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Catalyst, preparation method and application used in the synthesis process of dimethyl isophthalate-5-sodium sulfonate

A technology of dimethyl isophthalate and isophthalic acid, which is applied in the field of compound catalysts loaded on HAP, can solve problems such as low yield of esterification products, long esterification reaction time, and potential safety hazards , to achieve the effect of good catalytic effect, simple preparation method and improved safety

Active Publication Date: 2022-03-11
SHANDONG FIRST MEDICAL UNIV & SHANDONG ACADEMY OF MEDICAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] (1) The esterification reaction takes a long time and requires a high temperature;
[0008] (2) The amount of methanol required for the esterification reaction is relatively large;
[0009] (3) The yield of esterification products is not high;
[0010] (4) Excessive oleum wastes resources and has potential safety hazards

Method used

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  • Catalyst, preparation method and application used in the synthesis process of dimethyl isophthalate-5-sodium sulfonate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment 1 A kind of catalyst used in the synthetic process of dimethyl isophthalate-5-sodium sulfonate and its preparation method

[0039] A catalyst used in the synthesis of dimethyl isophthalate-5-sodium sulfonate, the catalyst includes an active component and a carrier, the carrier is HAP (hydroxyapatite), and the active component is zinc acetate, DMAP ( 4-dimethylaminopyridine), ferrous bromide; further, the active ingredients include zinc acetate with a mass fraction of 21%, DMAP (4-dimethylaminopyridine) with a mass fraction of 42%, ferrous bromide with a mass fraction of 37% Iron; the mass ratio of active ingredient to carrier is 1:5.

[0040] The preparation method of the catalyst used in the synthetic process of dimethyl isophthalate-5-sodium sulfonate comprises:

[0041] (1) Introduce nitrogen

[0042] Nitrogen was first introduced into the reactor for 3 minutes, all the air in the reactor was replaced with nitrogen, and a slight positive pressure (gauge ...

Embodiment 2

[0055] Embodiment 2 A kind of catalyst used in the synthetic process of dimethyl isophthalate-5-sodium sulfonate and its preparation method

[0056] A catalyst used in the synthesis of dimethyl isophthalate-5-sodium sulfonate, the catalyst includes an active component and a carrier, the carrier is HAP (hydroxyapatite), and the active component is zinc acetate, DMAP ( 4-dimethylaminopyridine), ferrous bromide; further, the active ingredients include zinc acetate with a mass fraction of 21%, DMAP (4-dimethylaminopyridine) with a mass fraction of 42%, ferrous bromide with a mass fraction of 37% Iron; the mass ratio of active ingredient to carrier is 1:5.

[0057] The preparation method of the catalyst used in the synthetic process of dimethyl isophthalate-5-sodium sulfonate comprises:

[0058] (1) Introduce nitrogen

[0059] Nitrogen was first introduced into the reactor for 5 minutes, all the air in the reactor was replaced with nitrogen, and a slight positive pressure (gauge ...

Embodiment 3

[0072] Embodiment 3 A kind of catalyst used in the synthesis process of dimethyl isophthalate-5-sodium sulfonate and its preparation method

[0073] A catalyst used in the synthesis of dimethyl isophthalate-5-sodium sulfonate, the catalyst includes an active component and a carrier, the carrier is HAP (hydroxyapatite), and the active component is zinc acetate, DMAP ( 4-dimethylaminopyridine), ferrous bromide; further, the active ingredients include zinc acetate with a mass fraction of 32%, DMAP (4-dimethylaminopyridine) with a mass fraction of 55%, ferrous bromide with a mass fraction of 13% Iron; the mass ratio of active ingredient to carrier is 2.5:5.

[0074] The preparation method of the catalyst used in the synthetic process of dimethyl isophthalate-5-sodium sulfonate comprises:

[0075] (1) Introduce nitrogen

[0076] Nitrogen was first introduced into the reactor for 5 minutes, all the air in the reactor was replaced with nitrogen, and a slight positive pressure (gaug...

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Abstract

The invention provides a catalyst used in the synthesis of dimethyl isophthalate-5-sodium sulfonate, comprising zinc acetate, 4-dimethylaminopyridine (DMAP), ferrous bromide and hydroxyapatite ( HAP). The present invention also provides the preparation method of above-mentioned catalyst, and the application of above-mentioned catalyst in the synthetic process of dimethyl isophthalate-5-sodium sulfonate. The beneficial effects of the present invention are: the catalyst prepared by the present invention is easy to separate, has no secondary pollution, has high catalyst activity, good catalytic effect, and can be reused; the loading rate of each catalytic component is high; shortening of dimethyl isophthalate-5- The reaction time of the esterification reaction in the synthesis process of sodium sulfonate reduces the amount of methanol used and saves production costs.

Description

technical field [0001] The invention relates to a catalyst used in the synthesis process of dimethyl isophthalate-5-sodium sulfonate, in particular to a composite catalyst loaded on HAP. Background technique [0002] Dimethyl isophthalate-5-sodium sulfonate (SIPM) has the molecular formula C 10 h 9 o 2 SNa, can be used as organic intermediates, surfactants, etc. Mainly used in polyester, film, etc., among which polyester is the main application field, mainly as the third monomer of cationic modified polyester CDP. At present, the synthetic method of dimethyl isophthalate-5-sodium sulfonate is: take isophthalic acid as raw material, adopt excess SO 3 or oleum for sulfonation; then esterify the sulfonated product isophthalic acid-5-sulfonic acid with methanol; The solution is neutralized, and finally the finished product dimethyl isophthalate-5-sodium sulfonate is obtained through decolorization, impurity removal, crystallization and other steps. [0003] CN103992250A di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/04B01J31/02B01J27/18B01J31/26B01J27/128C07C303/06C07C303/22C07C303/32C07C309/58
CPCB01J31/04B01J31/0244B01J27/1806B01J31/26B01J27/128C07C303/06C07C303/22C07C303/32C07C309/58
Inventor 张恭孝赵玉宝崔萌孟宪锋付海涛郭祥荣郭彦恺
Owner SHANDONG FIRST MEDICAL UNIV & SHANDONG ACADEMY OF MEDICAL SCI
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