JPH01224089A - Method for adsorbing ionic dye dissolved in water - Google Patents

Abstract

PURPOSE:To efficiently attain dyeing with a color tone of required density in a short time by dissolving an ionic dye in water, adding more than prescribed times as much silica gel as the dye to the water and bringing a fibrous material into contact with the resulting dyeing liq. CONSTITUTION:When a fibrous material is dyed with an ionic dye, the dye is dissolved in water by an amt. necessary for dyeing with a color tone of required density, more than about 3.5 times as much silica gel as the dye by weight is added to the water and the fibrous material is dyed with the resulting dyeing liq. Dyeing with a color tone of required density can be efficiently attained in a short time and the unreacted dye is nearly prevented from remaining in the residual dyeing liq.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a treatment method for adsorbing ionic dyes dissolved in water by textile materials.

Conventional technology The dyeing residue, or dyeing wastewater, generated from the textile dyeing process contains various dyes dissolved in it, and advanced wastewater treatment is required to prevent contamination of the rivers, lakes, marshes, and oceans along the drainage route.
Even after removing pollutants such as BOD (Biochemical Oxygen Demand) and COD (Chemical Oxygen Demand), the problem of coloration remains, and expensive activated carbon treatment and ozone oxidation treatment are forced. There is.

On the other hand, there is also a need for a dyeing method that is quick and has high adsorption efficiency in the process of dyeing textile materials, and although some dyeing aids have been developed, they are not necessarily sufficient, especially when dyeing deep colors. In some cases, a high concentration of dye must be reacted and adsorbed onto the textile material, and the dyeing process must be repeated several times by replacing the dye liquor with a new one.Therefore, a large amount of dye must be used, resulting in high costs. become.

Furthermore, since the number of times of dyeing is increased, the work is complicated. At the same time, a large amount of dyeing wastewater is generated, increasing the burden of wastewater treatment.

Problems to be Solved by the Invention In view of the above-mentioned problems, an object of the present invention is to efficiently achieve dyeing with a desired density of color in a short period of time, and to substantially eliminate unreacted dye from remaining in the dyeing residue. This is an adsorption treatment for ionic dyes dissolved in water, which can reduce the amount to 0% and completely remove dyes that remain dissolved in dyeing wastewater generated from dyeing processes using conventional methods. The purpose is to provide a method.

Means for Solving the Problems The present invention involves adding silica gel in an amount equal to or more than 3.5 times the weight of the dissolved dye to water in which an ionic dye is dissolved, and then adding lJ! This is a method for adsorption treatment of ionic dyes dissolved in water, characterized by bringing them into contact with heavy substances.

Function Silica gel has long been used in paints, adhesives, pharmaceuticals, cosmetics, etc., but we have studied its characteristics and iJI! , 1 was found to be effective in the reaction with dyes. Of course, in this case, it was found that it was necessary to coexist approximately 3.5 times more silica gel than the dissolved dye.

The present invention provides a method for dyeing a 1Jli tlt material with an ionic dye, which is necessary for coloring and developing a desired color tone density.
A star dye approximately equal to t) is dissolved in the dyeing solution, and silica gel in an amount of about 3.5 times the weight of the dye or more is added to the dyeing solution. Thereafter, the chromosomal textile material is treated with the dyeing solution prepared as described above.According to the method of the present invention, almost all of the dye dissolved in the dyeing solution is converted into the textile material in a short period of time. After adsorption, almost no dye remains in the dyeing residue, resulting in a nearly colorless transparent liquid, with only a slight white precipitate of silica gel, ie, so-called white carbon, remaining.

In addition, the present invention involves adding and stirring silica gel in an amount of 3.5 times or more of the estimated amount of dye dissolved in the wastewater to the dyeing wastewater produced by the conventional method, and then dyeing wool, silk, nylon, acrylic, cotton, cellulose, etc. ! ! 1. Introduce all fiber materials into a container and bring the dyeing wastewater into contact with the fiber materials. The dye that dissolves in dyeing wastewater is the above-mentioned fiber t.
It reacts with the +fi group in a short time and the dye in the wastewater is completely removed. If the type of dye contained in the dyeing wastewater is known, it is only necessary to select the m fibers that react with the 8M dye↑1.To increase the wastewater treatment speed, it is necessary to heat the dyeing wastewater. Just raise the temperature.

Silica gel has many hydroxyl groups on its surface and has a strong affinity for water, and it is very easy to bond with molecules that have hydrogen-bonding end groups such as hydroxyl groups (-OH) and amino groups. form a bond. Therefore, the dye is effectively 1lIl
It can be reacted with fiber constituent molecules.

In carrying out the present invention, it is desirable that the average particle size of the silica gel is 1 to 10 microns. If the average particle size is smaller than this range, that is, the average particle size of silica gel is less than 1 micron, the silica gel will remain in the textile material. This is because it becomes difficult to achieve the desired effect.

In addition, in the present invention, it is preferable to use silica gel having 2.5 to 3% or more of hydroxyl groups on the surface, and the inventor has found that the effect of the present invention cannot be achieved if the amount is 2.59 g or less. confirmed.

Depending on the dye used for dyeing and the dye to be treated as waste liquid, the hydroxyl groups on the surface of the silica gel used are treated with 1T organic or inorganic substances as necessary.It is also useful for adjusting the FIH of the dye solution added by so-called masking treatment. - The effectiveness of the layered invention can be increased.

The price of the silica gel used in the practice of the present invention is less than one-tenth of the i rating of the -m dye, and even if silica gel is used at least 3.5 times the weight of the dye, the chromogen 'F The cost is much lower than conventional methods.

The present invention is not only effective in reducing the dye consumption per unit, but also exhibits an effect in reducing the amount of dye more than the conventional method even when the temperature of the dyeing process is lower than that of the conventional method.

Furthermore, in the case of deep color dyeing, it is possible to achieve the desired density in a short time in one step without having to carry out double or triple dyeing as in conventional methods, so this method is extremely efficient in terms of productivity.

In other words, if the method of the present invention is adopted in the dyeing process, it will be extremely effective in reducing dye costs, reducing thermal energy, reducing dyeing time, and improving productivity. Since there is almost no dye waste, it is possible to solve the problem of contamination of the drainage route due to dyeing waste liquid, and it is possible to extremely simplify the wastewater treatment process. In addition, the method of the present invention makes it possible to completely remove the residual stain f1, which goes a long way toward solving the pollution problem.

The π pattern of the present invention will be explained with reference to an embodiment as follows.

Example 1 Suminol Milling Black V L G (trade name) dyeing film was dissolved in water to a concentration of 1526 OWF, and silica gel with an average particle size of 2.5 microns was dyed. Add to the dye fl solution water and stir to make a bath ratio of 1゛1.
The temperature was adjusted to 80° C. to dye silk habutae. On the other hand, as a blank, a dye iα to which no silica gel was added was prepared using the same strips as 7I and stained.

When the dyeing time was 15 minutes, the blank had a deep blue color with a tinge of blue, but when the method of the present invention was used, the color was pure black, which is called the so-called crow's feather color.

In addition, for both staining residues, the blank was black and clearly showed the residual stain ↑1, but the staining residue α obtained by the method of the present invention was almost colorless and transparent, indicating the presence of white precipitates of silica gel;
I got hit twice.

Example 2 Using the same dye 1'l as in Example 1 and using silk as the chromosome, the dyeing TEI concentration (OW F ) and staining of the dye liquors of the method of the present invention and the method not using silica gel (blank) Cloth color density (K/S) [KUBEL
The relationship between [ ] calculated from the reflectance of the dyed cloth using the formula K A - M U N K was determined by experiment, and the results are as shown in the drawings.

In other words, when ○WF is 5%, the blank I/S(
22 in the drawing) is 7.5, whereas the K of the present invention is 7.5.
/S (see ll in the drawing) was 18, indicating that the dye T1 absorption efficiency was much higher.

For reference, K when the same silica gel as in Example 1 is set at 3.0 times the weight of the dye or less.
/S value is indicated by the two-dot chain line 13 in the drawing.

Example 3 The black dye residual liquid of field 6 used in the blanks of example 1 and run 1!1112 was about 61. Since the dye negativity in this residual liquid is estimated to be 0.12≦, approximately 4 times the amount of silica gel as the amount of residual slag was added to the residual liquid, and then heated and stirred at approximately 4°C. Height: 50 cm Diameter: 5 cm
Silk thread was stuffed into a glass tube of 1.0 m, and the previously prepared dyed residue iα was allowed to flow down the glass tube at a concentration of 50 rnl/min. The water discharged from the tube was almost colorless and transparent.
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Example Z1 A comparison was made between the silica gel used in the method carried out in Example 1 with an average particle diameter of 2.5 microns and the silica gel with an average particle diameter of 13 microns. The color is pure black, which is similar to the color of a crow's wet feathers, and compared to Shishita, when silica gel with an average particle size of 13 microns was used, uneven dyeing was seen on the dyed cloth, and the dyeing density was slightly indigo. The staining residue is black, and the dyeing ↑:l! It was observed that the absorption and adsorption effect of the a-fiber material was poor.

Effects of the Invention As described above, according to the present invention, there is provided a method that very significantly improves the efficiency of the adsorption reaction between the ionic bundle material 1 and the fiber material. Not only is it extremely effective in reducing dyeing costs by eliminating the complexity of conventional double and triple dyeing in color dyeing, but it also eliminates almost all the residual amount of dye 4 in the dyeing residue, which helps prevent pollution. It has also failed as a countermeasure for the source. Furthermore, as described in detail, it is also highly effective in treating dyeing wastewater.

[Brief explanation of the drawing]

The drawing is a graph showing the experimental results of Example 2, and 1M
The axis is the dye concentration in the dye bath (%0WF), the vertical axis is K/S
It shows the value. Solid line in the graph! 1 indicates the method of the present invention, dashed line 12 indicates a blank, and chain double-dashed line 13 indicates the K/S value when the amount of silica gel of the present invention is set to be 3.0 times or less the weight of dye marker 1, respectively. Agent Patent Attorney Keiichi Nishikyo

Claims (1)

[Claims] 3.5 of the weight of dye dissolved in water containing ionic dye
1. A method for adsorption treatment of ionic dyes dissolved in water, which comprises adding silica gel in an amount more than double the amount and then bringing it into contact with a fiber material.