Method for producing 2, 6-diisopropylnaphthalene

A technology of diisopropylnaphthalene and naphthalene source is applied in the field of producing 2,6-diisopropylnaphthalene, which can solve the problems of difficulty in continuous preparation, easy deactivation of catalysts, etc., and achieves high activity, low cost, and improved The effect of mass transfer efficiency

Pending Publication Date: 2022-07-12
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, kettle reaction or fixed bed reaction process is mostly used in the isopropylation of naphthalene, and the catalyst is very easy to deactivate during the reaction (Journal of Catalysis220 (2003) 265–272), and it is difficult to achieve continuous preparation of 2,6-DIPN

Method used

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  • Method for producing 2, 6-diisopropylnaphthalene
  • Method for producing 2, 6-diisopropylnaphthalene
  • Method for producing 2, 6-diisopropylnaphthalene

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Example 1 Catalyst preparation

[0045] Take 100 g of MOR molecular sieve (Si / Al=19) and place it in a tube furnace, heat it up to 500°C under nitrogen protection, stop feeding nitrogen, inject 25% ammonia water, and the feeding amount is 100 g / h. After treatment for 60 min, The ammonia water feed was switched to nitrogen purging for 30 min to cool down. The resulting catalyst was named MOR(19)-500-60.

Embodiment 2～8

[0046] Embodiment 2~8 catalyst preparation

[0047] The operation steps are the same as those in Example 1, and the molecular sieve types, treatment temperature and time are shown in Table 1.

[0048] Table 1 Preparation conditions table of catalysts

[0049]

[0050]

[0051] Note: Si / (Si+Al+P)=0.20 in SAPO-5

[0052] Example 9 Evaluation of the reaction performance of the catalyst using a loop reactor

[0053] 1.0 kg of catalyst MOR(7)-500-60 was loaded into a tube furnace, activated under nitrogen protection at 500° C. for 240 min, and then lowered to room temperature. Add 1.0kg of catalyst into the batching kettle, add 33.0Kg of industrial naphthalene, stir evenly, replace it with inert gas nitrogen three times, seal the batching kettle, and heat it to 100°C, which is called slurry.

[0054] A loop reactor with an effective volume of 10L was charged with 1.0kg of naphthalene, replaced with nitrogen, sealed, raised to 180°C, and pressurized to 1.0MPa with nitrogen,...

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Abstract

The invention discloses a method for producing 2, 6-diisopropylnaphthalene, and particularly relates to a process for producing 2, 6-diisopropylnaphthalene by adopting a loop reactor, which comprises the following steps of: respectively injecting slurry containing a catalyst, molten naphthalene or 2-isopropylnaphthalene and an alkylation reagent into the loop reactor according to a certain proportion; and carrying out continuous reaction at a certain temperature and pressure to prepare the 2, 6-diisopropylnaphthalene. The loop reactor is adopted for reaction, so that the mass transfer efficiency and the mixing effect are effectively enhanced, and the reaction performance is improved.

Description

technical field [0001] The invention relates to a method for producing 2,6-diisopropylnaphthalene, in particular, to a method for producing 2,6-diisopropylnaphthalene by using a loop reactor for alkylation of naphthalene or 2-isopropylnaphthalene The method of base naphthalene belongs to the field of chemistry and chemical industry. Background technique [0002] 2,6-Dialkylnaphthalene is a key raw material for the production of high-performance polyester fibers and plastics. Polyethylene naphthalate (PEN) is obtained by the polymerization of its oxidation product, 2,6-naphthalenedicarboxylic acid and ethylene glycol. It is a new type of polyester material with great potential and application prospects. PEN has unique heat resistance, mechanical properties, gas barrier properties, chemical stability and radiation resistance, etc., and can be widely used in electronic components, instrumentation, insulating materials, food packaging films, beer bottles, aerospace and other ma...

Claims

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Application Information

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IPC IPC(8): C07C2/66C07C2/86C07C15/24
CPCC07C2/864C07C2/66C07C2529/85C07C2529/70C07C2529/03C07C2529/04C07C15/24Y02P20/584
Inventor 袁扬扬许磊赵晓炜张毅王弋戈
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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