GB756871A - Improvements in or relating to the manufacture of urea - Google Patents

Improvements in or relating to the manufacture of urea

Info

Publication number
GB756871A
GB756871A GB28311/53A GB2831153A GB756871A GB 756871 A GB756871 A GB 756871A GB 28311/53 A GB28311/53 A GB 28311/53A GB 2831153 A GB2831153 A GB 2831153A GB 756871 A GB756871 A GB 756871A
Authority
GB
United Kingdom
Prior art keywords
copper
alloys
urea
registered trade
under
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
GB28311/53A
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.)
Chemical Construction Corp
Original Assignee
Chemical Construction Corp
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 Chemical Construction Corp filed Critical Chemical Construction Corp
Publication of GB756871A publication Critical patent/GB756871A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C273/00—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups
    • C07C273/02—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups of urea, its salts, complexes or addition compounds
    • C07C273/04—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups of urea, its salts, complexes or addition compounds from carbon dioxide and ammonia
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/141—Feedstock

Landscapes

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

Abstract

Urea is synthesized by reacting carbon dioxide and ammonia at elevated temperature and pressure under substantially oxygen-free conditions, characterized in that the reaction is carried out in a vessel lined with copper or a copper alloy in which the copper content is at least 80 per cent. Suitable copper alloys are alumibrass, phosphor bronze, alblack, AR, cupronickel and "Everdur" (Registered Trade Mark). Data is given showing the corrosion rate of copper and various alloys under urea synthesis conditions wherein the ratio of ammonia/carbon dioxide is 4:1 at a temperature of 175 DEG C. and a pressure of 180 atm., both in the absence of, and in the presence of, oxygen. High-nickel content alloys such as "Monel" metals, "Inconel" (Registered Trade Marks) and duranickel, tested under the same conditions, also give good results when compared with lead.ALSO:A vessel lined with copper or a copper alloy in which the copper content is at least 80 per cent is used for the synthesis of urea by reacting carbon dioxide and ammonia at elevated temperature and pressure under substantially oxygen-free conditions. Suitable copper alloys are alumibrass, phosphor bronze, alblack, AR, cupronickel and "Everdur" (Registered Trade Mark). The corrosion rate of highcopper alloys is compared to that of lead under urea synthesis conditions. Highnickel alloys such as "Monel" metals, "Inconel" (Registered Trade Marks), and duranickel also give good results under the same conditions.
GB28311/53A 1952-10-25 1953-10-14 Improvements in or relating to the manufacture of urea Expired GB756871A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP756871X 1952-10-25

Publications (1)

Publication Number Publication Date
GB756871A true GB756871A (en) 1956-09-12

Family

ID=13583340

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28311/53A Expired GB756871A (en) 1952-10-25 1953-10-14 Improvements in or relating to the manufacture of urea

Country Status (3)

Country Link
DE (1) DE1034617B (en)
FR (1) FR1090186A (en)
GB (1) GB756871A (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE301751C (en) *
DE390848C (en) * 1900-01-01
DE547081C (en) * 1929-03-02 1932-03-22 I G Farbenindustrie Akt Ges Process for the production of urea from carbonic acid and ammonia
BE491319A (en) * 1946-11-15 1900-01-01

Also Published As

Publication number Publication date
DE1034617B (en) 1958-07-24
FR1090186A (en) 1955-03-28

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