RU2472851C1 - Detergent for dairy equipment (shms-5) - Google Patents

Abstract

FIELD: food industry.

SUBSTANCE: detergent for diary equipment relates to liquid detergents and can be used to wash pipeline milkers and milking equipment at diary farms. The detergent contains the following, wt %: potassium hydroxide 3.0-12.0; sodium metasilicate 3.0-12.0; sodium tripolyphosphate 3.0-12.0; C₄-C₁₀ alkyldimethylamine oxides 2.0-5.0; C₄-C₁₀ alkylpolyglucosides (average degree of oligomerisation of 1.5-1.7) 2.0-5.0; oxyethylidenediphosphonic acid 1.0-5.0; calcium citrate 1.0-8.0; water - up to 100.

EFFECT: liquid alkaline detergent having improved washing and cleaning properties in water of high hardness, with low temperature conditions of washing the equipment, without foaming.

Description

The invention relates to liquid detergents and can be used for washing milking installations with a milk pipe, dairy equipment at dairy farms.

Known detergent "MSZH-3SM" according to copyright certificate 1509396, class. C11D 3/14, containing wt.%: Polyoxyethylene glycol ether of monoethanolamides synthetic fatty acids of a fraction of C ₁₀ -C ₁₆ - 8; sodium tripolyphosphate - 30-45; sodium metasilicate - 8-20; sodium sulfate - 3-15; wettable colloidal sulfur - 1-5; soda ash up to 100 (SU 1509396). Detergent has high operational characteristics, but is not applicable in conditions of CIP-washing of dairy equipment, which requires liquid detergents.

Closest to the claimed tool composition is a liquid detergent for processing dairy equipment (Katril according to patent No. 2159591, class C11D 3/20, C11D 3/33, C11D 3/04, C11D 3/08, 1999), containing wt.%: alkali metal hydroxide 1.0-2.0; sodium metasilicate 5.0-6.5; surfactant 2.5-7.0; ethylenediaminetetraacetic acid sodium salt 6.0-7.0; monohydroxy alcohol of 0.5-1.5; water up to 100.

The detergent has high performance, but is not effective when washing with water of increased hardness.

The objective of the invention is the creation of a new alkaline liquid detergent that provides high washing and cleaning properties in water of increased hardness, with low-temperature washing conditions of the equipment, with no foaming.

This object is achieved in that the detergent for dairy equipment, including alkali, surface-active substances (surfactants), sodium metasilicate, sodium tripolyphosphate, additionally contains hydroxyethylenediphosphonic acid and potassium citrate, and as a surfactant - C ₈ -C ₁₀ fraction alkyldimethylamino oxides, alkyl polyglucosides, C ₄ -C ₁₀ alkyl fractions (average degree of oligomerization 1.5-1.7), in the following ratio of components, wt.%:

potassium hydroxide 3.0-12.0; sodium metasilicate 3.0-12.0; sodium tripolyphosphate 3.0-12.0; alkyldimethylamino oxides fraction C ₈ -C ₁₀ 2.0-5.0; alkyl polyglucosides, C ₄ -C ₁₀ alkyl fractions (average degree of oligomerization of 1.5-1.7) 2.0-5.0; hydroxyethylenediphosphonic acid 1.0-5.0; potassium citrate 1.0-8.0; water up to 100.

In the formulation, alkyl dimethylamino oxides of the C ₈ -C ₁₀ -2.0-5.0 fraction are used as surfactants; as well as alkyl polyglucosides, C ₄ -C ₁₀ alkyl fractions (average degree of oligomerization 1.5-1.7) - 2.0-5.0.

Alkyl dimethylamino oxides as nonionic surfactants, for example, in particular Admox SC-1885 manufactured by Albemarle Corporation, Amoro B-W of AkzoNobel Company, are used in the manufacture of cosmetic, hygiene and cleaning products.

Alkyl polyglucosides as completely biodegradable nonionic surfactants, for example, in particular, “Simusol SL4” from the company “Seppic”, “Glucopon” from the company “Clariant” (Clariant) are widely used in household and industrial detergents as hydrotopes and wetting agents .

Nonionic surfactants do not create ions in aqueous solutions and, therefore, have important advantages: they are absolutely immune to water hardness, demonstrate high efficiency even at low concentrations and low washing temperatures, do not form a lot of foam and prevent the resorption of contaminants on the equipment surface. These surfactants are biodegradable and environmentally friendly.

Oxyethylenediphosphonic acid (TU 6-09-5372-87) is used to bind water hardness salts.

Potassium citrate is used as an additional substance that forms less stable complexes with water hardness salts than sodium citrate and, therefore, contributes to a more rapid transfer of water hardness salts from the equipment surface to the washing solution.

Sodium tripolyphosphate is used to increase the dispersing ability of the washing solution (Pironyan V.Kh., Grin V.T. Technology of synthetic detergents. M: - “Chemistry”, 1984, p.19).

The invention is illustrated by the following examples.

Example 1

3 kg of caustic potassium, 3 kg of sodium metasilicate, 1 kg of hydroxyethylenediphosphonic acid, 2 kg of C ₈ -C ₁₀ alkyldimethylamino oxides, 2 kg of alkyl polyglucosides, C ₄ -C ₁₀ alkyl fractions (average degree of oligomerization of 1.5-1.7) are mixed , 1 kg of potassium citrate, 3 kg of sodium tripolyphosphate, the rest is water.

Example 2

12 kg of potassium hydroxide, 12 kg of sodium metasilicate, 5 kg of hydroxyethylenediphosphonic acid, 5 kg of C ₈ -C ₁₀ alkyldimethylamino oxides, 5 kg of alkyl polyglucosides, C ₄ -C ₁₀ alkyl fractions (average degree of oligomerization of 1.5-1.7) are mixed , 8 kg of potassium citrate, 12 kg of sodium tripolyphosphate, the rest is water.

Example 3

Mix 8 kg of potassium hydroxide, 8 kg of sodium metasilicate, 3 kg of hydroxyethylenediphosphonic acid, 3 kg of C ₈ -C ₁₀ alkyldimethylamino oxides, 3 kg of alkyl polyglucosides, C ₄ -C ₁₀ alkyl fractions (average degree of oligomerization 1.5-1.7) , 5 kg of potassium citrate, 9 kg of sodium tripolyphosphate, the rest is water.

These intervals of the ratios of the components in the formulation are sufficient to achieve the objectives of the invention. If you violate them in the direction of reduction, the effectiveness of the formulation ceases to meet the objectives, and if you increase it, it leads to cost overrun of the components of the composition, increase the cost of detergent and reduce the economic efficiency of the washing process as a whole. Only a combination of the claimed components in certain proportions allows to achieve the effect specified in the objectives of the invention.

The claimed tool meets the condition of patentability "inventive step", in particular, the combination of surfactants with hydroxyethylenediphosphonic acid and potassium citrate, taken only at certain ratios of components, allowed to obtain a technical effect that meets the objectives of the invention.

Detergent is prepared as follows. Water is poured into a container equipped with a water jacket and a stirrer, with the stirrer turned on, hydroxyethylenediphosphonic acid and potassium citrate are loaded, while hot water is supplied to the shirt to warm the mixture to 60-65 ° C and mix for 3-4 minutes, then injected superficially -active substances: alkyldimethylamino oxides and alkyl polyglucosides, potassium hydroxide, sodium metasilicate, sodium tripolyphosphate in the proportions indicated in the formula. After which the composition is cooled to room temperature and filtered.

Detergent is a clear solution with a slight yellow tint, density 1160 kg / m ³ ; at a concentration of 10 g / l (1% by weight), the detergent solution has a pH of 11.7 and a surface tension of 57.5 × 10 ^-3 n / m; which ensures the necessary quality of equipment washing. The transparency, delamination, clouding, smell and alkalinity of these formulations remain constant for 6 months.

Studies of the washing action (cleaning ability) of detergent solutions were carried out in a laboratory setup developed by G. Degterev. in MIISP them. V.P. Goryachkina. The installation, which is a container in the form of a cylinder with a volume of 1.2 l, with mechanical stimulation of the washing solution, which provides the specified temperature and comparability of the test conditions.

Unsalted butter (GOST 3791) is used as model contaminants. Samples are polished plates of food grade stainless steel measuring 5 × 35 × 2 mm.

Before applying model contamination, experimental samples are thoroughly washed in a hot solution (T = 60 ° C) of an alkaline detergent using a hair brush. The samples are rinsed with distilled water in two successively installed containers, dried between two sheets of filter paper, degreased with acetone and heated on a metal sheet to a temperature of 50 ° C.

The pollutant melted in a water bath at a temperature of 50 ° C, with a uniform layer in an amount of 0.25 g is applied using a soft spatula on the surface of the sample on one side. After this, the contaminated sample is placed on a metal sheet heated to 50 ° C and maintained for 30 minutes to evenly distribute the plate contaminant and better adhesion of the pollution to the surface. Then the sample is cooled to room temperature, as a result of which the oil solidifies in an even layer.

The cleaning ability of the solutions was evaluated by the mass of residual contamination of the sample with a model contaminant after cleaning with a washing solution by the gravimetric method. The experimental samples were weighed on a Vibra HTR-80E analytical balance (special (I) accuracy class, GOST 24104-2001). The residual contamination of sample M, expressed in grams per unit surface area (g / m ² ), was determined by the ratio of the difference between the mass of the sample after cleaning m ₁ and the mass of the pure sample m to surface area S by the formula

M = (m ₁ -m) / S.

Water of different hardness was prepared as follows: CaCl ₂ (80%) and MgCl ₂ (20%) were added to distilled water, which corresponds to the norm of the proportion of calcium and magnesium cations in natural waters of medium and high hardness. Hardness is expressed in mmol / L (mol / m ³ ).

The experiments were carried out in five replicates at a temperature of a washing solution of 40 ° C, a concentration of detergent 10 g / l, a cleaning time of 3 minutes, using water with a hardness of 0; four; 7; 12 mmol / L. The test results are shown in table 1.

Table 1 Detergent Name Residual surface contamination, g / m ² Hardness, 0 mmol / L Hardness, 4 mmol / L Hardness, 7 mmol / L Hardness, 12 mmol / L SHMS-5 (example 1) 0.10 0.15 0.25 0.35 SHMS-5 (example 2) 0.08 0.12 0.20 0.35 SHMS-5 (example 3) 0.10 0.15 0.25 0.35 Katril 0.10 0.20 0.35 0.55 MSZH-3SM 0.20 0.35 0.50 0.75

As can be seen from table 1, the solutions of the proposed detergent SchMS-5 provide a more effective cleaning of the surface from milk contaminants in water of increased hardness at the lowest temperature allowed when CIP-cleaning equipment, 40 ° C.

The use of the proposed detergent for cleaning dairy equipment provides a high degree of purity of their working surfaces, in particular when using water of increased hardness and low-temperature washing conditions of the equipment. The absence of foaming in this detergent allows it to be effectively used in the CIP-washing of dairy equipment.

Claims (1)

Detergent for dairy equipment (SHMS-5), including alkali, surface-active substances (surfactants), sodium metasilicate, sodium tripolyphosphate, characterized in that it additionally contains hydroxyethylenediphosphonic acid and potassium citrate, and C ₈ fraction as a surfactant, alkyldimethylamino oxides -C ₁₀ , alkylpolyglucosides, alkyl fractions C ₄ -C ₁₀ (average degree of oligomerization of 1.5-1.7) in the following ratio, wt.%:
potassium hydroxide 3.0-12.0 sodium metasilicate 3.0-12.0 sodium tripolyphosphate 3.0-12.0 alkyldimethylamino oxides fraction C ₈ -C ₁₀ 2.0-5.0 alkyl polyglucosides, C ₄ -C ₁₀ alkyl fractions (average degree of oligomerization of 1.5-1.7) 2.0-5.0 hydroxyethylenediphosphonic acid 1.0-5.0 potassium citrate 1.0-8.0 water up to 100