MXPA97005826A - Procedure for the obtaining of a complex composition, for washing machines and composition - Google Patents

Abstract

The present invention relates to a process for obtaining a composition to be used in washing machines, which comprises the stabilization and conditioning of hydrogen peroxide in a medium acid, the composition is particularly used for textile washing of colored fibers and delicate garments, the invention also comprises the composition obtained by said process. Hydrogen peroxide despite having good characteristics as a cleaning agent has not been widely used because it is a compound that decomposes very easily. In accordance with the process of the present invention and the composition that is obtained therefrom, hydrogen peroxide has been very successfully stabilized in a complex composition for washing machines. The process according to the present invention consists of several stages, among which is the preparation of water, which acts as a liquid vehicle and solubilizing agent of the chemical species that are added, the preparation of a gel or paste from a vinyl polymer or derivatives thereof, as well as the hydration thereof with the water initially prepared. In another step, the addition to said gel or paste of products such as optical whiteners, perfumes and dyes among others is carried out. Another important stage of this procedure is the overstabilization of hydrogen peroxide from chemical sequestering agents, the process continues with the addition of peroxide stabilized to the paste obtained previously and finally the adjustment of the pH of the same.

Description

PROCEDURE FOR OBTAINING A COMPLEX COMPOSITION, FOR WASHING MACHINES AND COMPOSITION OBTAINED The present invention relates to a process for obtaining a composition for use in washing machines, which comprises the stabilization and conditioning of hydrogen peroxide in acidic medium, the composition is used particularly for the textile washing of colored fibers and delicate clothes; The invention also comprises the composition obtained by said process.

Hydrogen peroxide is a compound known for its properties as bleach or bleach and has therefore been used in cleaning compositions, however this product presents a serious disadvantage, which refers to its instability and therefore, easy decomposition , which has limited its use as a bleach or in cleaning compositions for example of textiles.

As previously expressed, hydrogen peroxide is a chemical compound easily decomposed in water and oxygen, according to the following reaction: H2O2 - > H2O + V2 O2 + 98 Kj In addition to innumerable reactions of oxidation or reduction with large amount of materials, both organic and inorganic.

In the presence of a pollutant this decomposition reaction is accentuated, being especially dangerous salts of iron, cobalt, chromium, vanadium, molybdenum, silver and platinum, with concentrations of a few p.p.m. to trigger the reactive processes of decomposition. There are two mechanisms of decomposition reaction: a) Homogeneous decomposition.- It is a chain reaction, in which the metal ion is oxidized and reduced successively, and hence, small concentrations of impurities present a catalytic action with such negative effects, being considered especially active the catalysts that give rise to multivalent ions. Certain chelants / sequestrants have the property of inhibiting the catalytic action of metals and, for this reason, repeated additions of these will take place in the present invention. b) Heterogeneous decomposition - takes place by contact with insoluble solid material. The speed of this type of decomposition varies enormously according to the material and the state of the surface of the same. It has been proven that the addition of colloids that absorb or adsorb impurities reduce this mechanism of decomposition, cushioning in other cases the shocks caused by the turbulences that occur at the time of handling or transport of the products.

According to the present invention, a method for the effective stabilization of hydrogen peroxide in an acidic medium has been developed in a complex composition, which allows to use its excellent properties as a cleaning agent; by means of this method, problems are solved with respect to an effective stabilization of hydrogen peroxide in an acid medium, allowing an effective use thereof. On the other hand, the obtained composition of which the stabilized hydrogen peroxide forms part, overcomes problems related to the inadequate performance of the cleaning function, due to the instability of the hydrogen peroxide.

The process according to the invention is relatively simple and brief, basically consisting of successive additions of different products, in the following way: 1. Preparation of water that acts as a liquid vehicle and solubilizing agent of the chemical species that are added. The water has to be circulated through successive steps of decalcification, reverse osmosis and ion exchange, a certain chemical purity must be reached at this stage, which in terms of conductivity can not exceed 500,000 μs / cm. If this value is not reached, the water is recirculated automatically to the ion exchange stage. 2. Addition of phenazetine and polycarbonic acid. The required amount of the water resulting from the previous stage for the dilution of hydrogen peroxide was deducted about 100 liters that are introduced in an attached deposit of aluminum metal of purity not less than 99.5%, and that will serve to dissolve chemically pure fenacitina. The dilution method consists of heating the water to boiling point, starting at this point to add the phenacltine slowly and under constant agitation, in a concentration between 100 to 500 mg / l depending this amount directly on the degree of purity of the water and, very especially of iron content in water. Maintaining the stirring and the boiling temperature is solubilized after a few minutes. To the remaining water of the previous stage, modified polycarbonate acid is added in quantities of between 10 and 100 mg / l related in order directly proportional to the level of ions present in the water and to the final concentration of hydrogen peroxide that is desired, later mixing the two solutions obtained, corresponding to phenacytine and polycarbonate acid.

Addition and mixing to the solution obtained in the previous step of a carboxy vinyl polymer or derivatives thereof in slow form in an acid medium, and in amounts comprised between 0.1 and 2%, this quantity depending directly on the desired rheological profile and inversely on the salt concentration present in the final product. After a period of slow agitation with speed of rotation between 50 and 300 r.p.m. and with passivated metal blade propeller, it is left to rest for a period of not less than two hours, during which the hydration of the polymer takes place by the solvent, with the consequent increase in the size of the macromolecule, becoming at this moment the dissolution in a gel.

Addition to the paste originated in the third section, previously well homogenized of the following components: • Optical bleaching, stable stybic derivative in acid medium and strongly oxidizing, in percentage between 0.05 and 0.2%. • Stable perfume in acid and oxidant medium, in percentage between 0.1 and 1%. • Stable dye in acid and oxidant medium. • Ethylene diamine tetraacetic acid in a percentage between 0.1 and 1%.

Over-stabilization of commercial hydrogen peroxide (concentration between 35 and 50%) with chemical sequestering agents such as dipicolinic acid and modified phosphonate in proportions of 0.01 and 0.1% in high density polyethylene tanks, and stirring with blades of passivated metal, at a temperature not higher than 35 ° C and a speed of rotation between 50 and 500 rpm This hydrogen peroxide stabilized in this way can be used for industrial bleaching at the starting concentration or can be passed to the next stage for the manufacture of the product object of this invention. 6. Addition at room temperature to the paste obtained in section 4, of the amount required for the desired dilution of the peroxide stabilized in step 5, under constant agitation and over the vortex of agitation avoiding the formation of foams. 7. Addition to the product resulting from the previous operation of nonionic surfactant (nonylphenolpoliglicoleter or similar) at a temperature between 10 and 30 ° C in an amount of between 0.5 and 5% under constant agitation with passivated metal blades, with speed of rotation between 50 and 250 rpm, for about 15 minutes. 8. Adjusting the pH of the mixture obtained in the above-described steps to a value comprised between 2 and 5 with phosphoric acid of high chemical purity, making said addition in the same tank and in the same conditions of the preceding section.

This stage of pH adjustment is of special importance since it is in this range in which the peroxide presents its greatest stability.

After this last operation, the resulting product will be left to rest for a period of not less than half an hour, with the presentation of the product having a pinkish, crystalline and consistent appearance ready for its subsequent filling and use.

The product thus formulated maintains its properties for long periods of time, and due to the high remnant in complex chelates maintains its detersive properties even in environments with strong electrostatic charge such as hard water.

Applying the procedure described above, compositions with the following characteristics are obtained.

'% Fenacitin 0.01 0.08 0.05 Polycarbonate acid 0.001 0.0055 0.01 Polycarboxyvinil 0.1 1.05 2 Optical brightener 0.05 0.125 0.2 Perfume 0.1 0.55 1 Ethylene diamine tetraacetic acid 0.1 0.55 1 Dipicolinic acid 0.01 0.055 0.1 Phosphonate 0.01 0.055 0.1 Nonionic surfactant 0.5 2.75 5 Phosphoric acid 0.1 0.15 0.2 Hydrogen peroxide 5 7.62 10 Demineralized water 94,019 87.00 79.34 Coloring Traces Traces Traces Finally, it is to be borne in mind that as described in the present invention will fit as many variants of embodiment as possible without altering the general picture of the same, being able to use the aforementioned products, their substitutes, derivatives or compounds, provided they meet the right conditions for it.

Claims (8)

2. Process for obtaining a complex composition for washing machines, characterized in that it comprises the following steps: 1) preparation of water that acts as a liquid vehicle and solubilizing agent of the chemical species that are added; 2) dissolve fenacitin in part of the water prepared in the previous stage, in an aluminum deposit of not less than 99.5% purity at the boiling temperature of the water and under constant agitation, polycarbonate acid is added to the remaining water of the first stage. modified proportional to the level of ions present in the water and to the final concentration of hydrogen peroxide that is desired; then mix the two solutions obtained from phenazine and polycarbonate;
3. 3) addition and mixing to the solution obtained in the previous step of a carboxyvinyl polymer or derivatives thereof in a slow manner, in an acid medium and in amounts comprised between 0.1 and 2 % with slow agitation first and then resting, forming a gel;
4. 4) add to the paste originated in the previous stage, previously well homogenized of the following components: Optical brightener, stable perfume in acid medium, dye and ethylene diamine tetraacetic acid;
5. 5) destabilize commercial hydrogen peroxide concentration between 35 and 50% with sequestering chemical agents;
6. 6) add to the paste obtained in step 4 the quantity required for the desired dilution of the peroxide stabilized in step 5 under constant agitation and over the vortex of agitation, avoiding the formation of foams;
7. 7) addition to the product resulting from the preceding stage of nonionic surfactant, such as nonylphenolpoliglicoleter, at a temperature between 10 and 30 ° C, in an amount between 0.5% and 5% under constant agitation for up to 15 minutes;
8. 8) adjust the pH of the composition obtained in the previous steps to a value between 2 and 5 and let the composition obtained stand for a period of not less than 30 minutes, the presentation of the composition being pinkish, crystalline and consistent, ready for its subsequent filling and use. Process for obtaining a complex composition for washing machines, according to claim 1, characterized in that the water is prepared by circulation through successive stages of decalcification, reverse osmosis and ion exchange, a certain purity having to be reached at this stage. chemistry, which in terms of conductivity can not exceed 500,000 μs / cm. If this value is not reached, the water is recirculated automatically to the ion exchange stage. Process for obtaining a complex composition for washing machines, according to claim 1, characterized in that the overstabilization of the commercial hydrogen peroxide is carried out with sequestering agents such as dipicolinic acid and modified phosphonate in proportions comprised between 0, 01 and 0.1% in high density polyethylene tanks and agitation with passivated metal blades, at a temperature below 35 ° C, at a speed of 50 to 500 rpm Process for obtaining a complex composition for washing machines, according to claim 1, characterized in that the destabilized hydrogen peroxide can be used directly for industrial bleaching at the starting concentration or become part as a component of the composition . Process for obtaining a complex composition for washing machines, according to claim 1, characterized in that the final conditioning components are added to the product obtained and in the following order: optical brightener in percentage comprised between 0.05 ,2 %; perfume in percentage comprised between 0.1 and 1%; dye and ethylene diamine tetraacetic acid in a percentage comprised between 0.1 and 1%. Maintaining agitation at all times with gentle cutting effort. PROCESS FOR OBTAINING A COMPLEX COMPOSITION FOR WASHING MACHINES, according to claim 1, characterized in that the surfactant of nonylphenolpoliglicoleter is added at a temperature comprised between 10 and 30 ° C and in a concentration comprised between 0.5 and 5% , maintaining the agitation of constant form and with smooth shear, with values of speed of rotation comprised between 50 and 250 rpm, during 15 minutes. Process for obtaining a complex composition for washing machines, according to claim 1, characterized in that the pH of the composition is adjusted with phosphoric acid of high purity, so that the resulting product after this addition present pH values included between 2 and 5, the aforementioned addition being made in the same deposit and maintaining the conditions established in clause 6. Complex composition for washing machines obtained by the method claimed in claims 1 to 7, characterized in that it comprises: hydrogen peroxide of about 5 to 10%, phenazetine of about 0.01 to 0.05%, polycarbonic acid of about 0.001 to 0.01%, acid polycarboxyvinyl from about 0.1 to 2%; optical brightener, perfume, ethylene diamine tetraacetic acid, dipicolinic acid, phosphonate and phosphoric acid which together are in percentages of approximately 0.37 to 2.6%, nonionic surfactant of approximately 0.5 to approximately 5%, demineralized water of approximately 79.34 to 94.019% and coloring in traces. SUMMARY The present invention relates to a process for obtaining a composition for use in washing machines, which comprises the stabilization and conditioning of hydrogen peroxide in acidic medium, the composition is used particularly for the textile washing of colored fibers and delicate clothes; The invention also comprises the composition obtained by said process. Hydrogen peroxide despite having good characteristics as a cleaning agent has not been widely used because it is a compound that decomposes very easily. In accordance with the process of the present invention and the composition that is obtained therefrom, hydrogen peroxide has been very successfully stabilized in a complex composition for washing machines. The process according to the present invention consists of several stages, among which is the preparation of water, which acts as a liquid vehicle and solubilizing agent of the chemical species that are added, the preparation of a gel or paste from a vinyl polymer or derivatives thereof, as well as the hydration thereof with the water initially prepared. In another step, the addition to said gel or paste of products such as optical brighteners, perfumes and dyes among others is carried out. Another important step of this process is the overstabilization of hydrogen peroxide from chemical sequestering agents, the process continues with the addition of the peroxide stabilized to the paste obtained previously and finally the adjustment of the pH thereof.