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Catalyst for synthesis of propionic acid with ethyl alcohol carbonylation method
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A catalyst, carbonylation technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problem of low yield of product propionic acid or ethyl propionate, etc. problem, to achieve the effect of improving the catalytic effect
Active Publication Date: 2010-09-29
ABA CHEM CORP
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Problems solved by technology
[0003] The Chinese invention patent application with the application number 200510027917.1 discloses a preparation method of a catalyst for synthesizing propionic acid by ethanol carbonylation. The catalyst involved is a supported binary non-noble metal catalyst. Raw material conversion rate, and due to the use of non-noble metals, the cost is low, but the catalyst is used in the carbonylation of ethanol, and the yield of the product propionic acid or ethyl propionate is low (34-62%)
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Embodiment 1
[0011] Example 1 A catalyst for synthesizing propionic acid by carbonylation of ethanol, consisting of 7.5% nickel, 2% copper, 2% lead and 88.5% activated carbon.
[0012] The catalyst is prepared by the following method:
[0013] (1), pretreatment: take by weighing 50 grams of commercial activated carbon (coconut husks), boil in 250ml deionized water for 4 hours, then dry at 120°C for 12 hours, and then reflux in a 2% nitric acid solution Boil for 3 hours, then dry at 120°C for 12 hours.
[0014] (2) Nickel / activated carbon (Ni / AC) with a nickel loading of 7.5% obtained by impregnation: the pretreated activated carbon (AC) is placed in a water bath at 50°C and vacuumed to eliminate its adsorption The gas reduces the penetration time of the metal solution. Immediately put the activated carbon after vacuuming into the nickel nitrate solution with a mass concentration of 5.6% for immersion for 24 hours, then filter off the excess solution, dry at 80°C for 6 hours, and then dry...
Embodiment 2
[0019] According to the ethanol carbonylation method of the present embodiment, the catalyst for synthesizing propionic acid is composed of: 7.5% nickel, 2% copper, 2% zinc and 88.5% activated carbon (7.5%Ni-2%Cu-2%Zn / AC).
[0020] The preparation of 7.5%Ni-2%Cu-2%Zn / AC is the same as in Example 1.
[0021] 7.5%Ni-2%Cu-2%Zn / AC is applied to the synthesis of propionic acid, the reaction conditions are the same as in Example 1, the ethanol conversion rate obtained is 99.8%, and the total yield of propionic acid and ethyl propionate is 70% .
Embodiment 3
[0023] According to the catalyst composition of the present embodiment: 5%Ni-2%Cu-2%Pb / AC, when it is applied to prepare propionic acid, the conversion rate of ethanol is 98.8%, the total yield of propionic acid and ethyl propionate The rate is 66%.
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Abstract
The invention relates to a catalyst for synthesizing propionic acid by an ethanol carbonylation method, which is a ternary composite catalyst loaded on activated carbon and consists of 1 to 20 percent of nickel, 1 to 10 percent of copper, 1 to 10 percent of a third metal M, and the balance being the activated carbon, wherein the third metal M is one of iron, lead, tin, lanthanum and palladium. The catalytic effect of the catalyst is good; and when the catalyst is used for synthesizing the propionic acid, the raw material conversion rate is high, and the yield is high.
Description
technical field [0001] The present invention relates to catalysts used in a process for the production of propionic acid by carbonylation of ethanol. Background technique [0002] Carbonylation of ethanol is one of the important methods for preparing propionic acid, in which catalyst plays a key role. [0003] The Chinese invention patent application with the application number 200510027917.1 discloses a preparation method of a catalyst for synthesizing propionic acid by ethanol carbonylation. The catalyst involved is a supported binary non-noble metal catalyst. Raw material conversion rate, and due to the use of non-noble metals, the cost is low, but the catalyst is used in the carbonylation of ethanol, and the yield of the product propionic acid or ethyl propionate is low (34-62%) Contents of the invention [0004] The technical problem to be solved by the present invention is to provide a catalyst for synthesizing propionic acid by ethanol carbonylation, which has a go...
Claims
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