CN108315744A - A kind of oil-removing rust-removing agent and the preparation method and application thereof - Google Patents

Abstract

The invention discloses an oil and rust remover, a preparation method and application thereof, and belongs to the technical field of chemical preparations. Oil and rust remover, according to the important parts, includes the following components: 10-30 parts of hydroxyethylidene diphosphonic acid (HEDP), 0-3 parts of tartaric acid, 0-1 part of sodium pyrophosphate, 0-10 parts of zinc lactate , 0-10 parts of sodium citrate, 0-10 parts of oxalic acid. The oil and rust remover of the present invention does not contain strong acid, is not affected by temperature, and can remove oil and rust at normal temperature. And the degreasing and derusting agent of the present invention is in the form of a paste, which is convenient for transportation. The method of use is to remove oil and rust by dissolving an appropriate amount in water. Generally, take 3‑10 parts of oil and rust remover and add 80‑120 parts of water to remove oil and rust on heavy rotten and heavy oil workpieces. Generally, ultrasonic It takes about 3 minutes under normal conditions, and about 5 minutes at room temperature, and the heat treatment will be faster. After the oil and rust remover of the present invention is used, the rust will be deposited on the bottom, and can be reused by filtering, and can be discharged after neutralization by adding alkali, and has no pollution to the environment.

Description

A kind of degreasing derusting agent and its preparation method and application

technical field

The invention relates to an oil and rust remover, a preparation method and application thereof, and belongs to the technical field of chemical preparations.

Background technique

Rust is a chemical reaction. When iron is left for a long time, it will rust. Tin box will rust for a long time, iron is easy to rust, in addition to its vivid chemical properties, but also has a lot to do with the external conditions. Moisture is one of the substances that make iron easy to rust. However, only water does not make iron rust, only when the oxygen in the air is dissolved in water, the oxygen reacts with iron in the environment with water, and iron oxide will be produced, which is rust. Iron rust is a kind of brownish-red material, it is not so hard as iron, it is easy to fall off, after a piece of iron gets rusty completely, its volume can expand by 8 times. If rust is not removed, this spongy rust is especially good at absorbing water, and iron will rust faster. Iron is heavier when rusted, about 3 to 5 times its original weight.

Traditional chemical rust removal usually uses strong acid, which can chemically react with rust and metal oxides to generate soluble salts, so as to achieve the purpose of rust removal. At the same time of rust removal, acid can react with base metal to release hydrogen, hydrogen It can generate pressure on rust and insoluble scale, which is beneficial to their peeling and reduction of high-valent iron, and accelerates the pickling process, but the traditional acid treatment method also has obvious defects: that is, the large amount of hydrogen gas in the process The occurrence of hydrogen embrittlement will cause the steel to have hydrogen embrittlement, which will cause the mechanical properties of the metal to decline and affect the strength of the steel itself; at the same time, it is easy to form acid mist, which will affect the health of the operator and corrode the surrounding equipment and environment; the consumption of acid is also large. Increases disposal costs; these acids can over-corrode steel. In addition, the residues produced in large quantities need to be discharged frequently, which not only severely corrodes industrial pipelines, but also pollutes the soil and the environment. In addition, strong acid is not easy to transport, and there is a certain degree of danger.

In order to solve the above problems, there is an urgent need for a degreasing and derusting agent that does not need strong acid, has high efficiency, is simple to operate, and is convenient to transport.

Contents of the invention

The object of the present invention is to provide a preparation and application of a degreasing and derusting agent, so as to solve the problems raised in the above-mentioned background technology.

To achieve the above object, the present invention provides the following technical solutions:

A degreasing and rust removing agent, comprising the following components according to important parts: 10-30 parts of hydroxyethylidene diphosphonic acid (HEDP), 0.5-3 parts of tartaric acid, 0-1 part of sodium pyrophosphate, 0-1 part of zinc lactate 10 parts, sodium citrate 0-10 parts, oxalic acid 0-10 parts.

In one embodiment of the present invention, according to the important parts, the following components are included: 20-30 parts of HEDP, 1-2 parts of tartaric acid, 0.1-1 parts of sodium pyrophosphate, 5-10 parts of zinc lactate, sodium citrate 5-10 parts, 5-10 parts of oxalic acid.

In one embodiment of the present invention, the degreasing and rust removing agent further includes 1-5 parts of surfactant in terms of important parts.

In one embodiment of the present invention, the surfactant is octylphenol polyoxyethylene ether, cocamidopropyl betaine, sodium lauryl sulfate, coconut oil fatty acid diethanolamide, sucrose ester, coconut One or a combination of two oleic acids.

In one embodiment of the present invention, the degreasing and rust removing agent further includes 20-30 parts of water in terms of important parts.

The second object of the present invention is to provide the preparation method of the degreasing and rust removing agent, the preparation method is specifically:

(1) Add 20-30 parts of water in the reactor and raise the temperature;

(2) Put 20-30 parts of hydroxyethylidene diphosphonic acid in a beaker, slowly add 0.5-3 parts of tartaric acid, mix well; then slowly add 0-1 part of sodium pyrophosphate, stir well; then slowly add zinc lactate 0-10 parts, stir evenly; then slowly add 0-10 parts of sodium citrate, stir evenly; slowly add 0-10 parts of oxalic acid, stir well, and form a uniform solid mixture;

(3) Slowly add the solid mixture in step (2) to the warm water in step (1), and add 1-5 parts of octylphenol polyoxyethylene ether or/and 1-5 parts of cocamidopropyl betaine while stirring , continue to stir evenly, and let it stand to room temperature to obtain a paste degreasing and rust removing agent.

In one embodiment of the present invention, the elevated temperature in the step (1) is 40-60°C.

In one embodiment of the present invention, the stirring in the step (3) is stirring at a rotational speed of 1000-3000 rpm for 20-30 minutes.

The third object of the present invention is to provide the application of the oil and rust remover in industry and agriculture.

In one embodiment of the present invention, the application is to use the oil and rust remover to remove oil stains and rust on the steel surface.

Compared with prior art, the beneficial effect of the present invention is:

1. The degreasing and derusting agent of the present invention does not contain strong acid, is not affected by temperature, and can degrease and derust at normal temperature.

2. The degreasing and derusting agent of the present invention is in paste form after preparation, which is convenient for transportation. The method of use is to take an appropriate amount and dissolve it in water to remove oil and rust. Generally, take 3-10 parts of oil and rust remover and add 80-120 parts of water to remove oil and rust on workpieces with heavy rot and heavy oil. Generally, ultrasonic It takes about 3 minutes under normal conditions, and about 5 minutes at room temperature, and the heat treatment will be faster. However, in the existing method, concentrated acid is generally used to add some substances, and the ultrasonic wave needs 8-10 minutes.

3. After the oil and rust remover of the present invention is used, the rust will be deposited at the bottom, which can be used for secondary use by filtration, and can be discharged after neutralization by adding alkali, which has no pollution to the environment.

Description of drawings

Figure 1 is a process diagram of degreasing and rust removal; where a is the original corroded workpiece, b is the process of degreasing and derusting, c is the effect of degreasing and derusting, and d is the solution after degreasing and derusting.

Detailed ways

The technical solutions of the present invention will be described in further detail below in conjunction with specific embodiments. The following examples are only used to illustrate the present invention, but not to limit the protection scope of the present invention.

The invention discloses an oil and rust remover, which comprises the following components according to important parts: 10-30 parts of HEDP, 0.5-3 parts of tartaric acid, 0-1 part of sodium pyrophosphate, 0-10 parts of zinc lactate, lemon 0-10 parts of sodium acid, 0-10 parts of oxalic acid, 1-5 parts of surfactant, 20-30 parts of water.

The present invention also provides a preparation method of an oil and rust remover, the specific steps comprising:

(1) Add 20-30 parts of water into the reaction kettle and raise the temperature to 40-60°C;

(2) Put 10-30 parts of HEDP in a beaker, slowly add 0.5-3 parts of tartaric acid, mix well; then slowly add 0-1 part of sodium pyrophosphate, stir well; then slowly add 0-10 parts of zinc lactate, Stir evenly; then slowly add 0-10 parts of sodium citrate, stir evenly; slowly add 0-10 parts of oxalic acid, stir well, and form a uniform solid mixture;

(3) Slowly add the solid mixture in step (2) to the warm water in step (1), 1000-3000 rpm, add 1-5 parts of surfactant, stir evenly for 20-30 minutes, stop stirring, and let it stand The paste degreasing and rust removing agent can be obtained at room temperature.

Example 1:

The invention discloses an oil and rust remover, which comprises the following components according to the important parts: 27 parts of HEDP, 1 part of tartaric acid, 1 part of sodium pyrophosphate, 5 parts of zinc lactate, 8 parts of sodium citrate, and 8 parts of oxalic acid , 3 parts of octylphenol polyoxyethylene ether, 2 parts of cocamidopropyl betaine, 25 parts of water.

The present invention also provides a preparation method of an oil and rust remover, the specific steps comprising:

(1) Add 25 parts of water into the reaction kettle and raise the temperature to 60°C;

(2) Put 27 parts of HEDP in a beaker, slowly add 1 part of tartaric acid, mix well; then slowly add 1 part of sodium pyrophosphate, stir well; then slowly add 5 parts of zinc lactate, stir well; then slowly add citric acid 8 parts of sodium, stir evenly; slowly add 8 parts of oxalic acid, stir well to form a uniform solid mixture;

(3) Slowly add the solid mixture of step (2) into the warm water of step (1), at 2000 rpm, add 3 parts of octylphenol polyoxyethylene ether and 2 parts of cocamidopropyl betaine, stir evenly for 30 Minutes, stop stirring, and leave it to room temperature to obtain the paste degreasing and rust removing agent.

Example 2:

The invention discloses an oil and rust remover, which comprises the following components according to the important parts: 28 parts of HEDP, 1.5 parts of tartaric acid, 1 part of sodium pyrophosphate, 8 parts of zinc lactate, 8 parts of sodium citrate and 8 parts of oxalic acid , 2 parts of octylphenol polyoxyethylene ether, 3 parts of sodium lauryl sulfate, and 25 parts of water.

The present invention also provides a preparation method of an oil and rust remover, the specific steps comprising:

(1) Add 25 parts of water into the reaction kettle and raise the temperature by 40°C;

(2) Put 28 parts of HEDP in a beaker, slowly add 1.5 parts of tartaric acid, mix well; then slowly add 1 part of sodium pyrophosphate, stir well; then slowly add 8 parts of zinc lactate, stir well; then slowly add citric acid 8 parts of sodium, stir evenly; slowly add 8 parts of oxalic acid, stir well to form a uniform solid mixture;

(3) Slowly add the solid mixture of step (2) into the warm water of step (1), at 3000 rpm, add 2 parts of octylphenol polyoxyethylene ether and 3 parts of sodium lauryl sulfate, and stir evenly for 30 minutes , stop stirring, and leave it to room temperature to obtain a paste degreasing and rust removing agent.

Example 3:

The invention discloses an oil and rust remover, which comprises the following components according to the important parts: 28 parts of HEDP, 1.5 parts of tartaric acid, 1 part of sodium pyrophosphate, 8 parts of zinc lactate, 8 parts of sodium citrate and 8 parts of oxalic acid , 4 parts of octylphenol polyoxyethylene ether, 25 parts of water.

The present invention also provides a preparation method of an oil and rust remover, the specific steps comprising:

(1) Add 25 parts of water into the reaction kettle and raise the temperature by 40°C;

(2) Put 28 parts of HEDP in a beaker, slowly add 1.5 parts of tartaric acid, mix well; then slowly add 1 part of sodium pyrophosphate, stir well; then slowly add 8 parts of zinc lactate, stir well; then slowly add citric acid 8 parts of sodium, stir evenly; slowly add 8 parts of oxalic acid, stir well to form a uniform solid mixture;

(3) Slowly add the solid mixture in step (2) to the warm water in step (1), at 3000 rpm, add 4 parts of octylphenol polyoxyethylene ether, stir evenly for 30 minutes, stop stirring, and let it stand to room temperature That is, a paste degreasing and rust removing agent can be obtained.

Example 4:

The invention discloses an oil and rust remover, which comprises the following components according to important parts: 28 parts of HEDP, 2 parts of tartaric acid, 1 part of sodium pyrophosphate, 5 parts of cocamidopropyl betaine and 28 parts of water.

The present invention also provides a preparation method of an oil and rust remover, the specific steps comprising:

(1) Add 28 parts of water into the reaction kettle and raise the temperature by 50°C;

(2) Put 28 parts of HEDP in a beaker, slowly add 2 parts of tartaric acid, mix well; then slowly add 1 part of sodium pyrophosphate, stir well, and form a uniform solid mixture;

(3) Slowly add the solid mixture of step (2) into the warm water of step (1), at 3000 rpm, add 5 parts of cocamidopropyl betaine, stir evenly for 28 minutes, stop stirring, and let it stand to room temperature That is, a paste degreasing and rust removing agent can be obtained.

Example 5:

The invention discloses an oil and rust remover, which comprises the following components according to important parts: 30 parts of HEDP, 3 parts of tartaric acid, 1 part of sodium pyrophosphate, 5 parts of sodium lauryl sulfate and 30 parts of water.

The present invention also provides a preparation method of an oil and rust remover, the specific steps comprising:

(1) Add 30 parts of water into the reaction kettle and raise the temperature to 60°C;

(2) Put 30 parts of HEDP in a beaker, slowly add 3 parts of tartaric acid, mix well; then slowly add 1 part of sodium pyrophosphate, stir well, and form a uniform solid mixture;

(3) Slowly add the solid mixture in step (2) to the warm water in step (1), at 3000 rpm, add 5 parts of sodium lauryl sulfate, stir evenly for 30 minutes, stop stirring, and let it stand at room temperature. Paste oil and rust removers are available.

Embodiment 6:

The invention discloses an oil and rust remover, which comprises the following components according to important parts: 23 parts of HEDP, 2 parts of tartaric acid, 5 parts of zinc lactate, 5 parts of coconut oil fatty acid diethanolamide and 20 parts of water.

The present invention also provides a preparation method of an oil and rust remover, the specific steps comprising:

(1) Add 20 parts of water into the reaction kettle and raise the temperature by 50°C;

(2) Put 23 parts of HEDP in a beaker, slowly add 2 parts of tartaric acid, mix well; then slowly add 5 parts of zinc lactate, stir well, and form a uniform solid mixture;

(3) Slowly add the solid mixture of step (2) into the warm water of step (1), at 2000 rpm, add 5 parts of coconut oil fatty acid diethanolamide, stir evenly for 20 minutes, stop stirring, and let it stand until room temperature Paste oil and rust removers are available.

Embodiment 7:

The invention discloses an oil and rust remover, which comprises the following components according to the important parts: 25 parts of HEDP, 1 part of tartaric acid, 6 parts of zinc lactate, 5 parts of sodium citrate, 5 parts of oxalic acid, cocoamidopropyl 5 parts of betaine, 25 parts of water.

The present invention also provides a preparation method of an oil and rust remover, the specific steps comprising:

(1) Add 25 parts of water into the reaction kettle and raise the temperature to 60°C;

(2) Put 25 parts of HEDP in a beaker, slowly add 1 part of tartaric acid, stir well; slowly add 6 parts of zinc lactate, stir well; then slowly add 5 parts of sodium citrate, stir well; slowly add 5 parts of oxalic acid, stir Uniform, forming a homogeneous solid mixture;

(3) Slowly add the solid mixture of step (2) into the warm water of step (1), at 2000 rpm, add 3 parts of octylphenol polyoxyethylene ether and 3 parts of cocamidopropyl betaine, stir evenly for 30 Minutes, stop stirring, and leave it to room temperature to obtain the paste degreasing and rust removing agent.

Comparative example 1:

The invention discloses an oil and rust remover, which comprises the following components according to important parts: 27 parts of HEDP, 5 parts of cocamidopropyl betaine and 25 parts of water.

The present invention also provides a preparation method of an oil and rust remover, the specific steps comprising:

(1) Add 25 parts of water into the reaction kettle and raise the temperature to 60°C;

(2) Take 27 parts of HEDP and slowly add it to the warm water in step (1), at 2000 rpm, add 5 parts of cocamidopropyl betaine, stir evenly for 30 minutes, stop stirring, and let it stand at room temperature to obtain the paste Degreasing and rust removing agent.

Comparative example 2:

The invention discloses an oil and rust remover, which comprises the following components according to the important parts: 3 parts of tartaric acid, 1 part of sodium pyrophosphate, 5 parts of zinc lactate, 5 parts of sodium citrate, 5 parts of oxalic acid, and cocoamide 5 parts of propyl betaine, 25 parts of water.

The present invention also provides a preparation method of an oil and rust remover, the specific steps comprising:

(1) Add 25 parts of water into the reaction kettle and raise the temperature to 60°C;

(2) Put 3 parts of tartaric acid in a beaker, slowly add 1 part of sodium pyrophosphate, stir well; slowly add 5 parts of zinc lactate, stir well; then slowly add 5 parts of sodium citrate, stir well; slowly add 5 parts of oxalic acid , stirred evenly to form a uniform solid mixture;

(3) Slowly add the solid mixture of step (2) into the warm water of step (1), at 2000 rpm, add 5 parts of cocamidopropyl betaine, stir evenly for 30 minutes, stop stirring, and let it stand to room temperature That is, a paste degreasing and rust removing agent can be obtained.

Dissolve 10 parts of the degreasing and rust removing agents of each of the above embodiments and comparative examples in 90 parts of water, prepare the degreasing and rust removing solution, then put the corroded workpieces with a corresponding corrosion degree, and time at the same time, when the metal color of the workpiece appears , to stop the timer.

The treatment time of the degreasing and descaling agents of each of the above examples and comparative examples at normal temperature or under ultrasonic conditions is shown in Table 1.

Table 1 Treatment time of oil and rust remover

Degreasing and derusting at room temperature (min) Ultrasonic degreasing and derusting (min) Example 1 3 1 Example 2 3.5 1.5 Example 3 4 1.5 Example 4 4 2 Example 5 3 2 Example 6 5 3 Example 7 6 3 Comparative example 1 8 5 Comparative example 2 10 6

In addition, add 10 parts of hydrochloric acid to 90 parts of water as a comparison rust removal solvent, and then put the corroded workpiece with the same corrosion degree as above, and time it at the same time. When the metal color of the workpiece appears, stop the timing. Compare with the degreasing and rust removing agent of above-mentioned embodiment 1, the results are shown in Fig. 1. As can be seen from Fig. 1 (b), when adopting hydrochloric acid to carry out derusting, all there is a large amount of air bubbles on workpiece surface and solvent surface, and the air bubble that degreasing derusting agent of the present invention produces is less; From Fig. 1 (c) and (d) It can be seen that when hydrochloric acid is used for derusting, the impurities produced are more, the solution is yellow, and iron ions are dissolved in the solution, while the oil and rust remover of the present invention produces less impurities, and the iron precipitated in the solution is less. Bottom of cup, will not dissolve in solution.

Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person familiar with this technology can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore The scope of protection of the present invention should be defined by the claims.

Claims (10)

1. A degreasing and rust removing agent, characterized in that, according to important parts, it comprises the following components: 10-30 parts of hydroxyethylidene diphosphonic acid, 0.5-3 parts of tartaric acid, 0-1 part of sodium pyrophosphate, lactic acid 0-10 parts of zinc, 0-10 parts of sodium citrate, 0-10 parts of oxalic acid. 2. The degreasing and rust removing agent according to claim 1, characterized in that, according to important parts, it comprises the following components: 20-30 parts of hydroxyethylidene diphosphonic acid, 1-2 parts of tartaric acid, 0.1 parts of sodium pyrophosphate -1 part, 5-10 parts of zinc lactate, 5-10 parts of sodium citrate, 5-10 parts of oxalic acid. 3. The oil and rust remover according to any one of claims 1 and 2, characterized in that, according to the important parts, the oil and rust remover also includes 1-5 parts of surfactant. 4. degreasing rust remover according to claim 3, is characterized in that, described tensio-active agent is octylphenol polyoxyethylene ether, cocamidopropyl betaine, sodium lauryl sulfate, coconut oil One or a combination of fatty acid diethanolamide, sucrose ester, and coconut oleic acid. 5. The oil and rust remover according to any one of claims 1 to 4, characterized in that, according to the important parts, the oil and rust remover also includes 20-30 parts of water. 6. The preparation method of any one of claims 1 to 5, characterized in that the preparation method is specifically: (1) Add 20-30 parts of water in the reactor and raise the temperature; (2) Put 20-30 parts of hydroxyethylidene diphosphonic acid in a beaker, slowly add 0.5-3 parts of tartaric acid, mix well; then slowly add 0-1 part of sodium pyrophosphate, stir well; then slowly add zinc lactate 0-10 parts, stir evenly; then slowly add 0-10 parts of sodium citrate, stir evenly; slowly add 0-10 parts of oxalic acid, stir well, and form a uniform solid mixture; (3) Slowly add the solid mixture in step (2) to the warm water in step (1), and add 1-5 parts of octylphenol polyoxyethylene ether or/and 1-5 parts of cocamidopropyl betaine while stirring , continue to stir evenly, and let it stand to room temperature to obtain a paste degreasing and rust removing agent. 7. The method according to claim 6, characterized in that, in the step (1), the elevated temperature is 40-60°C. 8. The method according to claim 6, characterized in that, stirring in the step (3) is stirring at a rotating speed of 1000-3000 rpm for 20-30 minutes. 9. The application of any one of claims 1 to 5 for degreasing and derusting agent in industry and agriculture. 10. The application according to claim 9, characterized in that, the application is to use the oil and rust remover to remove oil stains and rust on the metal surface.