PL3076B1

PL3076B1 - Method of obtaining salts of organic acids.

Info

Publication number: PL3076B1
Application number: PL3076A
Authority: PL
Filing date: 1920-09-09
Publication date: 1925-11-30

Description

Wiadomo, ze zmydlanie estrów odby¬ wa sie zazwyczaj zapomoca tlenków lub wodorotlenków metali alkalicznych lub me¬ tali ziem alkalicznych.Wynalazek polega na tern, ze zmydla¬ nie estrów, w szczególnosci octanu etylo¬ wego, odbywa sie metoda nawet odpowied¬ nia przy wytwarzaniu fabrycznem, o ile zamiast wyzej wspomnianych tlenków u- zyje sie niektóre tlenki metaliczne naprzy- klad PbO, który, odgrywajac role pier¬ wiastka kwasnego (np. olowianu sodu), w danym wypadku zastapi alkalja.Zmydlanie octanu etylowego tlenkiem olowiu jest tanie, szybkie i calkowite. Two¬ rzy sie octan olowiu i wydziela sie alkohol etylowy, nadajacy sie do powtórnego u- zytku.Mozna uzyc do reakcji tlenek olowiu, pochodzacy z olowiu alkalicznego lub tez tlenek, pochodzacy bezposrednio z mine¬ ralów.Zamiast octanu etylowego, otrzymane¬ go z wolnego kwasu octowego, mozna trak¬ towac kazdy inny ester, otrzymany z suro¬ wego kwasu drzewnego lub tez innych cie¬ czy, zawierajacych kwas octowy. Mozna tez zmydlac mrówczany, propioniany, bu- tyrany etylowe lub tez przygotowane w ten sam sposób estry homologów alkoholu etylowego.Reakcja odbywa;^sie bardzo prosto, Wystarczy lekko zagrzac mieszanine octa¬ nu etylowego, np/wody i tlenku olowiu, aby rozpoczac reakcje.Reakcja odbywa sie nastepnie samabez ogrzewania, nalezy nawet pod koniec operacji mase ostudzic. PLIt is known that the saponification of esters is usually carried out with oxides or hydroxides of alkali metals or alkaline earth metals. The invention is based on the fact that the saponification of esters, in particular ethyl acetate, is carried out by a method even suitable for the preparation of factory, if instead of the above-mentioned oxides, some metallic oxides, for example PbO, are used, which, while playing the role of an acid element (e.g. sodium lead), will replace the alkali in a given case. Saponification of ethyl acetate with lead oxide is cheap, fast and complete. Lead acetate is formed and ethyl alcohol is released, which can be reused. Lead oxide derived from alkaline lead or an oxide derived directly from minerals may be used for the reaction. Instead of ethyl acetate, obtained from free acetic acid, any other ester obtained from crude acetic acid or other acetic acid containing liquids can be treated. It is also possible to saponify formates, propionates, ethyl butyrates or esters of ethyl alcohol homologues prepared in the same way. The reaction is very simple. It is enough to slightly heat a mixture of ethyl acetate, e.g. water and lead oxide, to initiate the reaction. The reaction takes place only without heating, the mass should be cooled even at the end of the operation. PL

Claims

Patent claims. 1. A method of obtaining salts of organic acids, characterized by the fact that esters (for example acetates, formates, propionates, butyranes) of ethyl alcohol or its homologues are saponified by means of lead oxide, formed directly from lead minerals, or from oxidation metal lead.

2. Process for the preparation of lead acetate according to claim 2. The process of claim 1, wherein the use of lead oxide is saponified with ethyl acetate or any other ester obtained from the crude acid of wood vinegar or any other liquid containing acetic acid.

3. The method according to p. 1, characterized by the fact that the reaction is initiated by slightly heating the mass. Camus, Duchemin & Cie. Gaston Criaueboeuf. Deputy: S. Pawlikowski, patent attorney. Print by L. Boguslawski, Warsaw. PL