BE632837A - - Google Patents

Info

Publication number
BE632837A
BE632837A BE632837DA BE632837A BE 632837 A BE632837 A BE 632837A BE 632837D A BE632837D A BE 632837DA BE 632837 A BE632837 A BE 632837A
Authority
BE
Belgium
Application number
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.)
Publication date
Publication of BE632837A publication Critical patent/BE632837A/xx

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B7/00—Halogens; Halogen acids
    • C01B7/19—Fluorine; Hydrogen fluoride
    • C01B7/191—Hydrogen fluoride

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
  • Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
  • Removal Of Specific Substances (AREA)
BE632837D 1962-06-04 BE632837A (ko)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US199642A US3166379A (en) 1962-06-04 1962-06-04 Purification of hydrofluoric acid

Publications (1)

Publication Number Publication Date
BE632837A true BE632837A (ko) 1963-10-21

Family

ID=22738410

Family Applications (1)

Application Number Title Priority Date Filing Date
BE632837D BE632837A (ko) 1962-06-04

Country Status (4)

Country Link
US (1) US3166379A (ko)
BE (1) BE632837A (ko)
DE (1) DE1290529B (ko)
GB (1) GB993221A (ko)

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3339033A (en) * 1964-04-16 1967-08-29 Ledex Inc Rotary selector switch with cam operated contacts
US3663382A (en) * 1969-08-19 1972-05-16 Du Pont Process of recovering hydrogen fluoride free of arsenic by distillation
US4032621A (en) * 1975-11-24 1977-06-28 E. I. Du Pont De Nemours And Company Preparation of hydrogen fluoride with low levels of arsenic, iron and sulfite
US4083941A (en) * 1977-04-18 1978-04-11 E. I. Du Pont De Nemours And Company Purification of anhydrous hydrogen fluoride
US4424067A (en) 1982-07-29 1984-01-03 Allied Corporation Purification of anhydrous hydrogen fluoride
US4491570A (en) * 1984-05-03 1985-01-01 Pennwalt Corporation Removal of arsenic from hydrogen fluoride
US4668497A (en) * 1984-12-25 1987-05-26 Hashimoto Chemical Industries Co., Ltd. Process for purifying hydrogen fluoride
US4756899A (en) * 1987-02-12 1988-07-12 Allied-Signal Inc. Manufacture of high purity low arsenic anhydrous hydrogen fluoride
US4929435A (en) * 1987-02-12 1990-05-29 Allied-Signal Inc. Manufacture of high purity low arsenic anhydrous hydrogen fluoride
US4980032A (en) * 1988-08-12 1990-12-25 Alameda Instruments, Inc. Distillation method and apparatus for reprocessing sulfuric acid
US4936955A (en) * 1988-08-12 1990-06-26 Alameda Instruments, Inc. Hydrofluoric acid reprocessing for semiconductor standards
US5061348A (en) * 1988-08-12 1991-10-29 Alameda Instruments Sulfuric acid reprocessor with continuous purge of second distillation vessel
US5047226A (en) * 1988-12-12 1991-09-10 Fluorex, S.A. De C.V. Process for the removal of arsenic in the manufacture of hydrofluoric acid
US4990320A (en) * 1989-10-31 1991-02-05 E. I. Du Pont De Nemours And Company Process for purifying hydrogen fluoride
US4960580A (en) * 1989-10-31 1990-10-02 E. I. Du Pont De Nemours And Company Process for purifying hydrogen fluoride
US4954330A (en) * 1989-11-30 1990-09-04 E. I. Dupont De Nemours And Company Process for purifying hydrogen fluoride
DE4135918A1 (de) * 1991-10-31 1993-05-06 Solvay Fluor Und Derivate Gmbh, 3000 Hannover, De Herstellung von hochreinem fluorwasserstoff
DE4135917C2 (de) * 1991-10-31 1998-07-16 Solvay Fluor & Derivate Verfahren zur Abtrennung von organischen Kohlenstoffverbindungen aus Fluorwasserstoff
US5108559A (en) * 1991-12-17 1992-04-28 E. I. Du Pont De Nemours And Company Process for purifying hydrogen fluoride
DE4303837A1 (de) * 1993-02-10 1994-08-11 Bayer Ag Verfahren zur Reinigung von Fluorwasserstoff
GB0427968D0 (en) * 2004-12-21 2005-01-26 Davy Process Technology Switze Process
CN100443398C (zh) * 2006-10-09 2008-12-17 殷福华 高纯级氢氟酸的制备方法
CN100546903C (zh) * 2007-08-06 2009-10-07 江阴市润玛电子材料有限公司 超高纯氢氟酸的提纯方法
CN101570319B (zh) * 2008-04-28 2011-04-06 多氟多化工股份有限公司 一种生产超净高纯氢氟酸的方法
MX357878B (es) 2014-12-18 2018-07-27 Mexichem Fluor Sa De Capital Variable Proceso para la purificación del ácido fluorhídrico incluyendo la obtención del subproducto ácido arsenioso.
US11639302B2 (en) 2016-11-10 2023-05-02 Mexichem Fluor S.A. De C.V. Process for reducing the concentration of arsenic in an aqueous solution comprising a fluoroacid
CN107934915B (zh) * 2017-12-29 2020-12-29 云南瓮福云天化氟化工科技有限公司 —种无水氟化氢生产过程中杂质的净化方法
CN115433580B (zh) * 2022-10-27 2023-08-18 湖北九宁化学科技有限公司 一种光电行业蚀刻液的生产方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2777754A (en) * 1951-07-13 1957-01-15 Du Pont Purification of anhydrous hydrogen fluoride
US2952334A (en) * 1958-01-06 1960-09-13 Saint Gobain Preparation of anhydrous hydrofluoric acid
IT649940A (ko) * 1960-05-23

Also Published As

Publication number Publication date
GB993221A (en) 1965-05-26
US3166379A (en) 1965-01-19
DE1290529B (de) 1969-03-13

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