SU857256A1 - Detergent for cleaning metallic surface - Google Patents

Description

one

 The invention relates to means for cleaning metal products from difficult-to-remove asphalt-tar contaminants, such as parts of internal combustion engines.

A detergent for cleaning a metal surface is known that contains trichlorethylene, a mixture of alkyl aryl sulfonic acid atrium salts, methylene chloride, disulfuric acid monoether disodium salt and water 1.

A water-based agent is known, which contains a hydrocarbon solvent, an oil-soluble corrosion inhibitor, zanolamine and / or morpholine fatty acid salt, sodium alkyl sulphostoxylate salt and primary alcohol 2.

It is also known detergent for cleaning a metal surface based on trichlorethylene, c6-; triazanol and oleate holding oleate, polyoxyethylene synthetic fatty alcohol, triethanolamine and methyl ethyl ketone 3.

However, this detergent is not sufficiently effective in relation to asphalt-tar soils and includes expensive and scarce solvent, trichlorethylene, as the main component.

The purpose of the invention is to increase the cleaning ability of the agent.

This goal is achieved by the fact that a detergent based on a halogen-containing hydrocarbon solvent containing polyoxyto. Ethylated synthetic fatty alcohol, anionic surfactant and triethanolamine, additionally contains ethylene glycol and caprolactam, it contains alkyl benzene sulfonate as an anionic surfactant, and as a halogen-containing hydrocarbon solvent, the agent contains distillation residues of chlorine ethylene in the following ratio, wt. % 11Lioc Si Leaded Synthetic Fatty Alcohol. 0.8-1.6

25

Alkylben olsulfonat 0,8-1,2 Caprolactam1-3

Triethanolamine1-1,5

Ethylene glycol, 1-3 Vat residues

30 trichlorethylene Else

Ethylene glycol provides the dissolution and stabilization of anionic surfactants in the bottoms of trichlorethylene.

Caprolactam and triethanolamine are introduced to reduce the corrosive effect of the detergent on ferrous and alloy parts and at the same time improve the washout of contaminants when rinsing with CMC aqueous solutions.

To ensure the high cleansing properties of the detergent, vat residues of trichlorethylene must contain 30-60% trichlorethylene, 2030% perchlorethylene and no more than 35% tetrachlorethylene and pentachloroethane. t

Comparative tests of the proposed composition and the known following compositions shown in Table 2 were carried out. one,

Table

Sintanol DS-10

Alkyl benzene sulfonate (melt)

Caprolactam

h

Triet Nolamin

Ethylene glycol

Triethanolamine oleate

Methyl ethyl ketone

Tr and X l ort t il

Trichlorethylene vat residues

A comparative assessment of the detergent detergent capacity was carried out with respect to the asphalt-resinous pollution of internal combustion engines (elements of coarse oil filters of the SY1-130 engines).

A cassette with five separately weighted filter elements (weight) is immersed in a glass with test detergents and held there without mechanical excitation at a temperature for 20 minutes, after this the elements are rinsed

Components 3 ICI, May.%

Private values

9v, 138,378,2 97,898,076,2 97,797,578,5 98,098,275,, 8

98,298,179,6 Average

96,0.98,078,0

0.8 1.2 1.6

1.75

0.75

1.75 0.55 Up to 100

100 to 100 to 100 by ten times immersion in water at a temperature and dried in a drying oven at a temperature. Filter elements are weighed (weight gfj) with an accuracy of 0 .0001 g, completely cleaned of washed contaminants, and again released (weight j.). -.

The results of cleaning the filter elements from asphalt-tar contaminants with detergents are given

in tab. 2

Claims (3)

Abtsyts Thus, the proposed detergent provides a higher (18.6-20%) degree of purification compared to limestone. In addition, in the detergent instead of expensive and clean solvent fractions, cheap bottoms of trichlorethylene are used. DETAILED DESCRIPTION OF THE INVENTION A detergent for cleaning a metal surface based on a halogen-containing hydrocarbon solvent containing polyoxyethylated synthetic synthetic fatty alcohol, an anionic surfactant and triethanolamine, in order to increase the cleaning ability, the product additionally contains ethylene glycol and caprolactam of the anionic surfactant HcJro, it contains an alkyl benzene sulfonate, and as a gaioid-containing hydrocarbon solvent contains distillation residues of trichlorethylene in the following ratio of components, wt.% “Polyoxyethylenated synthetic fat alcohol 0.8–1.6 Alkyl benzene sulfonate 0.8–1.2 Caprolactam 1–3 Triethanolamine 1–1.5 Ethylene glycol 1–3 Distillation of trichloroethylene, El , took into account in the examination 1. USSR author's certificate 392177, cl. C 11 D 1/12, 1970. 2. USSR author's certificate number 536220, CL. CUD 1/12, 1974. 3. Authors certificate of the USSR 414296, cl. C 11 D 1/20, 1971 (prototype).