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A refined naphthalene method for industrial naphthalene production

A technology for industrial naphthalene and refined naphthalene, applied in chemical instruments and methods, purification/separation of hydrocarbons, physical/chemical process catalysts, etc., can solve problems such as increasing processing costs, affecting the yield of refined naphthalene, and multiple hydrogen raw materials, to achieve The effect of improved desulfurization rate, good comprehensive economy and high purity

Active Publication Date: 2021-11-02
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Claims
  • Application Information

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Problems solved by technology

It can be seen that the problem existing in the prior art is the generation of tetralin by-products, thus affecting the yield of refined naphthalene, though adopting the method of tetralin circulation makes up some yields to a certain extent, but consumes More hydrogen feedstock is added, which increases processing costs

Method used

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  • A refined naphthalene method for industrial naphthalene production
  • A refined naphthalene method for industrial naphthalene production
  • A refined naphthalene method for industrial naphthalene production

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preparation example Construction

[0028] A kind of industrial naphthalene selective hydrogenation catalyst provided by an aspect of the embodiments of the present invention, the preparation method comprises:

[0029] 1) Preparation of carrier: mix pseudo-boehmite, short multi-walled carbon nanotubes, surfactant (such as polyethylene glycol octyl phenyl ether Triton X-100), and pore-enlarging agent (such as carbon black powder) After homogenization (the concentration of the surfactant in the obtained mixture is preferably 0.5-2.0 wt%), an extrusion aid (such as an aqueous solution of citric acid) is added, and the amount of the aqueous solution is added to meet the carrier molding, and then kneaded and extruded to obtain Strip carrier.

[0030] 2) The aqueous solutions of technetium and palladium metal component precursors are respectively sprayed and impregnated into the carrier obtained in step 1). Roasting treatment to obtain the selective hydrogenation catalyst.

[0031] In some embodiments, the industria...

Embodiment 1

[0044] Embodiment 1: the method that industrial naphthalene produces refined naphthalene in this embodiment refers to figure 1 shown. Wherein, the catalyst used in the selective hydrotreating reaction zone is A catalyst.

Embodiment 2

[0045] Embodiment 2: the method that industrial naphthalene produces refined naphthalene in this embodiment refers to figure 1 shown. Wherein, the catalyst used in the selective hydrotreating reaction zone is B catalyst.

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Abstract

The invention discloses a method for producing refined naphthalene from industrial naphthalene. Selective hydrogenation catalyst, the resulting reaction effluent is distilled through a rectification tower to obtain light, medium and heavy fractions, and the middle fraction is then crystallized to obtain refined naphthalene products. The method of the invention makes the desulfurization rate of industrial naphthalene more than 99.8 percent, makes full use of industrial naphthalene, obtains refined naphthalene products, and simultaneously produces gasoline blending components and methyl naphthalene oil products.

Description

technical field [0001] The invention relates to a processing method of industrial naphthalene, in particular to a method for producing refined naphthalene by adopting a novel selective hydrogenation catalyst to carry out selective hydrogenation reaction on industrial naphthalene, and then combining rectification and crystallization processes. Background technique [0002] Naphthalene is an important chemical raw material, mainly used for catalytic oxidation of phthalic anhydride and dye intermediates, and also used as cement water reducer, surfactant, plasticizer, polyester, synthetic fiber and medicine. More than 70% of domestic naphthalene depends on the coking industry. The technology of producing industrial naphthalene from coal tar is very mature, but the purity of industrial naphthalene is only 95%, which cannot meet its requirements as a raw material for fine chemicals. Fine chemicals produced with naphthalene as raw material All products require refined naphthalene w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C15/24C07C7/163C07C7/04C07C7/14B01J23/656B01J35/10
CPCC07C15/24C07C7/163C07C7/04C07C7/14B01J23/6565B01J35/635B01J35/647B01J35/615
Inventor 尹宏峰许杰
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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