Catalyst for preparation of 2,6-dimethylnaphthalene as well as preparation and application of catalyst

A dimethylnaphthalene catalyst, a catalyst technology, applied in the directions of catalysts, molecular sieve catalysts, carbon compound catalysts, etc., can solve the problem that the catalyst cannot be high at the same time, and achieve the effects of improving accessibility, improving catalytic performance, and mild reaction conditions

Active Publication Date: 2017-10-20
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that existing catalysts cannot have higher activity and 2,6-DMN selectivity simultaneo

Method used

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  • Catalyst for preparation of 2,6-dimethylnaphthalene as well as preparation and application of catalyst
  • Catalyst for preparation of 2,6-dimethylnaphthalene as well as preparation and application of catalyst
  • Catalyst for preparation of 2,6-dimethylnaphthalene as well as preparation and application of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: Preparation of seed solution

[0024] Combine 14.57g pseudo-boehmite (70%), 18.43g phosphoric acid (85%), 11.13g di-n-propylamine (DPA) and 60.55g water in a molar ratio of 1.1DPA: 1.0Al 2 O 3 :0.8P 2 O 5 :40H 2 The initial gel mixture was prepared by O, and hydrothermally crystallized at 100°C for 24 hours to obtain AlPO-11 seed solution A.

Embodiment 2

[0025] Example 2: Preparation of seed solution

[0026] Combine 14.57g pseudo-boehmite (70%), 27.65g phosphoric acid (85%), 11.13g diisopropylamine (DIPA) and 42.55g water according to the molar ratio of 1.0DIPA: 1.0Al 2 O 3 : 1.2P 2 O 5 :30H 2 O prepares the initial gel mixture and hydrothermally crystallizes it at 180°C for 12 hours to obtain AlPO-11 seed solution B.

Embodiment 3

[0027] Example 3: Catalyst preparation

[0028] 0.017g cerium oxide, 14.57g pseudo-boehmite (70%), 18.43g phosphoric acid (85%), 0.2g silica sol (30%), 12.14g di-n-propylamine (DPA), 0.51g F-127( The molecular weight is 12600) and 42.55g water is 1.2DPA: 0.001CeO in molar ratio 2 : 1.0Al 2 O 3 :0.8P 2 O 5 :0.01SiO 2 :30H 2 O prepare the initial gel mixture, mix well, add 2.09g seed solution A, stir the mixture evenly and dry, grind to obtain the dry glue fine powder, then place it on the support inside the stainless steel reactor, add 5ml to the bottom of the reactor Water and 5ml of di-n-propylamine, the liquid surface cannot be in contact with the dry glue, crystallize at 200°C for 24 hours, wash, dry, and roast to obtain a sponge-like porous structure CeAPSO-11 molecular sieve, labeled as NMAC-1.

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Abstract

The invention discloses a high-performance catalyst for preparing 2,6-dimethylnaphthalene through alkylation of 2-methylnaphthalene as well as a preparation method and an application of the catalyst. The catalyst is a CeAPSO-11 molecular sieve with a spongy porous structure, contains micropores and rich mesoporous structures and has large external specific surface area, and the accessibility to acid sites in macromolecular reactions is effectively improved. The catalyst has relatively high activity and 2,6-DMN selectivity as well as relatively high carbon deposition resistance when used for a reaction for preparing 2,6-dimethylnaphthalene through alkylation of 2-methylnaphthalene and methanol or dimethyl ether.

Description

Technical field [0001] The invention belongs to the field of chemistry and chemical engineering, and specifically relates to a catalyst for preparing 2,6-dimethylnaphthalene by alkylation of 2-methylnaphthalene, and a preparation method and application thereof. Background technique [0002] Polyethylene naphthalate (PEN) is a new type of polyester material with great potential and application prospects, due to its unique heat resistance, mechanical properties, gas barrier properties, chemical stability and radiation resistance, etc. It can be widely used in manufacturing industries such as electronic components, instrumentation, insulating materials, food packaging films, beer bottles, and aerospace. However, the current bottleneck restricting the large-scale application of PEN is the cumbersome preparation process of its key raw material 2,6-dialkylnaphthalene and the high production cost. my country is rich in naphthalene and methylnaphthalene resources. The synthesis of 2,6-d...

Claims

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Application Information

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IPC IPC(8): B01J29/84C07C2/86B01J35/10C07C15/24
CPCB01J29/84B01J35/1019B01J35/1023B01J35/1042B01J35/1061B01J2229/183C07C2/864C07C2529/84C07C15/24
Inventor 袁扬扬于锦军许磊周小野张新建田兆伟
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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