The method of oxidation of vegetable oils

 

(57) Abstract:

The invention relates to the oil industry, in particular to oligourethane production. The oxidation is carried out from a temperature of 15-20 to a temperature of 120-130oWith in one step by a continuous air flow shell-and-tube jet-injection absorber. The invention allows to oksidirovanii vegetable oil intensity and environmentally friendly way. table 1. , 1 Il.

The invention relates to the oil industry, in particular to oligourethane production.

There is a method of oxidation of vegetable oils periodic method [K. A. Melnikov and other USSR Author's certificate 810748, class C 09 F 7/02, 1981. The method of oxidation of vegetable oil], which consists in the fact that the process is carried out continuously, the temperature change speed in five sections of the reactor column type.

In the initial stage, the oil is heated to 130-140oWith and gradually decreases its temperature, the fifth section is reduced to 100-110oC. the oxidation Time of 0.5-1 hour. Obtained in this method the drying oil corresponds to GOST 7931-76.

The disadvantage of this method is that at the stage podogrevalki [A. M. Ivanov. USSR author's certificate 1819282, class C 09 F 7/02, 1993. The method of oxidation of vegetable oils], which consists in the fact that the oil is pre-heated at a temperature of 40-90oWith simultaneous blowing of air, and then at a temperature of 115-120oAlso perform the air purge with varying its flow.

The disadvantage of the above method is the presence of special devices for blowing the oil with air and use it only in large-scale continuous production.

In connection with the development of small industries there is a need for new technologies that would allow at low cost to manufacture products in small quantities.

The objective of the invention is the creation of high-intensity, environmentally friendly method of oxidation of vegetable oils.

The task is solved in that the oxidation is carried out from the temperature 18-20oWith temperatures of 120-130oWith in one step (i.e., are combined in a single stage heating and oxidation) by continuous air supply. Oxidation in one step from t=15-20oWith up to t=120-130oC gives the opportunity to reduce energy costs and the formation of environmentally harmful ve the oxidation of vegetable oil. Temperature 120-130oWith a finite temperature oxidation.

Below 120oWith the oil oxidizes at a slower rate, resulting in an increase in the overall time of the process. Above 130oWith increases the probability of formation of environmentally harmful substances. Furthermore, increasing temperature leads to unnecessary increase in energetic cost. The method of oxidation is carried out in one step, which means that the air supply is automatically and continuously from the initial temperature to the end of the process of oxidation due to its injection (the self-priming jet oxidizable oil).

Implementation of the proposed method was made possible thanks to the use of shell-and-tube jet-injection absorber [C. B. Tishin and other Cultivation of Baker's yeast in high concentration environments. Meiwes. collected scientific articles. Tr. : Machinery, plant, processes and devices of food technology. - L.: LTIP, 1990], in which the gas disperser is used, the kinetic energy of the liquid jet, resulting in a finely dispersed gas-liquid mixture with a highly developed interface, which increases the rate of dissolution of oxygen in m is edstaveni in the drawing, as follows: tank 1 is filled with oil with a temperature of 15-20oWith circulation pump 2, which delivers the oil in the tube of the jet injection absorber (oxidator) 3. The design of the absorber is such that simultaneously with the beginning of the circulation begins to leak in the apparatus (without forced feeding), heating of the gas-liquid mixture and the oxidation of the oil.

Example. Linseed oil was poured into the container 1 with a temperature of 18oWith the included pump 2, shirt, shell-and-tube jet-injection absorber pairs were submitted and was heating the oil to a temperature of 130oWith its simultaneous oxidation by oxygen in the air for 15 minutes At a temperature of 130oThe oxidation was continued for 25 minutes After which the process ended. The total oxidation time was 40 minutes

Obtained by the proposed method, the drying oil met the state standard 7931-76 and had the following quality indicators (see table).

The method of oxidation of vegetable oils, including heating and continuous flow of air in one step, characterized in that the oxidation is carried out from a temperature of 15-20 to a temperature of 120-130oWith, and for continuous air supply use the mental energy of the liquid jet.

 

Same patents:

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 invention relates to coatings industry and can be used for the manufacture of one of the components for the synthesis of varnish-the basis for pentaftalevyh paints (enamels)

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

The invention relates to a method for epoxydecane vegetable oils, which are used as plasticizers stabilizers of polyvinyl chloride, various non-toxic polymer compositions

FIELD: production of vegetable oils and fats acid polyvalent metal salts useful as catalysts and siccatives in tannery, paint-vehicle industry, etc.

SUBSTANCE: claimed salts are obtained by reaction of alkali salts of fatty acids with aqueous solution of water soluble polyvalent metal salt or mixture thereof. Alkali or ammonia salts are obtained by qualitative alkali hydrolysis of respective vegetable oil, fats, low viscous oxidates or mixture thereof under strenuous stirring and gradual temperature rising from 20-30°C to 60-100°C with equivalent amount alkali or ammonium in form of 3,26-48,46 % aqueous solution for 3-10 min in presence of initial additive of sodium stearate or oleate in amount of 0.5-1.0 % based on mass of hydrolyzed substance up to residual alkali content in system not more than 2-3 % based on starting value, followed by stirring for 10-15 min. In obtained reaction mixture under stirring and at mentioned above elevated temperature previously prepared and heated up to 60-98°C aqueous solution of water soluble polyvalent metal salt or mixture thereof for 10-20 min is introduced in amount of 1 g-eq/mol of alkali used for hydrolysis followed by stirring for 15-20 min. Then obtained salt composition is separated from aqueous phase by filtration, centrifugation or extraction with organic solvent.

EFFECT: polyvalent metal salts with anion composition fully (quantitatively and qualitatively) corresponding to acid composition of respective oil or fat.

5 cl, 3 tbl, 21 ex

FIELD: chemical technology.

SUBSTANCE: invention relates to greasing and emulsifying substances used in fur, leather and other branches of industry. Invention describes a method for deep sulfonation of oxidized vegetable oils, fats and their mixtures, and oxidized mixtures with the nominal viscosity value in the range 33-75 by viscosimeter VZ-4 at 20°C in their treatment with sodium sulfite. The process is carried out in system consisting of oxidized component or mixture of oxidized components, sodium sulfite, water and soap additives, carboxylic acid, phenol and copper (II) salt as a catalyst in bead mill of vertical type at temperature of environment up to practically complete ceasing or quantitative consumption of sodium sulfite and charge of the latter is calculated by the following formula: mNA2SO3 = 0.006 x mOX x (I.N.)OX wherein mOX and (I.N.)OX mean mass and iodine number of oxidized component or mixture of oxidized components, respectively. The mass ratio of oxidized component and water varies in the range from 1:4 to 1:2.5. Dosing additives with respect to oxidized component are following: soap, 2%; carboxylic acid, 4%; phenol, 2.5%. Oxidized flax, sunflower, soybean and cotton oils, oxidized fish oil and mixtures of vegetable oils with fish oil or pig fat are subjected for sulfonation reaction with air in regimen of intensive bubble bubbling at 105 ± 5°. Soaps in indicated system are represented by sodium stearate and sodium oleate and by reaction mixtures of practically quantitative alkaline hydrolysis of fats and vegetable oils also. Benzoic, oxalic, malonic and citric acids are used as acid, and sulfate, acetate and other water-soluble salts of copper (II) are sued as a catalyst dosed in the amount (2-7.5) x 10-4 mole/kg of the parent charge. The sulfonation reaction degree is 33-40%.

EFFECT: improved preparing method.

5 cl, 1 tbl, 16 ex

FIELD: chemistry.

SUBSTANCE: method includes preliminary heating of oils at a temperature of 40-90C with simultaneous air blowing and following oxidation of oils by air with heating. Oxidation is carried out until oxidate, viscosity of the solution of which in white spirit constitutes 19-25 s. At the stage of preliminary heating air with the content of ozone of 1.5-2.5 mg/l is blown through oil with the consumption of not more than 4 l/minkg, and oil heating is realised by a heater from a temperature 40C to 90C at a rate of 2.5 degree/min. Sulphonic acids in an amount of 0.05-0.15% of oil weight and manganese (II) stearate in an amount of 0.8-1.5% of oil weight are added to oil, and the temperature mode of oxidation is supported by heating of oil to a temperature of 175C at a rate of 3-5 degree/min with the following periodical cooling to a temperature of 100C. The quantity of heating and cooling cycles of oil constitutes not fewer than two, and air consumption is supported at the level not higher than 4 l/minkg.

EFFECT: reduction of the vegetable oil oxidation time, with obtaining a film-forming substance with required quality parameters, simplification of the technological process.

2 dwg, 1 tbl, 1 ex

FIELD: chemistry.

SUBSTANCE: self-oxidizing polymer composition includes a drying agent obtained by mixing 1,4,7-trialkyl-1,4,7-triazacyclononane (L) and a manganese salt having the general formula Mn2+[X]n, in which, as the anion X, PF6-, SbF6-, AsF6-, BF4-, B(C6F5)4-, Cl-, Br-, I-, NO3- or R2COO-, and in this case n=2, or the anion X is SO42-, and in this case n=1, where R2 is C1-C20-alkyl. The 1,4,7-trialkyl-1,4,7-triazacyclononane (L) is present in the mixture in such an amount that the molar ratio of L:Mn is at least 1.25:1 and preferably at least 1.5:1. A coating composition consisting of a self-oxidizing polymer composition, a method for coating a substrate, a substrate, and applying the composition to paints, compositions, varnishes, inks and glazes and using a mixture of L and Mn as a drying agent for an air-drying self-oxidizing polymer composition are also disclosed.

EFFECT: provision of cobalt-free catalysts that can provide rapid drying and at the same time contribute to reducing the yellowness of the coating compositions.

14 cl, 12 tbl, 15 ex

FIELD: chemistry.

SUBSTANCE: composition includes a dehumidifier for self-oxidizing resin composition, drying in air, and a polymer comprising unsaturated aliphatic groups. Mentioned dehydrator is prepared by mixing the manganese salt with 1, 4, 7-trisubstituted-1, 4 ,7-triazacyclononane (L). The manganese salt has the general formula Mn2+[X]n, in which the anion X is selected from PF6-, SbF6-, AsF6-, BF4-, B(C6F5)4-, Cl-, Br-, I-, NO3- or R2COO-, in this case n=2, or the anion X is SO42-, where n=1, and where R2=C1-C20 Alkyl. In this case, 1,4,7-trialkyl-1,4,7-triazacyclononane (L) is present in the mixture in such an amount that the molar ratio of Mn:L is at least 1.25:1, preferably at least 1.5:1 and less than 20:1. The coating composition, the method for coating the substrate, the substrate coated with the composition, the use of the composition in paints, glues, varnishes, inks and varnishes and the use of a mixture of 1,4,7-trialkyl-1,4,7-triazacyclononan (L) and manganese salt as a dehumidifier for self-oxidizing resin composition, drying in air.

EFFECT: providing non-cobalt catalysts for coating formulations containing them, and which simultaneously provide quick-drying coatings that have significant hardness and gloss properties.

14 cl, 9 tbl, 3 ex

FIELD: chemistry.

SUBSTANCE: method is described for oxidating vegetable oil in an oxidation column, consisting in the fact that to begin the oxidation process the column is filled with oil preheated to the temperature of 115-120C, and air bubbling starts, initiating the oxidation process, in which, after the oxidation process in the column begins and the oil temperature inside the column rises to 145-150C, oil is supplied to the bottom of the column from the additional tank, into which, before feeding it to the column, a certain amount of desiccant catalyst initiating the oil oxidation is added, oil heated by the reaction heat is oxidized, and a part of the oxidized oil is withdrawn from the top of the column and returned into the tank, circulating until the viscosity of the oxidized oil reaches the set value.

EFFECT: energy saving, the possibility of oxidizing a large amount of oil in an oxidizing column of small dimensions by circulating oil through an oxidation column.

2 cl, 1 dwg

FIELD: chemistry.

SUBSTANCE: method includes preliminary heating of oils at a temperature of 40-90C with simultaneous air blowing and following oxidation of oils by air with heating. Oxidation is carried out until oxidate, viscosity of the solution of which in white spirit constitutes 19-25 s. At the stage of preliminary heating air with the content of ozone of 1.5-2.5 mg/l is blown through oil with the consumption of not more than 4 l/minkg, and oil heating is realised by a heater from a temperature 40C to 90C at a rate of 2.5 degree/min. Sulphonic acids in an amount of 0.05-0.15% of oil weight and manganese (II) stearate in an amount of 0.8-1.5% of oil weight are added to oil, and the temperature mode of oxidation is supported by heating of oil to a temperature of 175C at a rate of 3-5 degree/min with the following periodical cooling to a temperature of 100C. The quantity of heating and cooling cycles of oil constitutes not fewer than two, and air consumption is supported at the level not higher than 4 l/minkg.

EFFECT: reduction of the vegetable oil oxidation time, with obtaining a film-forming substance with required quality parameters, simplification of the technological process.

2 dwg, 1 tbl, 1 ex

FIELD: chemistry.

SUBSTANCE: method is described for oxidating vegetable oil in an oxidation column, consisting in the fact that to begin the oxidation process the column is filled with oil preheated to the temperature of 115-120C, and air bubbling starts, initiating the oxidation process, in which, after the oxidation process in the column begins and the oil temperature inside the column rises to 145-150C, oil is supplied to the bottom of the column from the additional tank, into which, before feeding it to the column, a certain amount of desiccant catalyst initiating the oil oxidation is added, oil heated by the reaction heat is oxidized, and a part of the oxidized oil is withdrawn from the top of the column and returned into the tank, circulating until the viscosity of the oxidized oil reaches the set value.

EFFECT: energy saving, the possibility of oxidizing a large amount of oil in an oxidizing column of small dimensions by circulating oil through an oxidation column.

2 cl, 1 dwg

Up!