A (en) * 1977-11-03 1979-10-16 Ppg Industries, Inc. Method of opening chrome ore
SU1010015A1 (ru) * 1981-12-05 1983-04-07 Предприятие П/Я А-1908 Способ получени безводного кристаллического бихромата натри

Also Published As

Publication number Publication date
IT8423155A0 (it) 1984-10-16
GB8525442D0 (en) 1985-11-20
US5037620A (en) 1991-08-06
IT8423155A1 (it) 1986-04-16
JPH075315B2 (ja) 1995-01-25
JPS61158825A (ja) 1986-07-18
GB2166722B (en) 1988-05-18
ES8701135A1 (es) 1986-12-01
ZA857929B (en) 1986-12-30
SU1637662A3 (ru) 1991-03-23
DE3536668A1 (de) 1986-04-17
DE3536668C2 (de) 1994-12-22
US4759922A (en) 1988-07-26
GB2166722A (en) 1986-05-14
BR8505155A (pt) 1986-07-29
ES547920A0 (es) 1986-12-01
IT1196296B (it) 1988-11-16

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