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
GB15879/40A
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.)
Wyeth Holdings LLC
Original Assignee
American Cyanamid 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 American Cyanamid CofiledCriticalAmerican Cyanamid Co
Publication of GB543600ApublicationCriticalpatent/GB543600A/en
C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
C07C45/78—Separation; Purification; Stabilisation; Use of additives
C07C45/86—Use of additives, e.g. for stabilisation
Landscapes
Chemical & Material Sciences
(AREA)
Organic Chemistry
(AREA)
Phenolic Resins Or Amino Resins
(AREA)
Abstract
543,600. Formaldehyde. AMERICAN CYANAMID CO. Oct. 30, 1940, No. 15879. Convention date, Nov. 28, 1939. [Class 2 (iii)] Aqueous formaldehyde, especially in concentrated form, is stabilized by adding melamine or an alkylol melamine such as hexamethylol melamine which may be prepared by condensing melamine with formaldehyde in neutral or slightly alkaline solution. Tables are given to show the stabilizing effect of various proportions of melamine and of hexamethylol melamine on various concentrations of formaldehyde.
GB15879/40A1939-11-281940-10-30Improvements in or relating to methods of stabilizing formaldehyde solutions
ExpiredGB543600A
(en)
Procedure for the obtaining of phosphoric acid based on aqueous solutions containing nitric acid and phosphoric acid. (Machine-translation by Google Translate, not legally binding)