GB1185980A - Process for preparing nitrilotriacetic acid - Google Patents

Process for preparing nitrilotriacetic acid

Info

Publication number
GB1185980A
GB1185980A GB1270269A GB1270269A GB1185980A GB 1185980 A GB1185980 A GB 1185980A GB 1270269 A GB1270269 A GB 1270269A GB 1270269 A GB1270269 A GB 1270269A GB 1185980 A GB1185980 A GB 1185980A
Authority
GB
United Kingdom
Prior art keywords
nitrilotriacetic acid
april
preparing
iminodiacetonitrile
added
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
GB1270269A
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.)
Cowles Chemical Co
Original Assignee
Cowles Chemical 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 Cowles Chemical Co filed Critical Cowles Chemical Co
Publication of GB1185980A publication Critical patent/GB1185980A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C255/00—Carboxylic acid nitriles

Landscapes

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

Abstract

1,185,980. Preparation of nitrilotriacetic acid. COWLES CHEMICAL CO. 26 April, 1967 [26 April, 1966; 14 April, 1967], No. 12702/69. Divided out of 1,185,092. Heading C2C. Nitrilotriacetic acid is prepared by reacting methylene bis-iminodiacetonitrile with formaldehyde and an alkali metal cyanide under alkaline conditions. In an example, methylene bis-iminodiacetonitrile is added to a hot alkaline solution containing excess NaCN and then formaldehyde solution is added.
GB1270269A 1966-04-26 1967-04-26 Process for preparing nitrilotriacetic acid Expired GB1185980A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US54543566A 1966-04-26 1966-04-26
US63087567A 1967-04-14 1967-04-14

Publications (1)

Publication Number Publication Date
GB1185980A true GB1185980A (en) 1970-04-02

Family

ID=27067937

Family Applications (3)

Application Number Title Priority Date Filing Date
GB1270369A Expired GB1185818A (en) 1966-04-26 1967-04-26 Process for Preparing Nitrilotriacetonitrile
GB1925667A Expired GB1185092A (en) 1966-04-26 1967-04-26 Process for Preparing Methylenebisimino Diacetonitrile
GB1270269A Expired GB1185980A (en) 1966-04-26 1967-04-26 Process for preparing nitrilotriacetic acid

Family Applications Before (2)

Application Number Title Priority Date Filing Date
GB1270369A Expired GB1185818A (en) 1966-04-26 1967-04-26 Process for Preparing Nitrilotriacetonitrile
GB1925667A Expired GB1185092A (en) 1966-04-26 1967-04-26 Process for Preparing Methylenebisimino Diacetonitrile

Country Status (6)

Country Link
BE (1) BE697624A (en)
CH (2) CH504410A (en)
DE (1) DE1593793A1 (en)
GB (3) GB1185818A (en)
NL (1) NL6705717A (en)
SE (3) SE346991B (en)

Also Published As

Publication number Publication date
CH504410A (en) 1971-03-15
CH522597A (en) 1972-05-15
NL6705717A (en) 1967-10-27
BE697624A (en) 1967-10-26
SE364262B (en) 1974-02-18
SE346991B (en) 1972-07-24
SE364951B (en) 1974-03-11
GB1185818A (en) 1970-03-25
GB1185092A (en) 1970-03-18
DE1593793A1 (en) 1970-12-10

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Legal Events

Date Code Title Description
414F Notice of opposition given (sect. 14/1949)
414B Case decided by the comptroller ** grants allowed (sect. 14/1949)
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees