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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: 2014-07-23
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 solution of this embodiment includes the following steps:

[0028] (1) Preparation of catalyst: 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 sesame powder and appropriate amount of water to fully knead into a plastic paste, and extrude it into a shape (diameter 1.5 mm), dried at 120°C for 8 hours and baked at 550°C for 3 hours to obtain the carrier; take 3.2 g of stannous chloride (SnCl 2 ·2H 2 O) Dissolve 0.8 g of chloroplatinic acid in water to prepare 200 ml of solution, mix this solution with the carrier prepared above, evaporate to no water, dry at 130°C for 8 hours, and calcinate at 500°C for 4 hours to prepare a catalyst , Its weight composition is: Pt / Sn / ZSM-5 / K / SiO 2 =0.3 / 1.7 / 60 / 5 / 33, see Table 1;

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

[0030] (3) To evaluate the hydrogenation of naphthalene, the process co...

Embodiment 2

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

Embodiment 3

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

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Abstract

The invention discloses a method for producing cis-decalin by hydrogenating naphthalene. The method adopts a fixed-bed reactor, naphthalene and hydrogen-containing gas enter the reactor, and in the presence of a hydrogenation catalyst, hydrogenation reaction is carried out under hydrogenation reaction conditions to obtain cis-decalin, wherein the hydrogenation catalyst used is made of ZSM -5 molecular sieves, alkali metals, Group VIII metals, additives and silicon dioxide, the method adopts specific catalysts and suitable reaction conditions to make the content of cis-decalin generated by hydrogenation of naphthalene more than 60wt%, The separation and purification efficiency can be significantly improved and the production cost of the target product 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 Patents(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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