Protective agent of coal tar hydrogenation catalyst and preparation method of protective agent

A hydrogenation catalyst and coal tar technology, which is applied in the direction of catalyst protection, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of cumbersome process, achieve simple process, improve demetallization activity, and good stability

Active Publication Date: 2014-04-09
NINGBO JINYUANDONG PETROCHEM ENG TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the requirements for pseudo-boehmite raw materials are relatively high, and the process is relatively cumbersome

Method used

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  • Protective agent of coal tar hydrogenation catalyst and preparation method of protective agent
  • Protective agent of coal tar hydrogenation catalyst and preparation method of protective agent
  • Protective agent of coal tar hydrogenation catalyst and preparation method of protective agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Take the calculated amount of pseudo-boehmite and zirconium nitrate and mix evenly, add nitric acid accounting for 1% of the total solid mass, 1% of activated carbon with a particle size of 600 mesh, 10% of polystyrene balls with a particle size of 100 mesh, and 1% of cinnamon Powder, and a small amount of water, kneaded evenly and extruded into a four-leaf clover shape, the molded carrier was dried in an oven at 120°C for 8 hours, and baked in a muffle furnace at 800°C for 8 hours to obtain the protective agent carrier of the present invention.

[0028] Take the calculated amount of ammonium molybdate, ammonium tungstate, phosphoric acid, and potassium nitrate to make a solution, impregnate the carrier prepared above for 4 hours, dry in an oven at 120°C for 12 hours, and roast in a muffle furnace at 500°C for 6 hours to obtain the final Protective agent C1 for coal tar hydrogenation catalyst.

Embodiment 2

[0030] Take the calculated amount of pseudo-boehmite and zirconium nitrate and mix evenly, add nitric acid accounting for 1% of the total solid mass, 1% of activated carbon with a particle size of 600 mesh, 25% of polystyrene balls with a particle size of 100 mesh, and 1% of the Powder, and a small amount of water, kneaded evenly and extruded into a four-leaf clover shape, the molded carrier was dried in an oven at 120°C for 8 hours, and baked in a muffle furnace at 800°C for 8 hours to obtain the protective agent carrier of the present invention.

[0031] Take the calculated amount of ammonium molybdate, ammonium tungstate, phosphoric acid, and potassium carbonate to form a solution, impregnate the carrier prepared above for 6 hours, dry it in an oven at 120°C for 12 hours, and roast it in a muffle furnace at 500°C for 6 hours to obtain the final Protective agent C2 for coal tar hydrogenation catalyst.

Embodiment 3

[0033] Take the calculated amount of pseudo-boehmite and zirconia and mix evenly, add nitric acid accounting for 1% of the total solid mass, 3% of activated carbon with a particle diameter of 500 mesh, 25% of polymethylmethacrylate microspheres with a particle diameter of 100 mesh, 1 % of scallop powder, and a small amount of water, knead evenly and extrude into the shape of a four-leaf clover. The formed carrier is dried in an oven at 120°C for 8 hours, and roasted in a muffle furnace at 800°C for 8 hours to obtain the protection of the present invention. agent carrier.

[0034] Take the calculated amount of ammonium molybdate, nickel nitrate, ammonium dihydrogen phosphate, and potassium nitrate to form a solution, impregnate the carrier prepared above for 4 hours, dry it in an oven at 120°C for 12 hours, and bake it in a muffle furnace at 500°C for 6 hours. Obtain the protective agent C3 of the final coal tar hydrogenation catalyst.

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Abstract

The invention discloses a protective agent of a coal tar hydrogenation catalyst and a preparation method of the protective agent. The protective agent is composed of three parts, namely carriers, active components and assistants, wherein the carriers include aluminium oxide and zirconium oxide in common; the active components include oxides of molybdenum, nickel or tungsten in common and account for 1-10% of total mass of the catalyst; the assistants include potassium and phosphorus in common, and account for 0.5-6% of total mass of the catalyst, and the balance is the carriers. The preparation method comprises preparation of the carrier and preparation of the protective agent. The protective agent has the advantages that the carrier comprises fine holes and thick holes, of which the apertures are relatively concentrated, wherein the thick holes are beneficial to containing metal impurities and carbon residue; a pressure drop of a catalyst bed is reduced, the hydrogenation catalyst is protected, removal of metal impurities such as vanadium is facilitated by the thin holes, the demetallization activity of the protective agent is properly improved, and different pore volumes and hole distribution of carriers can be prepared by adjusting the ratio of two pore forming materials. In addition, the preparation method of the protective agent is simple in technology, and convenient and stable to fabricate.

Description

technical field [0001] The invention relates to the technical field of coal chemical industry, in particular to a protective agent for a coal tar hydrogenation catalyst and a preparation method thereof. Background technique [0002] Coal tar, also known as coal paste and coal distillate, is a black or dark brown viscous liquid obtained in the process of coal coking. Coal tar is the main raw material of the coal chemical industry, and its components amount to tens of thousands of kinds, mainly containing aromatic hydrocarbons such as benzene, toluene, xylene, naphthalene, anthracene, aromatic oxygen-containing compounds, nitrogen-containing, sulfur-containing, and metal-containing heterocycles Coal tar can be divided into fractions of different boiling point ranges by fractional distillation, including light oil (<170°C), phenol oil (170-210°C), naphthalene oil (210-230°C), washing Oil (230-300°C), anthracene oil (300-360°C) and asphalt (>360°C). [0003] my country i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J33/00B01J27/19C10G45/08C10G47/12
Inventor 项文裕项裕桥胡义波王华
Owner NINGBO JINYUANDONG PETROCHEM ENG TECH
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