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Catalyst and method for preparing ethanol

A catalyst and ethanol technology, applied in the field of catalytic chemistry, can solve the problems of large consumption, low ethanol selectivity, and high requirements for reaction equipment

Active Publication Date: 2014-11-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] CN1974510A discloses a method for preparing alcohol from carboxylic acid and its ester. Precious metal ruthenium or palladium is immobilized on zirconium dioxide for the hydrogenation of methyl acetate to prepare ethanol. The conversion rate of methyl acetate is 80%. Low selectivity, only 68%
The method H 2 Large consumption, high requirements for reaction equipment

Method used

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  • Catalyst and method for preparing ethanol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Weigh 29 grams of pseudo-boehmite, 110 grams of γ-alumina, and 2.7 grams of scallop powder, mix them, add 1.4 grams of polyvinyl alcohol solution with a mass concentration of 5%, 1.4 grams of nitric acid, and 1.0 grams of magnesium nitrate dihydrate in an aqueous solution of 200 milliliter, extruded into a clover with a diameter of Ф2.5 mm, dried at 50°C for 24 hours and then calcined at 1000°C for 4 hours to obtain an alumina carrier A1 with a composite pore structure. Pre-soak the carrier with deionized water, then drain. Weigh 428 grams of copper nitrate and 1.14 grams of manganese nitrate tetrahydrate to make a 0.8M solution, and impregnate until the impregnating solution is colorless, drain, dry at 120°C for 4 hours, and roast at 450°C for 6 hours to obtain catalyst C1. The catalyst composition, specific surface area, pore volume, and pore distribution are shown in Table 1.

[0035]

Embodiment 2

[0037] Weigh 116 grams of pseudo-boehmite, 258 grams of γ-alumina, and 7.4 grams of asparagus powder, mix them, add 3.7 grams of polyvinyl alcohol solution with a mass concentration of 5%, 3.7 grams of nitric acid, and 500 grams of aqueous solution of 1.0 grams of calcium nitrate tetrahydrate. milliliter, extruded into a clover with a diameter of Ф2.5 mm, dried at 50°C for 24 hours and then calcined at 1000°C for 4 hours to obtain an alumina carrier A2 with a composite pore structure. Pre-soak the carrier with deionized water, then drain. Weigh 475.6 grams of copper nitrate and 22.9 grams of zinc nitrate hexahydrate to make a 0.8M solution, impregnate until the impregnation solution is colorless, drain, dry at 120°C for 4 hours, and roast at 450°C for 6 hours to obtain catalyst C2. The catalyst composition, specific surface area, pore volume, and pore distribution are shown in Table 1.

[0038]

Embodiment 3

[0040] Take by weighing 111.3 grams of pseudo-boehmite, 47.7 grams of gamma alumina, 4.8 grams of turnip powder, mix, add 3.2 grams of polyvinyl alcohol solution with a mass concentration of 5%, 3.5 grams of nitric acid, and 500 milliliters of an aqueous solution of 1.9 grams of barium nitrate, Extruded into a clover with a diameter of Ф2.5 mm, the wet strip was dried at 50°C for 24 hours and then calcined at 1000°C for 4 hours to obtain an alumina carrier A3 with a composite pore structure. Pre-impregnate the carrier with deionized water, then drain the water, weigh 114.1 grams of copper nitrate and 49.5 grams of nickel nitrate hexahydrate to prepare a 0.8M solution, and impregnate until the impregnating solution is colorless, drain, and dry at 120°C for 4 hours; 450 ℃ for 6 hours to prepare catalyst C3. The catalyst composition, specific surface area, pore volume, and pore distribution are shown in Table 1.

[0041]

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Abstract

The invention relates to a catalyst and a method for preparing ethanol, mainly aiming at solving the technical problem that an ester selective hydrogenation catalyst with good stability is difficult to prepare in the prior art. The catalyst for preparing ethanol contains the following components in parts by weight: (a) 5-50 parts of metallic copper or oxide of copper, (b) 0.05-30 parts of at least one element or oxide of the element from alkaline-earth metal or / and transition metal, and (c) 50-90 parts of an aluminum oxide carrier, wherein the specific surface area of the catalyst is 50-400m<2> / g, the total volume of pores is 0.3-2.0ml / g, the volume of pores with diameter smaller than 30 nanometers accounts for 5%-60% of total volume of pores, the volume of pores with diameter equal to 30-60 nanometers accounts for 20%-75% of total volume of pores, and the volume of pores with diameter greater than 60 nanometers accounts for 20%-60% of total volume of pores. By virtue of the technical scheme, the problems are well solved, and the catalyst can be used for industrial production of ethanol by hydrogenation of acetate.

Description

technical field [0001] The invention belongs to the field of catalytic chemistry, in particular to a method for preparing ethanol by hydrogenating acetate. Background technique [0002] Ethanol is widely used in food, medicine, chemical industry, fuel and other industries. At the same time, in the era of high oil prices, fuel substitution is one of the effective ways to ensure national energy security and reduce costs. As an important clean fuel and gasoline anti-knock agent component, ethanol can greatly reduce the emission of pollutants from combustion, which is of great significance to improving the environment and achieving sustainable development. [0003] Regarding the preparation technology of ethanol, the main methods currently used are grain fermentation method, ethylene hydration method, syngas synthesis of ethanol and acetate hydrogenation to prepare ethanol. According to statistics, more than 95% of factories in my country use grain fermentation to produce ethan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01J23/80B01J23/78B01J23/83C07C31/08C07C29/149
Inventor 刘仲能徐晓清江兴华涂云宝王燕波
Owner CHINA PETROLEUM & CHEM CORP
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