DE312668C - - Google Patents

Description

It is known that when unsaturated organic bodies are treated with hydrogen in the presence of finely divided, freshly reduced metals, an accumulation of Hydrogen can be achieved. For the In carrying out this process, there is an extraordinary difficulty in making the "catalyst"; H. in extraction of the finely divided metal in active Shape. For this purpose, special devices are required, yaw or to bring it into the finest distribution. In the processes known up to now in which finely divided metals are treated Unsaturated compounds were used, it was necessary either to make a constant intensive mechanical movement, to get a mixture of the metal and the liquid, or the latter on the surface of contact carriers, such as pumice stone, kieselguhr

g g

a high temperature in order to distribute a really active j, etc., whereby the re-ves Product to get very pure off; extraction and regeneration of the metal contaminants and G h B lid

a very pure gas is necessary. Even minor contamination of the Catalyst impair its effectiveness. ': ■' '

It has now been found that one can reduce or hydrogenate unsaturated organic fatty acids and their esters with

ao the help of the metal salts of organic acids is able to carry out Hydrogenization process is greatly simplified.

The difficulties of the hitherto known

The fifth method can be overcome by using the organic metal salts can be produced easily and cheaply without special equipment or can be purchased in pure form, a reductior in special apparatus and at high temperature is not necessary and Impurities in the reducing gas have no influence on the process.

Further, in cases where the body to be reduced is a liquid, it is easy to make it difficult to emulate with the organic metal salt used. In the present process, the body to be reduced is mixed with the organic metal salt or its solution, heated to a suitable temperature and either a stream of the reducing gas ^{1 is passed} through the mixture or the mixture is exposed to the gas atmosphere in a closed vessel can also support the contact between the gas and the mixture or the emulsion by mechanical means. Under these conditions, saturation occurs fairly quickly.

To carry out the process, the organic metal salts are expediently the formic acid, acetic acid, lactic acid salts, of copper, iron, nickel, cubalt, etc. used.

Example: 100 g of cotton seed oil are mixed with 1 to 5 g of nickel formate (in concentrated aqueous solution or in powder form), the mixture is heated and a stream of hydrogen is passed into the apparatus. The temperature is increased to 170 to 215 ^° . The D: itier of the treatment is

(2nd edition, issued August 7 , 1920J

depending on the amount of format used. You can do the reduction so far carry out until the unsaturated compounds are quantitatively converted into saturated ones

S are. Then nitrate

There are several ways to modify the process, e.g .: omulsify that ül with the organic metal salt under simultaneous heating and permeating of

ίο hydrogen in a suitable emulsion device, or you bring the oil mixed with the salt in finely divided form the hydrogen in contact. One can also speed up the reaction by that one uses the hydrogen under pressure or by impregnating the oil with ■ hydrogen and then with the brings organic metal salt into intimate contact.

ao It may be advisable to use the oil to a previous raffinate process (neutralization, decolorization, etc.). In special cases, one can use a

»Combine 5 simultaneous treatments with direct steam. . .

Claims (3)

Patent-to sayings: i. Process for the hydrogenation of unsaturated organic acids and their esters, in particular the unsaturated fatty acids and their esters, characterized in that that these bodies can be kept at a suitable temperature using metal salt organic acids, excluding the salts of metals of the platinum group, treated with reducing gases. 2. An embodiment of the method described under 1, characterized in that that one the unsaturated 40, organic acids and their esters with the organic salts (either in solution or in powder form) and emulsified treated at the same time or afterwards with reducing gases at the appropriate temperature. 3. An embodiment. the method described under 1, characterized in that that the bodies to be reduced are finely divided with the 5 » brings organic salts and the reducing gases into contact. Berlin, «printed in the rCichsdrvukcrki.