Abstract:
La présente invention concerne des perfectionnements aux machines pour le travail mécanique en continu des peaux. La machine dotée des perfectionnements selon l'invention se caractérise essentiellement en ce que les cylindres supérieurs (7A) et inférieurs (7B) et le rouleau de soutien (12) supportant la bande sans fin (6) sont montés sur un même châssis (13) mobile en translation par rapport aux outils (2) et à ou aux rouleaux de pression (11) et en ce que le rouleau de soutien (12) est mobile en translation relativement au dit châssis commun (13) aux cylindres supérieurs (7A) et inférieurs (7B).
Abstract:
Verfahren zur Herstellung von optisch aktivem 4-(1-Ammoniumethyl)- benzoesäuremethylester-sulfat durch Umsetzen von racemischem 4-(1- Aminoethyl)-benzoesäuremethylester mit einem Acylierungsmittel in Gegenwart einer Lipase zu 4-(1-Aminoethyl)benzoesäuremethylester und anschliessendem Ausfällen von 4-(1-Ammoniumethyl)benzoesäuremethylester-sulfat durch Zugabe von Schwefelsäure.
Abstract:
Magnesium low base number (LBN) sulphonates derived from high molecular weight sulphonic acids have low viscosity and are chloride free. The magnesium low base number sulphonates are not skin sensitisers. In their preparation neutralisation of high molecular weight sulphonic acids or partially neutralised soaps of high molecular weight sulphonic acids is completed by the use of a high base number sulphonate in conjunction with a carboxylic acid. The process does not require the use of chloride containing promoters and produces low chloride products.
Abstract:
The invention is characterised in that it comprises at least one working head 1 carrying at least one tool 2 for mechanical treatment of skins, a means 3 for supporting the skins to be treated and at least one means 4 for driving the said support and the said skin under the working head or heads 1 and by means for producing a relative separation of the skin support in relation to the said working head(s) and to the driving means 4.
Abstract:
Verfahren zur Herstellung eines N-(1-Aryl-alk-1-enyl)-acetamids oder N-(1-Heteroaryl- alk-1-enyl)-acetamids, wobei man ein N-(AIk-I -enyl)-acetamid mit einem Aryl- oder Heteroaryl-chlorid, bromid, iodid oder triflat in Gegenwart a) eines Pd-Katalysators und b) Wasser und/oder einer ionischen Flüssigkeit, und c) Dimethylformamid (DMF), N,N-Dimethylacetamid (DMAC) und/oder überschüssigem N-(Alk-1-enyl)-acetamid umsetzt.
Abstract:
To improve colour and odour characteristics of sulfonic acids and their derivatives while maintaining sludge and sulfuric acid reduction and good thermal stability, they are treated with at least one unsaturated hydrocarbon, each having at most 36 carbon atoms and having defined substitution characteristics.