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Process for the production of 2,6‑diisopropylnaphthalene

A technology of diisopropylnaphthalene and isopropylnaphthalene is applied in the field of producing 2,6-diisopropylnaphthalene, and can solve the problems of many heavy components, fast catalyst deactivation, low selectivity and the like

Active Publication Date: 2017-09-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is that the prior art has the problems of low selectivity of 2,6-diisopropylnaphthalene, many heavy components, and fast deactivation of catalysts. A new method for producing 2,6-diisopropylnaphthalene is provided Propyl naphthalene method

Method used

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  • Process for the production of 2,6‑diisopropylnaphthalene
  • Process for the production of 2,6‑diisopropylnaphthalene
  • Process for the production of 2,6‑diisopropylnaphthalene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 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:

[0029] SiO 2 / Al 2 o 3 =100

[0030] NaOH / Al 2 o 3 =0.05

[0031] Dimethyldichlorosilane / SiO 2 =0.05

[0032] Hexamethyleneimine / SiO 2 =0.35

[0033] h 2 O / SiO 2 =20

[0034] 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.

[0035] After drying the sample was determined, its Si 29 The NMR solid-state nuclear magnetic spectrum peak appears at -18.4ppm. Its X-r...

Embodiment 2

[0042] 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:

[0043] SiO 2 / Al 2 o 3 =40

[0044] NaOH / Al 2 o 3 =0.05

[0045] Chlorotrimethylsilane / SiO 2 =0.06

[0046] Hexahydropyridine / SiO 2 =0.50

[0047] h 2 O / SiO 2 =15

[0048] 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.

[0049] 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

[0055] 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:

[0056] SiO 2 / Al 2 o 3 =20

[0057] NaOH / Al 2 o 3 =0.05

[0058] Hexamethyldisilazane / SiO 2 =0.04

[0059] Hexamethyleneimine / SiO 2 =0.50

[0060] h 2 O / SiO 2 =30

[0061] 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.

[0062] 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.

[0063] table 3

[0064]

[0065] Get 50...

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Abstract

The invention relates to a method for producing 2,6-diisopropylnaphthalene, which mainly solves the problems of low 2,6-diisopropylnaphthalene selectivity, many heavy components and fast catalyst deactivation in the prior art. The catalyst used in the present invention is organosilicon zeolite, and it comprises the composition of following molar relation: (1 / n) Al2O3: SiO2: (m / n) R, n=10~350 in the formula, m=0.02~50, R is At least one of alkyl, alkenyl or phenyl; the Si29NMR solid nuclear magnetic spectrum of the organosilicon-containing zeolite contains at least one Si29 NMR spectrum peak between -80~+50ppm; the organosilicon-containing zeolite X-ray diffraction pattern at 13.2±0.2, 12.3±0.1, 10.9±0.3, 9.1±0.3, 6.8±0.2, 6.1±0.2, 5.6±0.2, 4.4±0.3, 4.0±0.3, 3.6±0.2, 3.4±0.1 and 3.3±0.2 angstroms have a d-spacing maximum, which can be used in the industrial production of 2,6-diisopropylnaphthalene.

Description

technical field [0001] The present invention relates to a process for the production of 2,6-diisopropylnaphthalene. Background technique [0002] Diisopropylnaphthalene is a kind of colorless, odorless, low toxicity, low freezing point and widely used important organic chemical raw materials. Among them, 2,6-diisopropylnaphthalene is the raw material for the manufacture of high-performance polymer polyethylene 2,6-naphthalate (PEN). PEN has excellent qualities such as good heat resistance, gas barrier property, ultraviolet shielding and chemical resistance, and can be used to manufacture hot canned beverage bottles, recyclable beer bottles, high-end cosmetic bottles or high-performance films, and is currently a hot topic. new polyester material. In addition to the liquid-phase alkylation of naphthalene and propylene, the process for producing 2,6-diisopropylnaphthalene must also remove the by-products of the alkylation reaction, such as other isopropylnaphthalene and diiso...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C15/24C07C5/27C07C2/66C07C7/00B01J31/02C01B39/04
Inventor 姚晖高焕新顾瑞芳
Owner CHINA PETROLEUM & CHEM CORP