GB299487A - Improvement in the manufacture of dimethylol urea - Google Patents

Improvement in the manufacture of dimethylol urea

Info

Publication number
GB299487A
GB299487A GB1678327A GB1678327A GB299487A GB 299487 A GB299487 A GB 299487A GB 1678327 A GB1678327 A GB 1678327A GB 1678327 A GB1678327 A GB 1678327A GB 299487 A GB299487 A GB 299487A
Authority
GB
United Kingdom
Prior art keywords
urea
formaldehyde
dimethylol urea
concentration
baly
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
GB1678327A
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.)
POLLOPAS Ltd
Original Assignee
POLLOPAS Ltd
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 POLLOPAS Ltd filed Critical POLLOPAS Ltd
Priority to GB1678327A priority Critical patent/GB299487A/en
Publication of GB299487A publication Critical patent/GB299487A/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
    • C07C273/18—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 substituted ureas
    • C07C273/1854—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 substituted ureas by reactions not involving the formation of the N-C(O)-N- moiety
    • C07C273/1863—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 substituted ureas by reactions not involving the formation of the N-C(O)-N- moiety from urea

Landscapes

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

Abstract

299,487. Pollopas, Ltd., Baly, E. C. C., and Baly, E. J. June 24, 1927. Dimethylol urea.-Dimethylol urea is made by condensing urea with formaldehyde (preferably with a small excess of formaldehyde) in cold aqueous solution having a faintly alkaline reaction. The alkali concentration should not exceed that corresponding to 0.02 N caustic soda, since if that concentration is exceeded heat is evolved to such a degree that undesirable byproducts are formed. Alkaline buffer solutions mav be used to maintain the desired concentration. In an example, a mixture of urea with formaldehyde in 10 per cent excess, to which sufficient caustic soda has been added to give an alkalinity of 0.01 N, is stirred for 24 hours at 15-20‹ C. The product melts above 134‹ C., usually at 138-140‹ C. Specification 213,567 is referred to.
GB1678327A 1927-06-24 1927-06-24 Improvement in the manufacture of dimethylol urea Expired GB299487A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1678327A GB299487A (en) 1927-06-24 1927-06-24 Improvement in the manufacture of dimethylol urea

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1678327A GB299487A (en) 1927-06-24 1927-06-24 Improvement in the manufacture of dimethylol urea

Publications (1)

Publication Number Publication Date
GB299487A true GB299487A (en) 1928-10-24

Family

ID=10083576

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1678327A Expired GB299487A (en) 1927-06-24 1927-06-24 Improvement in the manufacture of dimethylol urea

Country Status (1)

Country Link
GB (1) GB299487A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103242201A (en) * 2013-04-26 2013-08-14 中科院广州化学有限公司 Preparation method of urea formaldehyde intermediate dimethylol urea

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103242201A (en) * 2013-04-26 2013-08-14 中科院广州化学有限公司 Preparation method of urea formaldehyde intermediate dimethylol urea
CN103242201B (en) * 2013-04-26 2015-06-10 中科院广州化学有限公司 Preparation method of urea formaldehyde intermediate dimethylol urea

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