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Preparation and application of Al-SBA-15 mesoporous molecular sieve and fatty alcohol ethoxylation reaction method

A fatty alcohol ethoxy, mesoporous molecular sieve technology, applied in molecular sieve catalysts, chemical instruments and methods, ether preparation and other directions, can solve the problems of weak acidity, limited application scope, etc., achieve large specific surface area, good catalytic activity, product The effect of narrow molecular weight distribution

Active Publication Date: 2018-06-22
JIANGSU SAILBOAT PETROCHEMICAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The unloaded SBA-15 is a pure silica zeolite material, and its acidity is weak, which limits its application range

Method used

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  • Preparation and application of Al-SBA-15 mesoporous molecular sieve and fatty alcohol ethoxylation reaction method
  • Preparation and application of Al-SBA-15 mesoporous molecular sieve and fatty alcohol ethoxylation reaction method
  • Preparation and application of Al-SBA-15 mesoporous molecular sieve and fatty alcohol ethoxylation reaction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: refer to figure 1 - image 3 , Al-SBA-15 mesoporous molecular sieve preparation method: Dissolve 4g P123 in 30g deionized water, add 120g 2mol•L-1HCl, stir at 38°C to obtain a transparent solution; then add 8.5g tetraethyl orthosilicate (TEOS) , according to n(Si):n(Al)= 30:1, add NaAlO 2 , stirred continuously at 38°C for 20 h; the mixed solution was transferred to a crystallization tank at 100°C for 2-3 days of crystallization, washed with deionized water, and dried in vacuum; -1 Rate-increased temperature calcination, stay at 540°C~560°C for 4h~6h; obtain Al-SBA-15 mesoporous molecular sieve.

Embodiment 2

[0028] Example 2: The reaction rate of Al-SBA-15 in the catalytic synthesis of n-octanol polyoxyethylene ether (determined by the reaction temperature).

[0029] Add 1mol (a certain amount) n-octanol, W (cat)%=7% (n-octanol) (the catalyst amount is 7% of n-octanol), when heated to 110°C, add 1mol ethylene oxide in batches, the initial pressure is 0.65 Mpa, at this time the ethylene oxide The alkanol reaction rate (moles of n-octanol reacted per mole of n-octanol per hour) is 3.2 mol.h -1 .

[0030] refer to Figure 4 ,from Figure 4 It can be seen that the temperature has a great influence on the reaction rate, and choosing an appropriate temperature is beneficial to the improvement of the product yield. At lower temperatures (below 100°C), the reaction between n-octanol and EO is very slow; the initial pressure is 0.65 MPa, and when the temperature is higher than 110°C, the reaction rate increases significantly with the increase of temperature, but As the temperature rises...

Embodiment 3

[0031] Example 3: The reaction rate of Al-SBA-15 in the catalytic synthesis of n-octanol polyoxyethylene ether (determined by the initial pressure).

[0032] Add 1mol n-octanol, W (cat)%=5~7% (n-octanol) (the catalyst amount is 5%~7% of n-octanol), the reaction temperature is 110°C~130°C, 1mol ethylene oxide is added in batches, and the initial pressure is 0.9 Mpa, the reaction rate of ethylene oxide is 4.2 mol.h -1 .

[0033] refer to Figure 5 ,from Figure 5 It can be seen that the initial pressure of the reaction system has a great influence on the reaction rate. As the system pressure increases, the reaction rate increases significantly. Because the reaction system pressure is too high, the reaction is too violent, and the reaction temperature rises too fast, which will lead to an increase in side reactions. . At the same time, the pressure of the reaction system is too high for the reactor. Therefore, the initial pressure of the reaction is selected to be 0.60-1.0 M...

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Abstract

The invention discloses a preparation method of an Al-SBA-15 mesoporous molecular sieve, application of the Al-SBA-15 mesoporous molecular sieve as a catalyst, and a method for catalyzing ethoxylationreactions of fatty alcohol. The fatty alcohol ethoxylation reaction method comprises the following steps: dispersing the Al-SBA-15 mesoporous molecular sieve into a certain amount of fatty alcohol, putting a dispersion liquid into a high-pressures kettle, performing nitrogen replacement, after the reaction temperature is 110-130 DEG C, adding ethylene oxide in batches, adding the ethylene oxide till the initial reaction pressure is 0.6-1.0 MPa each time, and cooling and discharging materials after reactions are completed. The Al-SBA-15 mesoporous molecular sieve catalyst prepared by using themethod has a relatively large specific surface area and an ordered microstructure, is good in catalysis activity, is narrow in catalyst product molecular weight distribution and can be repeatedly used.

Description

technical field [0001] The invention relates to a preparation method of an Al-SBA-15 mesoporous molecular sieve catalyst, and also relates to the application and method of the mesoporous molecular sieve catalyst in synthesizing fatty alcohol polyoxyethylene ether. Background technique [0002] Ethoxylation unit reaction catalysts are broadly classified into Lewis acid type, alkali metal type, alkaline earth metal type, multimetal type and other types. Alkali is traditionally used as a catalyst, such as NaOH, KOH, etc. However, it has been found in recent years that products with longer chain lengths and much narrower distribution can be obtained with weaker alkaline alkaline earth metal hydroxides and oxide catalysts than with strong bases. [0003] The earliest acid catalyst used in ethoxylation reaction was BF 3 、SbCI 5 、SnCI 4 . The products obtained by using acid catalysts have an ideal narrow molecular weight distribution, but the shortcomings of many by-products a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/04C07C41/03C07C43/11
CPCB01J29/041B01J2229/183C07C41/03C07C43/11
Inventor 安红宋伟明高树刚张千一赵耀
Owner JIANGSU SAILBOAT PETROCHEMICAL CO LTD
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