GB660413A - A method of preparing solid hydroxylamine sulphate - Google Patents

A method of preparing solid hydroxylamine sulphate

Info

Publication number
GB660413A
GB660413A GB1212749A GB1212749A GB660413A GB 660413 A GB660413 A GB 660413A GB 1212749 A GB1212749 A GB 1212749A GB 1212749 A GB1212749 A GB 1212749A GB 660413 A GB660413 A GB 660413A
Authority
GB
United Kingdom
Prior art keywords
sulphate
hydroxylamine
calcium
hydroxylamine sulphate
filtered
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
GB1212749A
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.)
Svit np
Original Assignee
Svit np
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 Svit np filed Critical Svit np
Publication of GB660413A publication Critical patent/GB660413A/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
    • C01B21/00—Nitrogen; Compounds thereof
    • C01B21/082—Compounds containing nitrogen and non-metals and optionally metals
    • C01B21/14—Hydroxylamine; Salts thereof
    • C01B21/1409—Preparation
    • C01B21/1427—Preparation by reduction of nitrogen oxides or nitrites with bisulfite or sulfur dioxide, e.g. by the Raschig process

Landscapes

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

Abstract

Solid hydroxylamine sulphate is prepared by subjecting a solution of the salt in dilute sulphuric acid, obtained by hydrolyzing hydroxylamine disulphonates of alkaline earth metals, to concentration and precipitating the hydroxylamine sulphate by adding a liquid which is miscible with sulphuric acid but which does not easily dissolve hydroxylamine sulphate e.g. aliphatic alcohols or dioxan. Solutions of calcium nitrate and calcium bisulphate are mixed with stirring at up to 10 DEG C and the mixture saturated with sulphur dioxide to pH.3.6. The solution of calcium hydroxylamine disulphonate formed is hydrolyzed by heating to 80 DEG C for 1 hour and the calcium sulphate precipitate is filtered off. The filtrate is concentrated in vacuo at 30 DEG -40 DEG C, and any further calcium sulphate precipitated is filtered off, then further concentrated at 40 DEG -60 DEG C. The concentrate is either treated directly with denatured alcohol to precipitate the hydroxylamine sulphate or subjected to preliminary cooling to crystallize some of the salt.
GB1212749A 1948-05-18 1949-05-06 A method of preparing solid hydroxylamine sulphate Expired GB660413A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS186948 1948-05-18

Publications (1)

Publication Number Publication Date
GB660413A true GB660413A (en) 1951-11-07

Family

ID=5354131

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1212749A Expired GB660413A (en) 1948-05-18 1949-05-06 A method of preparing solid hydroxylamine sulphate

Country Status (4)

Country Link
BE (1) BE488838A (en)
CH (1) CH276139A (en)
FR (1) FR985345A (en)
GB (1) GB660413A (en)

Also Published As

Publication number Publication date
FR985345A (en) 1951-07-17
CH276139A (en) 1951-06-30
BE488838A (en)

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