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Method for producing cis-decahydronaphthalene through naphthalene hydrogenation

A technology of cis-decalin and hydrogenation reaction, applied in the field of naphthalene hydrogenation, can solve problems such as increasing the production cost of the target product, and achieve the effects of reducing the rate and reducing the concentration

Active Publication Date: 2012-12-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such a mixture is difficult to meet the requirements in some applications. To obtain a pure product, it must go through a complicated separation process, which greatly increases the production cost of the target product.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The specific scheme of the present embodiment comprises the following steps:

[0028] (1) Catalyst preparation: Take 60 grams of pure silicon ZSM-5 molecular sieve, 7.2 grams of potassium hydroxide, 35 grams of white carbon black, 6 grams of asparagus powder and an appropriate amount of water to fully knead into a plastic paste, extrusion molding (diameter 1.5 mm), dried at 120°C for 8 hours and calcined at 550°C for 3 hours to obtain the carrier; take 3.2 grams of stannous chloride (SnCl 2 2H 2 O) and 0.8 g of chloroplatinic acid were dissolved in water to form a 200 ml solution. The solution was fully mixed with the carrier prepared above, evaporated to ignorant water, dried at 130°C for 8 hours, and calcined at 500°C for 4 hours to prepare the catalyst , and its weight composition is: Pt / Sn / ZSM-5 / K / SiO 2 =0.3 / 1.7 / 60 / 5 / 33, see Table 1;

[0029] (2) Carry out pre-reduction treatment on the catalyst, the conditions are shown in Table 1;

[0030] (3) To evaluate the ...

Embodiment 2

[0032] This embodiment is the same as embodiment 1, and the difference is that the catalyst used is composed of: Rh / Sn / ZSM-5 / K / SiO 2 =0.3 / 1.7 / 60 / 5 / 33, in the process conditions of step (3), the total pressure is 3.0MPa, the reaction gas is nitrogen and hydrogen, the partial pressure ratio is 5:1, the code is E-2, the catalyst pre-reduction condition See Table 1 and the evaluation results in Table 2.

Embodiment 3

[0034] This embodiment is the same as embodiment 1, and the difference is that the catalyst used is composed of: Pt / Sb / ZSM-5 / K / SiO 2 =0.3 / 1.7 / 60 / 5 / 33, in the process conditions of step (3), the total pressure is 5.0MPa, the reaction gas is nitrogen and hydrogen, the partial pressure ratio is 8:1, the code is E-3, the catalyst pre-reduction condition See Table 1 and the evaluation results in Table 2.

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Abstract

The present invention discloses a method for producing cis-decahydronaphthalene through naphthalene hydrogenation. According to the method, a fixed bed reactor is adopted; naphthalene and hydrogen-containing gas enter the reactor; in the presence of a hydrogenation catalyst, a hydrogenation reaction is performed under a hydrogenation reaction condition to obtain the cis-decahydronaphthalene, wherein the hydrogenation catalyst comprises a ZSM-5 molecular sieve, an alkali metal, a VIII group metal, an auxiliary agent and silicon dioxide. With the method of the present invention, the specific catalyst and the suitable reaction condition are adopted, such that the content of the cis-decahydronaphthalene produced through naphthalene hydrogenation can be more than 60 wt%, separation purification efficiency can be significantly improved, and target product production cost can be reduced.

Description

technical field [0001] The invention relates to a method for hydrogenation of naphthalene, in particular to a method for hydrogenation of naphthalene to produce cis-decalin. Background technique [0002] Decalin is a fused-ring hydrocarbon with two configurations, trans and cis. Decalin has very extensive and important applications in the chemical industry, electronics industry (for example, decalin derivatives are excellent liquid crystal raw materials) and pharmaceutical industries. For example, decahydronaphthalene can be used as a solvent for ultra-high molecular weight polyethylene, It can also be used as lubricant, fat extractant, solvent for paint, grease, resin, rubber, etc., paint remover and hydrogen storage material for dispersed fuel cells, etc. Trans-decalin and cis-decalin also have their own uses: the thermal stability of trans-decalin is better than that of long-chain alkanes, and it is an essential additive component to improve the thermal stability of avia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C13/50C07C5/10B01J29/44
Inventor 刘全杰徐会青贾立明王伟
Owner CHINA PETROLEUM & CHEM CORP
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