GB589662A - Improvements in or relating to the production of sulphamic acid - Google Patents

Improvements in or relating to the production of sulphamic acid

Info

Publication number
GB589662A
GB589662A GB2231844A GB2231844A GB589662A GB 589662 A GB589662 A GB 589662A GB 2231844 A GB2231844 A GB 2231844A GB 2231844 A GB2231844 A GB 2231844A GB 589662 A GB589662 A GB 589662A
Authority
GB
United Kingdom
Prior art keywords
reaction
sulphamic acid
reactants
cooling
mixer
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
GB2231844A
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
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 EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Priority to GB2231844A priority Critical patent/GB589662A/en
Publication of GB589662A publication Critical patent/GB589662A/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
    • C01B21/087—Compounds containing nitrogen and non-metals and optionally metals containing one or more hydrogen atoms
    • C01B21/093—Compounds containing nitrogen and non-metals and optionally metals containing one or more hydrogen atoms containing also one or more sulfur atoms
    • C01B21/0935—Imidodisulfonic acid; Nitrilotrisulfonic acid; Salts thereof
    • 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
    • C01B21/087—Compounds containing nitrogen and non-metals and optionally metals containing one or more hydrogen atoms
    • C01B21/093—Compounds containing nitrogen and non-metals and optionally metals containing one or more hydrogen atoms containing also one or more sulfur atoms
    • C01B21/096—Amidosulfonic acid; Salts thereof

Landscapes

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

Abstract

A process for the manufacture of sulphamic acid from urea, sulphuric acid and sulphur trioxide comprises effecting the reaction between the reactants under conditions such that no substantial continuous body of liquid is present and while the reaction mixture is in film contact with a temperature controlled surface, e.g., one or more revolving drums, hollow rollers, or endless belts. The reactants may be (a) added to grinding zones of high speed grinding mills wherein the grinding faces are supplied with cooling means, (b) coated on separate revolving drums provided with cooling means, the reaction being effected at their line of contact, and the material being scraped off being, if required, further mixed with cooling, (c) premixed with adequate cooling and fed into the line of apposition of two revolving drums, or (d) added to a temperature-controlled mass of finely divided solid, e.g., dry pulverulent sulphamic acid crystals or unreacted urea crystals, which may also be used as diluents. The reactants are employed in substantially stoichiometric proportions and the reaction is effected between 150 DEG and 250 DEG F. Specification 576,739 is referred to. The Provisional Specification describes temperature control by the use of internally cooled mixer arms or water-jacketed walls of a mixer. or by causing the liquid components to film over or to be otherwise dispersed upon the surface of a suitably temperature controlled solid in which case a dough or ribbon type mixer may be used. Reference is also made to the conversion of sulphamic acid to its salts, e.g., ammonium sulphamate.
GB2231844A 1944-11-13 1944-11-13 Improvements in or relating to the production of sulphamic acid Expired GB589662A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2231844A GB589662A (en) 1944-11-13 1944-11-13 Improvements in or relating to the production of sulphamic acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2231844A GB589662A (en) 1944-11-13 1944-11-13 Improvements in or relating to the production of sulphamic acid

Publications (1)

Publication Number Publication Date
GB589662A true GB589662A (en) 1947-06-26

Family

ID=10177446

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2231844A Expired GB589662A (en) 1944-11-13 1944-11-13 Improvements in or relating to the production of sulphamic acid

Country Status (1)

Country Link
GB (1) GB589662A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2851336A (en) * 1955-09-26 1958-09-09 Du Pont Two-stage process for sulfamic acid manufacture
US2880064A (en) * 1955-09-26 1959-03-31 Du Pont Process for manufacture of sulfamic acid
CN113401883A (en) * 2021-07-12 2021-09-17 田雨 Continuous reaction process and continuous reaction equipment for sulfamic acid

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2851336A (en) * 1955-09-26 1958-09-09 Du Pont Two-stage process for sulfamic acid manufacture
US2880064A (en) * 1955-09-26 1959-03-31 Du Pont Process for manufacture of sulfamic acid
CN113401883A (en) * 2021-07-12 2021-09-17 田雨 Continuous reaction process and continuous reaction equipment for sulfamic acid

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