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Solid base catalyst and preparation method and application thereof

A solid base catalyst and carrier technology, applied in the field of catalysis, to achieve the effects of harsh reaction conditions, high and low temperature catalytic activity and product selectivity, and short reaction time

Active Publication Date: 2019-05-21
CHINA NAT OFFSHORE OIL CORP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The first object of the present invention is to provide a solid base catalyst, which has high activity, good stability, long service life, and can be reused many times, and the solid base catalyst can solve the existing problems in the transesterification reaction. The use temperature of solid base catalyst is high, improve the efficiency of transesterification reaction, and have high selectivity to alkyl carbonate products, especially dimethyl carbonate and diethyl carbonate

Method used

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  • Solid base catalyst and preparation method and application thereof
  • Solid base catalyst and preparation method and application thereof
  • Solid base catalyst and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0046] The preparation method of solid base catalyst comprises the steps:

[0047] Prepare 100mL of mixed aqueous salt solution of zinc nitrate and aluminum nitrate with deionized water, wherein the concentration of zinc ions is 0.6mol / L and the concentration of aluminum ions is 0.3mol / L; prepare 80mL of mixed alkali of sodium hydroxide and sodium carbonate Solution, wherein, sodium hydroxide concentration is 2.0mol / L, and sodium carbonate concentration is 0.5mol / L. After stirring the above mixed salt solution and mixed alkali solution for 1 hour, drop them into a three-neck flask at 75°C, control the pH to 9.5, stir thoroughly for 1.5 hours, and transfer the slurry to a 200mL stainless steel reaction vessel lined with polytetrafluoroethylene. Crystallize at 120°C for 4 hours in a kettle, wash the resulting slurry with deionized water to a pH range of 7-8, then dry at 90°C for 24 hours, and grind to prepare a zinc-aluminum hydrotalcite precursor. Prepare sodium aluminate into...

Embodiment 2

[0049] The preparation method of solid base catalyst comprises the steps:

[0050] Prepare 100mL of mixed aqueous salt solution of nickel nitrate and aluminum nitrate with deionized water, wherein the concentration of nickel ions is 1.2mol / L, and the concentration of aluminum ions is 0.4mol / L; prepare 80mL of mixed alkali of sodium hydroxide and sodium carbonate Solution, wherein, sodium hydroxide concentration is 2.0mol / L, and sodium carbonate concentration is 0.5mol / L. After stirring the above mixed salt solution and mixed alkali solution for 1 hour, drop them into a three-neck flask at 75°C, control the pH to 10, stir thoroughly for 1.5 hours, and transfer the slurry to a 200mL stainless steel reaction vessel lined with polytetrafluoroethylene. Crystallize at 120°C for 4 hours in a kettle, wash the resulting slurry with deionized water to a pH range of 7-8, then dry at 90°C for 24 hours, and grind to prepare a nickel-aluminum hydrotalcite precursor. Prepare sodium aluminat...

Embodiment 3

[0052] The preparation method of solid base catalyst comprises the steps:

[0053] Prepare 100 mL of a mixed aqueous salt solution of cobalt nitrate and aluminum nitrate with deionized water, wherein the concentration of cobalt ions is 0.6 mol / L and the concentration of aluminum ions is 0.2 mol / L; prepare 80 mL of mixed alkali of sodium hydroxide and sodium carbonate Solution, wherein, sodium hydroxide concentration is 2.0mol / L, and sodium carbonate concentration is 0.5mol / L. After stirring the above mixed salt solution and alkali solution for 1 hour, drop them into a three-neck flask at 75°C, control the pH to 10, stir thoroughly for 1.5 hours, and transfer the slurry to a 200mL stainless steel reaction kettle lined with polytetrafluoroethylene , crystallized at 140°C for 4 hours, washed the resulting slurry with deionized water to a pH range of 7-8, then dried at 90°C for 12 hours, and ground to obtain the cobalt aluminum hydrotalcite precursor. Prepare sodium aluminate int...

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Abstract

The invention discloses a solid base catalyst. The solid base catalyst is structurally prepared from a carrier and an active component loaded on the carrier; the active component is selected from sodium aluminate; the carrier is a composite metal oxide, and the composite metal oxide is selected from at least one of a composite zinc-aluminium metal oxide, a composite nickel-aluminum metal oxide anda composite cobalt-aluminum metal oxide. The solid base catalyst is high in stability, long in service life, high in low-temperature catalysis activity, and short in reaction time. The invention further discloses a preparation method and application of the solid base catalyst.

Description

technical field [0001] The present invention relates to the field of catalysis. More specifically, it relates to a solid base catalyst and its preparation method and application. . Background technique [0002] Dialkyl carbonate, especially dimethyl carbonate, is a class of environmentally friendly organic chemical raw materials that meet the requirements of modern "clean technology". Due to its low toxicity, high solubility, excellent environmental performance and good reactivity, it is widely used It has a broad market in rapidly developing industries such as carbonylation and methylation reagents, gasoline additives, raw materials for polycarbonate synthesis, coating solvents, and lithium battery electrolytes. It is a popular "green" chemical product in the chemical industry today. [0003] In recent years, a large amount of patents about the production and application of dimethyl carbonate (DMC) and diethyl carbonate (DEC) have been published at home and abroad, and th...

Claims

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Application Information

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IPC IPC(8): B01J23/06B01J23/755B01J23/75C07C68/06C07C69/96C07C27/00C07C29/128C07C31/20
Inventor 喻文傅送保王凯侯章贵
Owner CHINA NAT OFFSHORE OIL CORP
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