Technological process of preparing biological diesel oil with vegetable oil niger

A technology of biodiesel and vegetable oil soap, which is applied in the preparation of liquid hydrocarbon mixture, petroleum industry, biological raw materials, etc., can solve the problems of low degree of development, waste of resources, serious pollution of three wastes, etc., and achieves reduction of fatty acid content, improvement of product quality, The effect of shortening the reaction time

Inactive Publication Date: 2007-03-21
HEFEI UNIV OF TECH
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Problems solved by technology

However, in China, the comprehensive utilization of by-products of rapeseed oil processing is low in development level, and they are mostly used in making soap, fatty acids and acidified oils. The economic benefits are poor, and it also causes waste of resources and even pollutes the environment.
[0006] Someone once used soapstock to obtain crude fatty acid by saponification and acidification, and then obtained biodiesel through acid-catalyzed esterification. This method consumes a lot of acid and alkali, and the pollution of three wastes is serious, so it is not suitable for large-scale production.

Method used

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Embodiment

[0029] The processing method of vegetable oil soapstock production biodiesel comprises the steps:

[0030] 1) Acidified soapstock

[0031] Weigh 100g of rapeseed oil soapstock, add 50% water according to the mass ratio, stir evenly, place in a 500ml three-neck flask, preheat at 85°C, add 10ml of sulfuric acid solution with a concentration of 50% to separate the liquid The funnel was added dropwise into the reaction vessel and timed for 1.5 hours. After the reaction was completed, the layers were left to stand for stratification, the acidified water in the lower layer was removed, and the upper layer was washed and dried to obtain an acidified oil with an acid value of 118.64 mgkOH / g.

[0032] 2) methyl esterification reaction

[0033] Put 100g of acidified oil into a single-necked flask, then add 200ml of methanol, 1.5% (v / w) concentrated sulfuric acid is dissolved in methanol, and put it into a stirrer, connect the reflux device, heat and reflux in a water bath with constant...

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Abstract

The present invention is technological process of preparing biological diesel oil with vegetable oil niger, and features that vegetable oil niger is prepared into biological diesel oil through acidifying with 50 % concentration sulfuric acid solution to obtain acidified oil, adding methanol to react and separating out esterified resultant, adding 20 % concentration methanol solution to obtain crude methyl fatty ester product, molecular distilling the crude methyl fatty ester product to obtain light methyl fatty ester component as the biological diesel oil product with purity up to 95 %. The present invention adopts twice esterification to convert high acid value oil into methyl fatty ester and molecular distilling to refine, and has raised reaction efficiency, short reaction time, product purity over 98 %, recovery of side product glycerin and low technological cost.

Description

technical field [0001] The invention relates to the field of biochemical technology, in particular to a process for producing biodiesel by using vegetable oil soapstock. Background technique [0002] Biodiesel refers to a clean alternative fuel produced from renewable biological resources such as animal and vegetable oils that can be used in compression ignition engines, that is, fatty acid monoesters, which are raw materials and methanol and other low-carbon alcohols in acid, alkali or enzymes It is produced by transesterification reaction under the action of catalyst. At present, with the increasing depletion of oil resources, the whole world will face a crisis of energy shortage. In order to reduce the dependence on oil and reduce the serious environmental pollution caused by oil burning, research institutes and factories in many countries around the world have begun to use biodiesel A comprehensive study of the production. [0003] At present, for various raw materials...

Claims

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Application Information

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IPC IPC(8): C10G3/00
CPCY02E50/13Y02E50/10Y02P30/20
Inventor 姜绍通潘丽军邵平罗水忠李岩郑志
Owner HEFEI UNIV OF TECH
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