CN110129813B

CN110129813B - Cleaning agent for cleaning rare earth and preparation method thereof

Info

Publication number: CN110129813B
Application number: CN201910380442.6A
Authority: CN
Inventors: 郑小将; 李华杰
Original assignee: Dongguan Jiechuan Electronic Materials Technology Co ltd
Current assignee: Dongguan Jiechuan Electronic Materials Technology Co ltd
Priority date: 2019-05-08
Filing date: 2019-05-08
Publication date: 2023-09-12
Anticipated expiration: 2039-05-08
Also published as: CN110129813A

Abstract

The invention discloses a cleaning agent for cleaning rare earth and a preparation method thereof, wherein 15-50% of animal and plant extracts and 5-10% of ethanol are uniformly mixed in percentage by mass; adding 30-75% of hydrocarbon solvent and 2-10% of surfactant, and uniformly mixing to obtain the cleaning agent for cleaning rare earth. The cleaning agent for cleaning rare earth is neutral and environment-friendly, greatly reduces the health influence on a contact human body, has no corrosiveness on cleaning objects and cleaning tools, is easy to rinse, has fewer residues, and ensures that the produced rare earth components are purer.

Description

Cleaning agent for cleaning rare earth and preparation method thereof

Technical Field

The invention relates to the field of cleaning agents, in particular to a cleaning agent suitable for cleaning rare earth and a preparation method thereof.

Background

The existing cleaning agent for cleaning rare earth is a strong alkaline chemical composition, and comprises 20% -35% of sodium hydroxide/potassium hydroxide, 5% -10% of HEDP,1% -5% of sodium tripolyphosphate and the balance of water. Particularly in the high-price rare earth production and processing industry, such as tools for cleaning rare earth packaging or rare earth production, residual components are easy to exist, and the rare earth body is polluted.

Accordingly, there is a need to provide an environmentally friendly, easy-to-rinse cleaning agent that overcomes the above-mentioned drawbacks.

Disclosure of Invention

The invention aims to provide a cleaning agent for cleaning rare earth, which is environment-friendly and easy to rinse.

The invention further aims at providing a preparation method of the cleaning agent for cleaning rare earth, which is environment-friendly and easy to rinse.

In order to achieve the aim, the invention provides a cleaning agent for cleaning rare earth, which comprises, by mass, 15% -50% of animal and plant extracts, 30% -75% of hydrocarbon solvents, 5% -10% of ethanol and 2% -10% of surfactants.

Compared with the prior art, the cleaning agent for cleaning rare earth is neutral and environment-friendly, greatly reduces the health influence on a contact human body, has no corrosiveness on cleaning objects and cleaning tools, is easy to rinse, has less residue, and ensures that the produced rare earth components are purer.

Further, the animal and plant extract comprises a terpene comprising limonene or/and turpentine comprising α -pinene, β -pinene, camphene or/and myrcene.

Further, the hydrocarbon solvent is selected from at least one of D100, D80, and D40.

Further, the surfactant is an amine surfactant, and the amine surfactant comprises triethanolamine or/and monoethanolamine. The amine surfactant has certain alkalinity, and the alkalinity surfactant can greatly reduce the viscosity of the rare earth powder after moisture absorption.

Further, the cleaning agent comprises, by mass, 15% -45% of terpene, 45% -75% of hydrocarbon solvent, 5% -10% of ethanol and 2% -5% of amine surfactant.

The invention also provides a method for preparing the cleaning agent for cleaning rare earth, which comprises the following steps: mixing 15-50% of animal and plant extracts and 5-10% of ethanol uniformly in percentage by mass; adding 30-75% of hydrocarbon solvent and 2-10% of surfactant, and uniformly mixing.

Compared with the prior art, the animal and plant extracts are compatible with ethanol, the ethanol is soluble in water and has hydrophilic OH, the water solubility and stability of the animal and plant extracts can be improved after the ethanol and the hydrophilic OH are mixed, the animal and plant extracts are mixed with hydrocarbon solvent and surfactant, the hydrocarbon solvent is compatible with the animal and plant extracts and is insoluble in water, and the surfactant is soluble in water, so that the mixture is stirred to form a microemulsion, and a stable micelle system with isotropy and low viscosity bottom is formed.

Cleaning by a cleaning agent: the rare earth powder has certain cohesiveness after being wet, and even if the rare earth powder is washed by water, the rare earth powder is more sticky due to hygroscopicity, so that the rare earth powder is difficult to clean. The surfactant used in the invention can reduce the viscosity of the rare earth powder after moisture absorption, and the animal and plant extract has super-strong permeability, and carries the surfactant to carry out wetting separation on the rare earth powder on the workpiece and the workpiece surface; simultaneously, the separated rare earth powder particles can be wrapped by two oily substances, namely animal and plant extracts and hydrocarbon solvents; because the density of the rare earth powder is relatively high, the rare earth powder naturally falls to the bottom of the cleaning agent due to the high density of the rare earth powder, and a micelle system is formed again, so that the consumption of effective components of the cleaning agent is lower, and the service life is longer. In addition, the distillation range of the hydrocarbon solvent is higher than that of the animal and plant extracts, so that the animal and plant extracts are not easy to volatilize, and the hydrocarbon solvent is suitable for spray type cleaning equipment and ultrasonic cleaning equipment.

Rinsing: after the cleaning agent is used, a part of animal and plant extracts and hydrocarbon solvents are oily substances, an oil film can be formed on the surface of a workpiece, and when the workpiece is rinsed by water, the cleaning agent can play a role in lubrication, so that rare earth powder is not adhered to the workpiece any more. The animal and plant extract and hydrocarbon solvent are oily substances, which can form oil-water separation during cleaning, and the oily substances are on the upper layer and can play a role in defoaming. The surfactant plays a cleaning role in rinsing, and because a large amount of water dilutes the residual cleaning agent, the balance of micelles is destroyed, so that oily substances can not adhere to the workpiece.

Further, the preparation method comprises the following steps: adding 5% -10% ethanol into a stirring barrel; slowly adding 15% -50% of terpene while stirring, and stirring for 5-15 minutes after the addition is completed; adding 30% -75% of hydrocarbon solvent; adding 2% -10% of amine surfactant, increasing stirring speed, and uniformly mixing.

Further, the animal and plant extract comprises a terpene comprising limonene or/and turpentine comprising α -pinene, β -pinene, camphene or/and myrcene. Limonene is also called limonene, and the limonene liposome is formed after the limonene is mixed with ethanol, so that the limonene liposome has a better protective effect on the limonene.

Further, the surfactant is an amine surfactant, and the amine surfactant comprises triethanolamine or/and monoethanolamine.

Detailed Description

Embodiments of the present invention will now be described.

The compositions of the cleaning agents for cleaning rare earth of examples 1 to 6 are shown in the following table 1.

TABLE 1 composition of cleaning agent for cleaning rare earth according to various embodiments of the present invention

Examples	Animal and plant extracts	Hydrocarbon solvent	Ethanol	Surface active agent
					Example 1	15% limonene	75% of D100	Ethanol of 5%	5% triethanolamine
Example 2	50% turpentine	30% of D80	Ethanol of 10%	10% of monoethanolamine
					Example 3	45% limonene	45% of D40	Ethanol of 6%	4% triethanolamine
Example 4	20% turpentine	70% of D100	Ethanol of 8%	2% of monoethanolamine
					Example 5	30% limonene	60% of D80	Ethanol of 7%	3% of triethanolamine
Example 6	40% turpentine	47% of D40	Ethanol of 5%	8% of monoethanolamine

The cleaning agents for cleaning rare earth of examples 1 to 6 were prepared as follows:

(1) Adding 5% -10% ethanol into a stirring barrel;

(2) Slowly adding 15% -50% of terpene while stirring, and stirring for 5-15 minutes after the addition is completed;

(3) Adding 30% -75% of hydrocarbon solvent; and

(4) Adding 2% -10% of amine surfactant, increasing stirring speed, and uniformly mixing.

The compositions of the alkaline cleaners of comparative examples 1 to 4 are shown in Table 2 below.

Table 2 composition of alkaline cleaner (in mass percent)

Comparative example	Sodium hydroxide	HEDP	Sodium tripolyphosphate	Water and its preparation method
					Comparative example 1	20％	10％	5％	65％
Comparative example 2	25％	5％	2％	68％
					Comparative example 3	30％	8％	1％	61％
Comparative example 4	35％	6％	4％	55％

There are two cleaning modes:

(1) Ultrasonic cleaning, namely adding a cleaning agent into a cleaning tank of an ultrasonic cleaner, placing a workpiece to be cleaned into the cleaning tank, and ultrasonic cleaning for 3-5 minutes; discharging the cleaning agent, adding water, and then ultrasonically rinsing for 3-5 minutes, wherein the rinsing time is more than one tank;

(2) Spraying and cleaning, namely adding a cleaning agent into a cleaning tank of a spraying device, putting a workpiece to be cleaned into the cleaning tank, and spraying the cleaning agent for 1-5 minutes; then the rinse water is sprayed for 1 to 5 minutes.

The cleaning patterns of the examples and comparative examples are shown in table 3 below:

table 3 cleaning modes of examples and comparative examples

The effect of using the cleaning agents of examples 1 to 6 and comparative examples 1 to 4 is shown in Table 4 below.

Table 4 comparison of the Using Effect of the cleaning Agents of examples 1 to 6 and comparative examples 1 to 4

The cleaning agent for cleaning rare earth is neutral and environment-friendly, greatly reduces the influence on the health of a contact human body, has no corrosiveness on cleaning objects and cleaning tools, is easy to rinse, has fewer residues, and ensures that the produced rare earth components are purer.

The foregoing description of the preferred embodiments of the present invention is not intended to limit the scope of the claims, which follow, as defined in the claims.

Claims

1. The cleaning method of the rare earth powder on the workpiece is characterized in that the workpiece to be cleaned is firstly cleaned for 3-5 min in a cleaning tank of an ultrasonic cleaner by using a cleaning agent, the cleaning agent is discharged, water is added, ultrasonic waves are carried out for 3-5 min for rinsing, and the rinsing is carried out for more than one tank, wherein the cleaning agent is as follows in percentage by mass:

15% -50% of animal and plant extracts;

30% -75% of hydrocarbon solvent;

ethanol 5-10%; and

2 to 10 percent of surfactant,

the surfactant is an amine surfactant, and the amine surfactant comprises triethanolamine or/and monoethanolamine.

2. The method for cleaning rare earth powder on a workpiece according to claim 1, wherein the animal and plant extract comprises terpenes including limonene or/and turpentine including α -pinene, β -pinene, camphene or/and myrcene.

3. The method of claim 1, wherein the hydrocarbon solvent is at least one selected from the group consisting of D100, D80, and D40.

4. The method for cleaning rare earth powder on a workpiece according to claim 1, wherein the cleaning agent comprises, in mass percent:

15% -45% of terpene;

45% -75% of hydrocarbon solvent;

ethanol 5-10%; and

2% -5% of amine surfactant.

5. A method for cleaning rare earth powder on a workpiece according to any one of claims 1 to 3, characterized in that the method for preparing the cleaning agent comprises: mixing 15-50% of animal and plant extracts and 5-10% of ethanol uniformly in percentage by mass; adding 30-75% of hydrocarbon solvent and 2-10% of surfactant, and uniformly mixing.

6. The method for cleaning rare earth powder on a workpiece according to claim 5, wherein the preparation method comprises: adding 5% -10% ethanol into a stirring barrel; slowly adding 15% -50% of terpene while stirring, and stirring for 5-15 minutes after the addition is completed; adding 30% -75% of hydrocarbon solvent; adding 2% -10% of amine surfactant, increasing stirring speed, and uniformly mixing.