Catalyst for preparing C4-C8 higher alcohols by ethanol conversion and its preparation method and application

A high-carbon alcohol and catalyst technology, applied in the direction of physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, can solve the problem of affecting the continuous production of butanol and affecting the selectivity of butanol and other problems, to achieve good economy and practicability, easy control of components, and stable structure

Active Publication Date: 2021-04-02
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Similarly, the oxide carrier is easily converted into aluminum hydroxy or hydrate under hydrothermal conditions (the product contains water), which seriously affects the subsequent continuous preparation of butanol
Patent literature (CN106622283A) and patent literature (CN 106955690 A) point out that a large amount of ethyl acetate is produced on the magnesium oxide-based catalyst, which seriously affects the selectivity of butanol

Method used

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  • Catalyst for preparing C4-C8 higher alcohols by ethanol conversion and its preparation method and application
  • Catalyst for preparing C4-C8 higher alcohols by ethanol conversion and its preparation method and application
  • Catalyst for preparing C4-C8 higher alcohols by ethanol conversion and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Pt-LaO 2 Preparation of / CMK-3 catalyst:

[0048] The acid treatment of CMK-3 is the same as in Comparative Example 1.

[0049] Weighed 0.47g of lanthanum nitrate, dissolved in 10mL of deionized water, added 1g of CMK-3 into the above salt solution under stirring, immersed for 6 hours, dried by rotary evaporation, and roasted at 300°C for 2 hours under nitrogen atmosphere. Dissolve 1 ml of 2% Pt chloride or nitrate solution in 20 ml of water (acid can be added to prevent precipitation), and LaO 2 / CMK-3 was added to the above solution, stirred well, then added ammonia solution to adjust the pH to 10, aged for 2 hours, filtered and dried. After drying, the sample was reduced by hydrazine hydrate for 2h to obtain the final 2%Pt-15%LaO 2 / CMK-3 catalyst.

Embodiment 2

[0051] RuNi-PrO 2 Preparation of / MC catalyst:

[0052] The pretreatment condition of MC is the same as that of Comparative Example 1, and the oxygen content of MC after treatment is 1.6%.

[0053] Weighed 0.49g of praseodymium nitrate, 0.1g of nickel nitrate and 1ml of 2% ruthenium chloride solution were dissolved in 10mL of deionized water. Add 1g of mesoporous carbon MC into the above salt solution under stirring, stir for 4 hours, let stand overnight, dry at 120°C for 5 hours, and reduce at 350°C for 1 hour under a hydrogen atmosphere to finally obtain 2%Ru2%Ni-20%PrO x / MC Catalyst.

Embodiment 3

[0055] IrCu-LaO 2 Preparation of / CMK-3 catalyst:

[0056] The acid treatment of CMK-3 is the same as in Comparative Example 1.

[0057] Firstly, LaO was prepared by impregnation method 2 / CMK-3 catalyst, and then adopt the adsorption method to prepare the supported IrCu catalyst, the specific process is: weighed 0.47g lanthanum nitrate, dissolve it in 10mL deionized water, add 1g CMK-3 in the above-mentioned salt solution under stirring, impregnate 6 hours, dry by rotary evaporation, and bake at 300° C. for 2 hours under nitrogen atmosphere. Dissolve 2 milliliters of 0.5% Ir chloride solution in 20 mL water and 0.1 g nickel nitrate (acid can be added to prevent precipitation), and LaO 2 / CMK-3 was added to the above solution, stirred thoroughly for 5 hours, and dried by filtration. After drying, the sample was reduced by ethylene glycol at 200°C for 4 hours to obtain the final 1%Ir2%Ni-15%LaO 2 / CMK-3 catalyst.

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Abstract

The invention provides a catalyst for preparing C4-C8 higher alcohol through ethanol conversion as well as a preparation method and application of the catalyst. The catalyst comprises a carrier, an active component A and an active component B. The active component A comprises at least one noble metal, and the active component B is at least one lanthanide metal. The catalyst is used for stirring reaction in a reaction kettle or reaction on a fixed bed; the reaction atmosphere is one or more than two of nitrogen, helium, argon and hydrogen, and the reaction temperature is greater than or equal to 120 DEG C. The raw material adopted is bioethanol, and has the advantages of abundant reserves, environmental friendliness, greenness, no pollution and the like, and the produced higher alcohols mainly comprise butanol, hexanol and octanol, and have the advantages of high economy, wide utilization way and the like. In addition, the catalyst is simple to prepare in the process, the reaction process is easy to operate, the reaction selectivity is high, the stability is good, the product is easy to separate, and important economic value and potential industrial prospect are achieved.

Description

technical field [0001] The invention belongs to the technical field of bioenergy chemical industry, and relates to a catalyst for preparing C4-C8 higher alcohols by catalytic conversion of ethanol, a preparation method and application thereof. Background technique [0002] With the depletion of fossil fuels, the aggravation of environmental pollution and the rapid development of fermentation technology, ethanol as a new energy chemical platform compound has attracted widespread attention. By 2010, ethanol production exceeded 60 billion liters. At present, most of ethanol is mainly used for adding oil products, thereby partially replacing fuel oil. However, based on the limitation of safety and solvent compatibility, the amount of ethanol added in oil is limited, only less than 20%, which seriously restricts the development and application of ethanol. [0003] Correspondingly, butanol and C 4+ High-carbon alcohols such as high-carbon alcohols have a higher addition ratio, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/63C07C29/34C07C31/12C07C31/125
CPCB01J23/63C07C29/34C07C31/12C07C31/125
Inventor 庞纪峰王祉诺郑明远张涛
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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