Water removing agent for diesel oil
Technical Field
The invention belongs to the field of water removal agents, and particularly relates to a water removal agent for diesel oil.
Background
The diesel oil for vehicles is not allowed to contain moisture. However, in the processes of storage, transportation and addition, the diesel oil is not well managed and used, and the maintenance of a fuel oil supply system of the diesel vehicle are not proper, so that the diesel vehicle contains water. In addition, diesel fuel also absorbs moisture and the like during storage and use due to rain leakage or from humid air.
Since water has a higher specific gravity than diesel oil, water sinks to the bottom of the tank. The sulfur in diesel oil is mixed with water, and can generate corrosive acid at high temperature, so that the oil nozzle, the valve and the valve seat, the piston ring and the like are corroded, and the abrasion is caused. In addition, the diesel contains moisture, under the condition that the fuel injection quantity set by a fuel injection pump is not changed, the diesel quantity is relatively reduced, the heat of a combustion chamber can be taken away by the moisture injected along with the diesel, the diesel is incompletely combusted due to the reduction of the temperature, and the diesel engine shows white smoke emission, power reduction, fuel consumption increase and the like. The water sprayed into the combustion chamber by the diesel oil is more and less often and is intermittent, which will cause the rotation speed of the diesel engine to be suddenly high and suddenly low, the diesel engine is unstable in operation, the noise is increased, and the abrasion is accelerated. If the water content in the diesel oil is too much, the problems of isolating the diesel oil, interrupting an oil path, blocking the oil path when water freezes in winter, insufficient oil supply and even no oil supply of an oil injection pump and the like can be caused, so that the diesel engine is difficult to start, and the problems of no start, intermittent work, automatic flameout and the like can be caused.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a water removing agent which can enable water and diesel oil to quickly form stable emulsion, improve the low-temperature fluidity of the diesel oil and ensure the smooth cold start of an engine.
The technical scheme is as follows: the invention relates to a water removing agent for diesel oil, which comprises the following raw materials in percentage by mass: 40-60% of organic solvent, 30-50% of nonionic surfactant, 5-10% of combustion accelerator and 0.5-5% of antirust agent.
According to the invention, by adding the nonionic surfactant, the combustion promoter and the antirust agent, the combination of the nonionic surfactant, the combustion promoter and the antirust agent can quickly form an emulsion between water and diesel oil, the combustion efficiency of the diesel oil is improved, and the problems of unsmooth combustion, even flameout and the like of an engine are avoided. Preferably, the antirust paint comprises 45-55% of an organic solvent, 35-45% of a nonionic surfactant, 5-8% of a combustion promoter and 1-3% of an antirust agent.
Furthermore, the organic solvent used in the present invention may include at least one of ethanol, isopropanol, 2, 4-pentanediol, or mesitylene. Preferably, isopropyl alcohol and/or 2, 4-pentanediol. The nonionic surfactant can be ethylene glycol monobutyl ether and/or tall oil diethanolamide. Preferably tall oil diethanolamide. The combustion improver may be isooctyl nitrate or cyclohexyl nitrate. The rust inhibitor can be sorbitol monooleate or dodecenylsuccinic acid. Sorbitol monooleate may be preferred.
The tall oil diethanolamide nonionic surfactant which is a branched chain long-carbon chain alkyl alcohol amine organic compound is dissolved in an oil phase and easily dispersed in a water phase system, and can quickly form an emulsion from water and diesel oil without excessive mechanical mixing; meanwhile, the sorbitol monooleate antirust agent is adopted, so that the antirust agent has excellent antirust performance, excellent emulsifying capacity and compatibility with diesel oil, and has no influence on the combustion efficiency of the diesel oil. The sorbitol monooleate antirust agent and the tall oil diethanolamide are compounded for use, so that the capacity of forming emulsion by diesel oil and water is further promoted.
Has the advantages that: compared with the prior art, the invention has the following remarkable advantages: the water remover can ensure that water and diesel oil form stable emulsion, so that water in the diesel oil effectively participates in combustion, the combustion efficiency is improved, the water can be prevented from corroding fuel oil pipelines, the problems of influence of the water on the dynamic property of a diesel engine and corrosion of a diesel oil tank are effectively solved, the low-temperature fluidity of the diesel oil is further improved, and the smooth cold start of the engine is ensured.
Drawings
FIG. 1 is a diagram showing the effect of water removal by the water removal agent of the present invention.
Detailed Description
The technical solution of the present invention is further described in detail with reference to the accompanying drawings and embodiments.
The raw materials adopted by the invention can be purchased from the market.
Example 1
Raw materials: 60% of isopropanol, 30% of ethylene glycol monobutyl ether, 7.0% of cyclohexyl nitrate and 3.0% of dodecenylsuccinic acid.
The preparation process comprises the following steps: and (3) sequentially adding each material into the stirring kettle according to the mass percentage, and uniformly stirring to prepare the water removing agent.
Example 2
Raw materials: isopropanol 53%, tall oil diethanolamide 40%, isooctyl nitrate 5.0% and sorbitol monooleate 2.0%.
The preparation process comprises the following steps: and (3) sequentially adding each material into the stirring kettle according to the mass percentage, and uniformly stirring to prepare the water removing agent.
Example 3
Raw materials: 46% of 2, 4-pentanediol, 45% of tall oil diethanolamide, 8.0% of isooctyl nitrate and 1.0% of dodecenylsuccinic acid.
The preparation process comprises the following steps: and (3) sequentially adding each material into the stirring kettle according to the mass percentage, and uniformly stirring to prepare the water removing agent.
The water removal agent prepared in the embodiment is added into diesel oil with water content within 5% by 0.5% of the addition amount, and can be quickly dispersed in the diesel oil to form emulsified diesel oil, as shown in figure 1, so that the problems of no start, discontinuous work, automatic flameout and the like caused by the separation of the diesel oil and the water are avoided; meanwhile, the problems of fuel oil pipeline corrosion, pipeline icing and the like caused by water can be effectively avoided.
Comparative example 1
The basic procedure was the same as in example 2, except that no sorbitol monooleate was added to the starting material as follows: 50% of isopropanol, 40% of tall oil diethanolamide and 10% of isooctyl nitrate.
The water removal test of the water removal agent prepared in the comparative example shows that the sorbitol monooleate antirust agent is not added into the raw material, and the emulsifying effect is poor compared with that of the example 2, because the sorbitol monooleate is not only an antirust agent with excellent performance, but also has certain emulsifying capacity for oil products, and the emulsifying capacity of diesel oil and water can be further promoted by the compound use of the sorbitol monooleate and tall oil diethanolamide.
Example 4
6 sets of experiments were designed, the basic procedure being the same as in example 1, except for the component contents of the raw materials, as specified in Table 1 below.
Table 1 raw material content table for six groups of water scavenger preparation experiments
Preparing a water removal agent by adopting each group of raw materials in the table 1, and performing water removal tests on the water removal agent, wherein 1-4 groups of tests show that the water removal agent prepared according to the raw material content in the range can enable water and diesel oil to quickly form stable emulsion; preferably, the results of the 2-3 test sets are the best. And 5-6 tests are adopted, namely the dehydrator prepared according to the raw material content outside the range of the invention has poor emulsification effect, and an emulsification layer is unstable and easy to separate, because the emulsification speed of the product is slow if the content of the tall oil diethanolamide is too low, diesel oil and water cannot be fully formed into an emulsion, and insufficient power can be generated during combustion; the high content of the water scavenger increases the viscosity of the water scavenger, reduces the dispersion and emulsification efficiency, and increases the cost. The antirust agent and the combustion improver can meet the requirement of use effect by selecting reasonable addition amount in consideration of the comprehensive cost of the product and the synergistic effect of the antirust agent and other components.
Example 5
Raw materials: 50% of organic solvent (10% of isopropanol and 40% of 2, 4-pentanediol), 35% of nonionic surfactant (15% of ethylene glycol monobutyl ether and 20% of tall oil diethanolamide), 10% of cyclohexyl nitrate and 5% of dodecenylsuccinic acid.
The preparation process comprises the following steps: and (3) sequentially adding each material into the stirring kettle according to the mass percentage, and uniformly stirring to prepare the water removing agent.
Example 6
Raw materials: 50% of organic solvent (10% of ethanol, 30% of 2, 4-pentanediol and 10% of mesitylene), 44% of tall oil diethanolamide, 5% of cyclohexyl nitrate and 1% of dodecenylsuccinic acid.
The preparation process comprises the following steps: and (3) sequentially adding each material into the stirring kettle according to the mass percentage, and uniformly stirring to prepare the water removing agent.
Comparative example 2
The basic procedure is the same as in example 2, except that instead of ethylene glycol monobutyl ether and/or tall oil diethanolamide as the nonionic surfactant in the feedstock, a conventional nonionic surfactant is used, as follows: 53% of isopropanol, 40% of nonylphenol polyoxyethylene ether (NP-10), 5.0% of isooctyl nitrate and 2.0% of sorbitol monooleate.
When the water removal agent prepared by the comparative example is subjected to a water removal test, the raw material does not adopt ethylene glycol monobutyl ether and/or tall oil diethanolamide as a nonionic surfactant, and the emulsifying effect is poor compared with that of the raw material in example 2, because the tall oil diethanolamide has high emulsifying speed and has an antirust function, and the conventional nonionic surfactant is more used as a detergent and needs to have weak emulsifying property under the action of sufficient mechanical stirring.
Comparative example 3
The basic procedure is the same as in example 2, except that sorbitol monooleate is not used as a rust inhibitor in the raw materials, but a conventional rust inhibitor is used, specifically as follows: 53% of isopropanol, 40% of tall oil diethanolamide, 5.0% of isooctyl nitrate and 2.0% of benzotriazole.
The water removal test of the water removal agent prepared in the comparative example shows that the raw material does not adopt sorbitol monooleate as an antirust agent, compared with the example 2, the emulsification effect is poor, because the sorbitol monooleate is adopted not only as the antirust agent, but also as an emulsifier, the emulsification efficiency is improved, and the combination of the sorbitol monooleate and tall oil diethanolamide can further promote the capacity of forming emulsion by diesel oil and water. And the conventional antirust agent benzotriazole can only be used as an antirust agent and does not have the emulsification enhancing effect.