A method of obtaining modified vegetable oils

 

(57) Abstract:

Use: manufacture of drying oils for oil paints. The inventive oxidized vegetable oil combine with furfural extract oil is a byproduct of selective treatment of petroleum oils with an initial boiling point not lower than 200C, taken in an amount of 3 to 30% by weight of the reaction mass. The process is carried out at a temperature of 20 to 120C With stirring for 20 - 30 minutes 3 table.

The invention relates to coatings industry and can be used for drying oils used in the manufacture of oil paints.

A method of obtaining a film-forming by heating a mixture of vegetable oil and the modifying agent with the simultaneous oxidation of a mixture of air at 130-140aboutC. as a modifying agent, a mixture of 40-75 wt.h. 10-40% of a solution in an organic solvent of high molecular weight synthetic isopropyl rubber mol.m. 150-300 thousand and 20-50 wt.h. diphenylpiperazine rubber and/or Polivanov.

The disadvantage of this method is the complexity of technology and the consumption of scarce and valuable products.

A method of obtaining plancoast low molecular weight rubbers used copolymers of butadiene with 40-60 wt.% piperylene, containing 50-60% of 1,4-TRANS units and 2-5% of oxygen-containing fragments.

The disadvantage of this method is the complexity of technology, the shortage and high cost of the products.

It is known that modified vegetable oil can be obtained by combining the oxidized vegetable oils (sunflower) and the modifying agent when heated to 240-280aboutAfter cooling the mixture to prepare a film-forming solution in a solvent (white spirit), centrifuged for 1 h to separate the impurities, the centrate add triple defenatly desiccant.

As the modifying agent used structured in the polymerization of low molecular weight rubber is selected from the group consisting of polybutadiene, polypopylene and butadiene copolymer, piperylene, taken in an amount of 5-50% by weight of the reaction mass. The disadvantages of this method are the high consumption of heat, because the process is conducted at high temperature (260-280aboutC) and the complexity of technology with the use of centrifuges.

The closest in technical essence to the present invention is a method of obtaining modified vegetable oils by combining oxidized vegetable by weight of the ESA is conducted by heating up to 50-120aboutC.

However, the block copolymers have a high price, they get the multistage synthesis: the alkylation of phenols, obtaining propylene oxide, oxypropylene, oxoethylidene, the selection of the target fraction. Block copolymers incompatible with oxidized vegetable oil at a temperature below the 50aboutC. During transportation of the necessary copolymers heated tanks, pipelines and pumps, that the conditions of production repowering plants existing plants is not feasible everywhere.

The aim of the invention is to intensify and lowering the process temperature, the expansion of the range of raw materials.

This goal is achieved due to the fact that the method of obtaining modified vegetable oils by combining oxidized vegetable oils with the modifying agent when heated, as the modifying agent used 3-30% by weight of the reaction mass furfuralcohol extract oil is a by-product of selective purification of petroleum oils and the process is carried out at a temperature of 20-120aboutWith stirring for 20-30 minutes

To obtain the modified vegetable oils to oxidized vegetable product selective treatment of petroleum oils in the amount of 3-30 wt.% to the reaction mass. Stirring at this temperature continued for 20-30 minutes, the Obtained product is used as film-forming to obtain the composite drying oil, adding the drying agent and solvent.

To obtain the modified vegetable oils used the following products:

1. Oxidized vegetable oils (sunflower, soybean) TU 205 of the RSFSR 11-389-81 with the following quality indicators are presented in table.1.

2. Fortunally extract oils - FEM (TU 38.407352-87) representing a mixture of polycyclic naphtenoaromatics hydrocarbons with a short side chain (80% ) and aliphatic hydrocarbons (about 10%), seal products (about 10%) with the following indicators are presented in table. 2.

The results of determination of aromatic compounds in the product "FEM" by means of UV-spectroscopy:

Adnakolava aromatic compounds 20-30%

Controllable two-annular aromatic compounds 30-40%

Multiring aromatic compounds 5-10

The chromatogram is not typical for this product because it contains a seal products.

FEM receive at the Kremenchug refinery in the selective purification of petroleum oils from negelected of oil and a certain amount of solvent (refinity solution) another of the solvent, containing undesirable components, and is called the extract solution. After removal of the solvent is furfural from the extract solution obtained FEM.

Process for production of modified vegetable oils is carried out in a glass flask with heating and stirring.

P R I m e R 1. In a flask equipped with a stirrer, was loaded at a temperature of 20aboutWith oxidized sunflower oil 100 grams, add with stirring PES 11 g (9.9 per cent to the reaction mass) and incubated with stirring for 20 minutes the quality of the resulting modified oil was tested in the compositions of drying oils, obtained on the basis of this oil. The results of the analysis are given in table.3.

P R I m m e R 2. Oxidized sunflower oil is cooled in the reactor to 120aboutWith, select a sample of 100 g is transferred into a flask and at this temperature, add with stirring FEM 25 g (20,0% of the reaction mass), then maintained under stirring for 30 minutes

As described in examples 1-2 methods conduct experiments 3-13 with the change in the amount of modifier, temperature, mixing time, and the data are summarized in table.3.

On the basis of the obtained in examples 1-13 film-forming (modified oils) poluchaetsja drying oil analyzed for the following parameters: time of drying the film to the extent 3 GOST 19007-73; the volume fraction of sludge GOST 5481-66; viscosity GOST 8420-74; the strength of the film bending GOST 6806-73; film hardness by pendulum device GOST 5253-87; mass fraction of the film-forming GOST 17537-72.

A METHOD of OBTAINING MODIFIED VEGETABLE OILS by combining oxidized vegetable oils with the modifying agent when heated, characterized in that the modifying agent is used by 3 to 30 wt.% from the reaction mass furfuralcohol extract oil is a by-product of selective treatment of petroleum oils with an initial boiling point not lower than 200oAnd the process is carried out at 20 - 120oWith stirring for 20 - 30 minutes

 

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