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Catalyst for highly selective conversion of synthesis gas to acetic acid and its application

A high-selectivity, synthesis gas technology, used in physical/chemical process catalysts, carbon monoxide reaction to prepare carboxylic acid, molecular sieve catalysts, etc., can solve the problem of high price, achieve low price, good reaction performance, and promote the effect of selective transformation

Active Publication Date: 2021-03-30
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at present, most of the reported catalysts for producing acetic acid from syngas are based on Rh-based catalysts (J.Catal., 1998, 180, 194; Catal. Today., 2000, 63, 453; Catal. Commun., 2006, 7, 559), but the raw material Rh The price is expensive, and the conversion rate of CO is <1%, the selectivity of acetic acid is about 60%, and the performance needs to be greatly improved

Method used

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  • Catalyst for highly selective conversion of synthesis gas to acetic acid and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh 1.0g Zn(NO 3 ) 2 ·6H 2 O was added to 100mL water and stirred at 30°C for 6h; then 25.0g Zr(NO 3 ) 4 ·5H 2 O and 20.0g triethanolamine, stirred for 5h, transferred to a hydrothermal kettle, and hydrothermally treated at 180°C for 12h; the obtained solid was suction filtered, washed until neutral, dried overnight at 120°C, and then the sample was placed in a muffle furnace Raise the temperature at a rate of 5°C / min to 500°C and roast for 6 hours, the product obtained is a zirconium-based solid solution oxide, which is recorded as 3% ZnO-ZrO 2 .

[0026] Take by weighing 2.0g H-MOR molecular sieves and put in fixed-bed reactor and pass through 2% pyridine / N 2 Mixed gas, heated to 300°C at a rate of 5°C / min for 24 hours, and then the sample treated with pyridine was treated with 0.05M NaNO 3 The aqueous solution was treated at 80°C for 2h, and the obtained solid was heated to 500°C in a muffle furnace at a rate of 5°C / min and roasted for 5h, and then the sampl...

Embodiment 2

[0030] Weigh 0.7g AlCl 3 Add 100mL of water, stir at 30°C for 3h; then add 25.0g of Zr(NO 3 ) 4 ·5H 2 O and 20.0g disodium ethylenediaminetetraacetate, stirred for 6h, transferred to a hydrothermal kettle, and hydrothermally treated at 200°C for 12h; the obtained solid was suction filtered, washed until neutral, dried overnight at 120°C, and then the sample was placed In the muffle furnace, the temperature was raised to 550°C at a rate of 5°C / min and roasted for 8 hours, and the product obtained was a zirconium-based solid solution oxide, which was recorded as 3% Al 2 o 3 -ZrO 2 .

[0031] Weigh 2.0g H-ZSM-35 molecular sieve and put it into a fixed-bed reactor and feed it with 2% pyridine / N 2 Mixed gas, heated to 200°C at a rate of 5°C / min for 12 hours, and then the sample treated with pyridine was treated with 0.05M NaNO 3 The aqueous solution was treated at 80°C for 2h, and the obtained solid was heated to 500°C in a muffle furnace at a rate of 5°C / min and roasted for...

Embodiment 3

[0035] Weigh 1.2g Ca(NO 3 ) 2 4H 2 O was added to 100mL of water and stirred at 30°C for 12h; then 25.0g of Zr(NO 3 ) 4 ·5H 2 O and 20.0g citric acid, stirred for 10h, transferred to a hydrothermal kettle, and hydrothermally treated at 220°C for 36h; the obtained solid was suction filtered, washed until neutral, dried overnight at 120°C, and then the sample was placed in a muffle furnace Raise the temperature at a rate of 5°C / min to 600°C for 10 hours, and the product obtained is a zirconium-based solid solution oxide, which is recorded as 3% CaO-ZrO 2 .

[0036] Weigh 2.0g H-ZSM-11 molecular sieve and put it into a fixed-bed reactor and feed it with 2% pyridine / N 2 Mixed gas, heated to 100°C at a rate of 5°C / min for 6 hours, and then the sample treated with pyridine was treated with 0.05M NaNO 3 The aqueous solution was treated at 80°C for 2h, and the obtained solid was heated to 500°C in a muffle furnace at a rate of 5°C / min and roasted for 5h, and then the sample was...

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Abstract

The invention discloses a catalyst for high-selective conversion of synthesis gas to prepare acetic acid and application thereof, and relates to the acetic acid. The catalyst for high-selective conversion of the synthesis gas to prepare the acetic acid is prepared from the following components in percentage by mass: 30 to 80 percent of zirconium-based solid solution oxide and an octatomic ring-containing modified zealite sieve. The zirconium-based solid solution oxide is MOx-ZrO2, wherein M is at least one of Zn, Al, Ca, Sr, Ba, Ce, Cr, Ti, V, Ga, In and the like; the zirconium-based solid solution oxide comprises 1 to 15 percent by mass of the MOx. The catalyst for high-selective conversion of the synthesis gas to prepare the acetic acid can be applied to preparing the acetic acid.

Description

technical field [0001] The invention relates to acetic acid, in particular to a catalyst for producing acetic acid through highly selective conversion of synthesis gas and its application. Background technique [0002] Acetic acid is one of the important organic acids, mainly used in the production of vinyl acetate, acetic anhydride, acetate and cellulose acetate, among which polyvinyl acetate can be used to prepare films and adhesives, and is also the raw material for synthetic fiber vinylon. At present, the methanol homogeneous carbonylation route represented by Monsanto and BP's Cativa process is mainly used for industrial production, and the catalyst system is a homogeneous rhodium or iridium complex (Adv. Catal., 2010, 53, 1). These two processes require high corrosion-resistant materials due to high requirements on the reactor, and there are problems such as high energy consumption for the separation of the product and the catalyst, and the expensive price of precious ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/18B01J29/40B01J29/65B01J29/70C07C51/12C07C53/08
Inventor 康金灿何顺刘志铭沈政张庆红王野
Owner XIAMEN UNIV
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