JP2020100809A - Method for producing fatty acid neutralization product - Google Patents

Abstract

To provide a method for producing a fatty acid neutralization product that can prevent formation of gel of a fatty acid neutralization product and its aggregate.SOLUTION: This method for producing a fatty acid neutralization product includes a mixing step in which a fatty acid blend liquid A is mixed with a basic aqueous solution B. The fatty acid blend liquid A is discharged as a jet into the basic aqueous solution B in the mixing step.SELECTED DRAWING: Figure 9

Description

The present invention relates to a method for producing a neutralized fatty acid product.

In the production of liquid soap, a fatty acid-neutralized product is produced by mixing a fatty acid-containing liquid and a basic aqueous solution and neutralizing the fatty acid with an alkaline agent. Then, as a method for producing such a liquid soap, for example, in Patent Document 1, a fatty acid mixture solution and a basic aqueous solution are brought into contact with each other, and within 1 second after that, they are passed through the pores and mixed. It is disclosed. Further, in Patent Document 2 as a method for producing a solid soap for producing a neutralized product of a fatty acid, a fatty acid mixture liquid and a basic aqueous solution are supplied to a two-fluid mixing nozzle, and the mixture liquid is mixed from the two-fluid mixing nozzle. It is disclosed that a plurality of chambers partitioned by a partition wall having a through hole are provided with an agitating blade that rotates about the axis to inject into a device.

JP, 2009-155529, A JP 59-20399 A

By the way, a fatty acid neutralized product produced by neutralizing a fatty acid with an alkaline agent forms a gel and its aggregate. Then, it takes time to dissolve the gel of this fatty acid neutralized product and its aggregate. Therefore, the formation of gels of fatty acid neutralized products and their aggregates is a major factor that greatly reduces the production efficiency of liquid soap.

An object of the present invention is to provide a gel of a neutralized fatty acid product and a method for producing a neutralized fatty acid product in which the formation of aggregates thereof is suppressed.

The present invention is a method for producing a neutralized fatty acid product, which comprises a mixing step of mixing a fatty acid-mixed liquid and a basic aqueous solution, wherein in the mixing step, the fatty acid-mixed liquid is discharged into the basic aqueous solution in a jet state. It is a thing.

According to the present invention, it is possible to suppress the formation of a gel of a fatty acid neutralized product to be formed and an aggregate thereof by ejecting the fatty acid-mixed liquid into the basic aqueous solution in a jet state.

It is a figure which shows the structure of the fatty-acid neutralized product manufacturing apparatus which concerns on Embodiment 1. It is a front view of the front end surface of the discharge nozzle. It is a longitudinal cross-sectional view of the tip portion of the discharge nozzle. It is a front view of the front end surface of the 1st modification of a discharge nozzle. It is a longitudinal cross-sectional view of the tip part of the 1st modification of a discharge nozzle. It is a front view of the front end surface of the 2nd modification of a discharge nozzle. It is a longitudinal cross-sectional view of the tip part of the 3rd modification of a discharge nozzle. It is a front view of the front end surface of the 4th modification of a discharge nozzle. It is a front view of the front end surface of the 5th modification of a discharge nozzle. It is a front view of the front end surface of the 6th modification of a discharge nozzle. It is a figure which shows the 1st mixing aspect of a fatty acid mixing liquid and a basic aqueous solution. It is a figure which shows the 2nd mixing aspect of a fatty acid combination liquid and a basic aqueous solution. It is a figure which shows the 3rd mixing aspect of a fatty acid mixing liquid and a basic aqueous solution. It is a figure which shows the 4th mixing aspect of a fatty acid mixing liquid and a basic aqueous solution. It is a figure which shows the 5th mixing aspect of a fatty acid mixing liquid and a basic aqueous solution. It is a figure which shows the 6th mixing aspect of a fatty acid mixing liquid and a basic aqueous solution. It is a figure which shows the structure of the fatty-acid neutralized substance manufacturing apparatus which concerns on Embodiment 2. It is a longitudinal cross-sectional view of the mixing part of the fatty-acid neutralized substance manufacturing apparatus which concerns on Embodiment 2. It is a longitudinal cross-sectional view of the mixing part of the fatty-acid neutralized product manufacturing apparatus which concerns on Embodiment 3. It is a figure which shows the structure of the fatty-acid neutralized substance manufacturing apparatus which concerns on Embodiment 4. It is a figure which shows the structure of the fatty-acid neutralized substance manufacturing apparatus of other embodiment.

The present invention is a method for producing a neutralized fatty acid product, which comprises a mixing step of mixing a fatty acid-mixed liquid and a basic aqueous solution, wherein in the mixing step, the fatty acid-mixed liquid is discharged into the basic aqueous solution in a jet state. It is a method for producing a fatty acid neutralized product.

Hereinafter, the description will be made commonly to each embodiment.

In the method for producing a neutralized product of fatty acid of the present invention, first, the fatty acid mixture liquid A and the basic raw material aqueous solution B are prepared.

The fatty acid mixture liquid A contains a fatty acid. Examples of the fatty acid include caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, palm kernel fatty acid, coconut oil fatty acid, tallow fatty acid, and pure fatty acid. The fatty acid mixture liquid A preferably contains one or more of these fatty acids. The carbon number of the fatty acid is preferably 10 or more, more preferably 12 or more, preferably 24 or less, more preferably 22 or less, still more preferably 18 from the viewpoint of suppressing formation of a gel of a fatty acid neutralized product and its aggregate. Or less, more preferably 16 or less.

The content of the fatty acid in the fatty acid mixture liquid A is preferably 5% by mass or more, more preferably 20% by mass or more, and further preferably 40% by mass or more, from the viewpoint of suppressing the formation of a gel of the fatty acid neutralized product and its aggregate. Is more preferably 60 mass% or more, further preferably 80 mass% or more, further preferably 90 mass% or more, preferably 99.5 mass% or less, more preferably 99 mass% or less, More preferably, it is 98.5 mass% or less.

The fatty acid mixture solution A may contain a nonionic surfactant. Examples of the nonionic surfactant include polyalkylene glycol fatty acid esters such as polyethylene glycol monostearate and polyethylene glycol monooleate; polyoxyalkylene alkyl ethers such as polyoxyethylene behenyl ether and polyoxyethylene stearyl ether. Can be mentioned. The fatty acid mixture liquid A may contain one or more of these nonionic surfactants, and from the viewpoint of suppressing formation of a gel of fatty acid neutralized product and its aggregate, polyalkylene It is preferable to contain a glycol fatty acid ester, and it is more preferable to contain polyethylene glycol monostearate. The content of the nonionic surfactant in the fatty acid mixture solution A is preferably 0.5% by mass or more, more preferably 1% by mass or more, from the viewpoint of suppressing formation of a gel of fatty acid neutralized product and its aggregate. It is more preferably 1.5% by mass or more, and preferably 10% by mass or less, more preferably 5% by mass or less, and further preferably 3% by mass from the viewpoint of suppressing formation of gels of fatty acid neutralized products and aggregates thereof. , And more preferably 2% by mass or less.

The fatty acid-containing liquid A may contain a solvent, a cooling agent, a humectant, an antioxidant, an electrolyte, a nonionic surfactant and a surfactant other than soap, in addition to the fatty acid.

The basic raw material aqueous solution B contains an alkaline agent. Examples of the alkaline agent include sodium hydroxide, potassium hydroxide, amine compounds and the like. The basic raw material aqueous solution B preferably contains one or more of these alkaline agents. The content of the alkaline agent in the basic raw material aqueous solution B is preferably 5% by mass or more, more preferably 7% by mass or more, and further preferably 8. From the viewpoint of suppressing the formation of gels of fatty acid neutralized products and aggregates thereof. It is 5% by mass or more, preferably 50% by mass or less, more preferably 25% by mass or less, further preferably 15% by mass or less, and further preferably 10% by mass or less.

The basic raw material aqueous solution B may contain a water-soluble solvent. The water-soluble solvent can be used as long as it is a solvent having compatibility with water, but from the viewpoint of suppressing formation of a gel of a neutralized product of a fatty acid and its aggregate, one or two selected from polyols are preferable. As described above, one or more selected from glycerin and polyglycerin is more preferable, and glycerin is more preferable. The content of the water-soluble solvent in the basic raw material aqueous solution B is preferably 5% by mass or more, more preferably 10% by mass or more, and further preferably 20 from the viewpoint of suppressing formation of gels of fatty acid neutralized products and aggregates thereof. It is at least mass%, more preferably at least 30 mass%, preferably at most 50 mass%, more preferably at most 42 mass%, still more preferably at most 35 mass%.

The basic raw material aqueous solution B may contain an electrolyte, a surfactant, a chelating agent, etc., in addition to the alkaline agent and water.

The molar ratio of the number of moles of fatty acid in the fatty acid mixture liquid A to the number of moles of base in the basic raw material aqueous solution B (the number of moles of fatty acid in the fatty acid mixture liquid A/the number of moles of base in the basic raw material aqueous solution B) is From the viewpoint of producing a product, it is preferably 0.8 or more, more preferably 0.9 or more, and from the same viewpoint, preferably 1.2 or less, more preferably 1.1 or less.

The “jet flow state” in the present application means that the fatty acid mixture solution A is ejected from a hole arranged in the basic aqueous solution B to a wide region filled with the basic aqueous solution B, and droplets smaller than the pore diameter are formed. The state in which it is possible to visually confirm that diffusion occurs.

In addition, the fatty acid droplet size at this time is preferably 300 μm or less, more preferably 100 μm or less, further preferably 50 μm or less from the viewpoint of suppressing gelation and aggregates, and from the viewpoint of ease of manufacturing droplets. Therefore, it is preferably 0.1 μm or more, more preferably 1 μm or more, still more preferably 5 μm or more. The droplet size can be measured by the method described in Examples.

The mass flow rate X of the fatty acid-containing liquid A is preferably 0.5 kg/min or more, more preferably 0.7 kg/min or more, and further preferably 1 kg, from the viewpoint of suppressing formation of gels of fatty acid neutralized products and aggregates thereof. /Min or more, preferably 100 kg/min or less, more preferably 80 kg/min or less, further preferably 60 kg/min or less, and further preferably 50 kg/min or less from the viewpoint of reducing the load on the apparatus.

The linear velocity V _A of the fatty acid mixture solution A in the discharge direction is preferably 1 m/s or more, more preferably 2 m/s or more, and further preferably 2 from the viewpoint of suppressing the formation of gels of fatty acid neutralized products and aggregates thereof. It is at least 0.4 m/s, more preferably at least 2.8 m/s, and from the viewpoint of reducing the load on the device, it is preferably at most 50 m/s, more preferably at most 35 m/s, still more preferably at most 30 m/s. .. Here, the “linear velocity in the ejection direction” in the present application is the velocity of the liquid in the ejection direction of the ejection direction of the fatty acid mixture liquid A. Further, the absolute value of the linear velocity V _A of the fatty acid mixture liquid A is obtained by dividing the mass flow rate X of the fatty acid mixture liquid A by the density of the fatty acid mixture liquid A, and further dividing it by the area of the discharge hole. It is calculated by converting per second.

In the discharge part of the fatty acid mixture A, the relative linear velocity of fatty acid defined by the linear velocity difference obtained by subtracting the linear velocity of the basic aqueous solution B in the discharge direction of the fatty acid mixture A from the linear velocity in the discharge direction of the fatty acid mixture A. ΔV is preferably 1 m/s or more, more preferably 2 m/s or more, still more preferably 2.4 m/s or more, and further preferably 2. From the viewpoint of suppressing the formation of gel of fatty acid neutralized product and its aggregate. It is 8 m/s or more, and from the viewpoint of reducing equipment load, it is preferably 50 m/s or less, more preferably 35 m/s or less, and further preferably 30 m/s or less.

When the basic aqueous solution B is in a non-flowing state, as shown in FIG. 7A, the linear velocity V _B of the basic aqueous solution _B is 0 m/s. Direction linear velocity V _A. When the basic aqueous solution B is in a fluid state due to stirring or the like, the fatty acid relative linear velocity ΔV is as follows depending on the relationship between the discharge direction of the fatty acid-containing solution A and the flowing direction of the basic aqueous solution B. As shown in FIG. 7B, when the basic aqueous solution B flows at a flow rate V _B in a direction orthogonal to the discharge direction with respect to the fatty acid mixture solution A discharged at a flow rate V _A , the linear velocity V _B of the basic aqueous solution _B. Of these components, the component V _Bx =0 m/s in the discharge direction of the fatty acid mixture liquid A, the relative fatty acid linear velocity ΔV is also the linear velocity V _A of the fatty acid mixture liquid A in the discharge direction.

As shown in FIG. 7C, when the basic aqueous solution B flows at the flow rate V _B in the same direction as the discharge direction of the fatty acid mixture solution A discharged at the flow rate V _A , the fatty acid relative linear velocity ΔV is It is obtained by subtracting the linear velocity V _B of the basic aqueous solution B from the linear velocity V _{A of the} mixed solution A in the discharge direction. Alternatively, as shown in FIG. 7D, when the basic aqueous solution B flows at the flow rate V _B in the direction opposite to the discharge direction with respect to the fatty acid mixture solution A discharged at the flow rate V _A , the fatty acid relative linear velocity ΔV is is minus the sum of the linear velocity V _B of the basic aqueous solution B from the linear velocity V _a of the discharge direction of a fatty acid blend solution a.

As shown in FIG. 7E, when the basic aqueous solution B flows at a flow rate V _B from the front in the direction inclined with respect to the fatty acid mixture solution A discharged at a flow rate V _A , or as shown in FIG. 7F. When the basic aqueous solution B flows at the flow velocity V _B from the rear of the fatty acid mixture liquid A discharged at the flow velocity V _A , the fatty acid relative linear velocity ΔV is the discharge direction of the linear velocity V _a of, those obtained by subtracting the component V _Bx in the direction of ejection of the fatty acid blended solution a of the linear velocity V _B of the basic aqueous solution B. The discharge direction and the discharge direction of these fatty acid-containing liquids A can be freely set depending on the installation mode of the discharge nozzle 14.

Hereinafter, embodiments will be described in detail.

(Embodiment 1)
FIG. 1 shows a fatty acid neutralized product manufacturing apparatus 10 according to the first embodiment.

The fatty acid neutralized product manufacturing apparatus 10 according to the first embodiment includes a fatty acid tank 11 for storing the fatty acid mixture solution A, a base tank 12 for storing the basic aqueous solution B, and a base extending from the bottom of the fatty acid tank 11. And a fatty acid supply pipe 13 inserted and connected to the upper part of the tank 12. The fatty acid supply pipe 13 may be inserted and connected to the side portion or the bottom portion of the base tank 12. Each of the fatty acid tank 11 and the base tank 12 is provided with a stirring mechanism and a temperature control mechanism (not shown). A liquid feed pump P is provided in the fatty acid supply pipe 13, and a discharge nozzle 14 is attached to the tip of the fatty acid supply pipe 13 introduced into the base tank 12.

2A and 2B show the tip of the discharge nozzle 14. The tip of the discharge nozzle 14 is formed of a cylindrical tube end, and has a round hole-shaped discharge hole 15 having a hole diameter φ equal to the inner diameter of the tube. The diameter φ of the discharge hole 15 is preferably 0.5 mm or more, more preferably 0.7 mm or more, still more preferably 1 mm or more from the viewpoint of suppressing formation of gels of fatty acid neutralized products and aggregates thereof. From the viewpoint of suppressing the formation of a Japanese gel and its aggregate, it is preferably 20 mm or less, more preferably 15 mm or less, still more preferably 10 mm or less, still more preferably 5 mm or less, still more preferably 2 mm or less. As shown in FIGS. 3A and 3B, the tip diameter of the discharge nozzle 14 may be such that the hole diameter φ of the discharge hole 15 is smaller than the inner diameter of the pipe. In this case, the discharge hole 15 may be eccentrically provided, as shown in FIG. 4, instead of the center of the tip surface. Further, the tip of the discharge nozzle 14 may be formed in a hemispherical shape or the like, as shown in FIG. Further, the hole shape of the discharge hole 15 at the tip of the discharge nozzle 14 may be a slit shape as shown in FIG. 6A, an arc hole shape as shown in FIG. 6B, or the hole shape shown in FIG. 6C. It may be in the shape of an elongated triangular hole. When the discharge hole 15 has a non-circular shape in this way, the hole diameter φ corresponds to the diameter of an equivalent circle having the same area of the discharge hole 15.

Next, a method for producing a fatty acid neutralized product according to the first embodiment will be described.

The method for producing a fatty acid neutralized product according to the first embodiment includes a mixing step of mixing the fatty acid mixture liquid A and the basic aqueous solution B. In the mixing step, the fatty acid mixture solution A is jetted into the basic aqueous solution B in a jet state. Further, the mixing step is performed by causing the fatty acid mixture solution A to flow into the basic aqueous solution B in the base tank 12.

In the method for producing a fatty acid neutralized product according to the first embodiment, first, the fatty acid mixture liquid A and the basic raw material aqueous solution B are prepared as described above.

Next, the fatty acid mixture solution A and the basic raw material aqueous solution B are charged into the fatty acid tank 11 and the base tank 12, respectively. At this time, in the base tank 12, the discharge nozzle 14 is arranged in the basic raw material aqueous solution B. The liquid temperature of the fatty acid mixture liquid A and the basic raw material aqueous solution B is, for example, 40° C. or higher and 90° C. or lower. The liquid temperature of the fatty acid-containing liquid A in the fatty acid tank 11 is preferably 40° C. or higher, more preferably 50° C. or higher, further preferably 60° C. or higher from the viewpoint of suppressing formation of gels of fatty acid neutralized products and aggregates thereof. From the viewpoint of reducing the load on the apparatus, the temperature is preferably 90° C. or lower, more preferably 80° C. or lower. The liquid temperature of the basic raw material aqueous solution B in the base tank 12 is preferably 40° C. or higher, and more preferably 45° C. or higher, from the viewpoint of suppressing formation of gels of fatty acid neutralized products and aggregates thereof, thus reducing the load on the apparatus. From this viewpoint, the temperature is preferably 90°C or lower, more preferably 60°C or lower, and further preferably 50°C or lower. These liquid temperatures may be the same, different, or either. In addition, since the composition of the basic raw material aqueous solution changes when the fatty acid mixed solution is mixed, in the present application, both the initial basic raw material aqueous solution and the liquid obtained by mixing the fatty acid mixed solution are referred to as “basic aqueous solution”. ".

Then, the liquid feed pump P is operated to feed the fatty acid mixed solution A in the fatty acid tank 11 to the base tank 12 through the fatty acid supply pipe 13, and the fatty acid mixed solution A is basic from the discharge hole 15 at the tip of the discharge nozzle 14. The aqueous solution B is discharged in a jet state to mix the fatty acid mixture solution A and the basic aqueous solution B (mixing step). At this time, the fatty acid is neutralized with an alkaline agent to form a fatty acid neutralized product, and the fatty acid neutralized product is produced by batch operation.

The method for producing a neutralized fatty acid product according to Embodiment 1 includes a mixing step of mixing the fatty acid mixture liquid A and the basic aqueous solution B, and in the mixing step, the fatty acid mixture liquid A is mixed with the basic aqueous solution. When B is discharged in a jet state, it is possible to suppress the formation of the gel of the fatty acid neutralized product to be formed and the aggregate thereof. The effect of suppressing the formation of the gel of the fatty acid neutralized product and the aggregate thereof is that the fatty acid mixed solution A is dispersed in the basic aqueous solution B when the fatty acid mixed solution A is jetted to the basic aqueous solution B. It is speculated that the formation of Here, in order to form a jet flow, it is necessary to discharge the fatty acid mixture solution A in the basic aqueous solution B.

In Embodiment 1 and Embodiment 2 which will be described later, since the fatty acid mixture liquid A is discharged into the basic aqueous solution B by a batch operation, the number of moles of the base in the basic aqueous solution B is discharged in the initial stage of the reaction. The neutralization reaction is likely to proceed because it is in excess of the number of moles of the fatty acid in the fatty acid mixture solution A. However, in the latter stage of the reaction, a neutralized fatty acid product is formed in the basic aqueous solution B, and the base in the basic aqueous solution B is generated. It is considered that the reaction becomes difficult to proceed because the number of moles of is decreased. However, it is presumed that the fatty acid-containing solution A formed droplets to facilitate the reaction and suppress the formation of gel. The gel is presumed to be mainly agglomerated of unneutralized fatty acids.

When the fatty acid mixture solution A is discharged, the basic aqueous solution B may be in a non-fluid state in which the stirring mechanism of the base tank 12 is not operated or in a fluid state in which the stirring mechanism of the base tank 12 is operated. But it's okay.

The mass flow rate X of the fatty acid mixture liquid A is as described above.

At the discharge part of the fatty acid mixture A, that is, at the opening of the discharge hole 15 at the tip of the discharge nozzle 14, the linear velocity V _{A in} the discharge direction of the fatty acid mixture A is the gel of fatty acid neutralized product and its aggregates. From the viewpoint of suppressing formation, it is preferably 1 m/s or more, more preferably 2 m/s or more, still more preferably 2.4 m/s or more, further preferably 2.8 m/s or more, further preferably 10 m/s or more, It is preferably 20 m/s or more, more preferably 25 m/s or more, and from the viewpoint of reducing the device load, it is preferably 50 m/s or less, more preferably 35 m/s or less, and further preferably 30 m/s or less.

In the discharge part of the fatty acid mixture A, the relative linear velocity of fatty acid defined by the linear velocity difference obtained by subtracting the linear velocity of the basic aqueous solution B in the discharge direction of the fatty acid mixture A from the linear velocity in the discharge direction of the fatty acid mixture A. ΔV is preferably 1 m/s or more, more preferably 2 m/s or more, further preferably 15 m/s or more, further preferably 30 m/s or more, from the viewpoint of suppressing formation of gel of fatty acid neutralized product and its aggregate. From the viewpoint of reducing equipment load, it is preferably 50 m/s or less, and more preferably 35 m/s or less.

(Embodiment 2)
FIG. 8 shows a fatty acid neutralized product manufacturing apparatus 10 according to the second embodiment. The parts having the same names as those in the first embodiment are designated by the same reference numerals as those in the first and second embodiments.

The fatty acid neutralized product manufacturing apparatus 10 according to the second embodiment is the same as the fatty acid tank 11 for storing the fatty acid mixture solution A and the base tank 12 for storing the basic aqueous solution B, which extends from the bottom of the base tank 12 and is the same. The base pipe 12 is provided with a circulation pipe 16 inserted and connected to the side portion, a mixing unit 17 interposed in the circulation pipe 16, and a fatty acid supply pipe 13 extending from the fatty acid bath 11 and connected to the mixing unit 17. .. The circulation pipe 16 may be inserted and connected to the top or bottom of the base tank 12. Each of the fatty acid tank 11 and the base tank 12 is provided with a stirring mechanism and a temperature control mechanism (not shown). A first liquid feed pump P ₁ is provided in a portion of the circulation pipe 16 between the bottom portion of the base tank 12 and the mixing portion 17. The fatty acid supply pipe 13 is provided with a second liquid feed pump P ₂ .

FIG. 9 shows the mixing section 17. The mixing section 17 is composed of a double pipe in which the fatty acid supply pipe 13 is connected to the circulation pipe 16 and is inserted and concentrically provided. The inner diameter Φ of the circulation pipe 16 is preferably 10 mm or more, more preferably 15 mm or more, further preferably 20 mm or more, and more preferably 200 mm or less, from the viewpoint of suppressing formation of gels of fatty acid neutralized products and aggregates thereof. It is preferably 150 mm or less, more preferably 110 mm or less. When the flow passage shape of the circulation pipe 16 is non-circular, the inner diameter Φ corresponds to the diameter of an equivalent circle having the same flow passage area. Similar to the tip of the discharge nozzle 14 of the first embodiment, the tip of the fatty acid supply pipe 13 is formed of a cylindrical pipe end, and the hole diameter φ is a round hole-shaped discharge hole equal to the inner diameter of the fatty acid supply pipe 13. Have 15.

The hole diameter φ of the discharge hole 15 is preferably 0.5 mm or more, more preferably 0.7 mm or more, still more preferably 1 mm or more, from the viewpoint of suppressing formation of a gel of fatty acid neutralized product and its aggregate. It is 20 mm or less, more preferably 15 mm or less, and further preferably 10 mm or less. The fatty acid supply pipe 13 may be provided eccentrically with respect to the circulation pipe 16. Further, the tip portion of the fatty acid supply pipe 13 may have the same configuration as the modification of the tip portion of the discharge nozzle 14 of the first embodiment shown in FIGS. 3A and 3B, FIG. 4 and FIG. Further, the hole shape of the discharge hole 15 at the tip portion of the fatty acid supply pipe 13 also has the same configuration as the modified example of the hole shape of the discharge hole 15 at the tip portion of the discharge nozzle 14 of Embodiment 1 shown in FIGS. You may have.

Next, a method for producing a neutralized fatty acid product according to the second embodiment will be described.

The method for producing a fatty acid-neutralized product according to the second embodiment includes a mixing step of mixing the fatty acid-containing solution and the basic aqueous solution. Then, in the mixing step, the fatty acid-containing solution is jetted into the basic aqueous solution in a jet state. Further, the mixing step is performed by flowing the fatty acid mixture solution and the basic aqueous solution in a pipe.

In the method for producing a fatty acid neutralized product according to the second embodiment, first, the fatty acid mixture liquid A and the basic raw material aqueous solution B are prepared and charged into the fatty acid tank 11 and the base tank 12, respectively.

Then, the first liquid feed pump P ₁ is operated to circulate the basic aqueous solution B stored in the base tank 12 through the circulation pipe 16 so as to flow out from the bottom portion of the base tank 12 and return to the side portion. Further, the second liquid feed pump P ₂ is operated to feed the fatty acid mixture liquid A in the fatty acid tank 11 into the circulation pipe 16 via the fatty acid supply pipe 13, and the fatty acid mixture liquid A is converted into the fatty acid in the mixing section 17. The fatty acid mixture solution A and the basic aqueous solution B are mixed by jetting the basic aqueous solution B flowing in the circulation pipe 16 from the discharge hole 15 at the tip of the supply pipe 13 in a jet state (mixing step). Therefore, each of the fatty acid mixture solution A and the basic aqueous solution B is caused to flow in the circulation pipe 16 to perform the mixing step. Further, at this time, the fatty acid is neutralized with an alkaline agent to form a fatty acid neutralized product, and the fatty acid neutralized product is produced by batch operation.

In the discharge part of the fatty acid mixture liquid A, the ratio (Φ/φ) of the inner diameter Φ of the circulation pipe 16 through which the basic aqueous solution B flows to the hole diameter φ of the discharge hole 15 of the fatty acid mixture liquid A is the gel of the fatty acid neutralized product and From the viewpoint of suppressing the formation of the aggregate, it is preferably 4 or more, more preferably 5.5 or more, still more preferably 7 or more, preferably 30 or less, more preferably 20 or less, still more preferably 12 or less.

The mass flow rate X of the fatty acid mixture liquid A is as described above.

The mass flow rate Y of the basic aqueous solution B is preferably 5 kg/min or more, more preferably 7 kg/min or more, and further preferably 8 kg/min or more from the viewpoint of suppressing formation of gels of fatty acid neutralized products and aggregates thereof. From the viewpoint of reducing the load on the apparatus, it is preferably 1500 kg/min or less, more preferably 1000 kg/min or less, still more preferably 800 kg/min or less.

The ratio (Y/X) of the mass flow rate Y of the basic aqueous solution B to the mass flow rate X of the fatty acid blended solution A at the discharge part of the fatty acid blended solution A is (Y/X) from the viewpoint of suppressing formation of a gel of fatty acid neutralized product and its aggregate. Therefore, it is preferably 5 or more, more preferably 7 or more, still more preferably 8 or more, preferably 50 or less, more preferably 30 or less, still more preferably 20 or less.

The ratio (Y/X) of the mass flow rate Y of the basic aqueous solution B to the mass flow rate X of the fatty acid mixture solution A may be changed over time. It is preferable to increase (Y/X) once or more during the production from the viewpoint of suppressing the formation of a gelled product and shortening the production time. Specifically, the mass flow rate of the fatty acid blended liquid A is reduced after discharging preferably 60 mass% or more, more preferably 70 mass% or more, still more preferably 80 mass% or more of the total amount of the fatty acid blended liquid, or It is preferable to increase Y/X by increasing the mass flow rate of the basic aqueous solution B, or by performing both of them, from the viewpoint of suppressing the formation of a gelled product and shortening the manufacturing time. The amount of increase in Y/X is preferably 1 or more, more preferably 5 or more, from the viewpoint of suppressing the formation of a gelled product and shortening the manufacturing time, and preferably 20 or less, more preferably from the viewpoint of reducing the device load. Is 10 or less.

The ratio (Y) of the mass flow rate Y of the circulating basic aqueous solution B to the mass flow rate X of the fatty acid mixture solution A to be discharged so that the molar ratio (base/fatty acid) supplied to the jet field becomes large. By increasing /X), the reaction is facilitated and the formation of a gelled product is suppressed.

At the discharge part of the fatty acid mixture A, that is, at the opening of the discharge hole 15 at the tip of the fatty acid supply pipe 13, the linear velocity V _{A in} the discharge direction of the fatty acid mixture A is the gel of fatty acid neutralized product and its aggregate. From the viewpoint of suppressing the formation of 1), it is preferably 1 m/s or more, more preferably 2 m/s or more, still more preferably 2.4 m/s or more, still more preferably 2.8 m/s or more, and a viewpoint of reducing the device load. Therefore, it is preferably 50 m/s or less, more preferably 35 m/s or less, further preferably 30 m/s or less, further preferably 15 m/s or less, further preferably 13 m/s or less. The absolute value of the linear velocity _VA of the fatty acid mixture liquid A is obtained by dividing the mass flow rate X of the fatty acid mixture liquid A by the density of the fatty acid mixture liquid A and further dividing it by the area of the discharge hole 15 for 1 second. It is calculated by converting per hit.

In the discharge part of the fatty acid mixture A, the linear velocity V _B of the basic aqueous solution B in the discharge direction of the fatty acid mixture A is preferably 0.1 m from the viewpoint of suppressing formation of a gel of fatty acid neutralized product and its aggregate. /S or more, more preferably 0.2 m/s or more, further preferably 0.3 m/s or more, further preferably 0.4 m/s or more, and preferably 4 m/s or less from the viewpoint of reducing the load on the device. , More preferably 2 m/s or less, still more preferably 1.5 m/s or less. The absolute value of the linear velocity V _B of the basic aqueous solution B is obtained by dividing the mass flow rate Y of the basic aqueous solution B by the density of the basic raw material aqueous solution B, and further dividing it by the area inside the pipe of the circulation pipe 16 of the discharge hole 15. It is calculated by dividing the area by the flow path area minus the area and converting it per second.

In the method for producing a fatty acid neutralized product according to the second embodiment, similar to that shown in FIG. 7C in the first embodiment, the basic aqueous solution B flowing at the linear velocity V _B is mixed with the fatty acid in the same direction in the flowing direction. The liquid A is discharged at the linear velocity V _A. Thus, fatty acids relative linear velocity ΔV is equal to minus the linear velocity V _B of the basic aqueous solution B from the linear velocity V _A of the discharge direction of a fatty acid blend solution A. In this case, the fatty acid relative linear velocity ΔV is preferably 1 m/s or more, more preferably 2 m/s or more, and further preferably 2.2 m/s, from the viewpoint of suppressing formation of gels of fatty acid neutralized products and aggregates thereof. Or more, more preferably 2.4 m/s or more, further preferably 2.8 m/s or more, and preferably 50 m/s or less, more preferably 35 m/s or less, and further preferably from the viewpoint of reducing equipment load. It is 30 m/s or less, more preferably 15 m/s or less, and further preferably 13 m/s or less.

The other configurations and operational effects are the same as those of the first embodiment.

(Embodiment 3)
FIG. 10 shows the mixing unit 17 in the fatty acid neutralized product manufacturing apparatus 10 according to the third embodiment. The parts having the same names as those in the first and second embodiments are indicated by the same reference numerals as those in the first embodiment.

The mixing unit 17 is configured by vertically connecting the fatty acid supply pipe 13 to the circulation pipe 16. The opening of the fatty acid supply pipe 13 on the inner wall of the circulation pipe 16 constitutes a round hole-shaped discharge hole 15 having a hole diameter φ equal to the inner diameter of the fatty acid supply pipe 13. The fatty acid supply pipe 13 is connected to the circulation pipe 16 at the end of the fatty acid supply pipe 13 in which the diameter φ of the discharge hole 15 is the same as in the modification of the tip of the discharge nozzle 14 of the first embodiment shown in FIGS. 3A and 3B. It may be reduced to be smaller than the inner diameter of. Further, the hole shape of the discharge hole 15 at the end of the fatty acid supply pipe 13 connected to the circulation pipe 16 is a modification of the hole shape of the discharge hole 15 at the tip of the discharge nozzle 14 of Embodiment 1 shown in FIGS. You may have the same structure. Other configurations are the same as those of the fatty acid neutralized product manufacturing apparatus 10 according to the second embodiment.

In the method for producing a fatty acid neutralized product according to the third embodiment, as in the case of the second embodiment, the fatty acid neutralized product is produced by batch operation. At this time, similarly to the case shown in FIG. 7B in the first embodiment, the fatty acid-containing liquid A is discharged from the direction orthogonal to the flowing direction with respect to the basic aqueous solution B flowing at the linear velocity V _B. The relative linear velocity ΔV is equal to the linear velocity V _A of the fatty acid mixture solution A in the ejection direction.

Other configurations and operational effects are the same as those of the first and second embodiments. The preferable numerical range is the same as that of the second embodiment.

(Embodiment 4)
FIG. 11 shows a fatty acid neutralized product manufacturing apparatus 10 according to the fourth embodiment. The parts having the same names as those in the first and second embodiments are denoted by the same reference numerals as those in the first and second embodiments.

In the fatty acid neutralized product manufacturing apparatus 10 according to the fourth embodiment, a shearing unit 18 is provided in a portion of the circulation pipe 16 between the mixing unit 17 and the side portion of the base tank 12. The shearing part 18 has a part having a smaller flow passage area than the circulation pipe 16, and the basic aqueous solution B mixed with the fatty acid mixture A in the mixing part 17 is circulated to the part to give shearing. .. This makes it possible to more effectively suppress the formation of a gel of a fatty acid neutralized product produced by mixing the fatty acid mixture liquid A and the basic aqueous solution B and the aggregate thereof. The shearing unit 18 is composed of a device element such as a valve whose flow passage area is variable, from the viewpoint that the flow passage area can be freely set corresponding to combinations of various fatty acids and alkaline agents. Is preferred. However, the shearing unit 18 may be composed of a static mixer or the like having a fixed flow passage area.

Other configurations and operational effects are the same as those of the first and second embodiments. The mixing unit 17 may have the configuration of the third embodiment. The preferable numerical range is the same as that of the second embodiment.

(Other embodiments)
In the above-mentioned Embodiments 1 to 4, the method for producing a fatty acid neutralized product by a batch operation is shown, but the present invention is not particularly limited to this, and a fatty acid neutralized product producing apparatus 10 as shown in FIG. 12 is used. It may be a method for producing a neutralized fatty acid product by continuous operation. Specifically, in the fatty acid neutralized product manufacturing apparatus 10 shown in FIG. 12, the fatty acid supply pipe 13 a extending from the fatty acid tank 11 and the base supply pipe 13 b extending from the base tank 12 are respectively coupled to the mixing unit 17, and from the mixing unit 17. An extending recovery pipe 19 is inserted and connected to the upper part of the recovery tank 20. Then, the fatty acid mixture solution A and the basic raw material aqueous solution B are charged in the fatty acid tank 11 and the base tank 12, respectively, and the liquid feed pump P provided in each of the fatty acid supply pipe 13a and the base supply pipe 13b is operated to mix them. In the part 17, the fatty acid mixture solution A is jetted into the basic aqueous solution B in a jet state, and they are mixed to produce a fatty acid neutralized product, and the reaction solution C containing the fatty acid neutralized product is passed through the recovery pipe 19. It is continuously collected in the collecting tank 20. The preferable numerical range is the same as that of the second embodiment.

(Preparation of fatty acid mixture solution A and basic raw material aqueous solution B)
A fatty acid mixture liquid A was prepared according to the formulation shown in Table 1. In addition, a basic raw material aqueous solution B was prepared according to the formulation shown in Table 2-1.

The raw materials used are as follows.
Lauric acid Lunak L-98: Kao company myristic acid Lunak MY-98: Kao company palmitate Lunac P-95: Kao company monostearate polyethylene glycol Emanone 3199VB: Kao company 48% potassium hydroxide liquid liquid caustic ( 48%): Asahi Glass Co., Ltd. Glycerin Cosmetic concentrated glycerin: Kao

(Production and evaluation method of fatty acid neutralized product)
Using the fatty acid mixture liquid A and the basic raw material aqueous solution B, fatty acid neutralized products of the following Examples 1 to 9 and Comparative Example were produced. The respective results and manufacturing conditions are shown in Tables 3 and 4.

The evaluation was performed by the following method.

The presence/absence of the jet state was visually confirmed.

The presence or absence of gel was visually observed according to the following criteria.
None: At the time of producing the neutralized product of fatty acid, formation of gel of the neutralized product of fatty acid and its aggregate was not observed.
Some Yes: A small amount of gel of fatty acid neutralized product and its aggregate were formed.
Existence: Formation of gel of fatty acid neutralized product and its aggregate was clearly observed.

For Example 1, the fatty acid droplet size was measured. At this time, the basic raw material aqueous solution B was changed to the aqueous solution C shown in Table 2-2 in order to measure the droplet diameter of the fatty acid at the time of jetting. This is because when the basic raw material aqueous solution B is used, the fatty acid droplets formed by the jet flow disappear as the neutralization progresses, making it difficult to stably measure the droplet diameter. The aqueous solution C has a composition in which the mass ratio of glycerin to purified water is the same as the mass ratio of glycerin to purified water in the basic raw material aqueous solution B. Further, 1% of polyvinyl alcohol (GOHSENOL EG-05C: manufactured by Mitsubishi Chemical Corporation) was added to stabilize the diameter of the formed droplets.

The fatty acid-mixed liquid A was jetted into the aqueous solution C in a jet state, a part of the emulsion containing the formed fatty acid droplets was collected, and the droplet diameter was immediately measured. The results and manufacturing conditions are shown in Table 3.
Measurement condition:
(1) Measuring device: Laser diffraction type particle size measuring device "LA-960" (manufactured by Horiba Ltd.)
(2) Measurement conditions: Water was added to the measurement cell, and the volume median particle diameter (D ₅₀ ) was measured at a concentration such that the absorbance was in the appropriate range. The relative refractive index was 1.20, the temperature was 25° C., the circulation pump was ON, and the circulation speed was 5.

<Example 1>
A fatty acid neutralized product manufacturing apparatus 10 having the same configuration as that of Embodiment 1 is used, in which the discharge holes 15 of the discharge nozzles 14 are opened vertically downward, and the fatty acid mixture liquid is contained in the fatty acid tank 11 and the base tank 12, respectively. A and a basic raw material aqueous solution B are charged, and the fatty acid-containing solution A is jetted into the basic aqueous solution B stirred in the base tank 12 from the discharge hole 15 of the discharge nozzle 14 to produce a fatty acid neutralized product. did. Therefore, in the mixing mode of the fatty acid mixture liquid A and the basic aqueous solution B, the fatty acid mixture liquid A is discharged from the direction orthogonal to the flowing direction with respect to the basic aqueous solution B that flows by stirring, as in the case shown in FIG. 7B. To do. The molar ratio of the number of moles of fatty acid in the fatty acid mixture solution A to the number of moles of base in the basic raw material aqueous solution B was 1.01 (fatty acid/base).

In Example 1, the fatty acid droplet diameter was measured. Jetting was performed under the same conditions except that the basic aqueous solution B was changed to the aqueous solution C. The fatty acid droplet average diameter was 14.1 μm.

<Examples 2 and 3>
The fatty acid neutralized product manufacturing apparatus 10 having the same configuration as that of the second embodiment is used, and the fatty acid tank 11 and the base tank 12 are charged with the fatty acid mixture solution A and the basic raw material aqueous solution B, respectively, and circulated through the circulation pipe 16. A fatty acid-neutralized product was produced by discharging the fatty acid-containing liquid A in a jet state into the basic aqueous solution B from the discharge hole 15 in the double tube mixing section 17. Therefore, in the mixing mode of the fatty acid mixture liquid A and the basic aqueous solution B, the fatty acid mixture liquid A is discharged in the same direction as the flowing basic aqueous solution B as in the case shown in FIG. 7C. Is. The molar ratio of the number of moles of fatty acid in the fatty acid mixture solution A to the number of moles of base in the basic raw material aqueous solution B was 1.01 (fatty acid/base).

<Examples 4 to 8>
A fatty acid neutralized product manufacturing apparatus 10 having the same configuration as that of the above-described Embodiment 4, which is provided with a double pipe mixing unit 17 and a valve shearing unit 18 having the same configuration as that of Embodiment 2 above, The fatty acid mixture solution A and the basic raw material aqueous solution B are charged in the fatty acid tank 11 and the base tank 12, respectively, and the mass flow rate Y of the basic aqueous solution B is determined by the opening degree of the shearing unit 18 of the valve and the output of the liquid feed pump P2. A fatty acid-neutralized product was prepared by discharging the fatty acid-containing solution A in a jet state from the discharge hole 15 into the basic aqueous solution B which was circulated and circulated in the circulation pipe 16 in the mixing section 17 of the double pipe. In Examples 4 to 6, the molar ratio of the number of moles of the fatty acid in the fatty acid mixture solution A to the number of moles of the base in the basic raw material aqueous solution B was 1.01 (fatty acid/base). In Examples 7 and 8, the molar ratio of the number of moles of fatty acid in the fatty acid mixture solution A to the number of moles of base in the basic raw material aqueous solution B was 1.02 (fatty acid/base).

When Example 3 and Example 6 are compared, it is carried out under substantially the same conditions except for the flow rate ratio Y/X, but in Example 3, a little gel aggregate is observed in the obtained fatty acid neutralized product. On the other hand, in Example 6, no gel aggregate was found even though Y/X was small. It is considered that this is because the device of FIG. 11 of Example 6 has a shear applying part.

When Examples 4 to 6 were compared with each other, a small amount of gel aggregate was found in the obtained fatty acid neutralized product, which is considered to be because the flow ratio Y/X was as small as 7.0.

<Example 9>
The mass flow rate of the fatty acid blended liquid A was 61.5 kg/min from the start of charging until the discharge of 80 mass% of the predetermined charging amount, and the mass flow rate at the time of discharging 80 mass% of the predetermined charging amount during manufacturing. Was changed to 40 kg/min to produce a neutralized fatty acid, and the neutralized fatty acid was produced in the same manner as in Example 4 except that the mass flow rate of the basic aqueous solution B was constantly kept at 800 kg/min. The molar ratio of the number of moles of fatty acid in the fatty acid mixture solution A to the number of moles of base in the basic raw material aqueous solution B was 1.02 (fatty acid/base).

The ratio (Y/X) of the mass flow rate Y of the basic aqueous solution B to the mass flow rate X of the fatty acid mixture solution A to be discharged when 80% by mass of the predetermined amount of the fatty acid neutralized substance supplied to the jet field is discharged. ) Was 13 and the ratio after changing the mass flow rate was 20, and therefore the increase in Y/X was 7.

Comparing Examples 7 to 9, no gel aggregates were found in the obtained fatty acid neutralized products, but in Example 9 in which the flow rate ratio Y/X was changed during the production, the production time was short. did it. That is, since it is difficult to form gel aggregates immediately after the start of the reaction, by increasing the fatty acid flow rate to reduce Y/X and decreasing the fatty acid flow rate to increase Y/X in the latter stage of the reaction, gel aggregates are formed. It can be seen that the suppression suppresses the manufacturing time. The manufacturing times of Examples 7, 8 and 9 were 15.0 minutes, 9.0 minutes and 8.1 minutes, respectively, which were 46% and 10%, respectively, as compared with Examples 7 and 8. It was a% time reduction.

<Comparative example>
A fatty acid neutralized product is prepared by charging the above-mentioned basic raw material aqueous solution B into a liquid tank and pouring the above-mentioned fatty acid-containing solution A into the basic raw material aqueous solution B which is being stirred in the liquid tank from the pipe end having a pipe inner diameter of 80 mm. Was manufactured. At this time, the formation of gel of fatty acid neutralized product and its aggregate was clearly observed. The mass flow rate X of the fatty acid mixture solution A at this time corresponds to 40 kg/min and the linear velocity corresponds to 0.13 m/s, respectively.

INDUSTRIAL APPLICABILITY The present invention is useful in the technical field of a method for producing a fatty acid neutralized product.

10 Fatty Acid Neutralized Product Manufacturing Apparatus 11 Fatty Acid Tank 12 Base Tank 13, 13a Fatty Acid Supply Pipe 13b Base Supply Pipe 14 Discharge Nozzle 15 Discharge Hole 16 Circulation Pipe 17 Mixing Section 18 Shearing Section 19 Recovery Pipe 20 Recovery Tank A Fatty Acid Mixture B Basic raw material aqueous solution, basic aqueous solution C Reaction liquid P, P ₁ , P ₂ liquid feed pump

Claims (10)

A method for producing a fatty acid neutralized product, which comprises a mixing step of mixing a fatty acid-containing liquid and a basic aqueous solution,
In the mixing step, a method for producing a neutralized fatty acid product, wherein the fatty acid-containing liquid is jetted into the basic aqueous solution in a jet flow state. In the discharge part of the fatty acid mixture, the relative linear velocity of fatty acid obtained by subtracting the linear velocity of the basic aqueous solution in the discharge direction of the fatty acid mixture from the linear velocity in the discharge direction of the fatty acid mixture is 1 m/s or more. A method for producing a fatty acid neutralized product according to claim 1. The method for producing a neutralized fatty acid product according to claim 1 or 2, wherein a linear velocity in a discharging direction of the fatty acid mixed liquid is 1 m/s or more in a discharge portion of the fatty acid mixed liquid. The method for producing a neutralized fatty acid product according to claim 1, wherein in the jet state, fatty acid droplets are formed in the basic aqueous solution. The method for producing a fatty acid neutralized product according to any one of claims 1 to 4, wherein the mixing step is performed by causing the fatty acid mixture solution to flow in the basic aqueous solution. The method for producing a neutralized fatty acid product according to any one of claims 1 to 5, wherein the mixing step is performed by flowing each of the fatty acid mixture liquid and the basic aqueous solution in a pipe. The method for producing a fatty acid neutralized product according to claim 6, wherein the ratio of the mass flow rate of the basic aqueous solution to the mass flow rate of the fatty acid mixture solution is 5 or more in the discharge section of the fatty acid mixture solution. 8. The fatty acid neutralized product according to claim 6 or 7, wherein a ratio of an inner diameter of a pipe through which the basic aqueous solution flows is 4 or more with respect to a diameter of a discharge hole of the fatty acid mixture, in the discharge part of the fatty acid mixture. Manufacturing method. The method for producing a fatty acid neutralized product according to claim 6, wherein the ratio of the mass flow rate of the basic aqueous solution to the mass flow rate of the fatty acid mixture liquid is increased. The method for producing a fatty acid neutralized product according to claim 9, wherein the ratio of the mass flow rate of the basic aqueous solution to the mass flow rate of the fatty acid mixture solution is increased after discharging the fatty acid mixture solution by 60 mass% or more.

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