CZ1683U1 - Acid cleansing and disinfecting formulation - Google Patents

Description

Technical field

The technical solution relates to an acidic and disinfectant for cleaning and I parts and equipment in the brewing industry.

BACKGROUND OF THE INVENTION

Currently, there are extensive disinfectant acid preparations. Some of these products available on the market are highly aggressive, causing corrosion, such as nitric acid, formic acid, etc., others contain a number of harmful chemicals that have a negative impact on the environment and cause wastewater treatment problems.

The essence of the technical solution

The above mentioned disadvantages are eliminated by an acidic cleaning and disinfecting composition based on inorganic and organic acids and surfactants according to the technical solution which consists of 20 to 80% by weight. % inorganic acids, in particular phosphoric and sulfuric acids, 1 to 6 wt. % arenesulfonic acid, especially benzenesulfonic acid or toluene sulfonic acid, 0.01 to 1 wt. % surfactants, 15 to 80 wt. demineralized water having a total alkaline earth cation content of less than 100 pg / l; 0.05 to 0.1 wt. anticorrosive additives.

As surfactant, it contains ionic surfactants based on alkyl or

-2alkylarylsulphonic acids containing a C 12-12 alkyl chain or substituted with phenyl, or based on phosphoric acid partially esterified with a mixture of C 12 to C 18 alcohols with two to twelve ethylene oxide units attached and / or non-ionic surfactants such as ethylene oxide amines or alcohols or acids C C-C ^g having two to twelve ethylene oxide units.

0.05 to 0.1 wt.% May also be added to the formulation, if desired, to protect materials against corrosion attack. anticorrosive agents, for example mercaptobenzthiazole or benztriazole derivatives.

This preparation serves to neutralize alkaline impurities by dissolving mineral deposits, especially calcium, magnesium and iron salts, dissolving, emulsifying or suspending fats and proteins, while at the same time destroying the vast majority of microorganisms with high acidity. The present phosphoric acid is multifunctional because it destroys microorganisms, dissolves minerals and also acts as a corrosion inhibitor. The surfactants present increase the stability of the solid-particle dispersions and also serve as corrosion inhibitors for non-ferrous metals and rubber joints.

Demineralized water having a low alkaline earth content is used in the preparation of the formulation, which is particularly advantageous in plants where solid carbonate and oxalate deposits are expected to form.

The formulation according to the invention is composed of cheap and readily available raw materials and has high cleaning and disinfection efficiency, while low foaming properties make it easy to deploy on all machine parts in addition to static devices. Its effectiveness is significantly improved when combined with the appropriate alkaline cleaning and disinfectant. The preparation according to the technical solution is diluted before use with healthy water in a ratio of 3.5 liters to 200 liters of water. Cleaning and disinfection are carried out at 75 ° C for 20 minutes. After the operation is completed, the solution is drained and the device is rinsed with cold water.

- Example 1 g phosphoric acid (85% aqueous solution) g sulfuric acid concentrated

0,1 g of phosphoric acid ester of ethylene oxidized alcohol C1 _(J -Cjg ^with 2 and 12 ethylene oxide units)

0.05 g of benzentriazine

14.95 g demineralized water g toluenesulfonic acid »Example 2 g phosphoric acid (85% aqueous solution)

0.1 g of alkylaryl sulfonic acid containing

C 1 -C 12 alkyl substituted with phenyl

71.9 g of demineralized water

Example 3 g of sulfuric acid concentrated 0.1 g of alkylaryl sulfonic acid containing

C 1-6 alkyl substituted by phenyl

24.9 g of demineralized water

Example 4 g phosphoric acid (85% aqueous solution) g concentrated sulfuric acid

0.6 g of phosphoric acid ester of ethylene oxidized alcohol Οχo Cig with 2 and 12 ethylene oxidized units

0.3 g of alkylaryl sulfonic acid containing phenyl substituted C1-C20 alkyl

0.01 g ethylene oxide amines, alcohols, phenols having 8 to 18 carbon atoms, to which 2 to 12 ethylene oxide units are attached g benzenesulfonic acid 43.99 g water

-4The advantage of the newly formulated product has been proven on the basis of performed laboratory and operational tests in comparison with used products. The methodology used to evaluate the effectiveness of these preparations as used in the brewing industry was used in the evaluation.

Under operating conditions, 5 cleaning and disinfection attempts were performed with the formulation according to the invention and these results were compared with the formulation commonly used. Overall, the formulation according to the invention is more stable, better removes mechanical deposits, both of mineral and organic origin. In addition, the formulation is completely non-foaming at an operating temperature of 75 ° C, so there are no complications when pumping through the device and discharging it. It has also been found by a similar microscopic examination of selected metal parts from the entire apparatus that the preparation has a higher passivating effect, in particular against pitting. This is especially important where there is a high content of chloride ions in washing waters. The results of the microbial examination from 5 experiments are shown in Table 4.1. Table 1

Number of yeasts and microorganisms per ml of the last rinse water during sanitation of the fermenting plant after the wort cooler using the preparation according to the invention and a commonly used preparation without prior application of the alkaline preparation.

Experiment No. The formulation according to the invention / conventional formulation, calculated per ml from 50 ml of the last rinsing water

yeast dairy koli 1 0/0 0/0 0.1 / 0.3 2 0/0 0/0 0.2 / 0.5 3 0.13 / 0.36 0/0 0/0 4 0 / 0.1 0 / 0.1 0.1 / 0.4 5 0 / 0.1 0 / 0.1 0/0

-5toxicity higher than

Based on the 5 sanitations carried out with the preparation according to the technical solution, it can be said that its consumption with the same effect is about a third lower than with the use of conventional means, which significantly affects the economy of disposal of its residues in waste water. Also the microorganism is a composition.

In addition, tissue toxicity (1-4), changes in pH of the formulations after 120 days of storage under operating conditions, and corrosion to various materials (rubber, iron, aluminum, coatings and ceramic materials) were monitored and compared. The results are summarized in Table 2.

compared to the yeasts of interest, this is the case with commonly used yeast

Table 2

Selected characteristics of tested products

Composition Tissue Toxicity% pH change Corrosive property

Acid composition of the invention

Commonly used

I means 25 10

It can be seen from the table that in the above-mentioned parameters the properties of the acid preparation according to the invention are comparable to those used up to now.

Industrial applicability

The technical solution can be used for cleaning equipment in the food industry.

and machine disinfection

Claims (1)

PROTECTION REQUIREMENTS An acidic disinfectant based on inorganic and organic acids and surfactants, characterized in that it contains 20 to 80% by weight. % inorganic acids, in particular phosphoric and sulfuric acids, 1 to 6 wt. % arenesulfonic acid, in particular benzenesulfonic or toluene sulfonic acid, 0.01 to 1 wt. % surfactants, 15 to 80 wt. demineralized water having a total alkaline earth cation content of less than 100 pg / l; 0.05 to 0.1 wt. anticorrosive additives. AND Composition according to claim 1, characterized in that the surfactant is ionic surfactants based on alkyl- or alkylarylsulphonic acids containing a C 1 -C ₁₂ alkyl chain or substituted by phenyl, or on the basis of phosphoric acid partially esterified with a C 1 -C 2 mixture. - g of alcohols with two to twelve ethylene oxide units attached. The composition according to claims 1 and 2, characterized in that it contains nonionic surfactants such as ethylene-oxidized amines or alcohols or acids having a carbon number of C 8 to C 8 g which have two to twelve ethylene oxide units as surfactant. The composition of claims 1-3 wherein _R in that as corrosion inhibitors comprising derivatives of benzotriazole or mercaptobenzothiazole. • nad J IN 10IN1S VIA O Η 3Λ 0 *. S ΛΙΛ) Q'dci