JP2010001451A - Method of producing aqueous detergent - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an aqueous inorganic detergent easy in handling and high in safety in consideration of environmental countermeasures such as those for reducing VOC and CO<SB>2</SB>which are the factors causing global warming. <P>SOLUTION: A method for producing an aqueous detergent includes a step of adding about 50 mmol% of disodium silicate nonahydrate (H<SB>2</SB>SiO<SB>2</SB>) 7 to raw water of purified water, forming an electrolytic solution with agitation if required, consecutively supplying nitrogen gas 8 into the electrolytic solution and simultaneously crushing bubbles with an ultrasonic wave oscillator 4, and a step of applying a high pressure to the inorganic disodium silicate nonahydrate (H<SB>2</SB>SiO<SB>2</SB>) contained in the liquid product to pulverize it and then producing a solution containing hyperfine bubbles (5 μm) by a homogenizer 12 of a homogenizing machine. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

Technology field

INDUSTRIAL APPLICABILITY The present invention manufactures an inorganic water-based cleaning agent considering environmental measures such as VOC and CO ₂ measures that do not contain any organic matter such as a surfactant intended to be used for degreasing cleaning of processed products such as automobiles, home appliances, and electronics industries Regarding the method.

Background technology

Conventionally, as an inorganic detergent, a composition of a detergent mainly composed of sodium metasilicate, potassium carbonate, sodium borate, and sodium sulfate is known. A method for producing the composition of this cleaning agent is to add a proper amount of sodium metasilicate, potassium carbonate, sodium borate, sodium sulfate, and the like to water at a temperature of 50 to 80 ° C. Is generally known to be effective.

On the other hand, salts and sodium metasilicate are added to the raw water to form an electrolyte solution, and air temperature (microbubbles) is generated in the electrolyte solution, and at the same time the temperature is adjusted to 15 to 20 ° C. from the viewpoint of maintaining solubility. There are a method and a cleaning agent for producing a solution containing ultrafine bubbles by taking a step of crushing bubbles with ultrasonic waves using an apparatus over 2 hours.

However, in the above-mentioned inorganic detergent composition, no cleaning effect is observed, but particles of the additive sodium metasilicate (40 to 50 microns) in the commercialized solution are present. At present, there is a demand for further improvement in order to obtain a long-term stable quality of the product due to being too large, a problem of stains generated after degreasing and cleaning, and an excellent rust prevention ability.
Patent 4064977 (9 pages)

Problems to be solved by the invention

The present invention solves the above-mentioned problems, and produces an aqueous cleaning agent to obtain a long-term stable quality of the product and a problem of stains generated after degreasing and excellent rust-preventing power with low environmental impact. The purpose is to find a way to solve the problem.

Means for solving the problem

An invention for solving the above-mentioned problems is that pure water is used as raw water, disodium silicate nonahydrate (H ₂ SiO ₂ ) is added to the raw water to form an electrolyte solution, and nitrogen gas is fed into the electrolyte solution. At the same time, the process of crushing bubbles with ultrasonic waves is performed for 30 minutes or more. In the subsequent process, high pressure is applied to inorganic disodium silicate nonahydrate (H ₂ SiO ₂ ) particles contained in the liquid product. By producing a solution containing ultrafine bubbles (5 microns) using a homogenizer, which is a pulverizing and homogenizing machine, the above-mentioned production method and long-term stable quality of products and after degreasing and cleaning are generated. It is a water-based cleaning agent characterized in that it can solve the problem of stains and has an excellent rust prevention ability.

In claim 1, disodium silicate nonahydrate (H ₂ SiO ₂ ) is added to pure water to make an electrolyte solution, and nitrogen gas is continuously fed into the electrolyte solution and at the same time, bubbles are crushed by ultrasonic waves to make fine A method for producing an aqueous cleaning agent, comprising at least a step of producing a solution containing bubbles.

As in the first aspect of the invention, in the second aspect, the amount of disodium silicate nonahydrate added is 10 to 90 mmol%.

In claim 3, the process of crushing bubbles with ultrasonic waves is performed for 30 minutes or more while the nitrogen gas is continuously fed, and the inorganic disodium silicate nonahydrate (H ₂ SiO ₂₎ contained in the liquid product in the subsequent process. 3) by producing a solution containing ultrafine bubbles (5 microns) by using a homogenizer which is a machine for pulverizing and homogenizing by applying high pressure to the particles of The manufacturing method of aqueous cleaning agent of description.

Next, in Claim 4, the aqueous cleaning agent obtained by the manufacturing method of the aqueous cleaning agent as described in any one of Claims 1-3.

The invention's effect

According to the present invention, disodium silicate nonahydrate (H ₂ SiO ₂ ) is added to pure water to obtain an electrolyte solution, and nitrogen gas is continuously fed into the electrolyte solution and at the same time, bubbles are crushed by ultrasonic waves. It is a machine that performs the process for 30 minutes or more, then applies high pressure to the inorganic disodium silicate nonahydrate (H ₂ SiO ₂ ) particles contained in the liquid product to pulverize and homogenize it. By producing a solution containing ultrafine bubbles (5 microns) using a homogenizer, long-term stable aqueous inorganic detergents mainly composed of disodium silicate nonahydrate (H ₂ SiO ₂ ) There is provided a method for producing a water-based cleaning agent which can solve the problem of quality and stains generated after degreasing and have excellent rust prevention ability.

BEST MODE FOR CARRYING OUT THE INVENTION

In the present invention, as shown in FIG. 1, disodium silicate nonahydrate (H ₂ SiO ₂ ) is added to pure water to obtain an electrolyte solution, and nitrogen gas is continuously fed into the electrolyte solution and at the same time by ultrasonic waves. The process of crushing the bubbles is performed for 30 minutes or more, and in the subsequent process, high pressure is applied to the inorganic disodium silicate nonahydrate (H ₂ SiO ₂ ) particles contained in the liquid product to pulverize and homogenize. And at least a step of producing a solution containing ultrafine bubbles (5 microns) using a homogenizer which is a machine that performs the above process.

The raw water used in the present invention is, for example, pure water obtained by using a reverse osmosis membrane water purifier NK-ML1 (manufactured by Nikken).

Disodium silicate nonahydrate (H ₂ SiO ₂ ) used in the present invention functions as a component of detergency and rust preventive power while using raw water as an electrolytic solution, and it belongs to sodium metasilicate. Hydrate has the property of being most easily dissolved in raw water when producing an electrolytic solution. The amount of disodium silicate nonahydrate (H ₂ SiO ₂ ) added is preferably 10 to 90 mmol% with respect to the total amount, but in general, in view of safety of alkalinity It is preferably about 50 mmol%.

In the production method of the present invention, disodium silicate nonahydrate (H ₂ SiO ₂ ) is added to pure water in a preferable range as described above, and an electrolyte solution is prepared while stirring as necessary. The process of crushing bubbles with an ultrasonic oscillator at the same time as the nitrogen gas continues to be fed into the inside is performed for 30 minutes or more, and the inorganic disodium silicate nonahydrate (H ₂ SiO ₂ ) contained in the liquid product in the subsequent process A solution containing ultrafine bubbles (5 microns) is produced using a homogenizer that is a machine that applies high pressure to the particles to pulverize and homogenize the particles.

In addition, as an ultrasonic oscillator, for example, by using a high-voltage ST transistor in US-12B (manufactured by US Mec Co., Ltd.) provided with an ultrasonic vibrator that irradiates ultrasonic waves and a sub-split plate type vibrator. It is highly efficient, lightweight and compact, and has a function of adjusting the resonance frequency and output power of the vibrator and is easy to use. The frequency of the irradiated ultrasonic wave is preferably around 30 KHz.

In the production method of the present invention, from the point of further exerting the effect of the present invention, when a bubble generation method using air as a bubble generator is used, a large amount of oxygen (O ₂ ) in the air is contained in the electrolyte solution. Since the electrolyte solution is easily oxidatively deteriorated because it is blown, it becomes an unstable factor in terms of long-term quality stability of the product. Use a homogenizer that is a machine that pulverizes and homogenizes by applying high pressure to inorganic disodium silicate nonahydrate (H ₂ SiO ₂ ) particles contained in the liquid product in the subsequent process. Of an inorganic aqueous detergent mainly composed of disodium silicate nonahydrate (H ₂ SiO ₂ ) by producing a solution containing ultrafine bubbles (5 microns). It is possible to produce a long-term stable quality and water-based cleaning agent that can solve the problem of stains generated after degreasing and have excellent rust prevention ability.

In order to enhance the effect of the present invention, it is preferable to carry out the step of crushing bubbles by ultrasonic waves at the same time that the above-mentioned nitrogen gas is continuously fed, and the inorganic silica contained in the liquid product in the subsequent step. The manufacturing process of a solution containing ultrafine bubbles (5 microns) using a homogenizer is a machine that applies high pressure to particles of disodium acid nonahydrate (H ₂ SiO ₂ ) and pulverizes and homogenizes the particles. It is preferably about 1 hour, and the temperature of the raw water (electrolyte solution) during these steps may be room temperature throughout the year.

Thus, it was confirmed that the produced disodium silicate nonahydrate (H ₂ SiO ₂ ) -containing solution has an alkalinity (pH) of 12.8 to 13.2. This reference value is shown as a strongly alkaline aqueous cleaning agent.

The produced solution is transferred to a product storage tank through a filtration filter, and is subdivided into a predetermined amount of an inorganic aqueous cleaning agent from the product storage tank.

Embodiment 1
An embodiment of the present invention will be described with reference to the accompanying drawings. As shown in FIG. 1, the manufacturing method of the present invention removes insoluble impurities and residual chlorine by being supplied to a reverse osmosis membrane water purification device 3 via a regulating valve 2 of raw water (tap water) 1. It is injected into the dissolution tank 15 in a batch format. 50 mmol% of disodium silicate nonahydrate (H ₂ SiO ₂ ) is added to the raw water in the dissolution tank 15 and stirred as necessary, and the nitrogen gas 8 is continuously fed and at the same time the frequency of 30 KHz by the ultrasonic oscillator 4. The step of conducting bubbles to the sub-split plate vibrator 5 to crush bubbles is performed for about 30 minutes. Further, the transfer pump 10 is a machine that applies high pressure to the particles of inorganic disodium silicate nonahydrate (H ₂ SiO ₂ ) contained in the liquid product in the subsequent process to pulverize and homogenize the particles. The process for producing a solution containing ultrafine bubbles (5 microns) is sent to a certain homogenizer 12 and takes about 1 hour. The temperature of the raw water (electrolyte solution) during these steps may be room temperature throughout the year. The aqueous cleaning agent thus prepared is measured for alkalinity (pH), checked to a predetermined reference value, and subdivided into inorganic aqueous cleaning agents to obtain products.

The inorganic water-based cleaning agent produced by the method of the present invention does not contain any organic substances such as surfactants that are diluted to 1 to 30% and used for degreasing cleaning of processed products such as automobiles, home appliances, and electronic industries. Not. In addition, this aqueous detergent has excellent detergency, no foaming, strong rust prevention, good oil / water separation, easy waste liquid treatment after use, long-term stable quality and degreasing cleaning It is an inorganic water-based cleaning agent that solves the problem of stains that occur later. In addition, it is possible to provide an inorganic water-based cleaning agent that is easy to handle and highly safe in consideration of environmental measures such as VOC and CO ₂ countermeasures, which are one cause of global warming.

Schematic of the manufacturing process of the aqueous cleaning agent of this invention. Test table for dissolution performance with homogenizer

Explanation of symbols

1. Raw water Adjustment valve Reverse osmosis membrane water purification device 4. 4. Ultrasonic oscillator Sub-split plate vibrator 6. Dissolution tank 7. Disodium silicate nonahydrate (H ₂ SiO ₂ )
8). Nitrogen gas 9. Transfer valve 10. Transfer pump 11. Filtration filter 12. Homogenizer 13. Filtration filter 14. Supply valve 15. Product (cleaning agent)

Claims (4)

Disodium silicate nonahydrate (H ₂ SiO ₂ ) is added to pure water to make an electrolyte solution. Nitrogen gas is continuously fed into the electrolyte solution, and at the same time, bubbles are crushed by ultrasonic waves to obtain a solution containing fine bubbles. The manufacturing method of the aqueous | water-based cleaning agent characterized by including the process to manufacture at least. The method for producing an aqueous detergent according to claim 1, wherein the amount of disodium silicate nonahydrate added is 10 to 90 mmol%. The process of crushing bubbles with ultrasonic waves at the same time as feeding nitrogen gas is performed for 30 minutes or more, and the inorganic disodium silicate nonahydrate (H ₂ SiO ₂ ) particles contained in the liquid product are high in the subsequent process. The aqueous cleaning agent according to any one of claims 1 to 2, by producing a solution containing ultrafine bubbles (5 microns) using a homogenizer which is a machine for pulverizing and homogenizing by applying pressure. Manufacturing method. An aqueous cleaning agent obtained by the method for producing a cleaning agent according to any one of claims 1 to 3.

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