GB747785A - Production of oleum - Google Patents

Production of oleum

Info

Publication number
GB747785A
GB747785A GB1133/54A GB113354A GB747785A GB 747785 A GB747785 A GB 747785A GB 1133/54 A GB1133/54 A GB 1133/54A GB 113354 A GB113354 A GB 113354A GB 747785 A GB747785 A GB 747785A
Authority
GB
United Kingdom
Prior art keywords
oleum
sulphur trioxide
gas
absorber
concentration
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
GB1133/54A
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.)
Bayer AG
Original Assignee
Bayer 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 Bayer AG filed Critical Bayer AG
Publication of GB747785A publication Critical patent/GB747785A/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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Gas Separation By Absorption (AREA)

Abstract

Oleum of high concentration, e.g. 65 per cent, is produced from gases containing a relatively low concentration of sulphur trioxide, e.g. contact gases, by contacting a solution of oleum of relatively low concentration in a primary absorber with hot sulphur trioxide-containing gas in counter current flow, withdrawing a portion of the gas from the absorber near the gas inlet thereof, the conditions being such that said withdrawn gas contains an increased sulphur trioxide content, and absorbing the withdrawn gas in a solution of oleum of relatively high concentration in a secondary absorber so as to further increase the concentration of this oleum. The gas issuing from the secondary absorber may be led back into the primary absorber towards the gas outlet end thereof to recover further quantities of sulphur trioxide. Contact gases at 230-250 DEG C. and containing 7 per cent of sulphur trioxide and 27.5 per cent oleum, at a temperature at which the vapour pressure corresponds to the partial pressure of sulphur trioxide in gases containing about 3 per cent of sulphur trioxide, may be used in the primary absorber. Oleum of 65 per cent concentration may be used in the secondary absorber and recycled, after adding water to maintain said concentration and bleeding off the excess solution formed.
GB1133/54A 1953-01-14 1954-01-14 Production of oleum Expired GB747785A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE747785X 1953-01-14

Publications (1)

Publication Number Publication Date
GB747785A true GB747785A (en) 1956-04-11

Family

ID=6648703

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1133/54A Expired GB747785A (en) 1953-01-14 1954-01-14 Production of oleum

Country Status (1)

Country Link
GB (1) GB747785A (en)

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