The method of obtaining a product having adhesive properties of grain

 

(57) Abstract:

Usage: the invention relates to mining, paper, textile and other industries. The inventive method of obtaining a product having adhesive properties of grain provides its mixing with the alkaline solution, the introduction of the catalyst, which is used as the compound of copper, stirring the mixture with simultaneous aeration, the process at 50 - 100°C to achieve a desired pH value. table 4.

The invention relates to the production of water-soluble adhesives for use in paper industry, construction, agriculture, drilling fluids, textile industry, namely the method of production of a product having adhesive properties of grain.

The proposed method of obtaining a product with adhesive properties of grain is unknown and is new.

The method consists in the processing of grain raw material aqueous alkaline solution in the presence of a catalyst, which is used as compounds of copper, with constant stirring with simultaneous aeration. The process is conducted at 50-100aboutTo achieve the set is C grain raw materials, which can be used waste agriculture.

As grain feedstock to obtain a product with adhesive properties can be used substandard corn (processed with pesticides and lost germination); rice meal produced after grinding rice; grain seeds affected by fungal diseases, and other agricultural waste.

The method consists in the following:

Grain raw materials, which can be used in agriculture wastes that must be destroyed, is loaded into the reactor, water is added, the catalyst, which is used as compounds of copper, alkali and with constant stirring through a solution allow oxygen or air.

Grain raw material consists of starch, protein, fat and fiber. The process is the modification of all components of the grain.

Secondary and part of the primary alcohol groups of the starch subjected to oxidation with the formation of carboxylic groups and there is a partial gap glucosidic relations with decreasing molecular weight of the starch. In the oxidative modification of the polysaccharide becomes of glycerol, salts of fatty acids and amino acids.

Cellulose, like starch, in the presence of bases and compounds copper is oxidized by oxygen to carboxyl-containing derivatives. Along with low molecular weight water-soluble derivatives are formed modified carboxyl groups, but water-insoluble compounds with large molecular weight.

As a result of processing of grain raw materials by the described method is dissolved in water the greater part of it and decrease the viscosity of the processed mixture. The final product is a suspension containing the soluble part of the low molecular weight fatty acids, amino acids and carboxyl-containing derivatives of carbohydrates (in the form of salts). As an insoluble suspension is poorly hydrolyzed protein, salt carboxypropanoyl cellulose and starch with high molecular weight (M M more than 106).

Processing of raw grain is completely stopped after neutralization introduced into the reaction mixture grounds acids formed during processing. In some cases (for example, for receiving drilling mud components of grain), it is advisable to carry out the process not euromania grain.

Suspension, due to the presence in their composition of copper compounds that are not susceptible to rotting and can be stored without changing the physical-chemical properties during the year.

Suspension can be dried using standard methods (roller drying, drying flue gases, and so on) and the product with adhesive properties, can be obtained in dry form.

P R I m e R 1. In a steel reactor with a capacity of 15 l load 1.5 kg rice husking bran formed after grinding the rice. Add to 8.0 liters of water and 15 g of copper acetate. The solution is stirred and poured 0.5 liters of an aqueous solution of KOH with a concentration of alkali 2 M from the Bottom through the bubbler serves air flow (air flow 1 l/min). Include temperature control. Working temperature 65aboutC. the processing Time is 10 hours For processing time, the concentration of alkali in the solution is reduced from 0.1 to 0.05 M In the processing of rice husking bran formed suspension with a viscosity of 85 CPS (at 65aboutC. At room temperature the suspension is transferred into a paste-like state.

The suspension obtained has a high adhesive ability and can be used as one component in the production of chipboard (particleboard).

In table. 1 prajavani suspension, obtained by treating rice husking bran, and as the second binder is a phenol-formaldehyde resin. For comparison, the physico-chemical characteristics of particleboard using only the phenol-formaldehyde resin (KF-MT).

From table. 1 shows that the replacement of 25% phenol-formaldehyde resin in aqueous suspension of the product obtained from waste grain raw materials significantly increases the tensile strength of particleboard. In addition, the use as a binder of the product obtained from grain raw materials, reduces toxicity chipboard 30-40%.

P R I m m e R 2. In a steel reactor with a capacity of 15 l load 2 kg substandard seeds of wheat infected with Fusarium), 20 g of copper acetylacetonate and 8.5 l of water. The solution is stirred until complete dissolution of the complex of copper and add 25 g of KOH. Include temperature control and begin to barbthroat through a solution of the air (2.0 l/min).

Working temperature 70aboutC. the processing Time is 25 hours as a result of processing of wheat grains formed suspension with a viscosity of 10 CPS (at 70aboutC. the alkali Content in the solution decreases with 0,045 to 0.002 M

Due to the high adhesive properties, the product obtained in the described manner of grain, can be used for the second raw material forms on the surface of seeds solid films, able to keep crickets (pesticide), growth factors, trace elements. In table. 2 summarizes the sapping films with crickets from the surface of the seed corn after shaking. For comparison, data of sapping the most widely used water-soluble glue used including as incrustate seeds - sodium salt of carboxymethylcellulose (Na CMC). As crickets were used tetramethylthiuramdisulphide (TMTD).

Asiaeast films after intense shaking was determined by the decrease TMTD on the surface of the grains of corn.

As you can see from the table. 2, the product obtained by processing the raw grain, has a good adhesive property with respect to corn and much stronger holds on the surface of seeds, pesticides compared with the most widely used water-soluble adhesive - Na CMC.

P R I m e R 3. In a steel reactor with a capacity of 15 l load 2 kg of corn processed by tetramethylthiuramdisuphide (TMTD) and lost germination (substandard seed corn). Add 8 l of water and 25 g of CuSO45H2O. the Solution is stirred for 1-2 min to propotionate oxygen (0.3 l/min).

During processing maintain the temperature of the 75aboutC. the processing Time is 5 o'clock In the processing result formed a stable suspension with a viscosity of 20 CPS (at the 75aboutC.

During processing, the concentration of free alkali in the solution decreases from 0.25 to 0.03 M TMTD according to spectrophotometric analysis completely destroyed in the first 20 min of treatment with the formation of non-toxic sulfates. The suspension obtained due to the presence of copper ions has fungicidal properties and can be stored without modifying properties in a few months.

The product of grain can be used in drilling oil and gas wells as environmentally friendly lubricating additives, water reducer filter and stabilizer solution, however, as follows from Fig. 3, it is possible to eliminate the use as lubricating oil supplements, the application of which leads to environmental pollution.

Along with reducing the coefficient of friction when replacing the oil product of grain, to the positive properties of the drilling fluid containing this product should be attributed to increase its density and decrease water filter (f).

P R I m e R 4. In Cody, 10 g of copper acetate and 45 g of CA(Oh)2. The solution is stirred and bottom through the bubbler serves a current of oxygen (oxygen flow rate of 0.5 l/min). Include temperature control. Working temperature 85aboutC. the processing Time is 3 o'clock

During processing, the concentration of base in the solution is reduced from 0.06 to 0.01 M In the processing of the formed suspension with a viscosity of 55 CPS (at 85aboutC.

The product obtained by processing rice husking bran in the presence of calcium hydroxide and salts of copper, can be used as an adhesive in the manufacture of paper.

In table. 4 shows data illustrating the effectiveness of the use of the product from grain raw material in paper production. The tests were carried out on castings paper weight 955 as a reference the results of the test castings paper using traditional binder is corn starch.

As you can see from the table. 4, using the product obtained from agricultural waste, allows you to get the paper with the best physical and mechanical properties compared to paper produced using corn starch.

P R I m e R 5. In a steel reactor with a capacity of 15 l load 2.5 kg of grains of barley, the bottom through the bubbler serves a current of oxygen (0.3 l/min).

Working temperature 95aboutC. the processing Time is 3 hours After treatment is formed aqueous suspension with a viscosity of 5 CPS at 95aboutC. For a processing time of the concentration of free alkali in the solution decreases from 0.6 to 0.05 M

The suspension can be used for surface and interlayer gluing cardboard. There is a high adhesive ability of the product from grain raw material to the cardboard and quality cardboard with the interlayer and surface sizing suspension obtained from grain raw materials, higher quality scores cardboard using starch glue (increases smoothness and resistance to delamination).

P R I m e R 6. In a steel reactor with a capacity of 15 l load 1 kg of sorghum seeds, 2 g CuSO4add 9 liters of water and 60 g of KOH. The solution is stirred with a mechanical stirrer, include temperature control and from the bottom through the bubbler serves oxygen (0.1 l/min).

Temperature processing 55aboutC. the processing Time is 7 hours For processing time, the concentration of alkali in the solution decreases from 0.1 to 0.06 M After processing the formed aqueous suspension with a viscosity of 50 CPS (at 55aboutC.

To 1 l of the suspension was added 1 kg of crushed chalk and the mixture was thoroughly stirred. The result is a paste the x finishing works, for example, whitewashing walls and ceilings of wood, brick and concrete buildings. After processing is formed on the surface of smooth white layer of whitewash, resistant to shattering.

The data show that the proposed method of obtaining a product having adhesive properties of grain raw materials allows to obtain in a single phase of valuable technical products, which can be used as an effective adhesives, lubricating additives and reducers filter for drilling fluids, adhesives for presowing treatment of seeds. The possibility of use as a source of raw agricultural waste to be destroyed, is a significant advantage of this method that allows you to refuse the application as adhesives, food products (starch, flour starch, casein, etc.,).

The METHOD of OBTAINING a PRODUCT HAVING ADHESIVE PROPERTIES of GRAIN, characterized by the fact that the latter is mixed with an alkaline solution, introducing the catalyst, which is used as the compound of copper, the mixture is stirred for simultaneous aeration and the process is conducted at 50 - 100oTo achieve a given pH.

 

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