Method for preparing biodiesel from oil with high acid value

A high-acid value grease and biodiesel technology, applied in the direction of biofuel, fatty acid esterification, etc., can solve the problems of failing to meet the requirements of industrialization, unstable product quality, low production efficiency, etc., to improve the contact area and contact time, ease of continuous production, and the effect of reducing energy consumption

Active Publication Date: 2013-03-20
山东锦江生物能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] As we all know, the energy problem is the primary problem of economic development, and it is the bottleneck that restricts economic and social development for a long time. However, China's oil resources are poor, and about 55% of oil depends on imports. In 2011, the national annual demand for diesel oil was about 1,138.8 million barrels , the development of biodiesel that can replace petrochemical diesel has become a top priority. The use of waste animal and vegetable oils, etc. The processing and use of biodiesel is a very important strategy for promoting energy substitution, reducing the emission of harmful substances such as carbon, sulfur, hydrocarbons, carcinogenic aromatic hydrocarbons, and waste particulates, protecting the atmospheric environment, maintaining energy security and ecological environment governance Significance; With the increasing depletion of oil resources worldwide and the improvement of people's awareness of environmental protection, the enthusiasm for biodiesel research and development in countries around the world has been increased. In foreign countries, genetically modified vegetable oil is mostly used as raw material, and the cost is high. There is a competition for oil with humans and animals. It is not suitable for China's national conditions; domestic manufacturers mostly use waste animal and vegetable oils such as waste oil, acidified oil, hog oil, and fatty acids as raw materials to produce biodiesel. greater than 150°C), or supercritical process (temperature greater than 300°C), complex process, large equipment investment, high cost, intermittent production, manual control, low production efficiency, waste acid water discharge during production, post-treatment is required; product quality Unstable, unable to meet the requirements of industrialization

Method used

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Examples

Experimental program
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Effect test

Embodiment

[0012] Embodiment, a kind of method for preparing biodiesel with high acid value grease, the method comprises the following steps:

[0013] a. Mix 6 tons of dehydration and deslagging high acid value grease with 1.5 tons of methanol, heat up to 58-62 °C, add 120 kilograms of composite acid catalysts, and pass through static ultra-fine dispersion device and multi-functional refinement contact reactor, Continuously enter the esterification reaction unit to carry out esterification reaction, when the material reaches 2 / 3 of the capacity of the esterification reaction unit, the feeding is completed, and the reaction process is detected by sampling. After the esterification reaction of the material is completed, when the acid value of the reaction solution is less than or equal to 2.0 mgKOH / g, the crude methanol is removed by flash distillation;

[0014] b. In the feed liquid after methanol removal, inject 1.2 tons of raw material with a concentration of 2.5% potassium hydroxide me...

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Abstract

The invention discloses a method for preparing biodiesel from oil with a high acid value. The method comprises the steps as follows: mixing oil with a high acid value with methanol, adding compound acid catalyst, carrying out esterification reaction, removing crude methanol through flash vaporization, adding potassium hydroxide methanol solution, performing transesterification reaction, removing crude methanol through flash vaporization again, standing liquid from which crude methanol is removed and settling for 4 to 5 hours, and removing glycerol through separation to obtain crude biodiesel.The method has the characteristics of low device investment, simple process, low manufacturing cost, high reaction rate and high conversion rate of products.

Description

technical field [0001] The invention belongs to the technical field of energy production methods, and in particular relates to a method for preparing biodiesel with high acid value grease. Background technique [0002] As we all know, the energy problem is the primary problem of economic development and the bottleneck that restricts economic and social development for a long time. However, China's oil resources are poor, and about 55% of the oil depends on imports. In 2011, the annual national diesel demand was about 1,138.8 million barrels. , The development of biodiesel that can replace petrochemical diesel has become a top priority. Using waste animal and vegetable oils, etc. as raw materials to produce renewable clean energy, reduce environmental pollution, prevent garbage oil from going to the table again, and protect the physical and mental health of the general public. ;Processing and using biodiesel has a very important strategy for promoting energy substitution, red...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C11C3/10C11C3/04
CPCY02E50/13Y02E50/10
Inventor 尉刚李凤民宋蕙汝李雪娇赵祥兴计建炳聂勇
Owner 山东锦江生物能源科技有限公司
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