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Purification method of 2,6-diisopropylnaphthalene

A diisopropylnaphthalene and purification method technology, which is applied in the field of purification of 2,6-diisopropylnaphthalene, can solve the problems of low product purity and high energy consumption, and achieve good technical effects and energy consumption reduction effects

Active Publication Date: 2020-12-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is the problems of low product purity and high energy consumption in the existing production method of 2,6-diisopropylnaphthalene, and a new purification method for 2,6-diisopropylnaphthalene is provided method

Method used

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  • Purification method of 2,6-diisopropylnaphthalene

Examples

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Effect test

Embodiment 1

[0023] The purification method of 2,6-diisopropylnaphthalene of the present invention.

[0024] Such as figure 1 Said, the mixed raw material 1 containing 2,6-diisopropylnaphthalene, the concentration of 2,6-diisopropylnaphthalene is 10%, through the rectification of two pre-separation towers A and A', the boiling point A light component 2 with a lower boiling point than 2,6-diisopropylnaphthalene and a heavy component 3 with a higher boiling point than 2,6-diisopropylnaphthalene to obtain an intermediate component 4 containing 2,6-diisopropylnaphthalene ; The concentration of 2,6-diisopropylnaphthalene in the intermediate component 4 containing 2,6-diisopropylnaphthalene is 40%, and it enters the primary crystallizer B for suspension melting crystallization, and the crystallization temperature is -12°C , the obtained crystal slurry I5 was separated by solid-liquid separator IC to obtain 2,6-diisopropylnaphthalene coarse crystal 6 and primary crystallization mother liquor 7, ...

Embodiment 2

[0026] The purification method of 2,6-diisopropylnaphthalene of the present invention.

[0027] Such as figure 1 Said, according to the operating conditions of Example 1, wherein the concentration of 2,6-diisopropylnaphthalene in the intermediate component 4 is 45%, the results are listed in Table 1.

Embodiment 3

[0029] The purification method of 2,6-diisopropylnaphthalene of the present invention.

[0030] Such as figure 1 Said, according to the operating conditions of Example 1, wherein the concentration of 2,6-diisopropylnaphthalene in the intermediate component 4 is 50%, the results are listed in Table 1.

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Abstract

The invention relates to a purification method for 2,6-diisopropylnaphthalene. High-purity 2,6-diisopropylnaphthalene is produced by using a two-stage levitation melting and crystallization process. The method comprises the following steps: rectifying raw materials for pre-separation so as to separate light components with boiling points lower than 2,6-diisopropylnaphthalene and heavy components with boiling points higher than 2,6-diisopropylnaphthalene; with an obtained intermediate component containing 2,6-diisopropylnaphthalene as crystallization raw materials, carrying out primary meltingand crystallization to obtain crude 2,6-diisopropylnaphthalene crystals; and then carrying out secondary melting and crystallization to obtain a 2,6-diisopropylnaphthalene crystal product. With such atechnical scheme, the purification method provided by the invention overcomes the problems of low product purity and high energy consumption in the prior art and can be applied to production of 2,6-diisopropylnaphthalene.

Description

technical field [0001] The invention relates to a method for purifying 2,6-diisopropylnaphthalene. Background technique [0002] 2,6-Diisopropylnaphthalene (2,6-DIPN) is an important organic chemical raw material. After oxidation, 2,6-naphthalene dicarboxylic acid (2,6-NDA) is esterified with ethylene glycol. Polyethylene naphthalate (PEN) obtained by polycondensation is a new type of high-performance polyester material. The high symmetry of the PEN structure makes it have the characteristics of a linear polymer. Compared with the phenyl polymer PET, it has better gas barrier properties, heat resistance, mechanical properties, radiation resistance, chemical stability and dimensional stability. It is more superior in aspect and will gradually replace the currently widely used PET. [0003] The synthesis of 2,6-diisopropylnaphthalene (2,6-DIPN) is generally based on naphthalene and propylene as raw materials, and the reaction products are monoisopropylnaphthalene (MIPN), dii...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C7/00C07C7/04C07C7/14C07C15/24
CPCC07C7/005C07C7/04C07C7/14C07C15/24
Inventor 陈亮宗弘元陈燕鑫郭艳姿
Owner CHINA PETROLEUM & CHEM CORP