Polymerized ionic liquid catalysis method for preparing biodiesel

A technology for polymerizing ionic liquids and biodiesel, applied in chemical instruments and methods, biofuels, catalytic reactions, etc., can solve the problems of long post-processing process and complicated operation, and achieve convenient synthesis, good atomic economy, and mild reaction conditions. Effect

Active Publication Date: 2017-02-22
HEBEI LONGHAI BIOENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Ionic liquids have advantages that other traditional catalysts do not have. It has both the high-density reactive sites of liquid acids and the non-volatility of solid acids. The acidity can exceed that of solid superacids and can be adjusted as needed. The catalyst and product are easily separated. Therefore, it has attracted much attention in the preparation of biodiesel. However, in recent years, most studies have used ionic liquids for pre-esterification of high-acid value oils, and there are still problems such as complicated operations and long post-treatment processes.

Method used

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  • Polymerized ionic liquid catalysis method for preparing biodiesel
  • Polymerized ionic liquid catalysis method for preparing biodiesel
  • Polymerized ionic liquid catalysis method for preparing biodiesel

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Example 1: Put 0.284 gram of sulfonic acid group functionalized dodecyl polyethylene diammonium p-toluene sulfonate (average molecular weight 7700), 11.2 gram of oleic acid, and 2.6 gram of methanol into the reaction flask, stir, heat, The esterification temperature is 40-65°C. After reacting for 6 hours, the reaction solution was allowed to stand still and separated into layers, the upper layer of the reaction solution was poured out, methanol was distilled off, and the conversion rate of oleic acid was 51.4%.

Embodiment 2

[0038] Embodiment 2: Put 0.295 grams of sulfonic acid functionalized cetyl polyethylene diammonium p-toluene sulfonate (average molecular weight 8000), 11.2 grams of oleic acid, and 2.6 grams of methanol into the reaction flask, stir, heat, The esterification temperature is 40-65°C. After reacting for 6 hours, the reaction solution was allowed to stand and separated into layers, the upper layer of the reaction solution was poured out, methanol was distilled off, and the conversion rate of oleic acid was 53.4%.

Embodiment 3

[0039] Embodiment 3: Put 0.295 grams of sulfonic acid functionalized cetyl polyethylene diammonium p-toluene sulfonate (average molecular weight 24000), 11.2 grams of oleic acid, and 2.6 grams of methanol into the reaction flask, stir, heat, The esterification temperature is 40-65°C. After reacting for 6 hours, the reaction solution was allowed to stand still and separated into layers, the upper layer of the reaction solution was poured out, methanol was evaporated, and the conversion rate of oleic acid was 77.3%.

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Abstract

The invention discloses a polymeric ionic liquid catalysis method for preparing the biodiesel. The method comprises the steps of A) adopting an acid-functionalized polymeric ionic liquid as a reaction catalyst for catalyzing the reaction of fatty acids and short-chain alcohols for 3-6 hours at 40-65 DEG C, wherein the molar ratio of fatty acids to short-chain alcohols is 1: 1 to 1: 4, and the weight ratio of the above acid-functionalized polymeric ionic liquid to the total weight of reactants is 1: 4 to 1: 55; B) layering the reaction liquid obtained in the step A), decompressing the supernatant liquid to remove short-chain alcohols and then obtaining a product. The acid-functionalized polymeric ionic liquid is composed of sulfonic acid group-functionalized alkyl-substituted polyoxyalkylene ammonium cations and inorganic or organic anions. The method is free of environmental pollution and belongs to the environment-friendly process.

Description

technical field [0001] The invention relates to a method for catalyzing an esterification reaction with a functionalized polymerized ionic liquid, in particular to a method for catalyzing a polymerized ionic liquid to prepare biodiesel. Background technique [0002] The dwindling of petroleum resources has led to energy shortages and soaring petroleum prices, making people pay more and more attention to the substitutes of petroleum fuels. The development of biodiesel using renewable resources is a petroleum energy substitute that has attracted much attention in recent years. It is very important to alleviate the global energy shortage. It is of great significance to reduce environmental pollution. At present, foreign countries mainly use rapeseed oil or soybean oil as raw material to produce biodiesel by transesterification method. Due to China's large population and relatively scarce arable land, the cost of producing biodiesel from edible oils such as rapeseed oil and soy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11C3/00C10L1/02B01J31/02
CPCB01J31/0285B01J2231/49C10L1/02C11C3/003Y02E50/10
Inventor 常涛秦身钧袁明霞张广清何乐芹李慧
Owner HEBEI LONGHAI BIOENERGY TECH
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