C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
260/474
C07C 69/84 (2006.01) C07C 67/00 (2006.01) C07C 67/48 (2006.01) C07C 69/88 (2006.01)
Patent
CA 1140572
ABSTRACT OF THE DISCLOSURE Alkali metal salts of hydroxybenzoates are claimed which are substantially anhydrous and free from hydrobenzoic acid and have the formula Image in which R1 denotes alkyl, alkenyl, cycloalkyl or aralkyl, R2 and R3 are identical or different and represent hydrogen, halogen, hydroxyl, amino, alkylamino, alkyl, alkoxy, aralkyl or aryl and Me denotes an alkali metal. Furthermore a process for the preparation of the said alkali metal salts of hydroxybenzoates, which are substantially anhydrous and free from hydrobenzoic acid, characterized in that a solution or suspension of a hydroxybenzoate of the formula Image in which R1, R2 and R3 have the abovementioned meaning, is neutralized with an alkali metal hydroxide at -10 to +50°C until the degree of neutralization is 0,95 to 1,05, a degree of neutralization of 1,00 denoting the Le a 19 901 end point of the neutralization of the phenolic OH group by the alkali metal hydroxide, and the resulting solution or suspension of the allkali metal salt of the hydroxybenzoate is passed to a mild drying operation which does not damage the product and is in itself known, after a time auch that the content of hydroxybenzoic acid or the alkali metl salt thereof in this solution or suspension does not reach the value of 1 % by weight, relative to the amount of alkali metal salt of hydrobenzoate contained in this solution or suspension. Le A 19 501
336560
Rapp Walter
Schnegg Peter
Vosteen Bernhard
Aktiengesellschaft Bayer
Fetherstonhaugh & Co.
LandOfFree
Alkali metal salts of hydroxybenzoates, which are... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Alkali metal salts of hydroxybenzoates, which are..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Alkali metal salts of hydroxybenzoates, which are... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-263073