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A kind of α,α-dimethylbenzyl alcohol hydrogenolysis catalyst and preparation method thereof

A technology of dimethylbenzyl alcohol and catalyst, applied in the field of catalysis, can solve problems such as insufficient stability, and achieve the effects of inhibiting the growth of crystal grains, improving the degree of dispersion, and enhancing the activity of the catalyst

Active Publication Date: 2022-07-12
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the Cu-Zn system has good hydrogenation activity, the activity of the Cu-Zn solid solution provided by the calcination temperature of 350 ° C will gradually transform with the increase of the reaction temperature, resulting in insufficient stability.

Method used

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  • A kind of α,α-dimethylbenzyl alcohol hydrogenolysis catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] Dissolve 10.15g of niobium pentachloride in 11.3g of isopropanol, add it to 120g of aluminum isopropoxide after complete dissolution, use a high-frequency plasma generator at room temperature, and a radio frequency of 15MHz. The discharge parameters are voltage 100V, positive current (100±10) mA, grid current (50±10) mA, and processing vacuum degree 2Pa. The hydrolysis time was 2h.

[0083] Continue to use the plasma reactor to treat the reaction system to completely decompose the isopropanol, and the COD in the waste water is less than 50ppm. The carrier a was obtained by filtration, drying and calcination at 800 °C for 6 h.

[0084] 0.68L of water was added to the precipitation kettle, 151g of copper nitrate and 20.59g of 50% manganese nitrate aqueous solution were mixed uniformly, and then added to the reactor with 15wt% sodium carbonate solution to obtain precursor b. The temperature of the precipitation process was controlled at 75°C, the precipitation time was 1...

Embodiment 2

[0089] Dissolve 16.24 g of niobium pentachloride in 18.0 g of isopropanol, add it to 160 g of aluminum isopropoxide after complete dissolution, heat to 40° C., high-frequency plasma generator, radio frequency 14 MHz. The discharge parameters are voltage 100V, positive current (100±10)mA, grid current (50±10)mA, and processing vacuum degree 50Pa. The hydrolysis time was 1.5h.

[0090] Continue to use the plasma reactor to treat the reaction system to completely decompose the isopropanol, and the COD in the waste water is less than 50ppm. Carrier a was obtained by filtration, drying and calcination at 900 °C for 6 h.

[0091] 0.62L of water was added into the precipitation kettle, 136g of copper nitrate and 20.59g of 50% manganese nitrate aqueous solution were mixed uniformly and then added to the reactor with 15wt% sodium carbonate solution to obtain precursor b. The temperature of the precipitation process was controlled at 65°C, the precipitation time was 1.5h, the precipit...

Embodiment 3

[0096] Dissolve 16.24 g of niobium pentachloride in 18.0 g of isopropanol, add it to 160 g of aluminum isopropoxide after complete dissolution, heat to 40° C., high-frequency plasma generator, radio frequency 14 MHz. The discharge parameters are voltage 100V, positive current (100±10)mA, grid current (50±10)mA, and processing vacuum degree 50Pa. The hydrolysis time was 1.5h.

[0097] Continue to use the plasma reactor to treat the reaction system to completely decompose the isopropanol, and the COD in the waste water is less than 50ppm. Carrier a was obtained by filtration, drying and calcination at 900 °C for 6 h.

[0098] 0.58L of water was added to the precipitation kettle, 136g of copper nitrate and 8.23g of 50% manganese nitrate aqueous solution were mixed uniformly, and then added to the reactor with 15wt% sodium carbonate solution to obtain precursor b. The temperature of the precipitation process was controlled at 65°C, the precipitation time was 1.5h, the precipitat...

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Abstract

The invention relates to a preparation method of a catalyst for preparing cumene by hydrogenolysis of α,α-dimethylbenzyl alcohol. Preparation of Nb-Al compounds by double hydrolysis to form AlNbO 4 Structure, the plasma generator promotes the dehydration of isopropanol to slowly release water, which can control the rate of hydrolysis. The Cu-based catalyst involved in the present invention is composed of: CuO content of 30-60%, MnOx content of 2-10%, alkali metal compound auxiliary content of 1-10%, NbOx content of 5-20%, Al content 2 O 3 Content 30‑60%. The catalyst prepared by this method can solve the problem of serious pollution of the existing Cu-Cr catalyst, and can further improve the hydrogenolysis activity of the catalyst.

Description

technical field [0001] The invention belongs to the field of catalysis, and in particular relates to an α,α-dimethylbenzyl alcohol hydrogenolysis catalyst and a preparation method thereof. Background technique [0002] Propylene oxide (PO) is an important organic chemical raw material, and its output is second only to polypropylene in propylene derivatives. Propylene oxide is mainly used in the production of polyether polyol, propylene glycol and various nonionic surfactants, among which polyether polyol is an important raw material for the production of polyurethane foam, thermal insulation materials, elastomers, adhesives and coatings, etc. Ionic surfactants are widely used in petroleum, chemical, pesticide, textile, daily chemical and other industries. At the same time, propylene oxide is also an important basic chemical raw material. [0003] α,α-dimethylbenzyl alcohol (α-Cumyl Alcohol, CA) is a white prismatic crystal with rose aroma, insoluble in water, soluble in et...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/20B01J23/889B01J37/34C07C1/20C07C15/085C02F1/30C02F101/34
CPCB01J23/8892B01J37/349B01J23/20C07C1/20C02F1/30C02F2101/34C07C15/085Y02P20/584
Inventor 詹吉山沙宇李作金燕宸于海波孙康初乃波黎源张昊
Owner WANHUA CHEM GRP CO LTD
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