RU2619584C1 - Concentrate of acid purification liquid - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: acid cleanser concentrate containing water and additives is described, wt %: electrochemically activated anolyte - 70-75, hydrochloric acid - 5-10, orthophosphoric acid - 3-5, proxanol - 7-9 and alkyltrimethylammonium chloride - 4-8.

EFFECT: improving the performance of the cleanser in terms of surface cleanliness, detergency, reduced corrosion activity, inhibiting properties, and storage stability of the concentrate.

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Description

The invention - an acid cleaning agent concentrate (CBS) relates to technological processes where detergents are used to flush and degrease equipment and products from ferrous and non-ferrous metals and their alloys in engineering, chemical, petrochemical, mining and food industries.

The invention relates to the field of chemical treatment, to synergistic cleaning agents that do not contain organic solvents

Known acid liquid detergent [patent RU 2529318, cl. C11D 1/04, publ. 09/27/2014], containing citric acid, methylglycine diacetic acid, methanesulfonic acid, a mixture of nonionic surfactants (consisting of ethoxylated fatty acids) and water. The disadvantage of this acidic liquid detergent is the insufficient wettability of the surface being cleaned due to the low content of surfactants, hence the relatively low detergency and a small spectrum of contaminants removed.

The closest in technical essence and the achieved result is an acid cleanser for cleaning equipment [patent RU 2429287, cl. C11D 3/02, publ. 09/20/2011], containing, by weight. %: hydrochloric acid - 10-20, phosphoric acid - 5-10, Trilon B - 0.5-5, citric acid - 0.5-7, urea - 0.3-7, alkyldimethylamine oxide - 1-5, catamine AB - 0.1-5, water.

The prototype has good detergency in relation to mineral contaminants, as well as satisfactory inhibitory properties, however, in relation to oil contaminants, the product is ineffective.

The technical result of the invention is the elimination of these drawbacks and the creation of a cleaning agent with high detergency with respect to a wide range of contaminants, while having inhibitory properties, reducing corrosion activity and consumption of cleaning agent.

This goal is achieved in that the KOS concentrate for cleaning and degreasing solid surfaces is created on the basis of an electrochemically synthesized, activated, aqueous, analytical solution, which, due to a change in the water structure, provides synergies between the components of the KOS at the molecular and ion levels, which leads to improved operational CBS characteristics regarding cleanliness of the treated surface, washing ability, reduced corrosion activity and stability of the solution when stored ui.

This concentrate CBS contains, by weight. %:

Electrochemical activated anolyte (with ATS ϕ≤ + 300 mV and pH≥4) 70-75

Hydrochloric acid 5-10

Phosphoric acid 3-5

Proxanol 7-9

Alkyltrimethylammonium chloride 4-8

The technology for preparing KOS concentrate is simple. This concentrate is prepared in a reactor reactor with a capacity of 1 m ³ , made in explosion-proof stainless steel and having a mixing device. An electrochemical activated anolyte (calculated amount of 700 kg) is poured into the reactor, hydrochloric acid 100 kg and phosphoric acid 30 kg are added to the solution, after stirring and dissolution, 90 kg of proxanol are added, then 80 kg of alkyltrimethylammonium chloride are added with continuous stirring. The resulting solution is well mixed until all components are completely dissolved and the resulting uniform composition of the WWTP is poured into plastic cans or barrels.

The stabilization of the KOS concentrate is ensured by the hydroxyl groups of the electrochemical activated anolyte having an ORP of ϕ≤ + 300 mV and pH≥4.

Physico-chemical properties of the WWTP concentrate are shown in table 1.

In industrial applications, this concentrate is diluted with tap water of any hardness and is used in the form of a 3.0-5.0% aqueous solution, depending on the type of contamination and the surface to be treated.

Testing the solution of CBS based on the proposed concentrate was carried out according to the industry method OST 6-15-1662-90 "Determination of the cleaning ability of the detergent." This technique is based on the gravimetric determination of the mass of removed artificial pollution for a certain time. The test of the KOS solution was carried out on samples of St 3 metal grade 90 × 120 mm in size. Samples were twice wiped with gasoline, dried for 20 min in air and brought to constant weight in a desiccator. Weighed to the fourth decimal place. Pure samples were greased with industrial oil, suspended and left in the air for aging for 24 hours. Then they were weighed to the fourth decimal place and placed in a detergent solution for 5 minutes. Degreasing was carried out with stirring. After the processing time, the samples were removed, washed under a stream of tap water (15-20 ° C) for 1 min. After allowing excess water to drain, the samples were placed in ethyl alcohol and dried at a temperature of 100 ° C. The samples cooled and brought to constant mass in a desiccator were weighed to the fourth decimal place. The detergency of CBS was determined by the formula

D = (m ₁ -m ₂ ) / (m ₁ -m ₃ ) ⋅100,

where D is the washing ability of the WWTP,%;

m ₁ - mass of samples fried with oil, g;

m ₂ - the mass of samples, fat-free in detergent, g;

m ₃ is the mass of samples after degreasing in gasoline,

The obtained test results of the WWTP are given in table 2.

As can be seen from table 2, the washing ability of the proposed WWTP is higher than that of the means of the prototype. A cleanser obtained from KOS concentrate has low detergency values at a concentration below 3%. The tests showed that metal samples do not corrode from the action of the solution of the proposed cleaning agent.

Thus, the cleaning agent based on the proposed KOS concentrate has a high washing ability, reduced corrosion activity. The low concentration of 3.0-5.0% of the use of this WWTP ensures the fulfillment of environmental requirements for washing solutions, reducing production costs and economic efficiency of use. The experience of using this KOS concentrate has shown that it is universal and can be used to clean the surfaces of solids of various structures.

Claims (2)

An acid cleansing concentrate containing water and additives, characterized in that the main substance is an electrochemical activated anolyte with pH≥4 and redox potential (ORP) ϕ≤ + 300 mV (pH≥4), and as an additive a mixture of hydrochloric and phosphoric acids, proxanol and alkyltrimethylammonium chloride are used, in the following ratio of components, wt. %: Electrochemical Activated Anolyte 70-75 Hydrochloric acid 5-10 Orthophosphoric acid 3-5 Proxanol 7-9 Alkyltrimethylammonium chloride 4-8