GB883302A - Process for the removal of the nitrosyl compounds from sulphuric acid compounds - Google Patents

Process for the removal of the nitrosyl compounds from sulphuric acid compounds

Info

Publication number
GB883302A
GB883302A GB3659958A GB3659958A GB883302A GB 883302 A GB883302 A GB 883302A GB 3659958 A GB3659958 A GB 3659958A GB 3659958 A GB3659958 A GB 3659958A GB 883302 A GB883302 A GB 883302A
Authority
GB
United Kingdom
Prior art keywords
compounds
formaldehyde
sulphuric acid
nitrosyl
removal
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB3659958A
Inventor
Friedrich Wolf
Horst Hummel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Filmfabrik Wolfen VEB
Original Assignee
Filmfabrik Wolfen VEB
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 Filmfabrik Wolfen VEB filed Critical Filmfabrik Wolfen VEB
Priority to GB3659958A priority Critical patent/GB883302A/en
Publication of GB883302A publication Critical patent/GB883302A/en
Expired legal-status Critical Current

Links

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
    • C01B17/94—Recovery from nitration acids

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Nitrosyl compounds are removed from sulphuric acid by adding thereto at least one equivalent of formaldehyde with respect to the nitrogen oxides present. The acid, which may have a strength exceeding 70%, may be treated at 15 DEG -95 DEG C. temperature with or without stirring. The formaldehyde may be used as such, or may be added as an aqueous solution thereof, or as paraformaldehyde, or another compound which liberates formaldehyde under the reaction conditions, e.g. tri- or tetra-, oxymethylene, or aldehydeaddition compounds. Excess formaldehyde and NO formed are removed by blowing in air or inert gas.
GB3659958A 1958-11-13 1958-11-13 Process for the removal of the nitrosyl compounds from sulphuric acid compounds Expired GB883302A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3659958A GB883302A (en) 1958-11-13 1958-11-13 Process for the removal of the nitrosyl compounds from sulphuric acid compounds

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3659958A GB883302A (en) 1958-11-13 1958-11-13 Process for the removal of the nitrosyl compounds from sulphuric acid compounds

Publications (1)

Publication Number Publication Date
GB883302A true GB883302A (en) 1961-11-29

Family

ID=10389598

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3659958A Expired GB883302A (en) 1958-11-13 1958-11-13 Process for the removal of the nitrosyl compounds from sulphuric acid compounds

Country Status (1)

Country Link
GB (1) GB883302A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4155989A (en) * 1977-11-14 1979-05-22 Ciba-Geigy Corporation Removal of nitric acid from nitric acid-sulfuric acid mixtures

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4155989A (en) * 1977-11-14 1979-05-22 Ciba-Geigy Corporation Removal of nitric acid from nitric acid-sulfuric acid mixtures

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