CN111321029A

CN111321029A - Degradable metal processing cutting oil and preparation method thereof

Info

Publication number: CN111321029A
Application number: CN202010307304.8A
Authority: CN
Inventors: 张建阳
Original assignee: Xiamen Daiwei Lubricating Oil Co ltd
Current assignee: Xiamen Daiwei Lubricating Oil Co ltd
Priority date: 2020-04-17
Filing date: 2020-04-17
Publication date: 2020-06-23

Abstract

The invention relates to degradable metal processing cutting oil and a preparation method thereof, belonging to the field of metal processing and comprising the following components in parts by weight: 5-50 parts of modified base oil; 2-10 parts of a lubricant; 1-4 parts of an antirust agent; 0-4 parts of extreme pressure agent; 0-1 part of a bactericide; 1-15 parts of an emulsifier; 0-2 parts of corrosion inhibitor; 0-2 parts of a preservative; 20-90 parts of water; 0-0.02 part of defoaming agent A; 0-0.03 part of defoaming agent B; the modified base oil comprises the following components in parts by weight: 40-50 parts of palm oil; 30-40 parts of dimerized ricinoleic acid; 30-40 parts of trimethylolpropane; 3-4 parts of triethanolamine; 2-3 parts of octyl gallate; 2-3 parts of polymethyl methacrylate; 0-0.2 part of hydrogen peroxide. The invention has the advantages of complete biodegradation, prevention of the long-term retention of the water in the water, prevention of gas exchange between isolated air and the water, great reduction of COD value of the water, and prevention of water quality deterioration and death of aquatic organisms due to oxygen deficiency.

Description

Degradable metal processing cutting oil and preparation method thereof

Technical Field

The invention belongs to the field of metal processing, and particularly relates to degradable metal processing cutting oil and a preparation method thereof.

Background

Metal cutting is the most common and widely used one of metal working. The cutting fluid is an important matched material for metal cutting processing. The purpose of using the metal cutting fluid is to reduce cutting force and friction between a cutter and a workpiece, and to carry away heat generated in a cutting area so as to reduce cutting temperature, reduce cutter abrasion and improve cutter durability, thereby improving production efficiency, improving workpiece surface roughness, ensuring workpiece processing precision and achieving the best economic effect. Therefore, the use of cutting fluids is an important measure to improve the quality of machining and to reduce the cost of machining.

The Chinese patent with publication number CN103666730B discloses a cutting fluid with high cooling speed, which is prepared from the following raw materials in parts by weight (kilogram): 20-23 parts of mineral oil, 3-4 parts of alkylphenol polyoxyethylene phosphate, 4-5 parts of octadecyl polyoxyethylene ether, 6-7 parts of polyisobutylene, 2-3 parts of adipic acid, 1-2 parts of flake graphite, 2-3 parts of tetradecyl trimethyl ammonium chloride, 1-2 parts of stannous sulfate, 6-8 parts of an auxiliary agent and 200 parts of water; the auxiliary agent is prepared from the following raw materials in parts by weight: 1-2 parts of amine oxide, 2-3 parts of morpholine, 0.1-0.2 part of nano aluminum nitride, 1-2 parts of sodium silicate, 2-3 parts of borax, 1-2 parts of 2-amino-2-methyl-1-propanol, 2-3 parts of polyoxyethylene sorbitan monooleate, 2-3 parts of peach gum, 1-2 parts of ammonium persulfate and 20-24 parts of water; the preparation method comprises the steps of dissolving ammonium persulfate in water, adding other residual materials, stirring for 10-15 minutes, heating to 70-80 ℃, and stirring for reaction for 1-2 hours to obtain the ammonium persulfate.

However, if the cutting oil is improperly recovered after use, the used waste cutting oil liquid is discharged into a water body, which causes serious influence, when the thickness of the oil film on the water surface is more than 1 μm, gas exchange between air and the water body is isolated, so that the dissolved oxygen in the water body is reduced, stink is generated, the water quality is deteriorated, aquatic organisms die due to oxygen deficiency, and the fish, shellfish and the like are deodorized and cannot be used. In addition, the oily wastewater can pollute the atmosphere and influence the growth of crops. The oily wastewater causes serious pollution and damage to water rings, biospheres and atmospheric rings, and harms human health and living environment.

Disclosure of Invention

Aiming at the defects in the prior art, one of the purposes of the invention is to provide the degradable metal processing cutting oil, the lubricating oil can be completely biodegraded, the lubricating oil is prevented from staying in a water body for a long time, the gas exchange between isolated air and the water body is prevented, the COD value of the water body is greatly reduced, and the water quality deterioration and the death of organisms in water due to oxygen deficiency are avoided. The second purpose of the invention is to improve the viscosity index of the cutting oil, prolong the service life of the cutting oil and improve the oil change period of the cutting oil.

The invention also aims to provide a preparation method of the degradable metal processing cutting oil, which is used for preparing the degradable metal processing cutting oil.

The first invention of the present invention is realized by the following technical scheme:

the degradable metal processing cutting oil comprises the following components in parts by weight: 5-50 parts of modified base oil; 2-10 parts of a lubricant; 1-4 parts of an antirust agent; 0-4 parts of extreme pressure agent; 0-1 part of a bactericide; 1-15 parts of an emulsifier; 0-2 parts of corrosion inhibitor; 0-2 parts of a preservative; 20-90 parts of water; 0-0.02 part of defoaming agent A; 0-0.03 part of defoaming agent B; the modified base oil comprises the following components in parts by weight: 40-50 parts of palm oil; 30-40 parts of dimerized ricinoleic acid; 30-40 parts of trimethylolpropane; 3-4 parts of triethanolamine; 2-3 parts of octyl gallate; 2-3 parts of polymethyl methacrylate; 0-0.2 part of hydrogen peroxide.

Through adopting above-mentioned technical scheme, modified base oil adopts palm oil to modify, the trimethylolpropane fatty acid ester that generates is difficult for being oxidized, stability is better, and biodegradable, with the cutting oil that palm oil was prepared in order to replace mineral oil, after cutting oil flowed into the water, can carry out biodegradation, thereby avoid it to float on the surface of water for a long time and lead to the unable exchange of gas between air and the water, very big reduction the COD value of water, and this degradable metalworking cutting oil's viscosity index is higher, make cutting oil's life longer, the oil change cycle of cutting oil has been improved.

The present invention in a preferred example may be further configured to: the lubricant is one or more of polyester, glyceryl monooleate, trimethylolpropane oleate and pentaerythritol ester.

By adopting the technical scheme, the added lubricant is one or more of polyester, glycerol monooleate, trimethylolpropane oleate and pentaerythritol ester, the lubricant can improve the self lubricity of the cutting oil, and meanwhile, the polyester, the glycerol monooleate, the trimethylolpropane oleate and the pentaerythritol ester are all biodegradable materials, so that the pollution to the environment caused by long-time stay in the environment is avoided.

Further preferably, the lubricant is a synthetic ester, and the synthetic ester comprises the following components in parts by weight: 1-5 parts of erucamide; 1-5 parts of tall oil fatty acid.

By adopting the technical scheme, the erucamide and the tall oil fatty acid are dehydrated through esterification reaction to generate the synthetic ester, the synthetic ester has excellent lubricating property, low pour point and good biodegradability, and can be prevented from staying in the environment for a long time, so that the pollution to the environment is avoided.

Further preferably, the weight ratio of erucamide to tall oil fatty acid is 1: 1.

By adopting the technical scheme, the weight ratio of the erucamide to the tall oil fatty acid is 1:1, the synthetic ester can be completely generated, excessive erucamide and tall oil fatty acid are prevented from staying in the cutting oil, and if the erucamide and the tall oil fatty acid are excessive, the waste of resources is caused.

Further preferably, the lubricant is a synthetic ester, and the preparation of the synthetic ester comprises the following steps:

s1, adding erucamide in corresponding weight portion into a reaction kettle, and heating to 110-120 ℃;

s2, adding the tall oil fatty acid in the corresponding weight part, stirring at the rotating speed of 120-140r/min for 10-20min to obtain the lubricating agent, and taking out for later use.

By adopting the technical scheme, the erucamide is added into the reaction kettle, heated to 110-120 ℃, and then tall oil fatty acid is added, so that the erucamide and the tall oil fatty acid are fully reacted under the stirring action, and the synthetic ester is obtained.

More preferably, the bactericide is one or more of a BK bactericide, an MBM bactericide and an IPBC bactericide.

By adopting the technical scheme, the bactericide can be added to avoid the generation of microorganisms in the cutting fluid; meanwhile, the bactericide adopts BK bactericide, MBM bactericide and IPBC bactericide which belong to slow-release bactericide, the slow-release function of the bactericide endows the metal processing cutting oil with long-acting anticorrosion function, and the cutting fluid can be prevented from being corrupted and smelly during working, so that the safe operation of the system is ensured.

In order to achieve the second object, the invention provides the following technical scheme: a preparation method of degradable metal processing cutting oil is characterized by comprising the following steps:

the method comprises the following steps: preparing modified base oil;

s1, adding palm oil and dimeric ricinoleic acid in corresponding parts by weight into a reaction kettle, heating to 160-;

s2, sequentially adding trimethylolpropane, triethanolamine and hydrogen peroxide in corresponding parts by weight into the reaction kettle, heating to 160 ℃ for 110-fold-increase at the rotating speed of 330r/min under the constant temperature condition for 130 min;

s3, finally, sequentially adding the gallo-octyl ester and the polymethyl methacrylate in corresponding parts by weight into a reaction kettle, and stirring at the rotating speed of 230r/min for 20-30min under the constant temperature condition to obtain modified base oil for later use;

step two: preparing cutting oil;

s1, sequentially adding the defoaming agent A, the extreme pressure agent, the corrosion inhibitor, the emulsifier and the preservative in corresponding weight parts into the modified base oil in corresponding weight parts, heating to 75-85 ℃, and stirring at the rotating speed of 140r/min for 30-40 min;

s2, sequentially adding the corresponding parts by weight of bactericide and antirust agent, keeping the constant temperature of 75-95 ℃, and stirring and mixing uniformly at the rotating speed of 110-;

s3, adding the lubricant in the corresponding weight part into the step 2, heating to 85-95 ℃, keeping the temperature of 85-95 ℃ constant, and stirring and mixing uniformly at the rotating speed of 100-120 r/min;

s4, finally, adding water and the defoaming agent B in corresponding parts by weight, and stirring at the constant temperature of 110-65 ℃ and the rotating speed of 130r/min for 20-30min to obtain the finished cutting oil.

By adopting the technical scheme, the cutting oil is prepared by modifying the palm oil and adding the biodegradable lubricant in the preparation process, so that the produced cutting oil has better lubricity, the cutting oil left in the environment can be completely biodegraded, the cutting oil is prevented from staying in a water body for a long time, and the pollution of the cutting oil to the water body is avoided.

More preferably, both the defoaming agent a and the defoaming agent B are organosiloxane defoaming agents.

By adopting the technical scheme, the addition of the organic siloxane defoaming agent can avoid the cutting oil from generating a large amount of foams in the using process, so that the foams are prevented from influencing the lubricating effect of the cutting fluid.

More preferably, the extreme pressure agent is one or more of tribasic acid, boron amine, fatty acid amide and the like.

By adopting the technical scheme, the extreme pressure agent has chemical reaction with the metal surface at high temperature to generate a chemical adsorption film, the melting point of the chemical adsorption film is much higher than that of a physical adsorption film, the metal friction interface can be prevented from directly contacting under an extreme pressure lubrication state, the friction is reduced, and the lubrication effect is kept.

More preferably, the corrosion inhibitor is one or a mixture of more than one of phosphate, organosilicon, benzotriazole and derivatives thereof.

By adopting the technical scheme, the corrosion inhibitor is added to effectively prevent corrosion, so that the surface of the processed metal is prevented from being corroded.

More preferably, the preservative is sodium cinnamate.

Further preferably, the emulsifier is a mixture of one or more of oleic acid, tall oil, SPAN80 and Tween 80.

More preferably, the rust inhibitor is a mixture of heptadecenyl imidazoline alkenyl succinate and sodium petroleum sulfonate.

Through adopting above-mentioned technical scheme, add antiseptic and emulsifier in to the base oil and form the emulsified oil, the addition of emulsion makes the cutting oil can have rust-resistant function concurrently, simultaneously can extreme pressure performance, is applicable to processes such as metalworking, cutting and uses as the coolant liquid.

In summary, the invention includes at least one of the following beneficial technical effects:

1. the modified base oil is modified by palm oil, the generated trimethylolpropane fatty acid ester is not easy to oxidize, has better stability and is biodegradable, the cutting oil prepared by mineral oil is replaced by the palm oil, and the cutting oil can be biodegraded after flowing into a water body, so that the phenomenon that the cutting oil floats on the water surface for a long time to cause that gas between air and the water body cannot be exchanged is avoided, and the COD value of the water body is greatly reduced;

2. the degradable metal processing cutting oil has a high viscosity index, so that the service life of the cutting oil is long, and the oil change period of the cutting oil is prolonged;

3. erucamide and tall oil fatty acid are dehydrated through esterification reaction to generate synthetic ester, the synthetic ester has excellent lubricating property, can improve the lubricating property of the cutting oil, has good biodegradability, and can avoid staying in the environment for a long time, thereby avoiding polluting the environment.

Detailed Description

The present invention will be described in further detail with reference to examples.

The palm oil is a commercial product in the invention.

Example 1

A degradable metal processing cutting oil is prepared by the following preparation method:

the method comprises the following steps: preparing modified base oil;

s1, adding 40 parts of palm oil and 30 parts of dimerized ricinoleic acid into a reaction kettle, heating to 160 ℃, and stirring at a rotating speed of 110r/min for 40 min;

s2, then sequentially adding 30 parts of trimethylolpropane, 3 parts of triethanolamine and 0.0.1 part of hydrogen peroxide into the reaction kettle, heating to 150 ℃, and stirring at a rotating speed of 310r/min for 130min under a constant temperature condition;

s3, finally, sequentially adding 2 parts of octyl gallate and 2 parts of polymethyl methacrylate into the reaction kettle, and stirring for 30min at a rotating speed of 200r/min under a constant temperature condition to obtain modified base oil for later use;

step two: preparing cutting oil;

s1, adding 0.01 part of organic siloxane defoaming agent, 0.01 part of tribasic acid, 0.1 part of phosphate ester, 1 part of oleic acid and 1 part of sodium cinnamate into 5 parts of modified base oil in sequence, heating to 75 ℃, and stirring at the rotating speed of 120r/min for 40min, wherein the tribasic acid is phosphoric acid in the embodiment;

s2, sequentially adding 0.01 part of BK bactericide and 0.1 part of a mixture of heptadecenyl imidazolinyl succinate and petroleum sodium sulfonate, keeping the temperature at 75 ℃, and uniformly stirring and mixing at the rotating speed of 130r/min, wherein the weight part ratio of the heptadecenyl imidazolinyl succinate to the petroleum sodium sulfonate is 1: 1;

s3, adding 2 parts of polyester into the step 2, heating to 85 ℃, keeping the temperature of 85 ℃ constant, stirring at a rotating speed of 120r/min, and uniformly mixing, wherein the polyester is polyethylene glycol terephthalate in the embodiment;

and S4, finally, adding 20 parts of water and 0.01 part of organic siloxane defoaming agent, and stirring at the constant temperature of 130r/min for 30min at the temperature of 55 ℃ to obtain the finished cutting oil.

Example 2

the method comprises the following steps: preparing modified base oil;

s1, adding 45 parts of palm oil and 35 parts of dimerized ricinoleic acid into a reaction kettle, heating to 160 ℃, and stirring at a rotating speed of 110r/min for 40 min;

s2, then sequentially adding 35 parts of trimethylolpropane, 3.5 parts of triethanolamine and 0.1 part of hydrogen peroxide into the reaction kettle, heating to 150 ℃, and stirring at a rotating speed of 310r/min for 130min under a constant temperature condition;

s3, finally, sequentially adding 2.5 parts of octyl gallate and 2.5 parts of polymethyl methacrylate into the reaction kettle, and stirring for 30min at a rotation speed of 200r/min under a constant temperature condition to obtain modified base oil for later use;

step two: preparing cutting oil;

s1, adding 0.01 part of organic siloxane defoaming agent, 2 parts of tribasic acid, 1 part of phosphate ester, 7.5 parts of oleic acid and 2.5 parts of sodium cinnamate into 30 parts of modified base oil in sequence, heating to 75 ℃, and stirring at the rotating speed of 120r/min for 40min, wherein the tribasic acid is phosphoric acid in the embodiment;

s2, sequentially adding 0.5 part of BK bactericide and 1 part of a mixture of heptadecenyl imidazoline alkenyl succinate and petroleum sodium sulfonate, keeping the constant temperature of 75 ℃, and uniformly stirring and mixing at the rotating speed of 130r/min, wherein the weight part ratio of the heptadecenyl imidazoline alkenyl succinate to the petroleum sodium sulfonate is 1: 1;

s3, adding 6 parts of polyester into the step III 2, heating to 85 ℃, keeping the temperature of 85 ℃ constant, stirring at a rotating speed of 120r/min, and uniformly mixing, wherein the polyester is polyethylene glycol terephthalate in the embodiment;

and S4, finally, adding 55 parts of water and 0.02 part of organic siloxane defoaming agent, and stirring at the constant temperature of 130r/min for 30min at the temperature of 55 ℃ to obtain the finished cutting oil.

Example 3

the method comprises the following steps: preparing modified base oil;

s1, adding 50 parts of palm oil and 40 parts of dimerized ricinoleic acid into a reaction kettle, heating to 160 ℃, and stirring at a rotating speed of 110r/min for 40 min;

s2, then sequentially adding 40 parts of trimethylolpropane, 4 parts of triethanolamine and 0.2 part of hydrogen peroxide into the reaction kettle, heating to 150 ℃, and stirring at a rotating speed of 310r/min for 130min under a constant temperature condition;

s3, finally, sequentially adding 3 parts of octyl gallate and 3 parts of polymethyl methacrylate into the reaction kettle, and stirring for 30min at a rotating speed of 200r/min under a constant temperature condition to obtain modified base oil for later use;

step two: preparing cutting oil;

s2, sequentially adding 1 part of BK bactericide and 2 parts of a mixture of heptadecenyl imidazoline alkenyl succinate and petroleum sodium sulfonate, keeping the constant temperature of 75 ℃, and uniformly stirring and mixing at the rotating speed of 130r/min, wherein the weight part ratio of the heptadecenyl imidazoline alkenyl succinate to the petroleum sodium sulfonate is 1: 1;

s3, adding 10 parts of polyester into the step III 2, heating to 85 ℃, keeping the temperature of 85 ℃ constant, and stirring and mixing uniformly at the rotating speed of 120r/min, wherein the polyester is polyethylene glycol terephthalate in the embodiment;

and S4, finally, adding 90 parts of water and 0.03 part of organic siloxane defoaming agent, and stirring at the constant temperature of 130r/min for 30min at the temperature of 55 ℃ to obtain the finished cutting oil.

Example 4

the method comprises the following steps: preparing modified base oil;

s1, adding 45 parts of palm oil and 35 parts of dimerized ricinoleic acid into a reaction kettle, heating to 165 ℃, and stirring at the rotating speed of 120r/min for 35 min;

s2, then sequentially adding 35 parts of trimethylolpropane, 3.5 parts of triethanolamine and 0.1 part of hydrogen peroxide into the reaction kettle, heating to 155 ℃, and stirring at the constant temperature for 120min at the rotating speed of 320 r/min;

s3, finally, sequentially adding 2.5 parts of octyl gallate and 2.5 parts of polymethyl methacrylate into the reaction kettle, and stirring at the rotating speed of 215r/min for 25min under the constant temperature condition to obtain modified base oil for later use;

step two: preparing cutting oil;

s1, adding 0.01 part of organic siloxane defoaming agent, 2 parts of tribasic acid, 1 part of phosphate ester, 7.5 parts of oleic acid and 2.5 parts of sodium cinnamate into 30 parts of modified base oil in sequence, heating to 80 ℃, and stirring at the rotating speed of 130r/min for 30-40min, wherein the tribasic acid is phosphoric acid in the embodiment;

s2, sequentially adding 0.5 part of BK bactericide and 1 part of a mixture of heptadecenyl imidazolinyl alkenyl succinate and petroleum sodium sulfonate, keeping the temperature at 85 ℃, and uniformly stirring and mixing at the rotating speed of 120r/min, wherein the weight part ratio of the heptadecenyl imidazolinyl alkenyl succinate to the petroleum sodium sulfonate is 1: 1;

s3, adding 6 parts of polyester into the step 2, heating to 90 ℃, keeping the temperature of 90 ℃ constant, stirring at a rotating speed of 110r/min, and uniformly mixing, wherein the polyester is polyethylene glycol terephthalate in the embodiment;

and S4, finally, adding 55 parts of water and 0.02 part of organic siloxane defoaming agent, and stirring at the constant temperature of 120r/min for 20-30min at the temperature of 60 ℃ to obtain the finished cutting oil.

Example 5

the method comprises the following steps: preparing modified base oil;

s1, adding 45 parts of palm oil and 35 parts of dimerized ricinoleic acid into a reaction kettle, heating to 170 ℃, and stirring for 30min at the rotating speed of 130 r/min;

s2, then sequentially adding 35 parts of trimethylolpropane, 3.5 parts of triethanolamine and 0.1 part of hydrogen peroxide into the reaction kettle, heating to 160 ℃, and stirring at a rotating speed of 330r/min for 110min under a constant temperature condition;

s3, finally, sequentially adding 2.5 parts of octyl gallate and 2.5 parts of polymethyl methacrylate into the reaction kettle, and stirring at the rotating speed of 230r/min for 20min under the constant temperature condition to obtain modified base oil for later use;

step two: preparing cutting oil;

s1, adding 0.01 part of organic siloxane defoaming agent, 2 parts of tribasic acid, 1 part of phosphate ester, 7.5 parts of oleic acid and 2.5 parts of sodium cinnamate into 30 parts of modified base oil in sequence, heating to 85 ℃, and stirring at the rotating speed of 140r/min for 30min, wherein the tribasic acid is phosphoric acid in the embodiment;

s2, sequentially adding 0.5 part of BK bactericide and 1 part of a mixture of heptadecenyl imidazoline alkenyl succinate and petroleum sodium sulfonate, keeping the temperature at 95 ℃, and uniformly stirring and mixing at the rotating speed of 130r/min, wherein the weight part ratio of the heptadecenyl imidazoline alkenyl succinate to the petroleum sodium sulfonate is 1: 1;

s3, adding 6 parts of polyester into the step III 2, heating to 95 ℃, keeping the temperature of 95 ℃ constant, stirring at a rotating speed of 120r/min, and uniformly mixing, wherein the polyester is polyethylene glycol terephthalate in the embodiment;

and S4, finally, adding 55 parts of water and 0.02 part of organic siloxane defoaming agent, and stirring at the constant temperature of 130r/min for 20min at the temperature of 65 ℃ to obtain the finished cutting oil.

Example 6

the method comprises the following steps: preparing a synthetic ester;

s1, adding 2 parts of erucamide into a reaction kettle, and heating to 115 ℃;

s2, adding 2 parts of tall oil fatty acid, stirring for 15min at the rotating speed of 130r/min to obtain synthetic ester, wherein the synthetic ester is taken as a lubricant and taken out for later use;

step two: preparing modified base oil;

step three: preparing cutting oil;

s3, adding 6 parts of synthetic ester into the step 2, heating to 90 ℃, keeping the temperature of 90 ℃ constant, and stirring and mixing uniformly at the rotating speed of 110 r/min;

Example 7

the method comprises the following steps: preparing a synthetic ester;

s1, adding 4 parts of erucamide into a reaction kettle, and heating to 115 ℃;

s2, adding 4 parts of tall oil fatty acid, stirring for 15min at the rotating speed of 130r/min to obtain synthetic ester, wherein the synthetic ester is taken as a lubricant and taken out for later use;

step two: preparing modified base oil;

step three: preparing cutting oil;

Example 8

The difference from example 4 is that:

in the second step S3, the polyester is replaced by glycerol monooleate with equal weight parts.

Example 9

The difference from example 4 is that:

in step two S3, the polyester was replaced with an equal weight portion of trimethylolpropane oleate.

Example 10

The difference from example 4 is that:

in step two S3, the polyester is replaced by pentaerythritol ester in equal weight parts.

Comparative example 1

The cutting oil is prepared from a cutting fluid with a high cooling speed disclosed in a Chinese patent with the publication number of CN 103666730B.

Experiment one: biodegradation test method

1. Experimental materials:

soil samples: the samples are taken from 0-5cm soil on the earth surface of different places, and the soil samples are uniformly mixed, subjected to impurity removal and stored in sample bags for later use.

Degradable metalworking cutting oil samples: degradable metalworking cutting oils in examples 1-10, cutting oil in comparative example 1.

2. Cutting oil biodegradability test:

dividing the soil sample into 11 groups, dividing into 11 samples, and performing biodegradation experiment at room temperature (20 deg.C) while maintaining soil water content at about 25%. After the biodegradation experiment is started, sampling soil samples in 15, 20 and 30 days, and determining the total amount of residual cutting oil in the samples by adopting a gravimetric method. The operation method comprises the following steps: accurately weighing 100 g of soil sample in the soil sample from the sample, placing the soil sample in a conical bottle with a plug and a ground opening, and adding 100 ml of CH₂Cl₂Gently shake for 20 minutes and filter the invader into a weighed 250 ml round bottom flask; CH for soil sample₂Cl₂Soaking for 2 times (50 ml CH each time)₂Cl₂) The infusions were filtered into flasks for 20 minutes each time. And (4) removing the solvent by rotary evaporation, weighing, and obtaining the increased weight as the residual cutting oil amount in the soil sample. And calculating the biodegradation rate of the trace cutting oil according to the concentration of the residual cutting oil in the soil sample and the following formula. Epsilon is (S1-S2)/S1X100 percent, wherein S1 is the weight fraction (mg.g) of the trace cutting oil in the soil sample at the 0 th day; and S2 is the mass fraction (mg.g) of the micro-cutting oil in the soil sample on the F day. Specific results are shown in table 1.

TABLE 1 biodegradation rates of cutting oils of examples 1 to 10 and comparative example 1

The detection results in table 1 show that the degradable metal processing cutting oil disclosed by the invention can be spontaneously biodegraded over time after being left in soil, and is prevented from staying in the environment for a long time, so that the cutting oil is prevented from staying in the environment for a long time to influence the environment.

Experiment two: the results of the quality tests of the products of examples 1 to 10 and comparative example 1 of the present invention are shown in Table 2:

TABLE 2 product index of cutting oil organisms for examples 1-10 and comparative example 1

The detection results in table 2 show that the degradable metal processing cutting oil has a high viscosity index and a low pour point, so that the service life of the cutting oil is long, and the oil change period of the cutting oil is prolonged.

The embodiments of the present invention are the preferred embodiments of the present invention, and the scope of the present invention is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention should be covered within the protection scope of the invention.

Claims

1. A degradable metal processing cutting oil is characterized in that: the composition comprises the following components in parts by weight:

5-50 parts of modified base oil;

2-10 parts of a lubricant;

1-4 parts of an antirust agent;

0-4 parts of extreme pressure agent;

0-1 part of a bactericide;

1-15 parts of an emulsifier;

0-2 parts of corrosion inhibitor;

0-2 parts of a preservative;

20-90 parts of water;

0-0.02 part of defoaming agent A;

0-0.03 part of defoaming agent B;

the modified base oil comprises the following components in parts by weight:

40-50 parts of palm oil;

30-40 parts of dimerized ricinoleic acid;

30-40 parts of trimethylolpropane;

3-4 parts of triethanolamine;

2-3 parts of octyl gallate;

2-3 parts of polymethyl methacrylate;

0-0.2 part of hydrogen peroxide.

2. The degradable metalworking cutting oil of claim 1, wherein: the lubricant is one or more of polyester, glyceryl monooleate, trimethylolpropane oleate and pentaerythritol ester.

3. The degradable metalworking cutting oil of claim 1, wherein: the lubricant is synthetic ester which comprises the following components in parts by weight:

1-5 parts of erucamide;

1-5 parts of tall oil fatty acid.

4. The degradable metalworking cutting oil of claim 3, wherein: the weight ratio of erucamide to tall oil fatty acid is 1: 1.

5. The degradable metalworking cutting oil of claim 4, wherein: the lubricant is a synthetic ester, and the preparation of the synthetic ester comprises the following steps:

s2, adding the tall oil fatty acid in the corresponding weight part, stirring at the rotating speed of 120-.

6. The degradable metalworking cutting oil of claim 1, wherein: the bactericide is one or more of BK bactericide, MBM bactericide and IPBC bactericide.

7. A preparation method of degradable metal processing cutting oil comprises the following steps:

the method comprises the following steps: preparing modified base oil;

step two: preparing cutting oil;