The method of obtaining the oxidized vegetable oils

 

(57) Abstract:

The invention relates to a method for producing an oxidized vegetable oils, which are used in paint, printing, light industry, binders in the construction industry and other sectors of the economy. The production of oxidized vegetable oils involves the oxidation semidrying oils with oxygen in the presence of biopolymeric phtalocyanine or melamine-formaldehyde complexes of metals of variable valence of Co, Mn, Ni, Fe deposited on a solid inert carriers, in the temperature range 130-160oWith purging air 40 h-1to achieve the viscosity 960-1340 C. Proposed method are the light of the oxidized oil when using recyclable heterogeneous catalysts for reuse. 6 table.

The invention relates to a method for producing an oxidized vegetable oils, which are used as film-forming paints and lacquers, printing, light industry, binders in the construction industry and other sectors of the economy [Grinberg A. I. Technology of film-forming substances. - L.: Goskomizdat, 1955, 651 S.].

Iza at a temperature of 150-160oIn the presence of catalysts (desiccant - linoleate manganese-lead or manganese-lead-cobalt), after purging the oxidized oil is supplied to the heat treatment without blowing air at a temperature 260-265oWith or 280oWith under vacuum.

The disadvantage of this method is the high temperature heat treatment and the high duration of the process that leads to the loss of vegetable oil during its oxidation, increase harmful emissions into the atmosphere, worsening the quality of oxidate (darkening), and the need to use lead driers [Grinberg A. I. Technology of film-forming substances. - L.: Goskomizdat, 1955, 651 S.].

A method of obtaining polymerized oils, comprising the following operations: blowing air at a temperature of 138oWith, then mixing at a temperature of 60oC with the addition of 0.4% diluted sulfuric acid, and upon reaching the desired viscosity neutralization with triethanolamine. The disadvantages of this method include a multi-stage process, the need for neutralization of sulfuric acid [U.S. Pat. USA 2838551. Polymerized vegetable oil and the way they are received / Kantor M, VI is no oxidation semidrying vegetable oils oxygen at a temperature of 130-150oIn the presence of aluminum-organic compounds (AOC): diethylaluminium (DEAH), triethylaluminium (tea), triisobutylaluminum (CHIBA) [RF patent 2162479 Way to obtain oxidized vegetable oils / Prikhodko, S. I. and others, 2001]. The disadvantage of this method is the necessity of using expensive initiators of the process.

The objective of the invention is to remedy these disadvantages: the process under mild conditions, the use of recyclable heterogeneous catalysts for reuse, eliminating mnogostadiinost process and, as a consequence, obtaining light oxidized oils.

This object is achieved by carrying out the oxidation semidrying vegetable oils oxygen (air flow 40 h-1) at a temperature of 130-160oIn the presence of heterogeneous catalysts: pyropolymer phthalocyanine complexes of metals of variable valence of Co, Mn, Ni, Fe or biopolymeric melamine-formaldehyde complexes of these metals deposited on solid media (aluminum oxide, aluminosilicates, zeolites, glass, glass ceramics, metal-ceramics). The method of producing catalyst is impregnated with an inert carrier Rast is termoobrabotki substances at 600-1000oC in an atmosphere of inert gas prior to the occurrence of cross-linked polymer systems. For example, the media-Al2O3with particle sizes of 1.0-1.5 mm was soaked with a solution of tetrachlorosilane cobalt with a concentration of 2 g/l within 24 hours, the Sample was dried at room temperature for 6 h and at 100oC for 3 hours Then a sample of the catalyst was subjected to heat treatment at 1000oWith in argon for 1 h, the Occurrence of cross-linked polymer system was controlled using IR spectroscopy [EN 93052319/04, B 12, 27.04.1996].

The use of these compounds allows you to:

1. avoid the use of expensive consumable toxic lead-cobalt-manganese driers,

2. avoid the use of expensive aluminum-organic catalysts,

3. get oxidized oil with low chromaticity, as the process is carried out in mild conditions, as well as in the present invention do not require the use of painted catalysts (siccatives),

4. to regenerate and reuse the oxidation catalyst, thereby to reduce the cost of production of oxidized oil.

The choice of temperature range is explained by the following: reduction rate is ikenaga oil; the temperature increases above 160oWith impractical because the inputs to the process are achieved far exceed the effects of the viscosity at the process temperature of equal to 180oWith is 1280 S.

The proposed method is confirmed by the following examples.

Example 4, PL.1.

In a metal reactor column type with the lower perforated plate (air distribution) and a stainless steel mesh (for holding grains of catalyst) is loaded catalyst - penopolimery phthalocyanine cobalt (Fcso) deposited on alumina-Al2O3with a particle size of 3-5 mm in the amount of 30% of the working volume of the reactor. Then the reactor is loaded pre-dehydrated sunflower oil to fill the reactor to 70% of its working volume. After the download is heating the reactor to 160oAnd begins the oxidation by air oxygen. The air flow rate is set to 40 cm3/cm3oil per hour (40 h-1). The monitoring process is carried out in viscosity of the oxidized oil on the OT-4. The reaction is finished when reaching a viscosity of 1200 C. the duration of the process while SOS is equal to 250.

After completion of the oxidation air supply is stopped, the oil through the nozzle bottom drain of the reactor into the receiving container for the finished product. Next, the reactor with the catalyst washed once with hot white spirit supplied through the fitting bottom drain, then blown technical nitrogen and then air. After washing, the catalyst can be reused at least 250 times.

The following examples of synthesis are given in the tables:

table. 1, 4 examples, confirming the influence of the conditions of the oxidation process on the properties of the obtained product;

table. 2, 5 examples, showing the influence of metal ion catalyst at the conditions of the oxidation process and properties of oxidized oil;

table. 3, 6 examples, confirming the impact of semidrying oils on the process conditions and properties of the obtained product;

Thus, the results indicate that the oxidation of vegetable oils oxygen (40-1) at a temperature of 130-160oC in the presence of pyropolymer phthalocyanine complexes of metals of variable valency and pyropolymer melamine-formaldehyde complexes of these metals are obtained light oxidized who ate oxygen, characterized in that the process is carried out in the presence of biopolymeric phtalocyanine or melamine-formaldehyde complexes of metals of variable valence of Co, Mn, Ni, Fe deposited on a solid inert carriers, in the temperature range 130-160oWith purging air 40 h-1to achieve the viscosity 960-1340 C.

 

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