JP2005314580A - Cleansing composition for cip - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cleansing composition for CIP (cleaning in place), capable of removing residual flavor in a good efficiency in the CIP cleaning and almost without remaining solvent smell after the cleaning. <P>SOLUTION: This cleansing composition for the CIP contains (A) ≥1 kind of a nonionic surfactant selected from an alkylpolyglycoside, an alkyl glyceryl ether and a polyoxyalkylene alkylamine, and water. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a CIP cleaning composition and a CIP cleaning method. More specifically, the present invention relates to a CIP cleaning composition and a CIP cleaning method used for cleaning manufacturing equipment and manufacturing equipment such as food and beverage factories.

  In food factories, beverage factories, etc., production facilities and equipment are cleaned when production varieties are switched or when operations are completed, etc., but CIP cleaning (stationary cleaning) is difficult for places where piping and tanks are difficult to remove and clean. )It is carried out. This CIP cleaning is an acronym for “Cleaning in place”, and is a method of cleaning by flowing a cleaning agent without disassembling the apparatus.

  CIP cleaning is widely used in food factories and beverage factories. Especially in beverage factories, when switching production varieties, etc., thoroughly wash the product so that the previous product does not remain on the production line and the flavor contained in the previous product is not mixed into the next product. is important.

  For this reason, in food factories, etc., CIP cleaning is carried out over time. In particular, flavors tend to remain in the packing parts (seal parts) such as pipe connection parts in the production line in order to sufficiently remove the flavors. Takes a lot of effort.

  In recent years, with the increase in production speed and the increase in beverage varieties, the frequency of switching is increased, and the time loss of the CIP process is a cause of remarkably reducing productivity.

  Conventionally, in CIP cleaning, alkali cleaning, acid cleaning, and cleaning using a combination of these are appropriately performed in accordance with dirt inside manufacturing equipment and piping of manufacturing equipment, but in order to increase cleaning efficiency, In some cases, an oxidizing agent such as chlorate, isocyanurate, percarbonate, or perborate is used. However, a sufficient deodorizing effect is still not obtained, and equipment damage may occur depending on the use situation.

Under these circumstances, techniques for further improving the cleaning efficiency and flavor removal efficiency in CIP cleaning have been proposed. For example, Patent Document 1 discloses a technique for deodorizing and cleaning using a specific nonionic surfactant, but even with this method, flavor removal is not sufficient.
JP 2003-49193 A

  In view of the above situation, an object of the present invention is to provide a CIP cleaning composition and a CIP cleaning method that can efficiently remove the remaining flavor in the currently performed CIP process and hardly leave a solvent odor after cleaning. .

  The present invention relates to a CIP cleaning composition containing one or more nonionic surfactants (A) selected from alkyl polyglycosides, alkyl glyceryl ethers and polyoxyalkylene alkyl amines and water.

  The present invention also relates to a cleaning medium containing at least one nonionic surfactant (A) (hereinafter referred to as component (A)) selected from alkyl polyglycosides, alkyl glyceryl ethers and polyoxyalkylene alkyl amines and water. The present invention relates to a CIP cleaning method including a step (1) of bringing (I) into contact with an object to be cleaned.

  According to the present invention, in CIP cleaning, flavors can be efficiently removed, and there is almost no solvent odor even after cleaning, and the cleaning time can be shortened compared to the prior art.

<(A) component>
The component (A) of the present invention is one or more nonionic surfactants selected from alkyl polyglycosides, alkyl glyceryl ethers and polyoxyalkylene alkyl amines, and in particular one selected from alkyl polyglycosides and alkyl glyceryl ethers. The above nonionic surfactants are preferred.

  As alkyl polyglycoside, 3-30 are preferable, as for carbon number of an alkyl group, 4-24 are especially preferable, and 5-20 are especially preferable. Moreover, 1-10 are preferable, as for the average condensation degree of monosaccharides, such as glucose, 1-5 are especially preferable, and 1-3 are especially preferable. Among the alkylpolyglycosides, alkylpolyglucosides whose constituent sugar is glucose are preferred.

  As alkyl glyceryl ether, 3-30 are preferable, as for carbon number of an alkyl group, 4-24 are especially preferable, and 5-20 are especially preferable.

  As polyoxyalkylene alkylamine, 3-30 are preferable, as for carbon number of an alkyl group, 4-24 are especially preferable, and 5-20 are especially preferable. Moreover, as an alkylene group of polyoxyalkylene, C2-C4 is preferable, 2-3 is especially preferable, and 2 is especially preferable. Moreover, as an average addition mole number of polyoxyalkylene, 2-20 are preferable, 2-15 are especially preferable, and 2-10 are especially preferable.

  Specific examples of the component (A) include n-octyl polyglucoside, iso-octyl polyglucoside, n-nonyl polyglucoside, n-decyl polyglucoside, iso-decyl polyglucoside, n-dodecyl polyglucoside, iso-dodecyl poly Glucoside, iso-tridecyl polyglucoside, n-tetradecyl polyglucoside, iso-tetradecyl polyglucoside, n-hexadecyl polyglucoside, iso-hexadecyl polyglucoside, n-octadecyl polyglucoside, iso-octadecyl polyglucoside, etc. Alkyl polyglycosides; n-octyl glyceryl ether, iso-octyl glyceryl ether (2-ethylhexyl glyceryl ether, etc.), n-nonyl glyceryl ether, n-decyl glyceryl ether, iso-decyl glyceride Ether, n-dodecyl glyceryl ether, iso-dodecyl glyceryl ether, iso-tridecyl glyceryl ether, n-tetradecyl glyceryl ether, iso-tetradecyl glyceryl ether, n-hexadecyl glyceryl ether, iso-hexadecyl glyceryl ether, n -Alkyl glyceryl ethers such as octadecyl glyceryl ether, iso-octadecyl glyceryl ether; polyoxyethylene n-octylamine, polyoxyethylene iso-octylamine, polyoxyethylene-polyoxypropylene n-decylamine, polyoxyethylene iso-decylamine, Polyoxyethylene n-dodecylamine, polyoxyethyleneiso-dodecylamine, polyoxyethyleneiso-tridecylamine, poly Xylethylene n-tetradecylamine, polyoxyethylene iso-tetradecylamine, polyoxyethylene n-hexadecylamine, polyoxyethylene iso-hexadecylamine, polyoxyethylene n-octadecylamine, polyoxyethylene iso-octadecylamine, etc. Of the polyoxyalkylene alkylamine. Alkyl polyglycosides include n-decyl polyglucoside, iso-decyl polyglucoside, n-dodecyl polyglucoside, iso-dodecyl polyglucoside, iso-tridecyl polyglucoside, n-tetradecyl polyglucoside, iso-tetradecyl polyglucoside As alkyl glyceryl ether, n-octyl glyceryl ether, iso-octyl glyceryl ether, n-nonyl glyceryl ether, n-decyl glyceryl ether, iso-decyl glyceryl ether, n-dodecyl glyceryl ether, iso-dodecyl glyceryl ether, iso -Tridecyl glyceryl ether, n-tetradecyl glyceryl ether, and iso-tetradecyl glyceryl ether are preferable. In these, “n-” means a straight chain, and “iso-” means a branched chain (the same applies hereinafter).

  From the viewpoint of deodorization, the component (A) preferably has a solubility in water at 25 ° C. of 0.01 to 50% by weight, particularly 0.01 to 30% by weight, more particularly 0.01 to 10% by weight is preferred. The solubility here refers to the maximum concentration at which the appearance can be kept transparent in a homogeneous phase by adding the component (A) in water at 25 ° C. [weight (g) of the component (A) with respect to 100 g of water: unit is % By weight]. Moreover, from the viewpoint of reducing the persistence of the cleaning base, the (A) component [component (A1)] having a solubility of 0.01 to 10% by weight and the component (A) having a solubility exceeding 10% by weight [ (A2) component] is preferably used in combination. In that case, the weight ratio of (A1) / (A2) = 10/90 to 90/10, 40/60 to 80/20 is preferable.

<CIP cleaning composition>
The cleaning composition for CIP of the present invention contains 0.01 to 50% by weight of component (A) and the balance water. Examples of the concentrated stock solution used for the preparation of such a composition include the component (A) alone or a mixture of organic solvents compatible with the component (A). The content of the component (A) in the concentrated stock solution is 1 to 100% by weight, preferably 10 to 100% by weight, from an economical viewpoint. Most preferably, it is 20-100 weight%. The content of water in the concentrated stock solution is 0 to 99% by weight, preferably 0 to 90% by weight. Particularly preferably, it is 0 to 80% by weight.

  In the present invention, the component (A) is at least one selected from alkyl polyglycosides, alkyl glyceryl ethers and polyoxyalkylene alkyl amines, preferably at least one non-ionic surfactant selected from alkyl polyglycosides and alkyl glyceryl ethers. The cleaning effect is further improved by combining these with water.

  In the present invention, in addition to the component (A), an anionic surfactant, a cationic surfactant, an amphoteric surfactant, an antifoaming agent, a rust inhibitor, a chelating agent, a water-soluble solvent, an inorganic salt, a water-insoluble, as necessary It can be used by adding a neutral solvent or the like.

  The cleaning composition for CIP of the present invention is used for CIP cleaning as a cleaning solution diluted with a non-aqueous solvent, an aqueous solvent, water or the like. The dilution medium is preferably water from the viewpoint of economy and safety. In the diluted cleaning solution, the concentration of the component (A) is preferably 0.01 to 20% by weight, more preferably 0.1 to 10% by weight, and particularly preferably 0.5 to 5%, from the viewpoints of cleanability and economy. % By weight.

<CIP cleaning method>
As described above, the CIP cleaning composition of the present invention is preferably used as a diluted cleaning solution for CIP cleaning. The cleaning liquid is preferably circulated and cleaned in a range of 10 ° C. to 98 ° C. so as to come into contact with the piping and various devices that are the objects to be cleaned in CIP cleaning. Further, the flow rate of the cleaning liquid flowing in the pipe is preferably 0.5 to 5 m / second, and more preferably 1 to 3 m / second.

  Moreover, in this invention, the CIP washing | cleaning method including the process (1) which makes the washing | cleaning medium (I) containing (A) component and water contact a to-be-washed | cleaned object can be performed. As the component (A), those described above are used.

  In this case, the cleaning medium (I) is preferably a cleaning liquid obtained by diluting the cleaning composition of the present invention. In the cleaning medium (I), the concentration of the component (A) is preferably 0.01 to 20% by weight, more preferably 0.1 to 10% by weight, and particularly preferably 0.5 to 5% by weight.

  For example, CIP washing in a beverage plant is performed by (a) hot water washing → (b) alkali washing → (c) hot water washing → (d) acid washing → (e) hot water washing. Later, if necessary, further washing with hypochlorite and hot water may be performed. The step (1) may be performed in any one of such cleaning steps, specifically, before and / or after any of the steps (a) to (e), or any step. It can be performed with substitution or simultaneously with any step. The step (1) can be performed alone or simultaneously with each step as long as it is between the steps (a) to (e), but considering the total CIP time, simultaneously with any of the steps (a) to (e) Preferably it is done. Note that a plurality of steps (1) may be performed.

In the examples, “%” and “parts” are respectively “% by weight” and “parts by weight” unless otherwise specified.

Example 1
A cleaning composition for CIP was prepared with the composition shown in Table 1. Using them, the deodorizing property and the base odor were tested by the following method. The results are shown in Table 1. As comparative product 1-1, the result of performing the cleaning steps (a) to (e) described later without using the cleaning medium (I) is shown.

(1) Test object An EPDM (ethylene / propylene / diene / rubber) sheet (Osaka Sanitary Metal Industry Cooperative) made of the same material as the packing was cut into 5 cm × 0.5 cm (thickness 2 mm) to obtain a test piece. The test piece was obtained by immersing the test piece in a commercial beverage (peach natural water: manufactured by JT) at 70 ° C. for 2 hours.

(2) Test method When the composition shown in Table 1 (cleaning medium (I): 1.0 g in terms of effective amount) is put into a 100 cc screw tube and then used in step (a) or step (c). Prepare water with a total amount of 100 g each by adding a predetermined amount of NaOH and water when used in step (b) and a predetermined amount of HNO ₃ and water when using in step (d). Keep it. The contents in the screw tube were stirred at 80 ° C. with a magnetic stirrer.

In the case of using the composition in the step (a), one test piece was put into a screw tube containing a diluent containing the composition prepared above, and the following steps were performed. Moreover, when using a composition at a process (b), the screw pipe | tube which put the diluted liquid containing the composition prepared above and NaOH for one to-be-tested body which finished the process (a) by the hot water washing 1 The following steps were performed. When using a composition in the step (c), a diluted solution containing the composition prepared above is prepared for one specimen to be tested after the step (a) by hot water washing 1 and the step (b) by alkali washing. The following process was performed by putting in the screw tube. When using the composition in the step (d), one test object after the step (a) by the hot water washing 1, the step (b) by the alkaline washing, and the step (c) by the hot water washing 2 is as described above. The following steps were performed by feeding the prepared composition and a screw tube containing a diluent containing HNO ₃ . One test piece after a series of washing steps is immersed in a 100 cc screw tube containing 50 g of ion exchange water at 80 ° C. for 30 seconds and then pulled up. This water was used as a sample for evaluation.

(Washing process)
(A) Hot water washing 1: 80 ° C., 20 minutes immersion stirring (b) Alkaline washing: 2% NaOH aqueous solution, 80 ° C., 20 minutes immersion stirring (c) Hot water washing 280 ° C., 20 minutes immersion stirring (d) Acid washing: 0.6% HNO ₃ aqueous solution, 20 minutes immersion stirring (e) Hot water washing 380 ° C., 20 minutes immersion stirring

(3) Evaluation method Five-stage evaluation was performed about the flavor odor and base odor of the test piece by six panelists. It can be said that the smaller the score, the better the deodorizing effect. The average value of the evaluation points by the six panelists was evaluated as “odor residue”. Judgment criteria are as follows.

(Evaluation points and criteria)
5: Strong smell 4: Strong smell 3: Slight smell 2: Slight smell 1: No smell

* 1 Nonionic surfactant A: alkylpolyglucoside [manufactured by Kao Corporation, Mydol 10]
* 2 Nonionic surfactant B: alkylpolyglucoside [manufactured by Kao Corporation, Mydol 12]
* 3 Nonionic surfactant C: alkyl glyceryl ether [manufactured by Kao Corporation, 2-ethylhexyl glyceryl ether]
* 4 Nonionic surfactant D: alkyl glyceryl ether [manufactured by Kao Corporation, iso-decyl glyceryl ether]
* 5 Nonionic surfactant E: Polyoxyethylene coconut alkylamine [Aito 102, manufactured by Kao Corporation]
* 6 Nonionic surfactant F: polyoxyethylene monooleate [Emanon 4110, manufactured by Kao Corporation]
* 7 Nonionic surfactant G: Polyoxyethylene lauryl ether [Emulgen 109P, manufactured by Kao Corporation]
* 8 Nonionic surfactant H: Polyoxyethylene sorbitan trioleate [Reodol TWO320, manufactured by Kao Corporation]

Claims (2)

A cleaning composition for CIP containing one or more nonionic surfactants (A) selected from alkyl polyglycosides, alkyl glyceryl ethers and polyoxyalkylene alkyl amines, and water. A step (1) of bringing a cleaning medium (I) containing one or more nonionic surfactants (A) selected from alkyl polyglycosides, alkyl glyceryl ethers and polyoxyalkylene alkyl amines into contact with an object to be cleaned; CIP cleaning method including.