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procédé de séparation et de purification de l'acide parahydroxybenzoique.
process for the separation and purification of p-hydroxy-benzoic acid.
Last Update: 2014-11-25
Usage Frequency: 3
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nt1 acide parahydroxybenzoique nt1 acide propionique nt1 acide sorbique nt1 anhydride sulfureux agent de sapidité use exhausteur de gout agent de surface use
antioxidants uf alkylresorcinols sf preservation bti additives nt1 ascorbic acid nt1 ascorbyl palmitate nt1 bha nt1 bht nt1 butylhydroquinone nt1 erythorbic acid nt1 ethoxyquin nt1 gallates nt1 ndga nt1 tocopherols rt oxidation øtitftvpø øfføntø use biocides
Last Update: 2014-02-06
Usage Frequency: 1
Quality:
granule d'acide parahydroxybenzoique ou d'ester d'acide parahydroxybenzoique et son procede de production
granule of parahydroxybenzoic acid or parahydroxybenzoic ester and process for producing the same
Last Update: 2014-11-25
Usage Frequency: 3
Quality:
il s'agit d'esters de méthyle, éthyle, propyle et butyle d'acide parahydroxybenzoique en association avec de l'alcool phénoxyéthylique.
it consists of methyl, ethyl, propyl and butyl esters of para-hydroxybenzoic acid in combination with phenoxyethyl alcohol.
Last Update: 2014-12-03
Usage Frequency: 1
Quality:
en fin de réaction la masse réactionnelle est traitée afin d'en séparer les sels de potassium des acides hydroxybenzoïques et hydroxyphtaliques obtenus, en l'occurrence essentiellement le bisel et/ou le monosel potassique de l'acide parahydroxybenzoique et dans des proportions nettement moindres le salicylate de potassium et l'hydroxy-4 isophtalate de potassium.
upon completion of the reaction, the reaction mass is treated in order to separate therefrom the potassium salts of hydroxybenzoic and hydroxyphthalic acids obtained, in this case principally dipotassium and/or the monopotassium salt of para-hydroxybenzoic acid and, in much smaller proportions, potassium salicylate and potassium 4-hydroxyisophthalate.
Last Update: 2014-12-03
Usage Frequency: 1
Quality: