A method for improving the rheological properties of coal tar pitch
A technology of rheological properties and coal tar pitch, applied in the processing of tar pitch/petroleum pitch/natural pitch, processing tar pitch/petroleum pitch/natural pitch by distillation, processing tar pitch/petroleum pitch/natural pitch by chemical methods, etc. , can solve the problems of not mentioning the recycling of hydrogenation reagents, the large amount of hydrogenation reagents used, and the high cost, and achieve the effects of increasing application value, reducing production costs, and reducing softening point
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Embodiment 1
[0027] A method for improving the rheological properties of coal tar pitch, comprising the following steps in turn:
[0028] (1) Add the hydrogen donor and coal tar pitch into the autoclave together according to the mass ratio of 1:19, close the autoclave and keep the reactor sealed; wherein, the softening point of coal tar pitch is 92°C, and the mass content of nitrogen element is 1.3% , the mass content of sulfur element is 0.6%, the mass content of oxygen element is 2.3%; the hydrogen donor is tetralin;
[0029] (2) Adjust the heating procedure of the autoclave, so that the materials in the autoclave are heated to 420°C at room temperature for 3 hours, and the hydrogenation reaction is carried out at a constant temperature of 420°C for 8 hours. After the temperature of the material in the kettle dropped to 280°C, and kept at a constant temperature for 10 hours, the residual hydrogen-donating agent was recovered by vacuum distillation. During the vacuum distillation process,...
Embodiment 2
[0033] A method for improving the rheological properties of coal tar pitch, comprising the following steps in turn:
[0034] (1) Add the hydrogen donor and coal tar pitch into the autoclave together according to the mass ratio of 6:5, close the autoclave and keep the reactor sealed; wherein, the softening point of coal tar pitch is 92°C, and the mass content of nitrogen element is 1.3% , the mass content of sulfur element is 0.6%, the mass content of oxygen element is 2.3%; the hydrogen donor is decalin;
[0035](2) Adjust the heating procedure of the autoclave so that the materials in the autoclave are heated to 440°C at room temperature for 3 hours, and the hydrogenation reaction is carried out at a constant temperature of 440°C for 8 hours. When the temperature of the material in the kettle is 300°C, the residual hydrogen-donating agent is recovered by vacuum distillation. During the vacuum distillation process, the pressure in the kettle is 0 MPa, and the constant temperat...
Embodiment 3
[0039] A method for improving the rheological properties of coal tar pitch, comprising the following steps in turn:
[0040] (1) Add the hydrogen donor and coal tar pitch into the autoclave together according to the mass ratio of 6:5, close the autoclave and keep the reactor sealed; wherein, the softening point of coal tar pitch is 92°C, and the mass content of nitrogen element is 1.3% , the mass content of sulfur element is 0.6%, the mass content of oxygen element is 2.3%; the hydrogen donor is tetrahydroquinoline;
[0041] (2) Adjust the heating procedure of the autoclave, so that the materials in the autoclave are heated at room temperature for 3 hours to reach 450 °C, and the hydrogenation reaction is carried out at a constant temperature of 450 °C for 12 hours. ; When the temperature of the material in the kettle drops to 150 °C, the residual hydrogen-donating agent is recovered by vacuum distillation. During the vacuum distillation process, the pressure in the kettle is ...
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Abstract
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