JPH0259094A - Ph control method - Google Patents

Abstract

PURPOSE:To remove impurities and to easily control pH by a method wherein a metal oxide component is mixed with amorphous carbon particles having a metal ion adsorbed thereby and the formed powder is brought into contact with water containing impurities to adjust said water to predetermined pH. CONSTITUTION:A powder obtained by mixing a metal oxide component with amorphous carbon particles having a metal ion adsorbed thereby is used as it is or subjected to secondary processing. Subsequently, said powder is brought into contact with water containing impurities or an org. solvent for a definite time not only to purity the solvent but also to neutralize the same or to restor the pH of the original solvent to control pH. As the concrete example of the aforementioned metal ion, there are Na, K, Mg, Ca, Cr, Ni, Mn or Zn and, as the concrete example of metal oxide, there are Al2O3, SiO2 or Fe2O3. By this method, simultaneously with the removal of impurities, pH can be controlled without charging chemicals.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention deals with water and unscrupulous agents that are contaminated with impurities and whose PH
This method relates to a method for purifying the PH when the pH changes, and for recovering the pH to 7, which is close to neutrality.

(Prior art) In the management of effluent flowing through pipes for industrial use or other purposes, the problems of PH, filtrate, and impurities are important for evaluating water quality and for the safety of pipes. This is an important issue. In many cases, the pH of water changes due to the presence of impurities.
On the other hand, it is also possible to change it for other purposes, and the methods for that purpose are to remove impurities or to adjust the pH by adding chemicals.

(Issues to be solved by investigation) The most effective method for removing non-B substances is to use all absorbing agents such as filtration or activation methods, but the purpose of these uses is Since it is not intended to control the pH, removing impurities that affect the pH will only make the LSI return to its original state.

On the other hand, when adjusting the pH in one diagram, acid or alkali chemicals are added. For example, L is used for cooling water in nuclear power plants.
i (OH) to control the concentration of OH ions, or to prevent water supply from corrosion by adding OH ions using calcium compounds.

This type of chemical injection method is the most effective means for chemically adjusting PHr with a single tnH, but in most chemical injection methods, ions on the opposite side always remain. In this case, this residue is an undesirable material.

In addition, in the case of the ``H Machine Liao Rule'' which is widely used in industry, foreign substances are mixed in during use and the surname changes to Kenjiang or 7 Lucari. In order to suppress this PHcl father 1, there is also (
It is important to remove impurities in the waxy solvent in order to prolong the use of the waxing agent, and it is better to remove the impurities from the waxy solvent by physically absorbing the porous material, such as using a furnace or an active method. Even after removing impurities, chemicals are added as needed to adjust the pH.

As described above, the conventional PH adjustment IIa technique involves exclusively injecting chemicals, and in doing so, the ions on the opposite side must be managed.

(Means for solving the problem) This research aims to solve the above problems.
Powder made by mixing amorphous carbon particles that handle 10,000 ions with one component of metal acid (hereinafter referred to as powder) is added to the powder or is subjected to secondary processing (hereinafter referred to as processed product). Then, this is brought into contact with impurity-containing water or -Vflx l storage agent (hereinafter referred to as the solvent including water) for 1lfJ for a certain period of time to purify the solvent and neutralize the PH, or to remove the original PHK from the LD scheme. It is characterized by hardening (hereinafter referred to as the preparation method including purification).

Inventive powder book manufacturing involves adsorbing metal ions onto amorphous particles, then mixing metal oxide components into the particles to prepare the powder, and then combining the powder with solid powder and solid powder. Non-oxides or oxides are produced by mixing with a carrier such as coal injection, solidifying with water or a binder, and then silently treating the mixture at a temperature below 800°C. The agent is amorphous
The R grade is crushed into a powder of approximately one size or less, mixed with an organic dispersant containing all metal ions to make the metal ions adsorb onto the surface of the powder particles, and dried at 500°C or less. Metal oxide particles of approximately 1 μm or less are removed during the process.
It is manufactured in large quantities.

(Function) In the present invention, a powder is used in which a metal oxide component is mixed with amorphous elementary particles that have adsorbed metal ions. Catalyst I
#, literally, is a substance with high physical and chemical absorption activity.

Although much is unknown about the chemical behavior of metal ions in an alkaline environment, it is known that they decompose water molecules and completely generate OH ions.

In addition, the contained substances A1903.5ICh, Flzoa
It will give a light to the PH change of the layer line.

The present invention is illustrated by the following fire barrel examples and experimental examples.

(Example 1) In FIG. 1A, l? This is the anti-admission tank for powder dispersant. Although the stirring system for the charging tank is not shown in the drawings, the inside of the tank can be stirred automatically or manually. If the stirring is left for a long time, the powder will settle to the bottom of the input tank, so the floating liquid will flow through the outlet 2 and the powder of the agent used will be removed through the drain port 3. However, when adding a dispersion liquid, there is often no discernible difference in the ratio of id dispersant to that of the solvent, and in this case, it must be carried out under conditions that allow i% to be reduced after stirring.

The appropriate amount to use depends on the amount used, but it has the ability to remove 1,009 to 200 soluble substances per liter of powder. Since 1 to 10% of powder is dispersed in the dispersion liquid, the final result is calculated by taking into account the content of powder.

However, after the impurities are removed, the pH becomes weakly alkali.

In the present invention, the solid or sheet-like processed product is brought into contact with the product using a mechanical flow, rather than a direct feeding method such as a powder book. Furthermore, unlike the case of adding powder, there is no need for a step of allowing sufficient contact time before rX and m separation, so it can be used repeatedly for a long time.

By the way, when processing a solid sheet into a sheet, it is different from the powder, so naturally the pH adjustment conditions are also different, so the absorption characteristics of each should be thoroughly investigated. Design of leaf materials and equipment.

Next, a method of adjusting pH using a processed solid product will be explained. There are many types of solid processed products depending on their shape, including granular, spherical, pellet, and honeycomb shapes.

These have Langmian suction type at room temperature, and the suction is >12.
The characteristics will be explained, but the suction speed will differ slightly depending on the shape.
g, about the size of a light. This is a little slower than conventional porous absorbents, such as the activation method. For this reason, in emergency situations, it is necessary to take various measures to process the necessary layer wires within the required time, but in the present invention, we have designed a process that can handle the inflowing layer wires, and It is designed to be incorporated into the device as appropriate.

11th B? 14 full-bore design, one element has a section 5 for solvent flow and temporary storage.
and a container 6 for holding the solid processed product, and the illustrated reli device is installed in the upper stage with 2 squares and the lower stage with 21 m1ld.

In this case, 7 is a weir plate for discharging between sections, 8 is an inflow pipe,
9 is the outflow pipe, and the common peak that flows in from the inflow pipe 8? 'i
It passes over the weir plate 7 and flows in the direction of the arrow in the direction of the arrow 67 and the gate 5, and from the upper stage to the lower stage, the same valley 1.2i4J25k
It flows and is discharged from the outflow pipe 9. In this device, the time layer line and the processed product are in close contact until the liquid level reaches the distance of the weir plate 7, and if the processed product container 6 is lined up, it can be made of something like a wire mesh, so the container does not interfere with contact. Note that the processed product container 6 can be attached to three positions in one element. In other words, when the specific gravity of the four substances contained in the solvent is greater than that of the solvent, the
Since the lower part of the 1n degree of the chaotic object is jealous, the installation position is below the middle.If the specific gravity is opposite, install it from the middle to the top.If there is no difference in any specific gravity, the first floor should be installed in the middle position. so that it is installed on the

By the way, the mounting position of the processed product container 6 as mentioned above is a sub-important factor that determines the contact time with the processed product for the removal of impurities in the solvent and pH adjustment of each element that receives this #&g6. becomes. In the illustrated example, the processed product container 6 can have the same shape, and instead of reducing the number of elements, the size of the elements can be increased. However, increasing the size of the dispersion liquid depends on the field conditions used, lowering the cost of the equipment, and lowering the cost of the equipment. Since the powder is dispersed, the kP-result is calculated by considering the layer containing the powder. Therefore, the pH of the alkali stripping solvent increases after the impurities are removed.

In the present invention, a solid or sheet-like processed product is not directly introduced like a powder, but is brought into contact using a flow of a solvent. In addition, since there is no need for steps such as loading the powder book, allowing sufficient contact time, and separating Em from it, it can be used repeatedly for a long time.

By the way, when sanding in the form of a solid or sheet, the sanding characteristics are different from those of powder O, so naturally the pH adjustment conditions are also different. After researching, we will design the materials and rent 1d.

First, we will explain the PH adjustment method using solid processed products. Solid processed products can be considered multi-sided due to their shape.
, granular, spherical, pellet shape, honeycomb shape, etc. can be considered.

The shoulder suction characteristics of these are explained by the Langmian/Rice layer equation at room temperature, but the bite speed differs somewhat depending on the valley shape. It is about hr. This is slower drying than conventional porous absorbent agents, such as active methods. For this purpose, various measures are required in order to process the necessary solvent within the required time, but in the present invention, the nilemens t'-, & corresponding to the inflowing tWK are calculated, In order to properly incorporate it into the equipment, it is possible to make some adjustments, but in this case, the contact between the molten μ and the processed product will be poor, so in an extreme case, the number of elements can be set to 11 and other equipment can be omitted. Sometimes.

(Containment row 2) Figure 2 shows the elements of the other rows, and the valleys that receive the solvent are omitted. At this time, the processed product 10 is packed into the enyamidani tank 11, and the inlet 12 and outlet 1 for the solvent.
3 is a lid with a gap that does not impede circulation. Honshiri elements are often used in folding systems where fluid pressure is applied to process the necessary amount of rope, so they are made with sufficient strength in mind.

(Kyoen row 3) This f/l is a sheet-shaped processed product, and the sheet-shaped processed product is made by grinding the abrasive powder even finer. That is, the powder, which has been subdivided into about 0.1 to 0.01 agK, is sufficiently stirred with water and heat and dried to form a paper or sheet-like material. Specifically, the M agent and the finely divided powder are gradually added to a slurry of sufficiently decomposed pulp and mixed.
The pulp slurry that has been subjected to A-corrosion is sent to the papermaking area to be made into paper.

In sheet-shaped processed products, the powder is further subdivided, so the specific surface area increases greatly. Therefore, the operator's speed and amount of suction to remove impurities in the solvent increases, but since the sheet is formed into a sheet, the amount of powder contained in a unit volume of sheet is not small.

'f, Figure 3 shows the above sheet-like processed product processed into a diagonal shape (lower sheet).Another corrugated sheet 14 is placed between the sheet 15 and the upper sheet 16. If the 140 wave shape is a mountain, for example, the enemy of the mountain is 62 between the length of sheets 15 and 16 and 30 bacteria, and the height of the mountain is 1.9 to 2.
．． 2 TW honeycomb processed product 17? The volume includes 50 to 70 y of finely divided powder.

In the present invention, basically, the sheet processing method described above or the sheet honeycomb is cut into a suitable size and the elements are used.

When packing a processed sheet product into a box, it is acceptable to cut out the sheet itself and roll it up, but it is also acceptable to cut sheet honeycomb to exactly the same size as the box and use it. In other words, the honeycomb stacked with several single honeycombs shown in Figure 3 is the fourth one.
Cut out and use this in the figure. If the number of elements is one, as in the case of using solid processed products, the third
A single honeycomb as shown in the figure may be used, or a laminated spiral honeycomb as shown in FIG. 4 may be used.

(Fuen Example 4) Figures 5 and 6 show the shape of a cylindrical honeycomb, and although the outer frame is not shown in the figure, an outer frame may be attached if necessary. . Using this method does not take into account the specific gravity of impurities in the incoming solvent, but as shown in Figure 7, one side of the solid body is cut off at a right angle, and the other half of the solid body is cut off. If the specific gravity of impurities in the solvent is low, use a processed product with a high degree of recitation, such as Processed Product 17, with the high M&' part facing downward and the light part facing upward.

For any of the secondary processed products, it is important at Tenkawa to control the excess amount of bath medium flowing into each element, and as a method for this control, a storage tank 18 as shown in No. 1-0 is prepared. At this time, the solvent flows from the inlet 19 and falls to the bottom, raising the liquid level. When the liquid level reaches a certain level, it is made to flow from the outlet 20 to the inlet 21 of the powder input tank 1 mentioned above as option 1d, or to the inlet 8 of the device 4. By the way, the inlet 19 of the storage tank 18
A large amount of bath medium flows in from the outlet 2, and the liquid level rises quickly.
If the flow rate from 0 is not satisfactory and the liquid level rises to point m22, an alarm will sound, and if the liquid level rises further, it will flow out from the outlet 23, but the normal By design, the outlet 20VC of the storage tank 18 is provided with a flow rate control pulp 24, so that the designed purpose can be achieved by constantly flowing the appropriate amount to the element.

The effects of the present invention will be further clarified in the following summary.

Experimental Example 1 The initial pH was adjusted by adding 1 g of powder to a mixture of 50 mg of water and 30 da of trichlorethylene.
We looked at how it changes over time, that is, the contact time.

At the same time, we looked at how the removal of trichlorethylene changed with the time of pH change. Fig. 8 shows the results in a graph, where Act 8A shows the change in pH and the dotted line shows the amount of trichlorethylene removed.

At first, the pH of the mixed solution was 6.4, but after 8 days the pH increased and showed no signs of corrosion.

At the same time, trichlorethylene was significantly removed during this time. The gradual increase in pH is due to the fact that the powder decomposes some of the water and increases the number of OH ions, and some of these OH ions are used to decompose trichlorethylene in a slow reaction.

This is why when the contact time is one week or more, the PH and trichlorethylene concentration, which remained unchanged for two days, start to change slightly. That is, since some OH ions are used to decompose trichlorethylene, the trichlorethylene temperature decreases and the pH value also decreases.

Chuocho Example 2 Benzine is often used as a stain removal solvent for dry cleaning, with hexane and hexane as the main ingredients. When benzene is used repeatedly at a dry cleaning factory, as it removes more and more dirt from clothes, it begins to turn red and becomes pink, and its cleaning power decreases, making it unusable.

Akami mainly removes pigment components from clothes, etc.9, which is then dissolved in a solvent as an ionic state.

In this way, when there are too many harmful substances in benzene, the PH4 value also decreases, so the number of ment to regenerate benzene is 8) and solid benzene in each element) 500 ft" valley 3tr
- Set the flow rate to l-e per minute or 70-1 per minute.
and poured it.

The degree of removal of impurities was judged by the degree of decolorization using a red eye, and the pH was measured at the same time. The results are shown in the missing table.

Table 1 Sample material: benzene containing unexpected objects Temperature: room temperature If: 5 g 1 carious tissue in Figure B 6 to 9 x 8 liters 3 Central test example 1 is for the case where water is contaminated with a certain amount of tetrachlorethylene. However, in this example, when pure tetrachlorethylene is used for dry cleaning, and as it removes the dirt, it also extracts Ca ions from the dry cleaning machine parts and is colored blue. I followed Akahi and PHi Nao. The device was the same one shown in Figure 1B as in Experimental Example 2:) Only the fJ1 element passed through t was measured. The flow velocity in this case is 1 jP
I met Ie/mis. The results are shown in the following table θ.

Table 2 Test conditions Sample material: Tetrachlorethylene containing impurities 1M degree: Normal
Filtration device: Fig. 1 B (Baby stage of the invention) The present invention is carried out as described above. , in contact with water; catalytically decomposes water molecules to form OH
While turning it into alkali injection by crystallizing ion Jt,
5I02 contained in powder, AezOs FI2os
Niyotsu-Cit 1ii El Exhibition 75 I feel like the whole thing is decreasing. In short, F3d' month is a device that can remove F111B\//J and at the same time check the pH without adding chemicals.

[Brief explanation of the drawing]

FIGS. 1A, B, and C illustrate &1. of the apparatus used in the present invention. Schematic drawing (partially cutaway), Fig. 2 shows -N of the element, Figs. 8 to 6 show the relief of the sheet-folded product, and Fig. 7 shows an example of the pond. The 8th figure shows the conversion of water contaminated with trichlorethylene, the caustic line is the pH change over time, and the dotted line is the removal of the same trichlorethylene and the temperature rises to 16°l...Powder supply tank 2...・Ball outlet 3...Drain port 6...Container lO...Processed product 14, 15, 16... 5II- Own section 7...Weir plate 11...Circular container sheet 18...・Storage Tank Diagram Diagram Diagram Diagram Procedure r Yamamasa IlH ・Display of 11 cases 1988 Special IFI' Application No. 210058 Name of invention PH adjustment method Name Keiji Asano Agent address f7i1 Yamayamaminami 1-cho 2-6

Claims (12)

[Claims] (1) Powder made by mixing metal oxide components with amorphous carbon particles that have adsorbed metal ions (hereinafter referred to as powder) is introduced as a powder or subjected to secondary processing (hereinafter referred to as processed product), This is brought into contact with water or an organic solvent containing impurities (hereinafter referred to as the solvent including water) for a certain period of time to purify the solvent and
A method for adjusting pH, characterized by neutralizing the pH or restoring it to the original pH of the solvent. (2) Metal ions are Na, K, Mg, Ca, Cr, Ni
, Mn, and Zn. (3) Metal oxides are Al_2O_3, SiO_2 and F
The method for adjusting pH according to claim 1, comprising e_2O_3. (4) Processed products are liquids (
2. The method for adjusting PH according to claim 1, further comprising a sheet using a dispersion liquid (hereinafter referred to as a dispersion liquid), pulp or nonwoven fabric, or a solid body thereof such as a honeycomb shape. (5) Claim 1, characterized in that it includes a method in which powder and dispersed liquid processed products are directly introduced into a solvent and stirred, and a method in which the processed products are made into an element with an appropriate amount and used as such. PH adjustment method described in . (6) The element determines the mounting position of the container containing the processed product or the method of packing the processed product based on the adsorption characteristics of each processed product and considering the relative specific gravity of the impurities contained in the solvent and the solvent. The method for adjusting pH according to claim 5. (7) Methods for using solid processed products include forming the processed product into a box or cylinder shape, or packing it into a container of the same shape and allowing the solvent to pass through it directly, and a container to receive the solvent. 7. A method according to claim 6, characterized in that the container containing the processed product is placed in or attached to the container by changing the vertical relationship of the attachment position according to the specific gravity of impurities contained in the solvent. How to adjust pH. (8) Form a sheet-like processed product into a honeycomb, pack the honeycomb horizontally or vertically into a box or cylindrical container, and install it in a container for receiving a solvent according to the specific gravity of impurities contained in the solvent. 7. The method for adjusting pH according to claim 6, further comprising changing the vertical relationship of the positions. (9) Connect elements using sheet honeycomb as appropriate so that the flow of solvent contacts each element in turn, and the PH in the solvent
Claim 8 characterized in that it adjusts and removes impurities.
PH adjustment method described in . (10) When the number of elements in the sheet honeycomb is one or two decimals, the sheet honeycomb is made into a cylindrical or prismatic shape without using a container for packing the sheet honeycomb, an outer frame is provided to support it, and a solvent is attached to the sheet honeycomb. 10. The method for adjusting pH according to claim 9, further comprising the step of flowing and passing through the pH. (11) When the sheet honeycomb is cylindrical, one side of it is cut off at right angles to the circular cross section of the cylinder, the cut out space is filled with other high-density processed products, and this is fixed with an outer frame or container and the solvent is removed. The flow is made to flow at right angles to the circular cross section,
11. The PH according to claim 10, characterized in that when the specific gravity of impurities in the solvent is heavier than the solvent, the high-density part is mounted downward, and in the opposite case, the high-density part is mounted upward.
How to adjust. (12) When the sheet honeycomb is formed into a thin plate-like honeycomb, it is rolled up into a cylindrical shape and an outer frame is attached around the cylindrical shape, so that the solvent flows at right angles to the circular cross section. 12. The method for adjusting pH according to item 11.