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Process for preparing biodiesel from chinaberry seed oil

A technology of biodiesel and neem seeds, which is applied in the direction of biofuel, biological raw material, fat oil/fat refining, etc., can solve the problem of conversion rate of polluted environment, etc., and achieve the effect of improving the process and comprehensive utilization effect

Inactive Publication Date: 2008-10-22
NORTHWEST A & F UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a kind of method that uses neem seed oil to prepare biodiesel, to overcome the problems of polluted environment and low conversion rate existing in the prior art

Method used

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  • Process for preparing biodiesel from chinaberry seed oil

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Pretreatment stage: Weigh 1000g of dried neem seed oil, preheat to 30°C in a vacuum constant temperature reactor, preheat 2500mL of anhydrous methanol to the same temperature and add it to the reactor, slowly stir and extract for 20min, Extract 3 times, transfer the reaction product to a separatory funnel and let it stand for stratification, recover the methanol phase in the lower layer, transfer the oil phase in the upper layer to the distillation bottle of the rotary evaporator, and keep it under the condition of 70°C and 100r / min. Distill under pressure to recover the residual methanol, then dry with anhydrous sodium sulfate, and vacuum filter to remove sodium sulfate to obtain neem seed oil with low acid value.

[0021] (2) Transesterification reaction: Weigh 1000g of pretreated neem oil and transfer it to a vacuum constant temperature reaction kettle, install the reaction kettle, and preheat the oil to the reaction temperature of 55°C, add fully miscible And be...

Embodiment 2

[0025] (1) Pretreatment stage: Weigh 1000g of dried neem seed oil, preheat to 35°C in a vacuum constant temperature reactor, preheat 2000mL of absolute ethanol to the same temperature and add it to the reactor, slowly stir and extract for 15min, Extract 4 times, transfer the reaction product to a separatory funnel and let it stand for stratification, recover the lower ethanol phase, transfer the upper oil phase to the distillation bottle of the rotary evaporator, and store it under normal pressure at 80°C and 120r / min. Distill and recover the remaining ethanol, then dry it with activated alumina, and vacuum filter the activated alumina to obtain neem oil with low acid value.

[0026] (2) Transesterification reaction: Weigh 1000g of pretreated neem seed oil and transfer it to a vacuum constant temperature reactor, install the reactor, and preheat the oil to the reaction temperature of 65°C, add fully miscible And be preheated to the KOH-ethanol solution (wherein containing 16g ...

Embodiment 3

[0030] (1) Pretreatment stage: Weigh 1000g of dried neem seed oil, preheat to 40°C in a vacuum constant temperature reactor, preheat 1500mL of anhydrous methanol to the same temperature and add it to the reactor, slowly stir and extract for 10min, Extract 5 times, transfer the reaction product to a separatory funnel and let it stand for stratification, recover the methanol phase of the lower layer, transfer the upper oil phase to the distillation bottle of the rotary evaporator, and store it under normal pressure at 70°C and 100r / min. Distill and recover the remaining methanol, then dry it with anhydrous sodium sulfate, and vacuum filter to remove sodium sulfate to obtain neem seed oil with low acid value.

[0031] (2) Transesterification reaction: Weigh 1000g of pretreated neem oil and transfer it to a vacuum constant temperature reaction kettle, install the reaction kettle, and preheat the oil to the reaction temperature of 45°C, add fully miscible And be preheated to the KO...

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Abstract

The invention relates to a method for making biodiesel oil, in particular to a method for making biodiesel oil by chinaberry seed oil. The method aims to overcome the problems of the prior art including environmental pollution and low transformation efficiency, and adopts a technical proposal comprising the following: (1) a step of pretreatment, during which, dried chinaberry seed oil is extracted by solvent to realize deacidification; (2) a step of ester interchange reaction, during which, low-acid value chinaberry seed oil is taken as raw material and is added in dried methyl alcohol or dehydrated alcohol and potassium hydroxide; (3) a step of posttreatment during making biodiesel oil, during which, atmospheric distillation is carried out and then ester phase is absorbed in a stirring state, and finally, finished product biodiesel oil is obtained through drying by means of anhydrous sodium sulfate or active aluminum oxide. Compared with the prior art, the method has the advantages and effects of (1) wide applicability, (2) ideal effect, (3) high purity and (4) excellent comprehensive utilization effect.

Description

1. Technical field: [0001] The invention relates to a method for preparing biodiesel, in particular to a method for preparing biodiesel from neem seed oil. 2. Background technology: [0002] The existing biodiesel preparation methods mainly include direct mixing method, microemulsion method, high temperature pyrolysis method, supercritical alcohol method and transesterification method. At present, the main method for the industrial production of biodiesel is the transesterification method, but in the prior art, in the post-treatment process of the transesterification reaction, the ester phase is first neutralized with acid and then washed with water, which will produce waste lye and pollute the environment , while washing with water will also affect the conversion rate of the product biodiesel due to emulsification. 3. Contents of the invention: [0003] The purpose of the present invention is to provide a method for preparing biodiesel from neem seed oil, so as to overco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G3/00C11B3/00C11C3/10
CPCY02E50/13Y02E50/10Y02P30/20
Inventor 苏印泉李秀红杨芳霞马养民黄文捷薛刚
Owner NORTHWEST A & F UNIV
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