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System and method for producing naphthenic base oil and low-point diesel oil from all-hydrogen type coal tar

A technology of naphthenic base oil and coal tar, which is applied in the field of coal chemical industry, can solve the problems of complex process, high active metal content of protective agent, and affecting the operation cycle of the device.

Active Publication Date: 2017-03-08
王树宽
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The patent publication number is CN 101940936A, and the Chinese patent titled "Coal Tar Hydrogenation Protective Agent and Its Preparation Method" adds K and P to the residual oil hydrogenation protective agent carrier to adjust the surface properties of the protective agent and tries to overcome the K The loss of the active component is one or more of W, Mo, Ni, Co, and the mass is 0.5% to 12%. Since coal tar contains a large amount of diolefins, hydrogenation is prone to condensation reactions, and the active metal content of the protective agent If it is too high, it will cause violent reaction and carbon deposition, and the dispersion of active metal needs to be further improved
The patent publication number is CN101507929A, and the invention title is "A Coal Tar Hydrogenation Modification Catalyst and Its Preparation Method and Application". The carrier is alumina and ZSM-5 molecular sieve, and the active metal is WO 3 , NiO, additive P 2 o 5 , the patent publication number is CN102688772B, the Chinese patent titled "A Hydrodesulfurization Catalyst for Removing Sulfur-Containing Compounds in Medium-low Temperature Coal Tar and Its Application", the carrier is alumina, silica, Hβ molecular sieve, patent CN 1772846A , the Chinese patent titled "A Catalyst for Hydrogenation and Modification of Coal Tar and Its Preparation and Application", the carrier is silica, alumina, modified Y-type molecular sieve, active metal W, Ni, Mo or W, Ni , the above coal tar hydrodesulfurization agents, denitrification agents, and modifier carriers all contain molecular sieves. Since coal tar hydrogenation generates a large amount of water accounting for 6% to 10% of the mass of coal tar, the hydrothermal stability of catalysts containing molecular sieves Poor, seriously affecting the operating cycle of the device
The patent publication number is CN 102626635A, and the Chinese patent titled "A Catalyst for Denitrification of Coal Tar and Its Preparation and Application" uses mesoporous alumina as the carrier, considering the hydrothermal stability of the carrier, but for coal tar. Mo and W active metals have poorer denitrification ability than W, Mo and Ni active metals
The process is more complicated and the yield is lower

Method used

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  • System and method for producing naphthenic base oil and low-point diesel oil from all-hydrogen type coal tar
  • System and method for producing naphthenic base oil and low-point diesel oil from all-hydrogen type coal tar
  • System and method for producing naphthenic base oil and low-point diesel oil from all-hydrogen type coal tar

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Embodiment 1

[0088] exist figure 1 Among them, the system for producing naphthenic base oil and low-point diesel oil from full-hydrogen coal tar in this embodiment consists of a coal tar refining device 1, a distillate oil deep refining device 2, a distillate oil isomerization depreciation post-refining device 3, and a low-temperature fraction The oil buffer tank 4, the medium-temperature distillate oil buffer tank 5, and the high-temperature distillate oil buffer tank 6 are connected to form. The output port of the coal tar refining device 1 is connected to the input port of the distillate deep refining device 2 through the low-temperature distillate oil buffer tank 4, the medium-temperature distillate oil buffer tank 5, and the high-temperature distillate oil buffer tank 6 respectively through pipelines. The output port of 2 is communicated with the input port of the refining device 3 after isomerization and decondensation of distillate oil through pipelines.

[0089] exist figure 2Am...

Embodiment 2

[0093] The method steps of adopting embodiment 1 system to prepare naphthenic base oil and low pour point diesel oil are as follows:

[0094] 1. Coal tar refining

[0095] After deslagging, dehydration, and desalination pretreatment, the medium / low temperature coal tar is mixed with hydrogen, and then heated to 220°C in the tar heating furnace 1-1, and enters the tar primary reactor 1-2 for reaction. The total space velocity is 0.2, and the reaction pressure is 12MPa, hydrogen oil ratio 1500:1. Tar primary reactor 1-2 is filled with protective catalyst and demetallization catalyst, and the main crystal phase of the carrier of the protective catalyst is α-Al 2 o 3 , the specific surface of the carrier is 5m 2 / g, pore volume 0.02ml / g, mesopores 4.0-40nm accounted for 45%-58%, macropores above 90000nm are more than 30%, pore distribution is unimodal, additives and active ingredients are made of the following mass ratio raw materials Composition, the rest is the carrier α-Al ...

Embodiment 3

[0125] The method steps of adopting embodiment 1 system to prepare naphthenic base oil and low pour point diesel oil are as follows:

[0126] 1. Coal tar refining

[0127] After deslagging, dehydration, and desalination pretreatment, the medium / low temperature coal tar is mixed with hydrogen, and then heated to 240°C in the tar heating furnace 1-1, and enters the tar primary reactor 1-2 for reaction. The total space velocity is 0.3, and the reaction pressure is 14MPa, hydrogen oil ratio 1800:1. Tar primary reactor 1-2 is filled with protective catalyst and demetallization catalyst, and the main crystal phase of the carrier of the protective catalyst is α-Al 2 o 3 , the specific surface of the carrier is 8m 2 / g, pore volume 0.3ml / g, mesopores 4.0-40nm accounted for 45%-58%, macropores above 90000nm are more than 30%, pore distribution is unimodal, additives and active ingredients are made of the following mass ratio raw materials Composition: The rest is the carrier α-Al ...

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Abstract

The invention provides a system for preparing naphthenic base oil and low freezing point diesel oil through all-hydrogen coal tar. The system is characterized in that an output opening of a coal tar refining device communicates with an input opening of a distillate oil deep refining device through a low-temperature distillate oil buffering tank, a medium-temperature distillate oil buffering tank and a high-temperature distillate oil buffering tank; the output opening of the distillate oil deep refining device communicates with the input opening of a distillate oil isomerization-visbreaking after-refining device. The method for preparing naphthenic base oil and low freezing point diesel oil by the system comprises the steps of refining coal tar, deeply refining the generated oil, and performing isomerization-visbreaking and after-refining. The naphthenic base oil and low freezing point diesel oil prepared by the system and method are detected according to national standard, and all detected indexes meet the national standard.

Description

technical field [0001] The invention belongs to the technical field of coal chemical industry, and in particular relates to the production of naphthenic base oil, low Condensed diesel. Background technique [0002] Coal tar is a liquid product of coal pyrolysis, containing a large amount of polycyclic and heterocyclic compounds such as oxygen, nitrogen, sulfur, and metals. Colloids and asphaltenes account for more than 50%, nitrogen content exceeds 1.2%, and oxygen exceeds 6%. , The molecular structure and composition are complex, and the content of metal ions, especially iron, calcium, and magnesium ions, is high. Coal tar hydrogenation technology is to remove metals, sulfur, nitrogen and other components that pollute the environment in coal tar through hydrogenation reaction, and produce environmentally friendly clean fuels and chemical raw materials. Coal tar hydrogenation technology currently mainly includes whole fraction hydrogenation technology, wide fraction hydrog...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G69/00
CPCC10G69/00C10G2400/06
Inventor 杨占彪王树宽
Owner 王树宽