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Preparation method of binuclear imidazole ionic solid base for catalytic synthesis of biodiesel fuel

A technology for synthesizing biology and ribimidazole, which is applied in chemical instruments and methods, biofuels, chemical/physical processes, etc., can solve the problems of difficult separation of catalysts and low reusability of catalysts, and achieves improved reusability and strong alkalinity. , the effect of low reaction temperature

Active Publication Date: 2017-12-29
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Wang Lulu (Acta Fuel Chemistry, 2015, 1:59-64) synthesized bis-(N-methylmorpholine) butylene dihydroxide dinuclear alkaline ionic liquid NB-OH, which catalyzed the reaction between soybean oil and methanol, but there was The catalyst is difficult to separate from the product, and the reusability of the catalyst is not high

Method used

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  • Preparation method of binuclear imidazole ionic solid base for catalytic synthesis of biodiesel fuel
  • Preparation method of binuclear imidazole ionic solid base for catalytic synthesis of biodiesel fuel
  • Preparation method of binuclear imidazole ionic solid base for catalytic synthesis of biodiesel fuel

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Embodiment 1

[0036] 1. Preparation of binuclear imidazolium ion solid base [CTBM] / Zr-SBA-15

[0037] 1) Add 1, 2, 4-triazole, silane coupling agent, and acetonitrile into the reactor, stir and mix at 80°C, pass N 2 Condensate and reflux for 24 hours to realize the N-alkylation reaction of triazole, then add 1-bromo-2-chloroethane and pass N at 70°C 2 Condensation and reflux reaction for 24 hours, after the organic solvent acetonitrile was evaporated under reduced pressure, a kind of organosilicon mononuclear ion salt [CTB]Br was obtained, and the added components 1, 2, 4-triazole, silane coupling agent, 1 The mass ratio of -bromo-2-chloroethane and acetonitrile is 1: 3.5: 2: 20, and the used organic solvent acetonitrile is dewatered with dewatering agent anhydrous magnesium sulfate earlier before use, in order to avoid silane coupling agent (3- Chloropropyltriethoxysilane) hydrolyzes with water, and ethoxy breaks with water.

[0038] 2) At 40°C, the surfactant polyethylene oxide-polyprop...

Embodiment 2

[0043] Example 2 (comparative example) operating steps are the same as Example 1, but after obtaining [CTB]Br / Zr-SBA-15 in step 3) of catalyst preparation in 1, no methylimidazole is added and the N is passed at 120°C 2 Condensation and reflux for 24 hours, the obtained catalyst is a mononuclear imidazolium ion solid base [CTB]OH / Zr-SBA-15, and the mass yield of biodiesel product is 87.6%.

Embodiment 3

[0044] Example 3 (Comparative Example) The operation steps are the same as in Example 1, but after obtaining [CTB]Br / Zr-SBA-15 in step 3) of preparing the catalyst in 1, no methylimidazole is added and the N is passed at 120 ° C. 2 Condensation and reflux for 24 hours, the obtained catalyst is a mononuclear imidazolium ion solid base [CTB]OH / Zr-SBA-15, the reaction time is also changed to 4 hours, and the mass yield of biodiesel product is 63.4%.

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Abstract

The invention discloses a preparation method of binuclear imidazole ionic solid base (CTBM) / Zr-SBA-15 for catalytic synthesis of biodiesel fuel. The binuclear imidazole ionic solid base has high stability and alkalinity; a short mesoporous Zr-SBA-15 molecular sieve support is effective in lowering diffusion resistance of oil molecules in ducts, thereby avoiding blockage and increasing the yield of the biodiesel fuel and reusability of a catalyst; the catalytic active reaction temperature is low, methanol volatilization and condense-recycling load are decreased, the molar ratio of methanol to the fuel is 20:1, the mass ratio of the catalyst to grease is 0.05:1, the reaction temperature is 65-85 DEG C, reaction time is 8-10 h, and the mass yield of the biodiesel fuel is 95-97%.

Description

technical field [0001] The invention belongs to the field of catalytic synthesis of biomass energy, and relates to a preparation method of dinuclear imidazolium ion solid base [CTBM] / Zr-SBA-15 for catalytic synthesis of biodiesel. Background technique [0002] As a clean and renewable energy, biodiesel has good combustion, environmental protection, and less sulfur and nitrogen compound emissions, especially the utilization of waste oil has important social and environmental protection significance. Synthetic biodiesel is usually catalyzed by homogeneous acid or base in industry, such as sulfuric acid, hydrochloric acid, phosphoric acid, NaOH, KOH, NaOCH 3 Wait. Although the homogeneous catalytic reaction conditions are mild, the catalyst cost is low, and the reaction rate is fast, the catalyst cannot be reused, the product needs to be washed many times, the process is relatively complicated, a large amount of waste acid and alkali is produced, the environmental protection b...

Claims

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Application Information

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IPC IPC(8): B01J31/02C10L1/02
CPCC10L1/02B01J31/0275B01J35/615B01J35/617B01J35/635B01J35/638B01J35/647Y02E50/10
Inventor 刘跃进王亮刘宁潘浪胜李勇飞陈雪梅吴梅
Owner XIANGTAN UNIV