JP5292140B2 - CIP cleaning composition and cleaning method using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a detergent composition for CIP which is excellent in detergency performance against organic stains, such as heat denaturation stain originated from food or beverage ingredients, dispersibility of inorganic substance, low-foamability, storage stability, and stability of available chlorine, as well as suppression of colloid precipitation and prevention of blackening of stainless steel surface, and to provide a washing method using the detergent composition for CIP. <P>SOLUTION: The detergent composition for CIP contains, by mass, (A) 5-30% of an alkali metal hydroxide salt, (B) 0.5-5% of chlorine oxidant, (C) 1-7% of silicate, (D) 0.5-7% of phosphonate, (E) 0.1-5% of amphoteric surfactant, and water as an (F) component, wherein a blending ratio [(C):(D)] of component (C), silicate to component (D), phosphonate is 3:1-1:3. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a cleaning composition for CIP used for cleaning a production line of beverages such as milk beverages, fruit juice beverages, beer and dairy products, processed foods, seasonings, and the like, and a cleaning method using the same. .

  Conventionally, chlorine-based cleaning agents in which a chlorine-based oxidizing agent having a high cleaning effect is mixed with an alkali metal hydroxide salt have been used against strong dirt on tanks, piping, filling machines and the like of manufacturing facilities in food factories. For example, JP-A-63-130576 discloses a cleaning composition for CIP in which an amine oxide, a halogen source, a metal sequestering agent and an alkali source are blended (see Patent Document 1). In such a cleaning composition for CIP, although the components of beverages and foodstuffs have good detergency against organic stains such as stains (hereinafter referred to as “heat-modified stains”) that are heated and modified in the sterilizer part, There has been a problem that the stainless steel surface to be cleaned by the chlorine-based oxidizing agent is blackened.

  Therefore, in order to prevent blackening of the surface of the stainless steel surface to be cleaned by the chlorinated oxidant, it has been proposed to prevent corrosion of the stainless steel surface by adding silicate. For example, JP-A-9-31494 discloses a detergent composition in which a silicate is blended with a combination of a hypochlorite, a sequestering agent, an alkali hydroxide and a nonionic surfactant ( (See Patent Document 2).

However, since the silicate in the composition combines with hardness components such as calcium and magnesium in the water used for cleaning detergent dilution, and generates a large amount of silicate colloid in the cleaning diluent, It has been a problem to cause clogging of the filter and to cause trouble of circulation cleaning in CIP cleaning.
In addition, a large amount of inorganic material derived from dairy products adheres to the manufacturing equipment after manufacturing the dairy product, and there is a problem that poor cleaning occurs if the dispersibility of the inorganic material is insufficient. Further, in the CIP cleaning, if the cleaning agent diluent is excessively foamed, the cleaning agent diluent does not come into sufficient contact with the surface to be cleaned, resulting in poor cleaning.

JP-A-63-130576 JP 9-31494 A

  The present invention has been made in view of such circumstances, and is capable of cleaning organic soil such as heat-denatured soil derived from food or beverage components, inorganic dispersibility, low foamability, storage stability, and effective chlorine stability. An object of the present invention is to provide a cleaning composition for CIP, which is excellent in properties, in particular, is excellent in inhibiting colloidal precipitation and preventing blackening of the stainless steel surface, and a cleaning method using the same.

As a result of intensive studies to solve the above-mentioned problems, the present inventors contain the following components (A) to (E) as active ingredient amounts in the following ratio with respect to the entire composition, and (F) It contains water as a component, and the mixing ratio [(C) :( D)] of the silicate of component (C) and the phosphonate of component (D) is 3: 1 to 1 in the composition. : A CIP cleaning composition of 3 was found.
(A) Alkali metal hydroxide 5-30 mass%,
(B) 0.5 to 5% by mass of a chlorine-based oxidant,
(C) 1-7% by mass of silicate,
(D) 0.5-7 mass% phosphonate,
(E) Amphoteric surfactant 0.1-5 mass%.

  In addition, the present inventors eat and drink a detergent diluent obtained by diluting the detergent composition for CIP with water to a concentration of 0.5 to 10% by mass at a temperature of 10 to 90 ° C. for 10 to 60 minutes. A method of circulating and washing in a product production line, or a detergent diluent diluted with water to a concentration of 0.01 to 10% by mass at a temperature of 10 to 60 ° C. for 0.1 to 24 hours We have found a method of filling and cleaning the product production line.

That is, the present invention contains the following components (A) to (E) as effective component amounts in the following ratio with respect to the entire composition, water as component (F), and component (C): The cleaning composition for CIP in which the blending ratio [(C) :( D)] of the silicate of (D) and the phosphonate of the component (D) is 3: 1 to 1: 3 in the composition is the first. The gist of
(A) Alkali metal hydroxide 5-30 mass%,
(B) 0.5 to 5% by mass of a chlorine-based oxidant,
(C) 1-7% by mass of silicate,
(D) 0.5-7 mass% phosphonate,
(E) Amphoteric surfactant 0.1-5 mass%.

  Especially, let the amphoteric surfactant of the said (E) component be the said 2nd summary for the said cleaning composition for CIP whose alkylamine oxide is.

  Moreover, the cleaning agent dilution liquid which diluted the cleaning composition for CIP of the said summary 1 or 2 with water to the density | concentration of 0.5-10 mass% is 10-10 minutes at the temperature of 10-90 degreeC, and is eaten / drinked. The third gist is a method of circulating and cleaning the product production line.

  And the cleaning agent dilution liquid which diluted the cleaning composition for CIP of the said summary 1 or 2 to 0.01-10 mass% density | concentration with water at the temperature of 10-60 degreeC for 0.1 to 24 hours A method for filling and washing a food / beverage product production line is a fourth aspect.

  The CIP cleaning composition of the present invention has the advantages of being excellent in cleaning of organic soil such as heat-modified soil derived from food or beverage components, dispersibility of inorganic matter, low foamability, storage stability and stability of effective chlorine. Have. In particular, the colloidal precipitation in the diluted diluent of the detergent is suppressed by blending the blending ratio of the silicate and the phosphonate so as to be in the range of 3: 1 to 1: 3 in the detergent composition. Moreover, it has the advantage that the cleaning composition for CIP excellent in the blackening prevention property of the stainless steel surface can be provided.

  In addition, by using the CIP cleaning composition, there is an advantage that a cleaning method that does not cause clogging or poor cleaning of the filter in the vicinity of the filling machine can be provided in the food and beverage production line.

  Next, an embodiment for carrying out the present invention will be described in detail.

  In the present invention, the term “food / beverage product production line” means equipment for producing food / beverage products, and includes production tanks, piping, filling machines, and the like.

  Examples of the alkali metal hydroxide (A) used in the CIP cleaning composition of the present invention (hereinafter sometimes referred to as “the present cleaning composition”) include sodium hydroxide, potassium hydroxide, and water. Examples thereof include lithium oxide. These may be used alone or in combination of two or more. Of these, sodium hydroxide and potassium hydroxide are preferable from the viewpoint of economy.

  The alkali metal salt of the component (A) is blended in the range of 5 to 30% by mass, preferably 10 to 20% by mass in the present cleaning composition. If it is less than 5% by mass, the detergency is poor, and if it exceeds 30% by mass, the storage stability is poor.

  As the chlorine-based oxidizing agent (B) used in the cleaning composition of the present invention, hypochlorites such as sodium hypochlorite and potassium hypochlorite, chlorinated isocyanurate, chlorination Chlorinated isocyanurates such as potassium isocyanurate, chlorites such as sodium chlorite and potassium chlorite, chlorates such as sodium chlorate and potassium chlorate, sodium perchlorate and potassium perchlorate Perchlorate. These may be used alone or in combination of two or more. Of these, sodium hypochlorite is preferable from the viewpoint of economy.

  The chlorine-based oxidizing agent of the component (B) is blended in the range of 0.5 to 5% by mass, preferably 1 to 3% by mass in the present detergent composition, and if it is less than 0.5% by mass, it is detergency. If the blending amount exceeds 5% by mass, the blackening of the stainless steel is generated and promoted, which is not preferable. The chlorine-based oxidizer is blended for the purpose of decomposing and removing organic soils well and disinfecting and bleaching.

  As the silicate of the component (C) used in the present cleaning composition of the present invention, sodium silicate, metasilicate of potassium metasilicate, orthosilicate such as sodium orthosilicate and potassium orthosilicate, sodium silicate And water glass such as potassium silicate. These may be used alone or in combination of two or more. Of these, sodium metasilicate is preferred from the viewpoint of storage stability.

  The silicate of the component (C) is blended in the range of 1 to 7% by mass, preferably 1 to 4% by mass in the present cleaning composition. If it is less than 1%, the blackening of stainless steel is promoted, which is not preferable. If it exceeds 7%, the anti-colloidal precipitation preventing property in a diluted solution obtained by diluting the present cleaning composition with water becomes poor.

  The phosphonate of component (D) used in the present cleaning composition of the present invention includes phosphonobutane tricarboxylic acid, hydroxyethylidene diphosphonic acid, aminotrimethylene phosphonic acid, diethylenetriamine pentamethylene phosphonic acid, phosphonobutane tricarboxylic acid. Sodium phosphate, potassium phosphonobutanetricarboxylate, sodium hydroxyethylidene diphosphonate, potassium hydroxyethylidene diphosphonate, sodium aminotrimethylenephosphonate, potassium aminotrimethylenephosphonate, sodium diethylenetriaminepentamethylenephosphonate, diethylenetriaminepentamethylenephosphonic acid Potassium etc. are mentioned. These may be used alone or in combination of two or more. Of these, sodium phosphonobutanetricarboxylate is preferred from the viewpoint of dispersibility of inorganic substances.

  The phosphonate of the component (D) is blended in the range of 0.5 to 7% by mass, preferably 1 to 4% by mass in the present detergent composition, and the inorganic dispersibility is less than 0.5% by mass. In addition, when it exceeds 7% by mass, the stability of effective chlorine concentration is poor.

  Here, the blending ratio [(C) :( D)] of the (C) silicate and (D) phosphonate is in the range of 3: 1 to 1: 3, preferably 3: 1 to 1: A range of 2 is preferable from the viewpoint of colloidal precipitation prevention and effective chlorine stability. In this cleaning composition, when the blending ratio of (C) silicate and (D) phosphonate [(C) :( D)] is greater than 3: 1, the colloidal precipitation prevention property of the diluted solution becomes poor. Moreover, if this ratio is less than 1: 3, the stability of effective chlorine is remarkably lowered, which is not preferable.

  Examples of the (E) component amphoteric surfactant used in the cleaning composition of the present invention include alkylamine oxides having 8 to 18 carbon atoms in the alkyl group or alkylene group. These may be used alone or in combination of two or more. Of these, alkylamine oxides having 8 to 14 carbon atoms are preferred from the viewpoint of low foamability.

  The amphoteric surfactant of the above component (E) is blended in the range of 0.1 to 5% by mass, preferably 0.3 to 3% by mass in the present cleaning composition. If it is less than 0.1% by mass, the detergency is poor, and if it exceeds 5% by mass, the stability of effective chlorine is remarkably lowered, which is not preferable.

  Examples of the water of the component (F) used in the cleaning composition of the present invention include tap water, distilled water, pure water, and ion exchange water. These may be used alone or in combination of two or more. Of these, ion-exchanged water is preferably used from the viewpoint of economy and storage stability.

  The water of the above component (F) is the sum of water contained in the form of water derived from the components constituting the cleaning composition and water added from the outside, and the entire cleaning composition is A balance amount is blended so as to be 100% by mass.

  And as a washing | cleaning method of this invention, the washing | cleaning agent dilution liquid which diluted the cleaning composition for CIP of this invention to the density | concentration of 0.5-10 mass% with water is 10-90 degreeC in temperature, 10 A method of circulating and washing in a production line for food and drink for 60 minutes and a detergent diluent obtained by diluting the CIP detergent composition of the present invention with water to a concentration of 0.01 to 10% by mass is 10 It is carried out at a temperature of ˜60 ° C. for 0.1 to 24 hours by filling and washing the food / beverage product production line.

  Next, examples will be described and described together with comparative examples. In addition, this invention is not restrict | limited to these Examples.

  Sample cleaning compositions having compositions of Examples 1 to 18 and Comparative Examples 1 to 12 shown in Tables 1 to 3 below (units of numerical values in each table are% by mass) were prepared, and organic stains were removed. Seven items were tested and evaluated: detergency, inorganic dispersibility, anti-blackening of stainless steel surface, colloidal precipitation inhibitory effect of diluting liquid, low foamability, storage stability, and effective chlorine stability. The amount of each component in the table below is shown as the amount of active ingredient. The effective component amount (% by mass, hereinafter abbreviated as%) of each component used in the present invention is shown below. The results of various tests are also shown in Tables 1 to 3 below. The test methods and evaluation criteria for the above test items are as shown below.

[Component (A)]
-Sodium hydroxide product name "Liquid caustic soda 48%" (Asahi Glass Co., Ltd., active ingredient amount 48%)
-Potassium hydroxide product name "48% caustic potash" (Asahi Glass Co., Ltd., active ingredient amount 48%)

[(B) component]
-Sodium hypochlorite product name "Sodium hypochlorite" (Asahi Glass Co., Ltd., active ingredient amount 12%)

[Component (C)]
-Sodium metasilicate product name "Metasilicate sodium 9 hydrate" (Made by Koei Chemical Industry Co., Ltd., active ingredient amount 41%)
・ Sodium orthosilicate product name “Neo Ortho 65” (manufactured by Koei Chemical Industry Co., Ltd., active ingredient amount 65%)

[Component (D)]
・ Phosphonobutanetricarboxylic acid trade name “Baihibit AM” (manufactured by Bayer, 50% active ingredient)
・ Hydroxyethylidene diphosphonic acid trade name “Cyrest PH-210” (manufactured by Kyrest, 60% active ingredient)

[(E) component]
・ Alkylamine oxide (C8)
Octyldimethylamine oxide Brand name “Genaminox OC” (manufactured by Clariant Japan, 30% active ingredient)
・ Alkylamine oxide (C14)
Tetradecyldimethylamine oxide Trade name “Genaminox MY” (manufactured by Clariant Japan, 23% active ingredient)

1. Detergency of organic soil [Test method]
(1) Preparation of test piece Beverage (coffee beverage: trade name: “Meito Coffee”, Kyodo Co., Ltd.) on the surface center part (3 cm x 1.7 cm) of a clean stainless steel plate (SUS304: 8 cm x 5 cm) Daimler Co., Ltd.) was applied in an oval shape in an amount equivalent to 0.1 g / sheet, and adjusted by heating at 125 ° C. for 8 hours.
(2) Operation method Beverage-heat-denatured soil test pieces are immersed for 15 minutes in a detergent diluent (heated to 80 ° C) obtained by diluting various test detergent compositions to 3% by mass with tap water. The test piece was rinsed with tap water and allowed to air dry at room temperature. The weight change of the test piece before and after cleaning at this time was measured, the cleaning rate was calculated by the following formula, and the cleaning property of the organic soil was determined according to the following evaluation criteria.
Cleaning rate (%) = ((weight of test piece before washing−weight of test piece after washing) / (weight of test piece before washing−weight of clean test piece)) × 100
〔Evaluation criteria〕
○: Cleaning rate of 80 to 100%,
Δ: Cleaning rate of 60 to less than 80%,
X: Cleaning rate of less than 60%,
And ○ was determined to be practical.

2. Dispersibility of inorganic substances (test method)
100 ml of a 100 ml-capacity measuring graduated solution of various cleaning detergent compositions diluted to 3% by mass with tap water, placed in a 70 ° C. warm bath for 10 minutes, and then used as an inorganic substance 10 g (excess amount) of calcium phosphate was added, the stoppered graduated cylinder was taken out and shaken up and down 10 times. And 30 minutes after completion | finish of shaking, the dispersion state of the inorganic substance in a solution was observed visually, and the following evaluation criteria determined.
〔Evaluation criteria〕
○: inorganic substance is well dispersed,
Δ: inorganic substance is dispersed,
X: inorganic substance is not dispersed,
And ○ and Δ were determined to be practical.

3. Stainless steel surface blackening prevention [test method]
A clean test piece (manufactured by SUS304: length 8 cm × width 5 cm) was immersed for 40 hours in a detergent diluent (heated to 80 ° C.) obtained by diluting various test detergent compositions to 3% by mass with tap water. After immersion, the sample was rinsed thoroughly with tap water, and the condition of the stainless steel surface after natural drying at room temperature was visually observed and judged according to the following evaluation criteria.
〔Evaluation criteria〕
○: Blackening is not recognized (equivalent to a clean test piece),
Δ: Slight blackening is observed,
X: Remarkable blackening is observed,
And ○ and Δ were determined to be practical.

4). Inhibition of colloidal precipitation (test method)
Detergent diluents obtained by diluting various test detergent compositions to 3% by mass using the following artificial hard water having a total hardness of 150 mg / L were heated at 80 ° C. for 2 hours. The state of occurrence of colloidal precipitation in the detergent diluent at this time was visually observed and judged according to the following evaluation criteria.
[Adjustment of artificial hard water]
177 mg of calcium chloride dihydrate and 81.6 mg of magnesium chloride hexahydrate were weighed and dissolved in ion exchange water to make 1000 ml.
〔Evaluation criteria〕
○: Colloidal precipitation is not observed,
Δ: Slight colloidal precipitation is observed,
X: A large amount of colloidal precipitation is observed,
And ○ and Δ were determined to be practical.

5. Low foaming property [Test method]
50 ml of a diluted detergent solution obtained by diluting various test detergent compositions with tap water to 3% by mass is placed in a 100 ml-capacity measuring graduated cylinder and placed in a 70 ° C. hot bath for 10 minutes, and then the stoppered The graduated cylinder was taken out and shaken up and down 10 times. Then, the amount of foam (ml) immediately after the end of shaking was measured and judged according to the following evaluation criteria.
〔Evaluation criteria〕
○: The amount of foam is less than 10 ml. Δ: The amount of foam is 10 ml or more and less than 20 ml. X: The amount of foam is 20 ml or more, and ○ and Δ are determined to be practical.

6). Storage stability [Test method]
50 ml of various test detergent compositions were placed in a 50 ml polypropylene container and sealed, and one container was placed at each temperature of −5 ° C., 20 ° C., and 40 ° C. And after arrangement | positioning for 1 month, the presence or absence of precipitation in this test detergent composition and the state of the presence or absence of isolation | separation were observed visually, and the following evaluation criteria determined.
〔Evaluation criteria〕
○: neither precipitation nor separation is observed,
Δ: Slight precipitation or separation is observed,
X: Precipitation or separation was clearly recognized,
And ○ was determined to be practical.

7). Stability of effective chlorine 50ml of various test detergent compositions were sealed in a 50ml polypropylene container, and the residual ratio (%) of effective chlorine was measured when stored at 20 ° C for 1 month. The determination was made according to the following evaluation criteria.
〔Evaluation criteria〕
○: Residual rate of available chlorine is 80% or more,
Δ: Residual rate of available chlorine is less than 60 to 80%,
X: Residual rate of available chlorine is less than 60%,
And ○ and Δ were determined to be practical.

  From the results shown in Tables 1 and 2, the CIP cleaning compositions of Examples 1 to 18 are organic soil detergency, inorganic dispersibility, stainless steel surface blackening prevention, colloidal precipitation inhibition, low foam It can be seen that it has excellent performance in all the evaluation items of stability, storage stability and stability of available chlorine.

  Comparative Example 11 is an example in which the ratio of phosphonate is lower than the mixing ratio of silicate and phosphonate, and it can be seen that the inhibitory effect on colloidal precipitation is lacking.

  Comparative Example 12 is an example in which the proportion of silicate is lower than the ratio of silicate and phosphonate, and it can be seen that the stability of effective chlorine is lacking.

Claims (4)

The following components (A) to (E) are contained in the following proportions as an active ingredient amount with respect to the whole composition, and water is contained as the component (F), and the silicate of the component (C) and A cleaning composition for CIP, wherein the blending ratio [(C) :( D)] of component (D) with phosphonate is 3: 1 to 1: 3 in the composition.
(A) Alkali metal hydroxide 5-30 mass%,
(B) 0.5 to 5% by mass of a chlorine-based oxidant,
(C) 1-7% by mass of silicate,
(D) 0.5-7 mass% phosphonate,
(E) Amphoteric surfactant 0.1-5 mass%.   The CIP cleaning composition according to claim 1, wherein the amphoteric surfactant of the component (E) is an alkylamine oxide.   A cleaning agent diluted solution obtained by diluting the CIP cleaning composition according to claim 1 or 2 with water to a concentration of 0.5 to 10% by mass at a temperature of 10 to 90 ° C. for 10 to 60 minutes. A method of cleaning the food and beverage production line by circulating to the food production line. A cleaning agent dilution obtained by diluting the cleaning composition for CIP according to claim 1 or 2 with water to a concentration of 0.01 to 10% by mass at a temperature of 10 to 60 ° C for 0.1 to 24 hours. A method of filling a food / beverage product production line and washing the food / beverage product production line.