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Selective hydrogenation catalyst, preparation method and catalyzing evaluation method on generation of isobutyraldehyde by the selective hydrogenation catalyst

A technology of hydrogenation catalyst and evaluation method, which is applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalyst, carbon-based compound preparation, etc. , the effect of mild reaction conditions, low temperature and pressure

Inactive Publication Date: 2017-07-07
WUHAN KAIDI ENG TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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But the lifetime of the catalyst does not provide

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  • Selective hydrogenation catalyst, preparation method and catalyzing evaluation method on generation of isobutyraldehyde by the selective hydrogenation catalyst
  • Selective hydrogenation catalyst, preparation method and catalyzing evaluation method on generation of isobutyraldehyde by the selective hydrogenation catalyst
  • Selective hydrogenation catalyst, preparation method and catalyzing evaluation method on generation of isobutyraldehyde by the selective hydrogenation catalyst

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preparation example Construction

[0031] A kind of preparation method of above-mentioned selective hydrogenation catalyst, it comprises the steps:

[0032] Step 1: Weigh a part of the carrier in a beaker, weigh another part of the carrier as a carrier for impregnation, and pour deionized water into the beaker under stirring conditions until the carrier in the beaker is just saturated, and record the consumption of deionized The volume of water obtains the water absorption of the unit mass carrier, i.e. the saturated water absorption W of the carrier is in mL / g;

[0033] Step 2: Dissolve the noble metal precursor in water, dissolve under heating conditions, and mark it as solution A;

[0034] Step 3: Dissolve the non-noble metal precursor in water, marked as solution B;

[0035] Step 4: Mix solution A and solution B evenly, dilute and set aside, and mark it as impregnating solution C. The volume of impregnating solution C is equal to the weight of the impregnating carrier multiplied by the saturated water abso...

Embodiment 1

[0054] Selective Hydrogenation Catalyst 4% Ir-MoO 3 / SiO 2 (0.9) is prepared as:

[0055] Step 1: Put 0.286g of purchased precipitated silica in a beaker, drop in deionized water until the carrier is saturated, record the volume of consumed water as 2.6mL, that is, the saturated water absorption W of the carrier is 9.1mL / g;

[0056] Step 2: Take 0.022g iridium trichloride hydrate, dissolve it in 1.0mL water, heat at 50°C for 0.5 hour to form a transparent red solution, which is marked as solution A;

[0057] Step 3: Take 0.01g of ammonium paramolybdate, dissolve it in 0.5mL of water, and mark it as solution B;

[0058] Step 4: Mix solution A and solution B evenly to form an impregnating solution, add water to dilute to 2.6mL, and mark it as impregnating solution C. The molar concentration of noble metal atoms in impregnating solution C is 0.024mol / L, and the molar concentration of non-noble metal atoms is 0.022 mol / L;

[0059] Step 5: Take another 0.286g of precipitated si...

Embodiment 2

[0062] Selective Hydrogenation Catalyst 4% Ir-MoO 3 / SiO 2 (2) is prepared as:

[0063] Step 1: Put 0.286g of purchased precipitated silica in a beaker, drop in deionized water until the carrier is just absorbed and saturated, record the volume of consumed water as 2.6mL, that is, the saturated water absorption W of the carrier is 9.1mL / g ;

[0064] Step 2: Take 0.022g iridium trichloride hydrate, dissolve it in 1.0mL water, heat at 50°C for 0.5 hour to form a transparent red solution, which is marked as solution A;

[0065] Step 3: Take 0.022g of ammonium paramolybdate, dissolve it in 0.5mL of water, and mark it as solution B;

[0066] Step 4: Mix solution A and solution B evenly, add water to dilute to 2.6mL, and form an impregnation solution, which is marked as impregnation solution C. The molar concentration of noble metal atoms in impregnation solution C is 0.024mol / L, and the molar concentration of non-noble metal atoms is 0.048mol / L;

[0067] Step 5: Take another 0...

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Abstract

The invention relates to a selective hydrogenation catalyst, a preparation method and a catalyzing evaluation method for isobutyraldehyde by the selective hydrogenation catalyst. The selective hydrogenation catalyst comprises a carrier and active components, wherein the active components include a noble metal material and a non-noble metal material; the carrier is selected from one of fumed silica, precipitated silicon dioxide, aluminum oxide, carbon nitride and titanium dioxide; the noble metal material is noble metal, namely Ir (iridium); the non-noble metal material is selected from one of non-noble metals, namely Mo (molybdenum), W (tungsten), Ni (nickel), Co (cobalt), Sm (samarium), Ce (cerium) and Re (rhenium); the atom ratio of non-noble metal material to noble metal material is 0.8 to 5. The selective hydrogenation catalyst has the advantage that the methylacrolein can be selectively hydrogenated to generate the isobutyraldehyde in environment-friendly green solvent water under the milder reaction condition.

Description

technical field [0001] The invention relates to the technical field of catalytic hydrogenation, in particular to a selective hydrogenation catalyst, a preparation method and a catalytic evaluation method for generating isobutyraldehyde. Background technique [0002] In industrial production, isobutyraldehyde is mainly obtained from the carbonylation reaction of propylene. It is generally a by-product of the carbonylation of propylene to butanol and octanol in large-scale ethylene complexes. Usually, a set of 300,000 tons / year ethylene plant produces isobutyraldehyde by-product every year. About 10,000 tons. However, with the development of propylene carbonylation to the low-pressure method (rhodium catalyst method), the normal isomerization ratio in the crude carbonylation liquid has risen to more than 10:1, resulting in a decreasing source of isobutyraldehyde, unable to meet the strong demand of downstream products. Therefore, it is imminent to develop a new synthetic rout...

Claims

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Application Information

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IPC IPC(8): B01J23/652C07C45/62C07C47/02
CPCB01J23/002B01J23/6525C07C45/62Y02P20/584C07C47/02
Inventor 张然许莉明卫星王杰华杨伟光朱吟昊
Owner WUHAN KAIDI ENG TECH RES INST CO LTD
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