Method for nathphalene alkylation

A technology of decalinyl and decalinyl, which is applied in the field of decalinylation and can solve the problems of easy deactivation of catalysts, low type selectivity, etc.

Active Publication Date: 2016-02-03
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 catalyst is easily deactivated and the shape selectivity is not high in the naphthalene alkylation reaction in the prior art

Method used

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  • Method for nathphalene alkylation

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Take 50g water glass (SiO2 Content is 27.20wt%, modulus is 3.2), 0.85g aluminum sulfate, 96wt% sodium hydroxide 1.0g, deionized water 50g, 70wt% ethylamine aqueous solution 50g, ZSM-5 crystal seed 0.5g, mix to form The gel was left to stand for 6 hours, and then crystallized at 170°C for 14 hours. A white solid was obtained by filtration, and the solid was repeatedly washed with deionized water until the pH test paper was tested to be neutral. Drying gave 10.3 g of uncalcined powder. It is ZSM-5 zeolite by X-ray powder diffraction analysis.

[0028] (2) Take 10.3g of the powder obtained in the previous step, and use 1mol / L Mg(NO 3 ) 2 The 200ml solution was exchanged three times at room temperature, each time for 8 hours.

[0029] (3) Take the solid exchanged in the previous step, dry it, and roast it at 550° C. for 6 hours, and shape it to obtain a finished catalyst.

[0030] (4) The evaluation of the alkylation reaction of naphthalene and propylene was perfor...

Embodiment 2

[0033] (1) 600 grams of 40% silica sol, 38.9 grams of sodium aluminate (42% alumina content), 70.6 grams of 25% tetraethylammonium hydroxide (TEAOH), 5.0 grams of diethylamine (DEA), 168.0 grams of tetraethylammonium hydroxide Ethylammonium bromide (TEABr), 16.0 grams of sodium hydroxide, 136.0 grams of 25% ammonium hydroxide and 925.1 grams of water were mixed and stirred evenly at room temperature. Then, it was transferred to a stainless steel autoclave with a crystallization temperature of 140° C. and reacted for 96 hours. After the reaction, the crystalline product was filtered, washed with deionized water, and dried. According to X-ray powder diffraction analysis, it is zeolite beta with BEA structure.

[0034] (2) Take 200g of the powder obtained in the previous step, and use 1mol / L of Mg(NO 3 ) 2 The solution was exchanged three times at 80°C with 2000ml of solution, each time for 8 hours.

[0035] (3) Take the solid exchanged in the previous step, dry it, and roast...

Embodiment 3

[0039] (1) Get aluminum tert-butoxide (wt97%) 5g, diethyldimethylammonium hydroxide (wt20%) 160g, sodium hydroxide 8g mix, then add 160gTEOS (wt98%) and 140g deionized water wherein, Stir well at room temperature. Then it was transferred to a 1L stainless steel crystallization kettle, and stirred and crystallized at 150°C for 96 hours. After the crystallization reaction is completed, filter, wash the crystalline product with deionized water, and dry. According to X-ray powder diffraction analysis, it is UZM-8 zeolite with layered structure.

[0040] (2) Take 35 g of the powder obtained in the previous step, and exchange it with 500 ml of 2 mol / L magnesium chloride solution at 80° C. for three times, each time for 8 hours.

[0041] (3) Take the solid exchanged in the previous step, dry it, and roast it at 550° C. for 6 hours, and shape it to obtain a finished catalyst.

[0042] (4) Carry out the isomerization reaction of diisopropylnaphthalene on a 100ml reactor device, and ...

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Abstract

The invention relates to a method for nathphalene alkylation, and mainly aims to solve the problems of relatively poor catalyst selectivity and high inactivation in the prior art. The method comprises the following steps: a), adopting a silicon source, an aluminum source and an organic amine template as raw materials, carrying out hydrothermal crystallization and deionized water washing in sequence to obtain a zeolite precursor material; b), conducting ion exchange on the obtained zeolite precursor material for modification, calcining the modified material to obtain a nathphalene alkylation catalyst; c) applying the nathphalene alkylation catalyst to a nathphalene alkylation reaction, wherein ions adopted for ion exchange are at least one of alkaline-earth metal ions and lanthanum metal ions. The method has the advantages that the problem of relatively poor catalyst selectivity in the prior art is solved relatively well, and the suitability to industrial production of nathphalene alkylation is very high.

Description

technical field [0001] The present invention relates to a method for alkylation of naphthalene. Background technique [0002] 2,6-dialkylnaphthalene can be oxidized to synthesize 2,6-naphthalene diacid (2,6-DNA), and 2,6-naphthalene diacid is a new type of high-performance polyester material-polyethylene naphthalate The raw material of glycol ester (PEN), compared with polybutylene terephthalate (PET), the performance of PEN is much better. PEN has superior heat resistance, mechanical properties, chemical stability, gas barrier and UV and radiation resistance; PEN has good transparency like PET, and the advantage of PEN over PET is that its use temperature is 35-55 °C higher , the tensile strength is 50% higher, and the barrier performance is 5 times higher; other markets of PEN are in the manufacture of laminates, copolymers and blends, and the application prospects are very broad. Since the 1990s, major foreign plastic manufacturers and application companies have investe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C2/66C07C2/86C07C5/27C07C6/12C07C15/24B01J29/40B01J29/70
Inventor 刘远林高焕新姚晖
Owner CHINA PETROLEUM & CHEM CORP
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