Coal-based synthetic diesel oil lubricity improver, preparation method and application thereof
A coal-based synthesis and lubricity technology, used in the petroleum industry, liquid carbon-containing fuels, fuels, etc., can solve problems such as the decline of diesel lubricity, engine fuel injection pump wear, and insufficient lubricity of coal-based synthetic diesel, reaching a wide range of Promote the application, the effect of the simple process
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[0034] In addition, if figure 1 As shown, this embodiment also provides a method for preparing a coal-based synthetic diesel lubricity improver, comprising the following steps:
[0035] Step S110: Add a mixture of various hydroxy-substituted carboxylic acid esters and amides to the reaction kettle, stir and mix evenly, and at the same time start to slowly heat up, wherein the mixture composed of various hydroxy-substituted carboxylic acid esters has A mixture of at least two compounds of the following formula (I), amides having the formula (II):
[0036] R1-COO-R2 (I), wherein R1 is a C1-C18 hydrocarbon group, R2 is a C2-C18 hydroxyl-substituted alkyl group,
[0037] (II), wherein R3, R4, and R5 are C1-C5 alkyl groups, respectively.
[0038] Step S120: When the reaction temperature rises to 40°C, slowly add the alcohol amine compound into the reaction kettle, and control the addition of the alcohol amine compound within 8 to 10 minutes, and continue to raise the temperatur...
Embodiment 1
[0046] (1) The mixture of hexaglyceryl dilaurate and hexaglycerol monolaurate and 25% of the total weight of the lubricity improver are pumped into the reaction kettle respectively, and then Start stirring while slowly heating up;
[0047] (2) When the temperature rises to 40°C, slowly add 5% ethanolamine of the total weight of the lubricity improver into the reaction kettle, and finish adding within 8 to 10 minutes;
[0048](3) When the reaction temperature rises to 55°C, start recording the reaction time, and at the same time control the reaction temperature at about 60°C, and control the reaction time at about 35 minutes;
[0049] (4) After reaching the specified reaction time, stop heating, and after cooling to room temperature, immediately filter and pack into barrels.
[0050] The lubricity improver synthesized in Example 1 was added into the coal-based synthetic diesel in the amount of 250ppm and 350ppm, and the lubricity of the mixed sample was tested after stirring e...
Embodiment 2
[0053] (1) A mixture of glycerol laurate linoleate and sorbitan linoleate with a total weight of 80% of the lubricity improver and dimethylacetamide with a total weight of 15% are pumped into the reactor respectively, and then Start stirring while slowly heating up;
[0054] (2) When the temperature rises to 40°C, slowly add monoethanolamine with a total weight of 5% of the lubricity improver into the reaction kettle, and complete the addition within 8 to 10 minutes;
[0055] (3) When the reaction temperature rises to 55°C, start recording the reaction time, and at the same time control the reaction temperature at about 60°C, and the reaction time is about 35 minutes;
[0056] (4) After reaching the specified reaction time, stop heating, and after cooling to room temperature, immediately filter and pack into barrels.
[0057] The lubricity improver synthesized in Example 2 was added into the coal-based synthetic diesel in the amount of 250ppm and 350ppm, and the lubricity of ...
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