RO86328B1 - Process for preparing tellurium dioxide - Google Patents

Process for preparing tellurium dioxide

Info

Publication number
RO86328B1
RO86328B1 RO109951A RO10995183A RO86328B1 RO 86328 B1 RO86328 B1 RO 86328B1 RO 109951 A RO109951 A RO 109951A RO 10995183 A RO10995183 A RO 10995183A RO 86328 B1 RO86328 B1 RO 86328B1
Authority
RO
Romania
Prior art keywords
tellurium dioxide
tellurium
dioxide
precipitation
suspension
Prior art date
Application number
RO109951A
Other languages
Romanian (ro)
Other versions
RO86328A2 (en
Inventor
Jack Goldstein
Erna Bordas
Original Assignee
Institutul De Cercetare, Inginerie Tehnologica
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 Institutul De Cercetare, Inginerie Tehnologica filed Critical Institutul De Cercetare, Inginerie Tehnologica
Priority to RO109951A priority Critical patent/RO86328B1/en
Publication of RO86328A2 publication Critical patent/RO86328A2/en
Publication of RO86328B1 publication Critical patent/RO86328B1/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B19/00—Selenium; Tellurium; Compounds thereof
    • C01B19/004—Oxides; Hydroxides

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)

Abstract

Inventia se refera la un procedeu de obtinere a dioxidului de telur, prin oxidarea telurului tehnic cu acid azotic, urmata de tratarea dioxidului de telur astfel rezultat cu acid clorhidric si de separarea produsului prin precipitar cu hidroxid de sodiu, procedeu conform caruia, în scopul obtinerii produsului pur si cu greutate volumetrica ridicata, dupa precipitarea dioxidului de telur din tetraclorura de telur cu hidroxid de sodiu, la pH=5,2...6,5 dioxidul de telur astfel precipitat este spalat cu apa deionizata, la un raport S:L=1:3...1:4, pîna la eliminarea ionilor de sodiu, dupa care suspensia de dioxid de telur si apa deionizata, la unraport S:L=1,2, este supusa fierberii la temperatura de 102...105 degree C, timp de 30 min si apoi suspensia este filtrata iar recipientul obtinut se usuca la temparatura de 70...85 degree C.The invention relates to a process for obtaining tellurium dioxide by oxidation of technical tellurium with nitric acid, followed by treatment of the resulting tellurium dioxide with hydrochloric acid and separation of the product by precipitation with sodium hydroxide, according to which, in order to obtain of pure product and of high volumetric weight, after precipitation of tellurium dioxide from tellurium tetrachloride with sodium hydroxide, at pH = 5,2 ... 6,5, the thus precipitated tellurium dioxide is washed with deionized water at an S: L = 1: 3 ... 1: 4, until the sodium ions are eliminated, after which the suspension of tellurium dioxide and deionized water, at unport S: L = 1,2, is subjected to boiling at a temperature of 102 ... 105 ° C for 30 minutes and then the suspension is filtered and the obtained container is dried at 70-85 ° C.

RO109951A 1983-02-09 1983-02-09 Process for preparing tellurium dioxide RO86328B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RO109951A RO86328B1 (en) 1983-02-09 1983-02-09 Process for preparing tellurium dioxide

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RO109951A RO86328B1 (en) 1983-02-09 1983-02-09 Process for preparing tellurium dioxide

Publications (2)

Publication Number Publication Date
RO86328A2 RO86328A2 (en) 1985-03-15
RO86328B1 true RO86328B1 (en) 1985-03-31

Family

ID=20112653

Family Applications (1)

Application Number Title Priority Date Filing Date
RO109951A RO86328B1 (en) 1983-02-09 1983-02-09 Process for preparing tellurium dioxide

Country Status (1)

Country Link
RO (1) RO86328B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105271137B (en) * 2015-11-18 2017-12-01 金川集团股份有限公司 A kind of method that tellurium dioxide is extracted in the copper ashes from telluride

Also Published As

Publication number Publication date
RO86328A2 (en) 1985-03-15

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