Mg/Al/X ternary composite metal oxide catalyst and preparation method thereof

A ternary composite, catalyst technology, applied in metal/metal oxide/metal hydroxide catalysts, catalyst activation/preparation, physical/chemical process catalysts, etc., can solve problems such as inability to meet the requirements and the performance of polyether products needs to be improved.

Inactive Publication Date: 2009-10-21
TIANJIN POLYTECHNIC UNIV
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  • Description
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Problems solved by technology

After the 1980s, my country has successively introduced advanced polyether production technology and equipment from companies such as Italian PRESS, Japan Mitsui and American DOW, but still cannot meet certain special requirements in terms of narrow molecular weight distribution polyether products; at the same time, there are still quite a few Polyether product companies still use traditional technology, and the performance of polyether products needs to be improved

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  • Mg/Al/X ternary composite metal oxide catalyst and preparation method thereof
  • Mg/Al/X ternary composite metal oxide catalyst and preparation method thereof

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[0019] The catalyst preparation method designed at the same time in the present invention includes precursor preparation, crystallization, secondary crystallization, molding and calcination processes in sequence, mainly adopting the co-precipitation method to drop Mg at the same time 2+ 、Al 3+ And the third element metal ion, and then through the preparation process of molding and calcination, the catalyst product of the present invention is obtained. Catalyst preparation method of the present invention comprises following specific technique:

[0020] 1. Preparation of precursors. The preparation concentration is the NaOH aqueous solution (solution A) of 1-5mol / L and the NaOH of 2-10mol / L 2 CO 3 Aqueous solution (solution B); preparation containing 0.1-10mol / L Mg 2+ Aqueous solution (solution C); preparation containing 0.1-10mol / L Al 3+ the aqueous solution (solution D); prepare the aqueous solution (solution E) of the tertiary metal ion of 0.05-2mol / L; Add it dropwise i...

Embodiment 1

[0036] Preparation. Mg / Al / Dy ternary composite metal oxide catalyst.

[0037] 1. Pre-body preparation. Preparation concentration is the NaOH aqueous solution (solution A) of 1.3mol / L and the NaOH of 3.6mol / L 2 CO 3 Aqueous solution (solution B); preparation containing 1mol / L Mg(NO 3 ) 2 Aqueous solution (solution C); preparation containing 1mol / L AlCl 3 aqueous solution (solution D); prepare 0.5mol / L of Dy(NO 3 ) 3 Aqueous solution (solution E); after preparing the above solution, simultaneously add solutions C, D, and E dropwise at a rate of 0.5ml / min to a beaker containing a mixture of 200ml solution A and 300ml solution B, and the pH is 12.0 ; where Mg in solution C, solution D and solution E 2+ :Al 3+ : Dy 3+ The molar ratio is 0.1:1:0.1, the volume ratio of solution A and solution B in the beaker is 1:10; the reaction temperature is controlled at 40°C, and the reaction is stirred for 800 minutes to obtain the Mg / Al / Dy ternary composite metal oxide precursor slur...

Embodiment 2

[0042] Preparation of Mg / Al / Ce ternary composite metal oxide catalyst.

[0043] 1. Preparation of precursors. The preparation concentration is the NaOH aqueous solution (solution A) of 1.0mol / L and the NaOH of 2.0mol / L 2 CO 3 Aqueous solution (solution B); preparation containing 1mol / L Mg(NO 3 ) 2 Aqueous solution (solution C); preparation containing 3mol / L AlCl 3 aqueous solution (solution D); prepare 0.6mol / L of Ce(NO 3 ) 3 Aqueous solution (solution E); after preparing the above solution, add solutions C, D, and E dropwise at a speed of 8.0ml / min to the beaker containing the mixture of 200ml solution A and 300ml solution B, and control the pH at 9.0 ; Wherein solution C, solution D, solution E in Mg 2+ :Al 3+ : Ce 3+ The molar ratio is controlled at 1:3:0.6, the volume ratio of solution A and solution B in the beaker is controlled at 1:10; the reaction temperature is controlled at 40°C, and the reaction is stirred for 120 minutes to obtain the Mg / Al / Ce ternary comp...

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Abstract

The invention relates to an Mg/Al/X ternary composite metal oxide catalyst and a preparation method thereof. The catalyst is characterized in that the catalyst consists of magnesium, aluminum and ternary metal elements, and the surface of a catalyst product is distributed with an aperture of which diameter is 1 to 20mu m and a protrusion of which height is 0.1 to 10mu m; and the ternary metal elements contain Ce, Dy, Fe, Mn, Co, Cd, Zn or Ni soluble salt comprising nitrate, hydrochloride, sulfate, phosphate or perchlorate. The preparation method for the catalyst comprises the following processes in turn: precursor preparation, crystallization, secondary crystallization, molding and calcination. The catalyst is applicable to the production process of the conventional kettle-type or intermittent polyether product, has good narrow molecular-weight distribution effect for the synthesis of the polyether product, has high catalytic rate, and can be recycled.

Description

technical field [0001] The invention relates to catalyst technology, in particular to a Mg / Al / X ternary composite metal oxide catalyst used in the synthesis of a narrow molecular weight distribution nonionic surfactant and a preparation method thereof. Background technique [0002] In the field of surfactants, nonionic surfactants (usually referred to as polyethers) synthesized with fatty alcohols as initiators and ethylene oxide, propylene oxide or their mixtures as chain extenders (usually referred to as polyethers) have been used more and more in recent years. An increasingly wide range of fine chemical products. The molecular weight distribution of polyether products has a great influence on its application performance. For example, polyether products with narrow molecular weight distribution (narrow distribution) have many incomparable advantages of traditional polyether products: [0003] 1. The target product has high content, good appearance and low odor. [0004] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/10B01J23/745B01J23/34B01J23/75B01J23/06B01J23/755B01J35/10B01J37/00B01J37/03C07C43/11C07C41/01C07C41/02
Inventor 许世超张纪梅
Owner TIANJIN POLYTECHNIC UNIV
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