A kind of bifunctional organic composite solid acid and its preparation method
A composite, solid acid technology, used in organic compound/hydride/coordination complex catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as low catalytic efficiency, achieve improved catalytic performance, The effect of inhibiting the rehydration reaction
Active Publication Date: 2017-08-25
SUZHOU XIANGYUAN SPEICAL FINE CHEM
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Problems solved by technology
However, traditional composite materials are the summation and synergy of macro performance, which has certain limitations, and the development of nanotechnology has opened up new fields for the development of new composite materials.
[0003] Hydroxymethylfurfural (HMF), as an important biomass derivative, has been considered to produce fine chemicals. In the production process of HMF, polystyrene sulfonic acid is generally used alone as a catalyst, but its catalytic The efficiency is very low, so in a single aqueous phase, a product that is not only conducive to catalyzing the dehydration of fructose to generate HMF, but also conducive to inhibiting the occurrence of HMF rehydration reaction
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Embodiment 1
[0016] The invention proposes a bifunctional organic composite solid acid, which includes silica pellets as a carrier, and the silica pellets are grafted with polystyrene sulfonic acid.
[0017] The preparation method of the above-mentioned bifunctional organic composite solid acid comprises the following steps:
[0018] a. Preparation of silica pellets: Dissolve ammonia water and ethyl n-cinnamate in ethanol respectively, and stir at room temperature for 12 hours with a stirrer. The resulting solid particles are separated by a centrifuge, dispersed in ethanol again, and centrifuged. The following washing process adopts ethanol (twice)-water (twice)-ethanol (one time), and the solid obtained at last is dried at room temperature under a certain air flow rate;
[0019] b. The initiator is grafted on the surface of the silica sphere;
[0020] c. Polystyrene sulfonic acid is grafted on the surface of silica pellets through an initiator;
[0021] Preferably, the initiator is 4-ch...
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The present invention proposes a bifunctional organic composite solid acid and a preparation method thereof, comprising silica pellets as a carrier, and the silica pellets are grafted with polystyrene sulfonic acid, in a single aqueous phase, both It is beneficial to catalyze the dehydration of fructose to generate HMF, and it is also beneficial to inhibit the occurrence of HMF rehydration reaction. Compared with polystyrene sulfonic acid PSSH, the catalytic performance is significantly improved, and the yield of HMF reaches 40%.
Description
technical field [0001] The invention relates to the field of nanocomposite materials, in particular to a bifunctional organic composite solid acid. Background technique [0002] Composite material technology is composed of two or more materials with different properties, through physical or chemical methods, compounded into materials with multiple functions from the molecular level. Since various materials learn from each other in performance and produce synergistic effects, the comprehensive performance of the obtained composite material is better than that of the original constituent materials, so that it can meet various requirements. However, traditional composite materials are the summation and synergy of macroscopic properties, which have certain limitations, and the development of nanotechnology has opened up new fields for the development of new composite materials. [0003] Hydroxymethylfurfural (HMF), as an important biomass derivative, has been considered to prod...
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IPC IPC(8): B01J31/06
Inventor 周建颜玉荣
Owner SUZHOU XIANGYUAN SPEICAL FINE CHEM