RU2194748C1 - Detergent agent for metallic surface cleansing - Google Patents

Abstract

FIELD: detergents. SUBSTANCE: indicated detergent agent comprises the following components, wt. - %: soda ash, 51-64; sodium tripolyphosphate, 13-28; trisodium phosphate, 13-17; Neonol АФ_9-12, 2.4-3.6; Neonol АФ_9-6, 2.4-3.6, and alkylbenzene sulfoacid sodium salt, 0.4-0.6. Invention provides the enhancement of detergent capacity of and time of bath exploitation (in part, oil absorption) at relatively low temperature of degreasing with working solutions. Invention can be used for cleansing metallic surface from oily pollutions. EFFECT: enhanced effectiveness of detergent. 2 tbl

Description

 The invention relates to the field of detergents and can be used to clean the metal surface from oil pollution.

 Known detergents containing soda ash, sodium tripolyphosphate and surfactants - syntanol DT-7, alkyl sulfates, oxyphos B [Recommendations for the use of detergents for cleaning machines and parts for repair, M., GOSNITI, 1984, p.30] . The use of these tools to clean the metal surface from oil contamination is associated with the formation of a large amount of foam in the washing machine, which complicates the normal conduct of the process.

To reduce foaming, С ₇ -С ₁₂ alcohols were introduced into the well-known KM-1 detergent [Recommendations on the use of detergents for cleaning machines and parts during repair, M., GOSNITI, 1984, p.32]. The foaming ability of the drug is reduced, but at the same time the washing ability is reduced. The disadvantage of this tool is the use of scarce primary alcohols with a sharp unpleasant odor.

Closest to the invention in technical essence and the achieved result is a detergent for cleaning a metal surface containing soda ash, sodium tripolyphosphate and a nonionic surfactant mixture of neonols AF _9-12 and AF _9-6 [patent 2041927], in the following ratio of components, wt .%:
Neonol AF _9-12 - 3-4
Neonol AF _9-6 - 3-4
Sodium Tripolyphosphate - 15-52
Soda Ash - 29-45
Trisodium phosphate - 15-25
The disadvantages of the product include insufficiently high washing ability, high processing temperature and low operating time (working capacity) of working solutions.

 The objective of the invention is to develop such a detergent preparation for cleaning a metal surface, the use of which increases the washing ability and operating time of the bath (in particular, oil absorption), at a relatively low temperature degreasing with working solutions.

This object is achieved in that a detergent preparation containing soda ash, sodium tripolyphosphate, trisodium phosphate, ethoxylated monoalkylphenol based on propylene trimers, containing 12 mol of ethylene oxide in the molecule (Neonol AF _9-12 ), ethoxylated monoalkylphenol based on propylene trimers, 6 mol of ethylene oxide (Neonol AF _9-6 ), additionally contains the sodium salt of alkylbenzenesulfonic acid in the following ratio, in wt.%:
Soda Ash - 51-64
Sodium Tripolyphosphate - 13-28
Trisodium phosphate - 13-17
Ethoxylated monoalkylphenol based on propylene trimers containing 12 mol of ethylene oxide in a molecule (neonol AF _9-12 ) - 2.4-3.6
Ethoxylated monoalkylphenol based on propylene trimers containing 6 mol of ethylene oxide in a molecule (neonol AF _9-6 ) - 2.4-3.6
Alkylbenzenesulfonic acid sodium salt - 0.4-0.6
Moreover, the mass ratio of the mixture of nonionic surfactants (neanol AF _6-12 and AF _9-6 ) to the anionic surfactant (sodium salt of alkylbenzenesulfonic acid) is 12.

The selected combination of nonionic and anionic surface-active components in combination with inorganic alkaline salts allows you to provide a detergent
- a high degree of cleaning of the metal surface at a relatively low temperature degreasing;
- increase the operating time of the working solution, i.e. Efficiency and stability are maintained during the accumulation of a significant amount of contaminants (oil absorption).

 The solution of the detergent preparation can be applied to the metal surface both by spraying and by immersion.

 For the test, 5 formulations were compiled with different ratios of components.

 The detergent compositions were prepared by simple mechanical mixing of the incoming components, without any additional processing. (Bulk components were mixed in the container and a combination of liquid surfactants was applied to the dry mixture, mixed thoroughly). The prepared compositions were a fine crystalline white powder.

 The compositions of the known and proposed detergents are shown in table 1.

 The washing ability was determined by the gravimetric method according to the results of removal of industrial oil contaminants from the metal surface.

 The tests were carried out on 08KP steel samples with a size of 150x70 mm.

 Samples were thoroughly wiped twice with gasoline or white spirit, dried for 20 minutes in air, brought to a constant temperature in a desiccator, and weighed. The weighing result was recorded to the fourth decimal place.

 Pure samples were contaminated with brand 20 industrial oil, dipped in an oil vessel, then suspended and left in air for 24 hours to remove excess oil.

 Then the samples were weighed. The result of weighing in grams was recorded to the fourth decimal place.

Weighted steel samples were placed in a glass with a solution of the proposed and known detergent and kept at a temperature of 45-48 ^o C for 15 min, using the movement of the samples relative to the solution. After time, the defatted samples were removed from the solution, washed under a stream of tap water with a temperature of 15-20 ^o C for 0.5 min. After allowing excess water to drain, the samples were placed for several seconds in a vessel with ethanol and dried in an oven at a temperature of 100-110 ^o C. The samples were cooled to a constant temperature, first in air and then in a desiccator and weighed. The weighing result was recorded to the fourth decimal place.

где А - масса образца, загрязненного маслом, г;
В - масса образца, обезжиренного в моющем растворе, г;
С - масса образца после обезжиривания бензином или уайт-спиритом, г.The washing ability in% was determined by the formula

where A is the mass of the sample contaminated with oil, g;
B is the mass of the sample, defatted in the washing solution, g;
C is the mass of the sample after degreasing with gasoline or white spirit, g.

 The results of determining the indicator of washing ability are shown in table 2.

Oil consumption was determined by measuring the amount of oil that can be added to 1000 cm ^{3 of a} solution of a detergent preparation with a concentration of 15 g / dm ³ without deteriorating the washing ability.

 The results of the determination of the oil absorption are shown in table 2.

 As can be seen from the examples (see table 2, pr. 2, 3, 4), when the selected ratio of the components, the detergent preparation has a high washing ability when cleaning the metal surface from contamination of industrial oil, as well as high oil absorption.

 A change in the content of components above or below the declared limits (see table 2, etc. 1, 5) leads in one case to a decrease in washing ability, in another case to a decrease in oil absorption.

 Example 6 characterizes the washing ability and oil absorption of the prototype.

The use of the inventive detergent preparation will provide the following technical and economic benefits:
- high quality cleaning of the metal surface at a relatively low processing temperature;
- reduction of energy costs;
- increase the productivity of washing equipment and the operating time of the working bath;
- improvement of working conditions.

Claims (1)

Detergent for cleaning a metal surface containing soda ash, sodium tripolyphosphate, trisodium phosphate, ethoxylated monoalkylphenol based on propylene trimers, containing 12 mol of ethylene oxide in the molecule (Neonol AF _9-12 ), ethoxylated monoalkylphenol based on propylene trimers of 6 m containing ethylene oxide (Neonol AF _9-6 ), characterized in that it further comprises a sodium salt of alkylbenzenesulfonic acid in the following ratio of components, wt. %:
Soda Ash - 51-64
Sodium Tripolyphosphate - 13-28
Trisodium phosphate - 13-17
Ethoxylated monoalkylphenol based on propylene trimers containing 12 mol of ethylene oxide in a molecule (Neonol AF _9-12 ) - 2.4-3.6
Ethoxylated monoalkylphenol based on propylene trimers containing 6 mol of ethylene oxide in a molecule (Neonol AF _9-6 ) - 2.4-3.6
Alkylbenzenesulfonic acid sodium salt - 0.4-0.6
moreover, the mass ratio of the mixture of nonionic surfactants (Neonol AF _9-12 and Neonol AF _9-6 ) to the anionic surfactant (sodium salt of alkylbenzenesulfonic acid) is 12.

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