Vanadium-phosphorus-zirconium-titanium composite oxide catalyst for synthesising acrylic acid (ester) as well as preparation method and application of vanadium-phosphorus-zirconium-titanium composite oxide catalyst

A technology of composite oxides and catalysts, which is applied in the preparation of carboxylic acid esters, the preparation of organic compounds, and catalysts for physical/chemical processes. Stability, excellent conversion rate, and long service life

Active Publication Date: 2015-04-01
SOUTHWEST RES & DESIGN INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the presence of water will inhibit the main reaction rate and have a greater impact on the catalyst. Under high temperature h

Method used

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  • Vanadium-phosphorus-zirconium-titanium composite oxide catalyst for synthesising acrylic acid (ester) as well as preparation method and application of vanadium-phosphorus-zirconium-titanium composite oxide catalyst
  • Vanadium-phosphorus-zirconium-titanium composite oxide catalyst for synthesising acrylic acid (ester) as well as preparation method and application of vanadium-phosphorus-zirconium-titanium composite oxide catalyst
  • Vanadium-phosphorus-zirconium-titanium composite oxide catalyst for synthesising acrylic acid (ester) as well as preparation method and application of vanadium-phosphorus-zirconium-titanium composite oxide catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Carrier modification: Titanium dioxide is used as the carrier, and B and Ce oxides are used as modification aids.

[0029] Take boric acid 2.3g (accounting for 3% of carrier weight in boron oxide), cerium nitrate hexahydrate 4.3g (accounting for 4% of carrier weight in cerium oxide) adds deionized water 35g preparation solution, then weighs 40gTiO 2The powder was added to the prepared solution, soaked at room temperature for 4 hours, then dried at 100°C for 5 hours, and then put into a muffle furnace and roasted at 500°C for 4 hours to obtain a modified carrier.

[0030] (2) Preparation of vanadium phosphorus zirconium titanium composite sol

[0031] Take 42.5g of butyl titanate, dissolve it in 80ml of absolute ethanol, add a small amount of deionized water and glacial acetic acid, then weigh 7.1g of zirconium nitrate and add it, stir evenly to obtain a titanium-zirconium sol, and then take 100ml of 8mol / L Phosphoric acid solution was slowly added to the mixed sol,...

Embodiment 2

[0034] (1) Carrier modification: HZSM-5 is used as the carrier, and B, Ce, and La oxides are used as modification aids.

[0035] Take boric acid 1.9g (accounting for 3% of carrier weight in boron oxide), 3.5g of cerium nitrate hexahydrate (accounting for 4% of carrier weight in cerium oxide), lanthanum nitrate 1.9g (accounting for lanthanum oxide, accounting for 2% of the total weight of the carrier) plus 30 g of deionized water to prepare a solution, then weigh 32 g of HZSM-5 molecular sieve powder, add it to the prepared solution, soak it at room temperature for 4 hours, then dry it at 100 ° C for 5 hours, and then put it into the muffle Calcined in a furnace at 500°C for 4h to obtain a modified carrier.

[0036] (2) Preparation of vanadium phosphorus zirconium titanium composite sol

[0037] Take 70.8g of butyl titanate, dissolve it in 120ml of absolute ethanol, add a small amount of deionized water and glacial acetic acid, then weigh 28.3g of zirconium nitrate and add it,...

Embodiment 3

[0040] (1) Carrier modification: TiO 2 , SiO 2 as the carrier, Al, Ce, La oxides as modification aids.

[0041] Take by weighing aluminum nitrate 15.4g (in terms of aluminum oxide, account for 6% of the weight of the carrier), 4.4g of cerium nitrate hexahydrate (in terms of cerium oxide, account for 5% of the weight of the carrier), 1.9g of lanthanum nitrate (in terms of lanthanum oxide, Accounting for 2% of the total weight of the carrier) add 40g of deionized water to prepare the solution, then weigh 20gTiO 2 and 10gSiO 2 The powder was added to the prepared solution, soaked at room temperature for 4 hours, then dried at 100°C for 5 hours, and then put into a muffle furnace and roasted at 500°C for 4 hours to obtain a modified carrier.

[0042] (2) Preparation of vanadium phosphorus zirconium titanium composite sol

[0043] Take 81.6g of butyl titanate, dissolve it in 120ml of absolute ethanol, add a small amount of deionized water and glacial acetic acid, then weigh 47....

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Abstract

The invention relates to a catalyst for synthesising acrylic acid (ester), especially relates to a vanadium-phosphorus-zirconium-titanium composite oxide catalyst for synthesising acrylic acid and ester as well as a preparation method and application of the vanadium-phosphorus-zirconium-titanium composite oxide catalyst, and belongs to the field of catalytic material preparation technologies and application. The catalyst disclosed by the invention takes one or the mixture of more of TiO2, SiO2 and a molecular sieve as a support for supporting active components and active auxiliaries; the active components are composite oxides of V, P, Zr and Ti, and the active auxiliaries are one or more oxides of B, Al, Ce and La and can be used for modifying the support. The catalyst disclosed by the invention is used in the reaction of synthesising acrylic acid (ester) from formaldehyde and acetic acid, and has high activity and selectivity; the per-pass conversion rate of the acetic acid achieves 50%, and the selectivity of the acrylic acid and ester of products is up to 90%; moreover, the catalyst is good in thermostability, and good in water resistance and carbon deposition resistance.

Description

technical field [0001] The invention relates to a catalyst for synthesizing acrylic acid (ester), in particular to a vanadium-phosphorus-zirconium-titanium composite oxide catalyst for synthesizing acrylic acid (ester), a preparation method and application thereof, and belongs to the field of preparation technology and application of catalytic materials. Background technique [0002] Acrylic acid (ester) is an important organic chemical raw material. Acrylic acid (ester) is widely used in homopolymerization and copolymerization reactions, and can react with various compounds to synthesize a series of propylene copolymers. Widely used in construction, sanitation, plastics, food packaging, automobiles, electrical appliances and textile industries. In 2014, my country's demand for acrylic acid (ester) reached 1.5 million tons, accounting for more than 20% of the world's total consumption. big country. At present, almost all industrialized large-scale acrylic acid (ester) prod...

Claims

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Application Information

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IPC IPC(8): B01J27/198B01J29/48C07C51/353C07C57/04C07C67/343C07C69/54
Inventor 李洁谭平华赖崇伟肖洪梅熊国焱
Owner SOUTHWEST RES & DESIGN INST OF CHEM IND
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