Environment-friendly high-performance all-alcohol ether compounded cleaning solvent and preparation method thereof

Abstract

The application belongs to the technical field of metal part industry cleaning, and particularly relates to an environment-friendly high-performance full-alcohol-ether compounded cleaning solvent and a preparation method thereof. The cleaning solvent takes ethylene glycol butyl ether, propylene glycol propyl ether and dipropylene glycol dimethyl ether as solvent components, and the three components are in a mass ratio of 55-70 parts of ethylene glycol butyl ether, 5-15 parts of propylene glycol propyl ether and 25-35 parts of dipropylene glycol dimethyl ether, with a total mass ratio of 100 parts. The full-alcohol-ether compounded system is environment-friendly and free of harmful volatile components, and is friendly to human bodies and the environment. The three components are scientifically proportioned, and can simultaneously remove oily and water-soluble pollutants on the surface of metal parts, especially suitable for cleaning of composite pollutants, with high cleaning efficiency and good cleanliness.

Description

Technical Field

[0001] This invention relates to the field of industrial cleaning technology for metal parts, and in particular to an environmentally friendly, high-performance all-alcohol ether compound cleaning solvent and its preparation method. Background Technology

[0002] With the formal implementation of the national mandatory standard GB38508-2020 "Limits of Volatile Organic Compounds in Cleaning Agents," halogen-containing solvents have been strictly restricted or even prohibited from use in the civilian and industrial cleaning fields due to environmental concerns. The industry urgently needs alternative environmentally friendly cleaning solvents. Currently, the mainstream alternative in the industry is to use single-component common alkane solvents (hydrocarbon solvents), or to prepare solvent-based cleaning agents by compounding alkane solvents with other solvents (no related patent applications have been found for this type of compounding scheme).

[0003] However, the aforementioned existing technical solutions have significant technical defects and are difficult to meet the actual needs of industrial cleaning: First, the KB value (butanol value of pine resin) of alkane solvents is low, resulting in limited dissolving ability and poor cleaning effect. The surface tension of the cleaned metal parts cannot meet the technical requirements of the original halogen-containing solvent cleaning. Second, even if alkane solvents are combined with other solvents, since alkane solvents are the dominant component of the system, they still cannot effectively remove water-based contaminants (such as cutting fluids and emulsions) generated during machining. Third, alkane solvents are non-polar solvents and are immiscible with water. They have no dissolving ability for water-based contaminants and cannot achieve simultaneous cleaning of oily and water-based composite contaminants. This results in industrial cleaning needing to be carried out in steps, making the process cumbersome and costly.

[0004] Therefore, developing a cleaning solvent that is environmentally friendly, has high cleaning performance, can simultaneously remove complex pollutants, and is compatible with existing industrial equipment has become a pressing technical challenge in the field of industrial cleaning of metal parts. Summary of the Invention

[0005] The purpose of this invention is to solve the problems mentioned in the background art and to propose an environmentally friendly, high-performance all-alcohol ether compound cleaning solvent and its preparation method.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: An environmentally friendly, high-performance all-alcohol ether compound cleaning solvent and its preparation method are disclosed. The cleaning solvent uses ethylene glycol butyl ether, propylene glycol propyl ether, and dipropylene glycol dimethyl ether as solvent components, and the three components are mixed in the following mass ratio: 55-70 parts of ethylene glycol butyl ether, 5-15 parts of propylene glycol propyl ether, and 25-35 parts of dipropylene glycol dimethyl ether, for a total mass of 100 parts.

[0007] Preferably, the ethylene glycol butyl ether and propylene glycol propyl ether are both industrial grade with a purity ≥99.5%; and the dipropylene glycol dimethyl ether is industrial grade with a purity ≥99.0%.

[0008] Preferably, the cleaning solvent has a KB value of 65-72, a closed-cup flash point of ≥68℃, a boiling point of 173-175℃, and is miscible with water in any proportion.

[0009] Preferably, the cleaning solvent is suitable for the simultaneous cleaning of oily and water-soluble contaminants on the surface of metal parts, and is particularly suitable for removing composite contaminants formed by cutting fluid, emulsion and lubricating oil.

[0010] A method for preparing an environmentally friendly, high-performance all-alcohol ether compound cleaning solvent includes the following steps: (1) Preheating: Turn on the preheating mode of the thermostatic mixing tank, adjust the temperature to 25℃ and keep it constant; (2) Ingredients: According to the proportions described in claim 1, accurately weigh ethylene glycol butyl ether, propylene glycol propyl ether and dipropylene glycol dimethyl ether using an electronic balance with an accuracy ≥ 0.001g, and add them sequentially to a constant temperature stirring tank; (3) Mixing: Adjust the stirring speed of the stirring tank to 300 r / min, and stir for 30 min under constant temperature of 25℃ to fully mix the three components to form a homogeneous transparent solution; (4) Filtration: The mixed solution is filtered under pressure through a precision filter with a filtration accuracy of 0.22 μm to remove trace solid impurities from the raw materials; (5) Finished product: The filtered clear liquid is introduced into a sealed finished product storage tank and stored at room temperature away from light to obtain the environmentally friendly high-performance full alcohol ether compound cleaning solvent and its preparation method.

[0011] Preferably, the volume of the constant temperature stirring tank is 50-100L, and the stirring speed can be adjusted within the range of 0-500r / min.

[0012] Preferably, the cleaning solvent can be directly added to existing industrial ultrasonic cleaning machines, spray cleaning machines, and vacuum cleaning machines without requiring equipment modification. Recommended industrial cleaning parameters are: cleaning temperature 40-60℃, cleaning time 5-10min, and ultrasonic power 800-1200W.

[0013] Compared with the prior art, the present invention has the following beneficial effects: Utilizing a full alcohol-ether compound system, it is environmentally friendly with no harmful volatile components, making it safe for both humans and the environment. The scientifically proportioned three components can simultaneously remove oily and water-soluble contaminants from the surface of metal parts, making it particularly suitable for cleaning complex contaminants. It boasts high cleaning efficiency and excellent cleanliness. The solvent has stable properties, with KB value, flash point, and boiling point all within reasonable ranges, ensuring high safety and low loss. The preparation process is simple and convenient, enabling industrial-scale mass production. No modification to existing cleaning equipment is required, making it compatible with various industrial cleaning methods. It offers low operating costs, suitability for various metal part cleaning scenarios, strong practicality, and a long service life. Detailed Implementation

[0014] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0015] Example 1, An environmentally friendly, high-performance all-alcohol ether compound cleaning solvent and its preparation method are disclosed. The cleaning solvent uses ethylene glycol butyl ether, propylene glycol propyl ether, and dipropylene glycol dimethyl ether as solvent components, and the three components are mixed in the following mass ratio: 60 parts of ethylene glycol butyl ether, 10 parts of propylene glycol propyl ether, and 30 parts of dipropylene glycol dimethyl ether, for a total mass of 100 parts.

[0016] In this embodiment, ethylene glycol butyl ether and propylene glycol propyl ether are both industrial grade with a purity ≥99.5%; dipropylene glycol dimethyl ether is industrial grade with a purity ≥99.0%; the cleaning solvent has a KB value of 68, a closed-cup flash point ≥68℃, a boiling point of 174℃, and is miscible with water in any proportion; it is suitable for the simultaneous cleaning of oily and water-soluble contaminants on the surface of metal parts, and is especially suitable for removing composite contaminants formed by cutting fluid, emulsion and lubricating oil.

[0017] Its preparation method includes the following steps: (1) Preheating: Turn on the preheating mode of the constant temperature stirring tank with a volume of 50L and a speed adjustable in the range of 0-500r / min, adjust the temperature to 25℃ and keep it constant; (2) Ingredients: Using an electronic balance with an accuracy of ≥0.001g, accurately weigh 60 parts of ethylene glycol butyl ether, 10 parts of propylene glycol propyl ether, and 30 parts of dipropylene glycol dimethyl ether, and add them to a constant temperature stirring tank in sequence; (3) Mixing: Adjust the stirring speed of the stirring tank to 300 r / min, and stir for 30 min under constant temperature of 25℃ to fully mix the three components to form a homogeneous transparent solution; (4) Filtration: The mixed solution is filtered under pressure through a precision filter with a filtration accuracy of 0.22 μm to remove trace solid impurities from the raw materials; (5) Finished product: The filtered clear liquid is introduced into a sealed finished product storage tank and stored at room temperature away from light to obtain an environmentally friendly high-performance all-alcohol ether compound cleaning solvent and its preparation method.

[0018] Instructions for use: Add the cleaning solvent directly to an existing industrial ultrasonic cleaner and clean the metal parts with composite contaminants of cutting fluid, emulsion and lubricating oil according to the recommended parameters: cleaning temperature 50℃, cleaning time 8min, ultrasonic power 1000W. After cleaning, remove the parts and let them air dry. The cleaning effect is excellent, with no residue and no damage.

[0019] Example 2 An environmentally friendly, high-performance all-alcohol ether compound cleaning solvent, wherein the cleaning solvent uses ethylene glycol butyl ether, propylene glycol propyl ether, and dipropylene glycol dimethyl ether as solvent components, and the three components are mixed in the following mass ratio: 55 parts of ethylene glycol butyl ether, 15 parts of propylene glycol propyl ether, and 30 parts of dipropylene glycol dimethyl ether, for a total mass of 100 parts.

[0020] In this embodiment, ethylene glycol butyl ether and propylene glycol propyl ether are both industrial grade with a purity ≥99.5%; dipropylene glycol dimethyl ether is industrial grade with a purity ≥99.0%; the cleaning solvent has a KB value of 65, a closed-cup flash point ≥68℃, a boiling point of 173℃, and is miscible with water in any proportion; it is suitable for the simultaneous cleaning of oily and water-soluble contaminants on the surface of metal parts, and is especially suitable for removing composite contaminants formed by cutting fluid, emulsion and lubricating oil.

[0021] Its preparation method includes the following steps: (1) Preheating: Turn on the preheating mode of the constant temperature stirring tank with a volume of 80L and a speed adjustable in the range of 0-500r / min, adjust the temperature to 25℃ and keep it constant; (2) Ingredients: Using an electronic balance with an accuracy of ≥0.001g, accurately weigh 55 parts of ethylene glycol butyl ether, 15 parts of propylene glycol propyl ether, and 30 parts of dipropylene glycol dimethyl ether, and add them to a constant temperature stirring tank in sequence; (3) Mixing: Adjust the stirring speed of the stirring tank to 300 r / min, and stir for 30 min under constant temperature of 25℃ to fully mix the three components to form a homogeneous transparent solution; (4) Filtration: The mixed solution is filtered under pressure through a precision filter with a filtration accuracy of 0.22 μm to remove trace solid impurities from the raw materials; (5) Finished product: The filtered clear liquid is introduced into a sealed finished product storage tank and stored at room temperature away from light to obtain an environmentally friendly high-performance all-alcohol ether compound cleaning solvent and its preparation method.

[0022] Instructions for use: Add the cleaning solvent directly to an existing industrial spray cleaning machine and clean the automotive parts with composite contaminants such as cutting fluid and emulsion according to the recommended parameters: cleaning temperature 40℃, cleaning time 10min, and ultrasonic power 800W. After cleaning, remove the parts and let them air dry. There are no residues after cleaning and the surface of the parts is undamaged. Suitable for batch cleaning needs.

[0023] Example 3 An environmentally friendly, high-performance all-alcohol ether compound cleaning solvent, wherein the cleaning solvent uses ethylene glycol butyl ether, propylene glycol propyl ether, and dipropylene glycol dimethyl ether as solvent components, and the three components are mixed in the following mass ratio: 70 parts of ethylene glycol butyl ether, 5 parts of propylene glycol propyl ether, and 25 parts of dipropylene glycol dimethyl ether, for a total mass of 100 parts.

[0024] In this embodiment, ethylene glycol butyl ether and propylene glycol propyl ether are both industrial grade with a purity ≥99.5%; dipropylene glycol dimethyl ether is industrial grade with a purity ≥99.0%; the cleaning solvent has a KB value of 72, a closed-cup flash point ≥68℃, a boiling point of 175℃, and is miscible with water in any proportion; it is suitable for the simultaneous cleaning of oily and water-soluble contaminants on the surface of metal parts, and is especially suitable for removing composite contaminants formed by cutting fluid, emulsion and lubricating oil.

[0025] Its preparation method includes the following steps: (1) Preheating: Turn on the preheating mode of the constant temperature stirring tank with a volume of 100L and a speed adjustable in the range of 0-500r / min, adjust the temperature to 25℃ and keep it constant; (2) Ingredients: Using an electronic balance with an accuracy of ≥0.001g, accurately weigh 70 parts of ethylene glycol butyl ether, 5 parts of propylene glycol propyl ether, and 25 parts of dipropylene glycol dimethyl ether, and add them to a constant temperature stirring tank in sequence; (3) Mixing: Adjust the stirring speed of the stirring tank to 300 r / min, and stir for 30 min under constant temperature of 25℃ to fully mix the three components to form a homogeneous transparent solution; (4) Filtration: The mixed solution is filtered under pressure through a precision filter with a filtration accuracy of 0.22 μm to remove trace solid impurities from the raw materials; (5) Finished product: The filtered clear liquid is introduced into a sealed finished product storage tank and stored at room temperature away from light to obtain an environmentally friendly high-performance all-alcohol ether compound cleaning solvent and its preparation method.

[0026] Instructions for use: Add the cleaning solvent directly to an existing industrial vacuum cleaner. Follow the recommended parameters: cleaning temperature 60℃, cleaning time 5 minutes, ultrasonic power 1200W. This will clean electronic components contaminated with a combination of lubricating oil and cutting fluid. The cleaning is highly efficient, quickly removing contaminants and leaving components with clean surfaces that do not affect subsequent assembly accuracy. The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An environmentally friendly, high-performance all-alcohol ether compound cleaning solvent, characterized in that, The cleaning solvent consists of ethylene glycol butyl ether, propylene glycol propyl ether, and dipropylene glycol dimethyl ether, in the following mass ratio: 55-70 parts ethylene glycol butyl ether, 5-15 parts propylene glycol propyl ether, and 25-35 parts dipropylene glycol dimethyl ether, for a total mass of 100 parts.

2. The environmentally friendly, high-performance all-alcohol ether compound cleaning solvent and its preparation method according to claim 1, characterized in that: The ethylene glycol butyl ether and propylene glycol propyl ether are both industrial grade with a purity ≥99.5%; the dipropylene glycol dimethyl ether is industrial grade with a purity ≥99.0%.

3. The environmentally friendly, high-performance all-alcohol ether compound cleaning solvent according to claim 1, characterized in that: The cleaning solvent has a KB value of 65-72, a closed-cup flash point of ≥68℃, a boiling point of 173-175℃, and is miscible with water in any proportion.

4. The environmentally friendly, high-performance all-alcohol ether compound cleaning solvent according to claim 1, characterized in that: The cleaning solvent is suitable for the simultaneous cleaning of oily and water-soluble contaminants on the surface of metal parts, and is especially suitable for removing complex contaminants formed by cutting fluid, emulsion and lubricating oil.

5. A method for preparing an environmentally friendly, high-performance all-alcohol ether compound cleaning solvent as described in any one of claims 1-4, characterized in that, Includes the following steps: (1) Preheating: Turn on the preheating mode of the thermostatic mixing tank, adjust the temperature to 25℃ and keep it constant; (2) Ingredients: According to the proportions described in claim 1, accurately weigh ethylene glycol butyl ether, propylene glycol propyl ether and dipropylene glycol dimethyl ether using an electronic balance with an accuracy ≥ 0.001g, and add them sequentially to a constant temperature stirring tank; (3) Mixing: Adjust the stirring speed of the stirring tank to 300 r / min, and stir for 30 min under constant temperature of 25℃ to fully mix the three components to form a homogeneous transparent solution; (4) Filtration: The mixed solution is filtered under pressure through a precision filter with a filtration accuracy of 0.22 μm to remove trace solid impurities from the raw materials; (5) Finished product: The filtered clear liquid is introduced into a sealed finished product storage tank and stored at room temperature away from light to obtain the environmentally friendly high-performance full alcohol ether compound cleaning solvent and its preparation method.

6. The method for preparing the environmentally friendly, high-performance all-alcohol ether compound cleaning solvent according to claim 5, characterized in that, The volume of the constant temperature stirring tank is 50-100L, and the stirring speed can be adjusted within the range of 0-500r / min.

7. The environmentally friendly, high-performance all-alcohol ether compound cleaning solvent according to claim 1, characterized in that, The cleaning solvent can be directly added to existing industrial ultrasonic cleaners, spray cleaners, and vacuum cleaners without requiring equipment modification. Recommended industrial cleaning parameters are: cleaning temperature 40-60℃, cleaning time 5-10min, and ultrasonic power 800-1200W.