GB492392A - Improvements in the manufacture and production of concentrated nitric acid and ammonium sulphate - Google Patents

Improvements in the manufacture and production of concentrated nitric acid and ammonium sulphate

Info

Publication number
GB492392A
GB492392A GB905637A GB905637A GB492392A GB 492392 A GB492392 A GB 492392A GB 905637 A GB905637 A GB 905637A GB 905637 A GB905637 A GB 905637A GB 492392 A GB492392 A GB 492392A
Authority
GB
United Kingdom
Prior art keywords
sulphuric acid
acid
ammonia
concentration
nitric acid
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
GB905637A
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.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie AG
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 IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Priority to GB905637A priority Critical patent/GB492392A/en
Publication of GB492392A publication Critical patent/GB492392A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
    • C01C1/00—Ammonia; Compounds thereof
    • C01C1/24—Sulfates of ammonium
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B21/00—Nitrogen; Compounds thereof
    • C01B21/20—Nitrogen oxides; Oxyacids of nitrogen; Salts thereof
    • C01B21/38—Nitric acid
    • C01B21/44—Concentration

Landscapes

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

Abstract

Concentrated nitric acid and ammonium sulphate are obtained by subjecting the dilute sulphuric acid, obtained in the concentration of aqueous nitric acid by means of concentrated sulphuric acid, while it is still hot to a partial or complete neutralization with ammonia, and supplying the vapours thus formed to the concentration or denitration apparatus instead of corresponding amounts of fresh steam. The ammonia may be introduced directly into the lower part of the concentration or denitration apparatus, or alternatively, the hot effluent dilute sulphuric acid may be treated with ammonia outside the column, the vapours formed being supplied to the column. It may be necessary to neutralize only a part of the sulphuric acid with ammonia, the remainder of the acid being branched off before the neutralization for other uses. Or the whole of the sulphuric acid may be neutralized in stages, the vapours necessary for the nitric acid being produced in the first stage and the vapours produced in the second stage being otherwise used, e.g. for the preliminary concentration of dilute nitric acid or for the evaporation of the ammonium sulphate solution. When only a proportion of the ammonia necessary to neutralize the sulphuric acid is supplied directly to the lower part of the concentration apparatus, the solution of ammonium bisulphate or polysulphate in sulphuric acid may be completely neutralized to ammonium sulphate outside the tower. Alternatively, the acid solution may be freed from bisulphate and polysulphate by cooling and filtration, the resulting salts only being completely neutralized and the dilute sulphuric acid being used for other purposes.
GB905637A 1937-03-30 1937-03-30 Improvements in the manufacture and production of concentrated nitric acid and ammonium sulphate Expired GB492392A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB905637A GB492392A (en) 1937-03-30 1937-03-30 Improvements in the manufacture and production of concentrated nitric acid and ammonium sulphate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB905637A GB492392A (en) 1937-03-30 1937-03-30 Improvements in the manufacture and production of concentrated nitric acid and ammonium sulphate

Publications (1)

Publication Number Publication Date
GB492392A true GB492392A (en) 1938-09-20

Family

ID=9864535

Family Applications (1)

Application Number Title Priority Date Filing Date
GB905637A Expired GB492392A (en) 1937-03-30 1937-03-30 Improvements in the manufacture and production of concentrated nitric acid and ammonium sulphate

Country Status (1)

Country Link
GB (1) GB492392A (en)

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