SU442822A1 - The method of preparation of the catalyst for the hydrogenation of liquid acids - Google Patents

Description

one

The invention relates to the manufacture of catalysts for hydrogenation.

A known method of preparing a catalyst for the hydrogenation of liquid acids by reducing the carbonates of Cu and Ni with hydrogen in an environment of fatty acids. However, this method does not allow to obtain a catalyst with a sufficiently high activity and stability and complicates the hydrogenation technology.

To increase the activity and stability of the nickel-copper catalyst, nickel and copper carbonates are proposed to be preliminarily reduced in an environment of saturated triglycerides with an iodine number from 0 to 10.

When implementing the method, after reducing the catalyst in saturated triglycerides, it is metered as a highly concentrated suspension into the reactor for the hydrogenation of fatty acids, where it is re-reduced.

Using this method allows saturation of fatty acids at 180-240 ° С with high activity, reduced catalyst consumption and low content of soaps in hydrogenation products.

A commercially dispersed nickel-copper catalyst prepared by preliminary reduction of catalyst salts in a saturated triglyceride with an iodine number O-10 was subjected to testing.

Distilled fatty acids from cotton stock soap stock with an iodine number of 103% 12 were subjected to hydrogenation; acid number 199.1 mg KOH; the number of saponification is 203.0 mg KOH; titer of 33.5 ° C.

Example 1. In a laboratory autoclave, nickel and copper carbonates are reduced (content, 1%, 9%) in an environment of saturated fat.

Take 50 ml of hydrogenated cottonseed oil (melting point 61.0 ° C, i.h. 2.9% la; for example, 0.6 mg KOH) and 20 g of N1 and Si carbonates. The carbonate salt of Ni and Cu is reduced at 220–235 ° C and a hydrogen transmission rate of 3 l / min for 1 hour. Then in the presence of the obtained catalyst in an amount of 0.15% met. N1 to fat weight hydrogenates 50 ml of distilled fatty acids under standard conditions. The resulting hydrogenate has a melting point of 58 ° C; the acid number is 198.5 mg KOH; iodine number 13.9% 122; traces of Ni.Mbi.i.

Example 2. In a laboratory autoclave, hydrogenation of 50 ml of distilled soap stocks fatty acids with 0.2 g of nickel and copper carbonates was carried out under standard conditions.

The resulting hydrogenate has; temperature 34

melting point 46 ° C; acid number 180.1 mg

KOH; NiMbi.i. 2500 mg / kg; iodine number A catalyst preparation method for

58.9% of hydrogenation of fatty acids by reduction. Thus, the catalyst prepared by hydrogen nickel and copper carbonates,

with the preliminary reduction of 5 and with the fact that, in order to improve the catalytic salts in the saturated trigly the catalyst’s activity and stability,

a ceride with an iodine number of 0-10, allows for the carbonates of nickel and copper to be preliminarily radiated to standard technical salomas. They are set in an environment of saturated triglyce 442822

Readov with iodine number from O to 10.