JPH08168607A - Cutting oil flocculating treatment agent - Google Patents

Abstract

PURPOSE: To rapidly advance the separation of cutting oil due to colloid flocculation extremely improve the separation capacity and obviate the post treatment by specifying a compsn. of flocculation active components. CONSTITUTION: A cutting oil flocculating treatment agent has a compsn. containing 10-60wt.% of ferrous sulfate, 10-30wt.% of calcium hydroxide, 1-10wt.% of potassium sulfate, 1-10wt.% of magnesium sulfate, 1-10wt.% of silicate and 0.5-5wt.% of an amphoteric surfactant as flocculation active components. Ferrous sulfate has function making colloid hydropholic to accelerate the flocculation thereof and calcium hydroxide has function making colloid hydrophobic to accelerate the flocculation reaction thereof and adjusting pH. Potassium sulfate receives the aid of the amphoteric surfactant to show strong neutralizing power against positive charge and magnesium sulfate plays the role of a hydrophobic precipitant. Silicate such as a zeolite powder and the amphoteric agent become an alkali metal salt by hydration reaction to show ion exchange capacity.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting oil aggregating treatment agent. More specifically, the present invention relates to a new flocculating agent useful for separating colloidal waste of cutting oil.

[0002]

2. Description of the Related Art Conventionally, various flocculants have been used to effectively separate the solid content of colloidal particles from colloidal wastes resulting from the use of cutting oil. An ionic polymer flocculant is known as a typical example. Also, as an inorganic type, an aluminum chloride type is known.

However, in the case of the aggregating agents known so far, the colloid aggregating action is not always satisfactory, and there are drawbacks that the aggregating speed is slow and the solid content separating ability is not sufficient. Further, in the case of the conventional polymer-based coagulant, there is a problem that a separate disposal process of the polymer itself is required. Therefore, as a solution to these conventional drawbacks, it has been desired to realize a new cutting oil colloid aggregating agent that has a remarkable effect of aggregating and separating and does not require post-treatment.

The present invention has been made in view of the above circumstances, and provides a new cutting oil aggregating agent which is excellent in the aggregating and separating action as described above and which does not require post-treatment. It is an object.

[0005]

In order to solve the above-mentioned problems, the present invention provides a flocculation active ingredient, in terms of weight percentage, of ferrous sulfate 10-60 calcium hydroxide 10-30 potassium sulfate 1-10 sulfuric acid. Provided is a cutting oil aggregating treatment agent having a composition of magnesium 1-10 silicate 1-10 zwitterionic activator 0.5-5.

[0006]

With the above composition, the present invention realizes quick aggregation and more efficient separation of colloidal particle solids. Further, the characteristics of the cutting oil and the action of the individual components of the treatment agent of the present invention will be described in detail below. Properties of cutting oil colloid The colloid in the liquid repels each other due to the zeta potential and the electric double layer, and is dispersed and suspended without being affected by gravity due to the Brownian motion. Furthermore, hydrogen bonds are seen between water molecules due to the inclusion of oil and fat components.

The electric double layer also maintains each colloid with a large repulsive force. The principle of cohesive hydrophobization (irreversibility) The rational method of destroying the strong poles of water molecules attached to the colloid is to neutralize the charge of the particles with a larger force to reduce the distance between particles, and van Inhalation is carried out according to Wars's law, and at the same time, mutual attraction by positive and negative ion exchange activators, ionic surfactants, etc. is caused, and colloidal fine particles and bound water molecules are destroyed by strong collision bonding of isomer charges to form free water. Tighten the colloid to make it hydrophobic.

What has been developed to enhance this function is
It is the treating agent of the present invention as a positively charged inorganic electrolytic agent. Drug response and effect a. Ferrous sulfate hydrates to form a hydroxide salt, and the basic oxide, which is the main component, acts to compress the electric double layer of the colloid and reduce the thickness of the layer.

The ionic polymer SO ₄ ^{2+, which} is produced at the same time as the hydroxide salt, is polymerized with each ion produced from other components to cause a strong mutual attraction action. Next, strong collision bonding of isomer charges occurs due to the ionic surfactant, destroying the shell of the electric double layer and neutralizing the charges. As a result, the bound water molecules become free water, which promotes aggregation and hydrophobization of the colloid. b. Calcium hydroxide Calcium ion is generated by the hydration reaction, and the addition of ferrous sulfate causes an interaction with Ca ₄ ²⁻ ion to SO ₄ ²⁺ ion which is sprinkled in the acidified area due to the decrease of PH. To produce CaSO ₄ ²⁺ .

As a result, the aggregation reaction and the hydrophobization are promoted, and at the same time, the pH is adjusted. c. Due to the hydration reaction, potassium sulphate and magnesium sulphate potassium have a counterion valency of 2 for negative charges
Acts as an ionic surfactant. Behaves strongly as a flocculant against positive charges. The zwitterionic activator assists this (having about 7 times the effect against negative charge) and has a strong neutralizing power against positive charges.

On the other hand, magnesium turns into magnesium hydroxide by a hydration reaction and serves to bind the floc particles formed by the polymerized ions of each drug, and forms a large floc together with the ionic activator and at the same time acts as a hydrophobic precipitant. d. Silicates such as zeolite powder and zwitterionic activator silicates become alkali metal salts by hydration reaction and have polar adsorption, catalytic action and ion exchange ability, and prevent harmful effects of acidic ions, alkali ions, etc. The clarity of the clear water should be good. It also has the effect of pushing down the overall PH, and also works to bring out the activation effect of calcium ions.

On the other hand, the zwitterionic activator dissociates into both anions and cations depending on the pH of the treated water due to its exchange ability, and strongly acts as an anion on the alkaline side, a cation on the acidic side, and a nonion on the neutral side. At the same time large flock is formed. It also has the ability to disperse dyes and exerts a clear water action together with zeolite.

The aggregating treatment agent of the present invention having such an action has the composition ratio as described above, or more preferably ferrous sulfate 40 to 55 calcium hydroxide 20 to 30 potassium sulfate 4 to 8 sulfuric acid. Magnesium 4 to 8 Silicic acid salt 4 to 8 Zwitterionic activator 1 to 3

This aggregating treatment agent is used in the form of powder, granules or the like. In that case, it may be added in divided portions or may be added to the target treated material all at once. Further, each of the above-mentioned components may be partially combined into a composite. More preferably, for example, ferrous sulfate is added first, and then the rest are added and mixed with stirring.

The present invention will be described in more detail below with reference to examples. Of course, the present invention is not limited by the following embodiments.

[0016]

EXAMPLE A flocculant having the composition shown in Table 1 was added to a used plant-based cutting oil according to the procedure shown in Table 2. For comparison, a commercially available organic polymer ion coagulant was also added separately.

[0017]

[Table 1]

[0018]

[Table 2]

When the action and effect of the aggregated hydrophobic agent of the present invention and that of the polymeric ion aggregating agent are compared, as shown in Table 3 below, the one of the present invention was extremely excellent.

[0020]

[Table 3]

[0021]

As described in detail above, according to the present invention, the separation of the cutting oil by the colloid agglomeration progresses rapidly and the separation ability becomes extremely good. Also, no post-treatment is required.

Claims (1)

[Claims] 1. A flocculating active ingredient, in weight percentage, ferrous sulfate 10-60 calcium hydroxide 10-30 potassium sulfate 1-10 magnesium sulfate 1-10 silicate 1-10 zwitterionic activator 0.5- A cutting oil aggregating treatment agent having a composition of 5.