SU427728A1 - - Google Patents

Description

(54) CATALYST FOR DECARBOXYLATION OF FATY

ACID

one

The invention relates to the manufacture of catalysts used in industry for the production of ketones.

A catalyst for the decarboxylation of fatty acids (natural and synthetic) based on manganese oxide is known.

However, the known catalyst has insufficiently high activity and selectivity in the process of decarboxylation of fatty acids.

The increase in the activity and selectivity of the catalyst is ensured by the fact that the catalyst soda, stainless (wt.%) Manganese oxide is from 1.0 to 10.0, potassium manganate from 2.0 to 20.0 and active alumina from 71, 0 to 97.0.

The proposed catalyst allows for the acceleration of the fatty acid ketonization reaction.

Decarboxylation of synthetic fatty acids takes place at a higher volumetric rate (0.3 -; - 0.8 l / l of catalyst / hour) and in milder temperature conditions (370 ° C) on the proposed catalyst. The degree of conversion of acids to ketones reaches 99.6%.

The yield of fatty ketones is high and ranges from 74-75%. The theoretical yield of ketones is 75.4%.

Example 1. Ketones are obtained by passing vapors of synthetic fatty acids.

SB-Ce fractions (acid number 446 mg con / g) in a flow system through a reactor filled with a lump catalyst containing MpOg: K2Mn04: 7 A12Oz in a ratio of 1.0: 2.26: 7.6 in a stream of carbon dioxide at an overpressure 20-40 mm Hg. Art.

The results of the ketonization of FLC SB-Ce are given in table 1.

Chromatographic composition of ketones obtained by the ketonization of synthetic fatty

acids Cs-Sat, the following:

Source acids,%

Ketones,%

Sz -1,0

C5--0,4

Sc-8, 6

C - 6,

GIJQ-1, 2

5.0

C5-15,7

-3.0 C- -2.0

§ ;: Се - 3.8

Co-24.3

1.7

C, -25.2 Co-9.3

Cis

-0,8

Cg -18.0

with „Xu -15.9

0.4

C, -5.0 C-17.1

S-ao

0.16 C, o-4.2 C, g -17.0 Cai-0, 04 Cu-0.5 C, g-13.6

25 For comparison, the results of decarboxylation of C3-Sb synthetic fatty acids (acid number 446 mg KOH / g) on an MpO catalyst are given.

Subject invention

A catalyst for the decarboxylation of fatty acids based on manganese oxide, characterized in that, in order to

Table 1

table 2

activity and selectivity of the catalyst, it contains (wt.%) manganese oxide - from 1.0 to 10.0, potassium manganate - from 2.0 to 20.0 and active alumina - from 71.0 to 97.0.