DD150064A1 - PROCESS FOR PREPARING POLYGLYCEROLPOLYRICINE OIL FATTY ACID ESTERS - Google Patents

Abstract

The invention relates to a process for the preparation of the emulsifier in the food industry serving Polyglycerolpolyrizinusoelfettsaeureester. The aim and object of the invention are to carry out the condensation of ricinoleic or Rizinusoelfettsaeure to Polyrizinusoelfettsaeure and the subsequent esterification of Polyrizinusoelfettsaeure with Polyglycerol to Polyglycerolpolyrizinusoelfettsaeureester in a shorter time by suitable catalysts to save energy and at the same time to achieve a higher quality. According to the invention, Lewis acids are used as catalyst in the condensation and the subsequent esterification, whereby the catalysts contained in the polyisocyanuric fatty acid in the esterification are in turn subjected to esterification and the catalytic influence of the catalysts present is sufficient. The Lewis acids used are preferably compounds of aluminum, iron trichloride and / or iron (III) acetate.

Description

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Title of the invention

"Process for the preparation of polyglycerol polyricin oil fatty acid esters"

Field of application of the invention

The invention relates to a process for the preparation of serving as an emulsifier in the food industry poly glycerol poly castor oil et c ester.

Characteristic of the known technical solutions:

The known solutions of the process describe the autocatalytic condensation of ricinoleic acid or castor oil fatty acids and the alkaline-catalyzed reaction of the condensed ricinoleic acid or castor oil fatty acids with polyglycerol to Polyglycerolpolyrizinusölfettsäureester. The known methods have the disadvantage that they require quite long reaction times and thus cause high expenses and energy costs. Due to the long reaction times also the end product is qualitatively adversely affected.

Object of the invention

The object of the invention is the condensation of ricinoleic acid or castor oil fatty acids to polyricin oil fatty acid and the catalyzed reaction of polyricin castor oil fatty acid with polyglycerol to give polyglycerol

To carry out polyculture oil esters in a shorter time, to save energy and at the same time to achieve a higher quality.

Explanation of the essence of the invention

Following this objective, it is the object of the invention to provide a process for the preparation of Polyglycerolpolyrizinu3Ölfettsäureester, which runs in a shorter time, reduces energy consumption and at the same time improves the quality of Polyglycerolpolyrizinusölfettsäureester.

The reactions proposed according to the invention consist of the stages of the Lewis acid-catalysed condensation of ricinoleic acid or castor oil fatty acids with polycrystalline fatty acid at a catalyst fraction of 0.05 % -0.5 ^C .O and the subsequent Lewis acid catalytic esterification of polyricin oil fatty acid with polyglycerol to polyglycerol polyricin fatty acid ester, wherein in turn the catalyst contained in the condensation in the polyricinic fatty acid is allowed to act as a catalyst in the esterification.

It has been found that the catalytic effect of the ία polyrisinus oil containing the catalyst is sufficient for the esterification and additional addition of a catalyst no longer leads to a significant reduction in the reaction time in the esterification and / or a significant improvement in the quality.

The process steps condensation and esterification are carried out at temperatures between 180 ⁰ C - 230 ⁰ G, most advantageously between 200 ⁰ C - 210 ⁰ C, and a pressure of less than 6 kPa (= 45 Torr) or a pressure of greater than 6 IcPa (= 60 Torr) under inert gas,

most advantageously less than 6 кРа. The reaction time, depending on the reaction temperature and the proportion of catalyst, in the process step condensation is 120-420 minutes, preferably 240 minutes and in the process step esterification 120-180 minutes, preferably 150 minutes.

Ausfiihrungsbeispiele

example 1

A fatty acid mixture obtained by cleavage of castor oil is treated with a Lewissaure, z. B. 0.1% aluminum as acetate, heated to about 205 g under reduced pressure for 4 hours, during which time the acid number of about 175 is lowered to a value less than 35. The condensation product is obtained with polyglycerol in the ratio 10: 1 at 205 ⁰ C and reduced pressure less than 8 kPa esterified for 2 hours. The catalyst acts from the fatty acid condensation. The final acid number is less than 5, preferably less than 3.

Example 2

A obtained in the same manner as in Example 1, the fatty acid mixture is at 100.1 kPa (760 Torr) under, inert gas, preferably nitrogen, at 200 C for 6 hours with the addition of a Lewis acid, eg. 3. 0.1 ^C ₄ O condensed. The acid number decreases during the

The condensation product thus produced is esterified at 200 C, 100.1 kPa (760 Torr) and inert gas, preferably nitrogen, for 150 minutes. The acid number of the ester is at least less than 5, preferably less than 3. The catalytic effect of the catalyst contained in the condensed fatty acid is sufficient for the esterification, so that no further addition is required.

Claims (7)

invention claims 1 · A process for the preparation of Polyglycerolpolyrizinusölfettsäureester by catalytic condensation of ricinoleic acid or castor oil fatty acids to polyricin and subsequent catalytic esterification of Polyrizinusölfettsäure with polyglycerol to Polyglycerolpolyrizinusb'lfettsäureester characterized in that are used in the condensation and esterification Lewis acids as a catalyst. 2. The method according to item 1, characterized in that 0.05 to 0.5 % of Lewis acids are used as a catalyst in the condensation. 3 * Method according to item 1 and 2, characterized in that the Lewis acids contained in the condensation product from the condensation act as a catalyst in the esterification. 4 · Process according to items 1 to 3 », characterized in that the catalyst used are compounds of aluminum with a catalytically active proportion of aluminum of 0.01-0.5 %, based on the reaction mixture. 5 · Process according to item 1 to 3, characterized in that iron trichloride and / or iron (III) acetate having a catalytically active iron content of 0.01-0.5 / 5, based on the reaction mixture, is used as catalyst » 6 * Process according to items 1 to 3 », characterized in that the catalyst used is Y.sub.a orceride ions in the form of 0.01-1.0 % of mineral and / or organic acids, based on the reaction mixture. 7. The method according to item 1 to 6, characterized in that the condensation and esterification at temperatures of 180 ⁰ C to 230 ⁰ C, preferably 200 oG to 210 ⁰ C, a pressure of less than or more than kPa under shielding gas, preferably smaller б kPa, and the condensation is carried out at a residence time of 120 to 420 minutes, preferably 240 minutes and the esterification at a residence time of 120 to 180 minutes, preferably 150 minutes.