JP2006181450A - Cip-based deodorization cleaning method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a deodorization cleaning method which enables the efficient removal of residual flavor in CIP (Cleaning in place) cleaning and leaves little odor of the solvent after cleaning. <P>SOLUTION: The deodorization cleaning method carries out deodorization cleaning by CIP using a gas/liquid two-phase flow consisting of a liquid and a gas. The CIP-based method has at least two cleaning processes including at least one process using the gas/liquid two-phase flow. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

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

  In food factories, beverage factories, etc., the production equipment and equipment are cleaned when the production type is switched or at the end of the operation, etc., but it is CIP cleaning (fixed cleaning) 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 so that the previous filling does not remain on the production line and that the flavor blended in the previous filling does not enter the next filling. 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 the device may be damaged 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 performing deodorization cleaning using a nonionic surfactant, but even with this method, flavor removal is not sufficient. Patent Documents 2 to 4 disclose that a nonionic surfactant or an amphoteric surfactant is used as a cleaning agent for beer brewing equipment or the like, but the effect of removing the flavor is not sufficient.

On the other hand, Patent 5 discloses a technique using an organic solvent and a gas-liquid two-phase flow. However, the technique of Patent Document 5 is not suitable for food factories due to the problem of residual base.
JP 2003-49193 A JP 2001-49296 A JP 2001-207190 A JP 2002-1054889 A JP 2002-66486 A

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

  The beverage flavor component is composed of low water-soluble components such as alcohols, esters, aldehydes and acids. Therefore, it penetrates to the inside of the packing by coming into contact with the packing joining the beverage filling line and the packing attached to the heat exchanger. Therefore, in general CIP cleaning in which rinsing with alkali cleaning, acid cleaning and hot water cleaning is performed, the flavor existing in the vicinity of the packing surface can be removed to some extent, but it is difficult to remove even the flavor existing in the packing. It is.

  The present invention relates to a deodorizing and cleaning method by CIP using a gas-liquid two-phase flow of a liquid and a gas.

  The present invention also relates to a deodorizer cleaning method by CIP that has two or more cleaning steps, and uses a gas-liquid two-phase flow in at least one of the cleaning steps.

  ADVANTAGE OF THE INVENTION According to this invention, the transition from the inside of a packing to a bubble part can be accelerated | stimulated using the vapor pressure of the flavor component which has osmose | permeated the packing. That is, the flavor component is mainly a component that easily diffuses into the air because of its high vapor pressure. Therefore, it is considered that the flavor component can be efficiently eliminated by interposing the gas (bubbles) in the cleaning liquid. Specifically, when a gas part (particularly, a bubble) comes into contact with the packing surface, the bubble is pressed against the packing by a liquid flow (turbulent flow). Thereby, the contact area between the packing surface and the bubble portion is temporarily increased, and the flavor component inside the packing is easily transferred to the bubble portion. Thereafter, when the liquid portion such as water comes into contact with the bubble portion, the bubble portion containing the flavor component is separated from the packing and released into the atmosphere. Therefore, it is considered that the removal efficiency of flavor components is increased. Thus, in this invention, it is guessed that the transition from the inside of a packing to a bubble part is accelerated | stimulated using the vapor pressure of the flavor component which has osmose | permeated the packing. Further, it is considered that the removal efficiency of the flavor component existing in the gap between the packing and the piping member is increased by the same mechanism as described above.

  ADVANTAGE OF THE INVENTION According to this invention, the deodorizing washing | cleaning method by CIP which can remove a flavor efficiently in the CIP process currently performed and a base odor hardly remains after washing | cleaning is provided. The present invention is suitable for washing beverage filling lines, and further suitable for deodorization washing in food industry plants. In particular, the present invention is suitable as a deodorizing and cleaning method in a stationary state of equipment for handling flavors, particularly flavor components for beverages, and in particular, a deodorizing and cleaning method for pipelines having a packing made of rubber, plastic, or the like.

  In the deodorizing cleaning method by CIP of the present invention, a gas-liquid two-phase flow of liquid and gas is used. In particular, it is a deodorization cleaning method by CIP having two or more steps, and a gas-liquid two-phase flow is used in one or more steps. As a process, a washing process (an alkali washing process, an acid washing process, a detergent washing process, etc.), a rinse process, etc. are mentioned, and all include the case where it performs two or more times.

  As for the relationship between the gas-liquid two-phase flow and the flow state in the pipe, academic considerations have been added from various aspects (see revised 5th edition, Chemical Engineering Handbook, Maruzen Co., Ltd., 1988, pages 272-274). ). As mentioned in Patent Document 5, the flow state of the gas-liquid two-phase flow differs depending on the gas superficial velocity flow rate and the liquid superficial velocity. The liquid superficial velocity in a general CIP process is 0.5 to 10 m / sec. When the gas superficial velocity is changed, in the horizontal direction, like a plug flow or a slag flow (intermittent flow), an annular shape It takes a flow state such as a flow or an annular spray flow. Further, in the vertical direction, a flow state such as a bubble flow, a Chum flow, an annular flow, or an annular spray flow is taken.

  That is, it is considered that the more frequently the gas part (gas phase and bubbles) contacts the packing, the more efficiently the flavor can be removed from the packing. Therefore, in the horizontal direction, the flow state in the pipe is a plug flow or slag flow. (Intermittent flow), an annular flow, and an annular spray flow are preferable. In the vertical direction, a bubble flow, a Chum flow, an annular flow, and an annular spray flow are preferable.

  From the above, when deodorizing and cleaning the inner surface of the pipe line with CIP, the superficial velocity of the liquid is preferably from 0.5 to 10 m / sec, more preferably from the viewpoint of deodorizing efficiency and economy. It is 5-5.0 m / sec, More preferably, it is 0.5-3 m / sec, Especially preferably, it is 1-2 m / sec. Further, the volume ratio (Vol%) of the gas to the liquid is 0.001 to 10, preferably 0.001 to 1, more preferably 0.001 to 0.1 from the viewpoint of improving the deodorizing property. .

  Examples of the liquid constituting the gas-liquid two-phase flow used in the present invention include water, neutral aqueous solution, alkaline aqueous solution, acid aqueous solution and the like, and water is preferable. Moreover, the cleaning composition containing 1 or more types chosen from a solvent and surfactant and water can also be used. These solvents and surfactants can be the same as the detergent composition described later.

  The gas constituting the gas-liquid two-phase flow used in the present invention is preferably air, compressed air, nitrogen gas, or other inert gas. In addition, ozone-containing gas, carbon dioxide, etc. Can be used.

  The gas-liquid two-phase flow of the liquid and the gas is generated by introducing the gas into the piping line, and is applied to the target site for CIP cleaning and deodorization. The gas-liquid two-phase flow is preferably used at a pH of 1 to 14 in the liquid portion.

  In the present invention, a detergent composition (hereinafter referred to as “cleaning agent composition”) comprising at least one selected from the solvent (A) [hereinafter also referred to as “component (A)” and surfactant (B) [hereinafter also referred to as “component (B)”). It is preferable to include a cleaning step (1) with a cleaning liquid containing a cleaning composition (also referred to as cleaning composition 1) and a cleaning step (2) with a gas-liquid two-phase flow. More preferably, the cleaning step (2) is performed after the cleaning step (1).

<(A) component>
As the component (A), hydrocarbon compounds typified by mineral oils, ester compounds (esters synthesized from alcohols and fatty acids, ester compounds typified by edible oils), alcohol compounds typified by higher alcohols, etc. Can be mentioned.

  Examples of the hydrocarbon compound include aliphatic hydrocarbons and aromatic hydrocarbons, but aliphatic hydrocarbons are preferable, and 5 to 20 aliphatic hydrocarbons are particularly preferable. Further, an aliphatic hydrocarbon having 8 to 14 is preferable, and an aliphatic hydrocarbon having 10 to 14 carbon atoms is particularly preferable. Specifically, pentane, isopentane, hexane, isohexane, cyclohexane, heptane, isoheptane, octane, isooctane, nonane, isononane, decane, isodecane, undecane, isoundecane, dodecane, isododecane, tridecane, isotridecane, tetradecane, isotetradecane, pentadecane , Isopentadecane, hexadecane, isohexadecane, heptadecane, isoheptadecane, octadecane, isooctadecane, nonadecane, isononadecane, C10 α-olefin, C12 α-olefin, C14 α-olefin, and the like. Are preferably decane, isodecane, undecane, isoundecane, dodecane, isododecane, tridecane, isotridecane, tetradecane, isotetra Kang, include α- olefins such as the C12.

  Examples of the ester compound include those represented by the following general formulas (1) to (4).

[In the formula, R ^{11 to} R ¹⁶ may be the same or different, each having an alkyl group having 1 to 30 carbon atoms, an alkyl group having 1 to 30 carbon atoms substituted with a hydroxyl group, or 2 to 30 carbon atoms. An alkenyl group, an aryl group having 6 to 30 carbon atoms, an arylalkyl group having 7 to 30 carbon atoms, or an alkylaryl group having 7 to 30 carbon atoms is represented. R ¹⁷ represents an alkylene group having 1 to 20 carbon atoms or an alkenylene group having 2 to 20 carbon atoms. R ²¹ , R ²⁴ , and R ²⁵ may be the same or different, each having an alkyl group having 1 to 24 carbon atoms, an alkyl group having 2 to 24 carbon atoms substituted with a hydroxyl group, or an alkenyl having 2 to 24 carbon atoms. Group, an aryl group having 6 to 24 carbon atoms, an arylalkyl group having 7 to 24 carbon atoms, or an alkylaryl group having 7 to 24 carbon atoms. R ²² is an alkylene group having 2 to 24 carbon atoms, an alkenylene group having 2 to 24 carbon atoms, an arylene group having 6 to 24 carbon atoms, an arylene alkylene group having 7 to 24 carbon atoms, or an alkylarylene group having 7 to 24 carbon atoms. Represents. R ²³ represents a group obtained by removing a hydroxyl group from a trivalent alcohol having 3 to 24 carbon atoms. ]

  Specifically, as the ester compound of the general formula (1), methyl hexanoate, hexyl acetate, ethyl butyrate, octyl acetate, isoamyl acetate, ethyl myristate, octyl stearate, isooctyl myristate, oleyl oleate, oleic acid Isooctyl, methyl laurate, ethyl laurate, methyl stearate, ethyl stearate, isoamyl butyrate, phenylethyl acetate, geranyl formate, citronellyl acetate, ethyl benzoate, octyldodecyl oleate, octyldodecyl stearate or octyldodecyl myristate, etc. Ethyl myristate, octyl stearate, isooctyl myristate, oleyl oleate, isooctyl oleate, methyl laurate, ethyl laurate, methyl stearate, Stearate ethyl, octyldodecyl oleate, octyldodecyl or octyldodecyl myristate stearate are preferred.

  Examples of the ester compound of the general formula (2) include ethylene glycol diolate, ethylene glycol dilaurate, ethylene glycol distearate, propylene glycol dilaurate, or propylene glycol distearate. Ethylene glycol diolate, ethylene glycol dilaurate, or propylene Glycol dilaurate is preferred.

  Examples of the ester compound represented by the general formula (3) include triglycerides, beef tallow, lard, bone oil, whale oil, and cinnamon that are present in various vegetable oils represented by rapeseed oil, olive oil, coconut oil, sesame oil, corn oil, soybean oil and the like. Examples include triglycerides, glycerin tristearate or glycerin trilaurate present in various animal oils typified by oil, sardine oil, etc., and triglycerides or glycerin trilaurate present in rapeseed oil, coconut oil, soybean oil preferable.

  Examples of the ester compound of the general formula (4) include dimethyl adipate, diethyl adipate, dioctyl phthalate, dimethyl azelate or diethyl azelate, and dimethyl adipate, diethyl adipate or dioctyl phthalate is preferable.

Examples of the alcohol compound include compounds represented by the following general formula. Among them, those having a solubility in water at 25 ° C. of 10% by weight or less are preferable.
R-OH
(In the formula, R is an alkyl group having 7 to 24 carbon atoms, an alkenyl group having 7 to 24 carbon atoms, an aryl group having 8 to 24 carbon atoms, an alkylaryl group having 8 to 24 carbon atoms, or an alkyl group having 8 to 24 carbon atoms. Represents an arylalkyl group.)

  Specifically, iso-heptanol, iso-octanol, n-nonanol, n-decanol, iso-decanol, n-dodecanol, iso-tridecanol, n-tetradecanol, iso-tetradecanol, n-hexa Examples include decanol, iso-hexadecanol, n-octadecanol, iso-octadecanol, octyldodecyl alcohol, n-docosanol, oleyl alcohol, phytol, iso-phytol, or ethylbenzyl alcohol. Preferably iso-heptanol, iso-octanol, n-nonanol, n-decanol, iso-decanol, n-dodecanol, iso-tridecanol, n-tetradecanol, iso-tetradecanol, iso-hexadecanol, Iso-octadecanol, octyldodecyl alcohol, oleyl alcohol, iso-phytol, benzyl alcohol or ethylbenzyl alcohol, particularly preferably iso-octanol, n-nonanol, n-decanol, iso-decanol, n-dodecanol , Iso-tridecanol, iso-tetradecanol, iso-hexadecanol, iso-octadecanol, octyldodecyl alcohol or oleyl alcohol. In these, “n-” means a straight chain, and “iso-” means a branched chain (the same applies hereinafter).

The component (A) preferably has an SP value of 6 to 9 at 25 ° C. The SP value is a solubility parameter δ [(cal / cc) ^1/2 ] generally used as a measure of compatibility between substances, and the component (A) is excellent in deodorization (odor removal performance). Therefore, the SP value at 25 ° C. is more preferably 7 to 8.5, and particularly preferably 7 to 8. The component (A) preferably has a melting point of 100 ° C. or lower, more preferably 80 ° C. or lower, from the viewpoint of deodorizing properties. In particular, 65 ° C. or lower is preferable.

<(B) component>
Examples of the component (B) include nonionic surfactants, anionic surfactants, amphoteric surfactants, and cationic surfactants. When the component (A) and the component (B) are used in combination, a nonionic surfactant and an anionic surfactant are preferable from the viewpoint of assisting the emulsifying dispersibility of the component (A).

  Nonionic surfactants include polyoxyalkylene alkyl ether, polyoxyalkylene alkylamine, polyoxyalkylene fatty acid ester, alkyl polyglycoside, alkyl glyceryl ether, glycerin fatty acid ester, polyglycerin fatty acid ester, sucrose fatty acid ester, polyoxy Examples thereof include ethylene-polyoxypropylene block polymers and polyoxyalkylene polyhydric alcohol fatty acid esters. In these nonionic surfactants, the polyoxyalkylene is preferably polyoxyethylene, polyoxypropylene and a mixture thereof, and the alkyl group preferably has 8 to 18 carbon atoms and can be changed to an alkenyl group. The number of carbon atoms of the fatty acid is preferably 8-18.

  Nonionic surfactants, particularly polyoxyalkylene alkyl ethers, preferably have an HLB value of 3 or more and less than 8 according to the Griffin calculation formula.

  Examples of the anionic surfactant include fatty acid salts (preferably having 8 to 24 carbon atoms), alkyl (preferably having 8 to 24 carbon atoms) sulfonate, alkyl (preferably having 8 to 18 carbon atoms) benzenesulfonate, alkyl (Preferably C8-24) sulfate ester salt, alkyl (preferably C2-24) phosphate ester salt, polyoxyalkylene (preferably polyoxyethylene) alkyl (preferably C8-18) sulfate ester Salt, polyoxyalkylene (preferably polyoxyethylene) alkyl (preferably 2-24 carbons) phosphate ester salt, polyoxyalkylene (preferably polyoxyethylene) alkyl (preferably 8-18 carbons) carboxylate , Alkyl (preferably having 6 to 18 carbon atoms) sulfosuccinate and the like.

  Examples of the amphoteric surfactant include alkyl (preferably 8 to 18 carbon atoms) amine oxide, alkyl (preferably 8 to 18 carbon atoms) dimethylaminoacetic acid betaine, alkyl (preferably 8 to 18 carbon atoms) amidopropyl betaine, alkyl (Preferably having 8 to 18 carbon atoms) Hydroxysulfobetaine, alkyl (preferably having 8 to 18 carbon atoms) carboxymethylhydroxyethyl imidazolinium betaine and the like can be mentioned.

  Examples of the cationic surfactant include alkyl chloride (preferably having 6 to 24 carbon atoms) trimethylammonium, dialkyl chloride (preferably having 6 to 18 carbon atoms) dimethyl ammonium, benzalkonium chloride (preferably having 6 to 18 carbon atoms) and the like. Is mentioned.

  When the component (A) and the component (B) are used in combination, the weight ratio of the component (A) to the component (B) in the cleaning agent is preferably (A) / (B) = 1/99 to 99/1. More preferably, it is 20/80 to 90/10, and particularly preferably 30/70 to 70/30. If the weight ratio of (A) / (B) is 99/1 or less, a sufficient deodorizing effect can be obtained. Further, when the weight ratio (A) / (B) is 1/99 or more, the stability of the dispersion system is improved, and adhesion contamination to pipes and the like is eliminated.

  The cleaning composition 1 is used for CIP cleaning as a cleaning liquid 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 0.01 to 20% by weight, more preferably 0.1 to 10% by weight, and particularly 0.2 to 5% by weight, from the viewpoint of cleanability and economy. The concentration of component (B) is preferably 0.01 to 20% by weight, more preferably 0.1 to 15% by weight, and particularly preferably 0.5 to 10% by weight.

  The detergent composition 1 can be used by adding an antifoaming agent, a rust preventive agent, a chelating agent, a pH adjusting agent such as alkali or acid, and a water-soluble solvent such as ethanol, if necessary. In addition, it is preferable to use the cleaning liquid obtained from the cleaning composition 1 at a pH of 1 to 14.

<Deodorizing and cleaning method by CIP>
The deodorizing and cleaning method using CIP of the present invention uses a gas-liquid two-phase flow of a liquid and a gas. From the viewpoint of improving the deodorizing property, preferably, a cleaning step (1) with a cleaning liquid containing the cleaning composition 1 and a cleaning step (2) with a gas-liquid two-phase flow are included.

  As an example of the present invention, the CIP process includes (a) hot water washing 1, (b) alkaline washing, (c) hot water washing 2, (d) acid washing, and (e) hot water washing 3 in this order. The cleaning process using the cleaning liquid containing the cleaning composition 1 is performed in one or more of the steps (a) to (e), and the cleaning using the gas-liquid two-phase flow is performed using the cleaning liquid including the cleaning composition 1 described above. A CIP deodorization cleaning method performed in any one or more of the steps (a) to (e) other than the steps may be mentioned. In this case, (b) to (e) can be further repeated in consideration of deodorizing properties.

  In the above-described method, cleaning with a gas-liquid two-phase flow can be performed in the step (a), and a cleaning step with a cleaning liquid containing the cleaning agent composition 1 can be performed in the step (b). In addition, cleaning by a gas-liquid two-phase flow can be performed in the step (a), and a cleaning step using a cleaning liquid containing the cleaning composition 1 can be performed in the step (d). Moreover, such an aspect and another aspect can also be combined.

  More preferably, after performing the cleaning process with the cleaning liquid containing the cleaning composition 1, the cleaning process with a gas-liquid two-phase flow is performed. That is, in the CIP step having the above steps (a) to (e), the cleaning step with the cleaning liquid containing the cleaning agent composition 1 is performed in one or more steps (a) to (e), and the gas-liquid two-phase flow This is a CIP deodorization cleaning method in which cleaning using is performed at least one step after the cleaning step using the cleaning liquid. Specific examples thereof include a method of performing a cleaning step with a cleaning liquid containing the cleaning agent composition 1 in the step (b) and performing a cleaning with a gas-liquid two-phase flow in the step (c). Moreover, the method of performing the washing | cleaning process by the washing | cleaning liquid containing the cleaning composition 1 at the (b) process and performing the washing | cleaning by a gas-liquid two-phase flow at the (e) process is mentioned. Moreover, such an aspect and another aspect can also be combined.

  The temperature in each step of CIP is preferably in the range of 10 ° C. to 150 ° C., more preferably 40 to 120 ° C., and particularly preferably 60 to 98 ° C. from the viewpoint of improving deodorization.

  The present invention is particularly effective for cleaning and deodorizing pipelines having packing. Examples of the material for the packing include rubber and plastic.

Example 1 and Comparative Example 1
After pre-washing (80 ° C / 10 minutes) using the scented specimen, perform the main cleaning (80 ° C / 60 minutes, with or without bubbling), and the base residue felt from the specimen And the remaining amount of flavor in the specimen were confirmed.

(1) Test object EPDM (ethylene / propylene / diene / rubber) packing (Osaka Sanitary Metal Industry Cooperative) was used as a test piece. The test piece was immersed in a peach drink (commercially available product) at 80 ° C. for 8 hours and flavored to obtain a test object. The remaining amount of flavor of the test sample before washing was 223 μg / g.

(2) Test method (preliminary cleaning)
200 g of water was added to a 300 cc beaker, and the temperature was raised to 80 ° C. while stirring with a magnetic stirrer. There, two test specimens were immersed and stirred at 80 ° C. for 10 minutes.

(Main cleaning)
Two 1 L beakers were prepared, 800 g of water was added to each beaker, and the temperature was raised to 80 ° C. while stirring with a magnetic stirrer. In order to continuously generate fine bubbles in one of the beakers, bubble mate (Sudo Co., Ltd.) connected with a hose was immersed, and air (1 L / min) was continuously fed into the beaker for bubbling. The other beaker was not bubbled for comparison.

  The test object was immersed again in each 1 L beaker and left at 80 ° C. for 60 minutes. Thereafter, the test specimen was taken out, extracted with Soxhlet for 2 hours with ethanol, and the extract was subjected to gas chromatography analysis to confirm the remaining amount of flavor components in the test specimen. The results are shown in Table 1.

(3) Evaluation method The test piece after a series of washing steps was dried, sealed after being transferred to a 100 cc screw tube, and stored at room temperature for 12 hours as an evaluation sample.

(Base residue)
Five panel evaluations were conducted on the base odor felt from the test object by two panelists. It can be said that the smaller the score, the better the base residue. The average value of the evaluation points by the two panelists was evaluated as “odor residual”. Judgment criteria are as follows.
(Evaluation points and criteria)
5: I feel a strong smell 4: I feel a pretty smell 3: I feel a little smell 2: I feel a faint smell 1: I don't feel a smell

(Remaining flavor of the DUT)
After Soxhlet extraction with ethanol for 2 hours, the extract was analyzed by gas chromatography (manufactured by Agilent). Among peach flavor components, hexyl acetate, linalool, and decalactone, which have relatively high analytical accuracy, were quantified. The amount of the flavor component was converted per unit weight of the specimen.

Example 2 and Comparative Example 2
Using a flavored test object, pre-washing (80 ° C./10 minutes) with a cleaning solution containing the components shown in Table 2, followed by main washing (80 ° C./60 minutes, with / without bubbling) The test was carried out to confirm the base residual property felt from the specimen and the remaining amount of flavor in the specimen.

(1) Test object The same test object as Example 1 was used.

(2) Test method (preliminary cleaning)
In a 300 cc beaker, 1 g of the solvent and surfactant shown in Table 1 was collected in terms of effective amount, water was added to 200 g, and the mixture was heated to 80 ° C. while stirring with a magnetic stirrer. There, two test specimens were immersed and stirred at 80 ° C. for 10 minutes.

(Main cleaning)
Two 1 L beakers were prepared, 800 g of water was added to each beaker, and the temperature was raised to 80 ° C. while stirring with a magnetic stirrer. In order to continuously generate fine bubbles in one of the beakers, bubble mate (Sudo Co., Ltd.) connected with a hose was immersed, and air (1 L / min) was continuously fed into the beaker for bubbling. The other beaker was not bubbled for comparison.

  The test object was immersed again in each 1 L beaker and left at 80 ° C. for 60 minutes. Thereafter, the test object was taken out, and the base residue and the flavor remaining amount of the test object were evaluated in the same manner as in Example 1. The results are shown in Table 2.

* 1 Normal decane: Reagent product (purity 99%), SP value 7.6 at 25 ° C., melting point 20 ° C. or less * 2 Normal undecane: Reagent product (purity 99%), SP value 7.7 at 25 ° C. Melting point 20 ° C. or lower * 3 Normal dodecane: Reagent product (purity 99%), SP value 7.7 at 25 ° C., melting point 20 ° C. or lower * 4 Oleyl alcohol: Reagent product, carbon number 18, solubility (vs. water, 25 ° C.) ) 1% by weight or less, number of hydroxyl groups 1, SP value 8.6 at 25 ° C., melting point 20 ° C. or less * 5 octyl stearate: manufactured by Kao Corporation, Exepar EH-S, solubility (to water, 25 ° C.) 1% by weight or less, SP value of 8.1 or 25 for ester groups, melting point of 20 ° C. or less * 6 Nonionic surfactant A: polyoxyethylene alkyl ether [manufactured by Kao Corporation, Emulgen 109P]
* 7 Nonionic surfactant B: Polyoxyethylene sorbitan ester (Kao Co., Ltd., Rheodor TW-L106)
* 8 Nonionic surfactant C: alkylpolyglycoside [Maydol 12 manufactured by Kao Corporation]
* 9 Anionic surfactant A: Sodium dialkylsulfosuccinate [Perox OT-P, manufactured by Kao Corporation]
* 10 Cationic Surfactant A: Lauryltrimethylammonium chloride [manufactured by Kao Corporation, Coatamine 24P]
* 11 Amphoteric surfactant A: lauryl betaine [manufactured by Kao Corporation, Amphitol 24B]

Claims (6)

A deodorizing cleaning method by CIP using a gas-liquid two-phase flow of liquid and gas. A deodorizer cleaning method using CIP, which has two or more cleaning steps, and uses a gas-liquid two-phase flow in at least one of the cleaning steps. The washing | cleaning process (1) by the washing | cleaning liquid containing the cleaning composition containing 1 or more types chosen from a solvent and surfactant, and the washing | cleaning process (2) by a gas-liquid two-phase flow are included. Deodorizing cleaning method by CIP. The deodorization cleaning method by CIP according to claim 3, wherein the cleaning step (2) is performed after the cleaning step (1). The deodorizing cleaning method by CIP according to claim 3 or 4, wherein the cleaning composition contains a solvent and a surfactant. The deodorizing and cleaning method using CIP according to any one of claims 1 to 5, wherein the object of deodorizing and cleaning is a pipeline having packing.