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Catalyst for producing ethanol by hydrogenation of acetic ester, and preparation method thereof

A technology for hydrogenation of acetate and catalyst, which is applied in chemical instruments and methods, preparation of hydroxyl compounds, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of high price, unfavorable industrial production, and high cost, and achieve Low price, reduced production energy consumption and investment in fixed equipment, less reaction by-products

Active Publication Date: 2013-06-19
SOUTHWEST RES & DESIGN INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, lanthanide metals or actinide metals are expensive and costly, which is not conducive to industrial production

Method used

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  • Catalyst for producing ethanol by hydrogenation of acetic ester, and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Weigh 2 parts of 100g silica sol carrier, one part is modified (recorded as SiO 2 (C)), one unmodified (denoted as SiO 2 (W)), configure the catalyst with 15wt% Cu and 5wt% Ag content based on the weight of the carrier, the steps are as follows: select copper nitrate, silver nitrate, and prepare an impregnating solution according to the Cu and Ag loading, in order to prevent the hydrolysis of metal ions to produce hydroxide Precipitation of substances or oxides, add a small amount of nitric acid to the impregnating solution to make the pH of the impregnating solution about 5~6, and then prepare the SiO 2 After the carrier was immersed in the solution for 24 hours, it was vacuum-dried for 6 hours, calcined at 650°C for 6 hours, and then reduced at 450°C for 6 hours with a flow rate of 400mL / min and a mixture of nitrogen and hydrogen containing 20% ​​hydrogen. Cu-Ag / SiO 2 catalyst. Respectively denoted as Cu-Ag / SiO 2 (C) and Cu-Ag / SiO 2 (W).

Embodiment 2

[0043] Take by weighing 2 parts of 100g modified silica sol carrier, configure the catalyst with 20wt% Cu and 6wt% Ag content by carrier weight, the steps are as follows: select cupric chloride, silver nitrate, prepare impregnating solution according to Cu and Ag load capacity, for To prevent the hydrolysis of metal ions to produce hydroxide or oxide precipitation, a small amount of nitric acid is added to the impregnating solution to make the pH of the impregnating solution about 6.5, and then the prepared modified SiO 2 After the carrier is immersed in the solution for 10 hours, it is fully absorbed and dried into a solid in a water bath, and then the solid is dried at 120°C for 6 hours, and roasted at 500°C for 6 hours, and then the flow rate of 200mL / min contains hydrogen to 20 % nitrogen and hydrogen mixed gas, reduced at 600 ° C for 2 hours, then made into Cu-Ag / SiO 2 catalyst. Respectively denoted as Cu-Ag / SiO 2 (H) and Cu-Ag / SiO 2 (M).

Embodiment 3

[0045] Weigh 2 parts of alumina 100g carrier, one part is modified (denoted as Al 2 o 3 (J)), one unmodified (denoted as Al 2 o 3 (L)), configure the catalyst with 15wt% Cu and 5wt% Ag content based on the weight of the carrier, the steps are as follows: select copper nitrate, silver nitrate, and prepare an impregnating solution according to the Cu and Ag loads, in order to prevent the hydrolysis of metal ions to produce hydroxide Precipitation of substances or oxides, adding a small amount of nitric acid to the impregnating solution to make the pH of the impregnating solution about 5~6, and then the prepared modified Al 2 o 3 The carrier was soaked in the solution for 24 hours, dried in vacuum for 4 hours, calcined at 650°C for 4 hours, and then reduced at 450°C for 6 hours with a flow rate of 300mL / min and 20% hydrogen containing nitrogen and hydrogen gas to prepare into Cu-Ag / Al 2 o 3 catalyst. Respectively denoted as Cu-Ag / Al 2 o 3 (J) and Cu-Ag / Al 2 o 3 (L). ...

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Abstract

An object of the invention is to provide a catalyst for producing ethanol by hydrogenation of acetic ester by using copper metal or copper oxide or a mixture of the above two as a main active component, silver as a co-catalyst and alumina or silica sol as a carrier, and a preparation method and an application thereof. The catalyst is environment-friendly, is more suitable for industrialized production, has high reactivity and high selectivity at a relatively low temperature and pressure, and is beneficial for reducing raw material consumption in the industrialized production and increasing technical economy. Besides, the catalyst has good stability and long catalytic life.

Description

technical field [0001] The invention belongs to catalysts, in particular to a catalyst for hydrogenation of acetate to produce ethanol and a preparation method thereof. Background technique [0002] Ethanol, commonly known as alcohol, is a flammable and volatile colorless transparent liquid at normal temperature and pressure. Ethanol has a wide range of uses. Ethanol can be used to make beverages, essences, dyes, fuels, etc. Ethanol with a volume fraction of 70%-75% is also commonly used as a disinfectant in medical treatment. Ethanol is an important clean energy. It can not only replace tetraethyl lead as an anti-knock agent for gasoline, but also produce ethanol gasoline as a vehicle fuel, which greatly reduces the environmental pollution caused by gasoline combustion. [0003] The production technology of ethanol mainly adopts chemical synthesis methods such as grain fermentation and ethylene hydration. [1] . The production of ethanol by fermentation is m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89C07C31/08C07C29/149
Inventor 范鑫王科李扬胡玉蓉袁小金许红云
Owner SOUTHWEST RES & DESIGN INST OF CHEM IND
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