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Method for preparing diisopropylnaphthalene through transalkylation reaction

A technology of diisopropylnaphthalene and alkyl transfer, which is applied in the direction of chemical instruments and methods, hydrocarbons, organic compounds/hydrides/coordination complex catalysts, etc., and can solve the problems of low conversion rate of naphthalene, carbon deposition on catalysts, Fast deactivation and other issues

Inactive Publication Date: 2016-01-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is that the conversion rate of naphthalene is low in the prior art, the catalyst has serious carbon deposition, and the problem of deactivation is fast, and a new method for preparing diisopropylnaphthalene by transalkylation reaction is provided

Method used

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  • Method for preparing diisopropylnaphthalene through transalkylation reaction
  • Method for preparing diisopropylnaphthalene through transalkylation reaction
  • Method for preparing diisopropylnaphthalene through transalkylation reaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Sodium aluminate (containing 42.0% by weight Al 2 o 3 ) 6.1 grams and 2.0 grams of sodium hydroxide are dissolved in 270 grams of water, then add 34.7 grams of hexamethyleneimine under the situation of stirring, then add 150 grams of silica sol (containing 40% by weight SiO 2 ), dimethyldichlorosilane 6.5 grams, the material proportion (mol ratio) of reactant is:

[0033]SiO 2 / Al 2 o 3 =100

[0034] NaOH / Al 2 o 3 =0.05

[0035] Dimethyldichlorosilane / SiO 2 =0.05

[0036] Hexamethyleneimine / SiO 2 =0.35

[0037] h 2 O / SiO 2 =20

[0038] After the reaction mixture was stirred evenly, it was put into a stainless steel reaction kettle, and crystallized at 150° C. for 55 hours while stirring. After taking out, it is filtered, washed and dried. SiO was obtained by chemical analysis 2 / Al 2 o 3 The molar ratio was 42.3.

[0039] After drying the sample was determined, its Si 29 The NMR solid-state nuclear magnetic spectrum peak appears at -18.4ppm. Its X-...

Embodiment 2

[0046] Sodium aluminate (containing 42.0% by weight Al 2 o 3 ) 6.1 grams and 2.0 grams of sodium hydroxide are dissolved in 180 grams of water, then add 6.6 grams of trimethylchlorosilane, 43.0 grams of hexahydropyridine, and then add 150 grams of silica sol (containing 40% by weight of SiO 2 ), the material ratio (molar ratio) of reactant is:

[0047] SiO 2 / Al 2 o 3 =40

[0048] NaOH / Al 2 o 3 =0.05

[0049] Chlorotrimethylsilane / SiO 2 =0.06

[0050] Hexahydropyridine / SiO 2 =0.50

[0051] h 2 O / SiO 2 =15

[0052] After the reaction mixture was stirred evenly, it was put into a stainless steel reaction kettle, and crystallized at 152° C. for 50 hours while stirring. After taking out, it is filtered, washed and dried. SiO was obtained by chemical analysis 2 / Al 2 o 3 The molar ratio was 42.1.

[0053] After drying the sample was determined, its Si 29 The NMR solid-state nuclear magnetic spectrum peak appears at 15.2ppm. Its X-ray diffraction data are shown...

Embodiment 3

[0059] Dissolve 5.1 grams of aluminum oxide and 2.0 grams of sodium hydroxide in 540 grams of water, then add 42.5 grams of hexamethyleneimine while stirring, then add 60 grams of solid silicon oxide and 3.2 grams of hexamethyldisilazane , the material ratio (molar ratio) of reactant is:

[0060] SiO 2 / Al 2 o 3 =20

[0061] NaOH / Al 2 o 3 =0.05

[0062] Hexamethyldisilazane / SiO 2 =0.04

[0063] Hexamethyleneimine / SiO 2 =0.50

[0064] h 2 O / SiO 2 =30

[0065] After the reaction mixture was stirred evenly, it was put into a stainless steel reaction kettle, and crystallized at 163° C. for 50 hours while stirring. After taking out, it is filtered, washed and dried. SiO was obtained by chemical analysis 2 / Al 2 o 3 The molar ratio was 17.7.

[0066] After drying the sample was determined, its Si 29 The NMR solid-state nuclear magnetic spectrum peak appears at 15.8ppm. Its X-ray diffraction data are shown in Table 3.

[0067] table 3

[0068]

[0069] Get 50...

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Abstract

The invention relates to a method for preparing diisopropylnaphthalene through a transalkylation reaction to mainly solve the problems of low naphthalene conversion rate, and severe carbon formation and fast inactivation of catalysts existing in the prior art. A catalyst used in the invention is organosilicon zeolite, the molar relation composition of the organosilicon zeolite is (1 / n)Al2O3:SiO2:(m / n)R, wherein n is 10-350, m is 0.02-50, and R is at least one of an alkyl group, an alkenyl group or a phenyl group; and the Si<29> NMR solid nuclear magnetic atlas of the organosilicon zeolite includes at least one Si<29> nuclear magnetic resonance spectrum peak in a range of -80 ~ +50ppm; and the X-ray diffraction atlas of the organosilicon zeolite has d-spacing maximums in 13.2+ / -0.2 angstroms, 12.3+ / -0.1 angstroms, 10.9+ / -0.3 angstroms, 9.1+ / -0.3 angstroms, 6.8+ / -0.2 angstroms, 6.1+ / -0.2 angstroms, 5.6+ / -0.2 angstroms, 4.4+ / -0.3 angstroms, 4.0+ / -0.3 angstroms, 3.6+ / -0.2 angstroms, 3.4+ / -0.1 angstroms and 3.3+ / -0.2 angstroms. The method can be used in industrial production for preparing diisopropylnaphthalene.

Description

technical field [0001] The invention relates to a method for preparing diisopropylnaphthalene by transalkylation reaction. Background technique [0002] Diisopropylnaphthalene is a class of compounds with a wide range of uses. 2,6-Diisopropylnaphthalene is an important raw material for the manufacture of high-performance polymer polyethylene 2,6-naphthalene (PEN), and mixed diisopropylnaphthalene is an excellent carbonless copy paper dye solvent and paint thinner agent and so on. [0003] The production of diisopropylnaphthalene generally adopts the liquid-phase alkylation method of naphthalene and propylene, and can also use naphthalene and polyisopropylbenzene as raw materials and adopt the transalkylation reaction method. Catalysts generally use zeolite catalysts including β, Y, mercerite and the like. [0004] U.S. Patent No. 5,026,942 and U.S. Patent No. 5,003,122 disclose the use of an acidic molecular sieve containing a 12-membered ring with a certain silicon-alumi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C15/24C07C2/66B01J31/02
Inventor 姚晖高焕新季树芳
Owner CHINA PETROLEUM & CHEM CORP