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Novel biodiesel with low cold filter plugging point and preparation method thereof

A technology of biodiesel and cold filter point, which is applied in the direction of biofuel, fatty acid preparation/refining, fat production, etc. It can solve the problems of cumbersome methods and great differences in the quality of biodiesel, so as to expand the use range, reduce reaction toxicity, and improve the quality of biodiesel. The effect of low temperature fluidity

Inactive Publication Date: 2015-11-25
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] To sum up, due to the wide range of sources of raw materials for biodiesel, the quality of biodiesel produced from different raw materials varies greatly, and the current methods for improving the low-temperature performance of biodiesel are relatively cumbersome, and the production process is also affected by some other objective factors. This poses a greater challenge to improve the low temperature flow properties of biodiesel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: Mix natural oil and waste oil with fusel oil, add the catalyst for preparing biodiesel, wherein the molar ratio of fusel oil and oil is 1:1~8:1, and the amount of catalyst required for the reaction is 0.2% ~20%, at 20~200°C, react for 0.5~24 hours to obtain a mixed solution; wash the mixed solution with water and centrifuge to obtain the upper phase product crude fusel ester and water phase impurities, glycerin, catalyst and Fusel alcohols can be recovered and reused; crude fusel alcohol esters are distilled to obtain fusel alcohols and fine fusel alcohol esters. The fine fusel alcohol esters are biodiesel with a low cold filter point, and the fusel alcohols obtained by distillation can be recycled and reused.

[0021] Natural oils are vegetable and animal oils, including: soybean oil, rapeseed oil, corn oil, walnut oil, cottonseed oil, olive oil, palm oil, coconut oil, linseed oil, algae oil, peanut oil, sunflower oil, lard, One or more mixtures of butter...

Embodiment 2

[0025] Embodiment 2: With acid number 0.2mgKOH / g, the soybean oil that water content is 0.2% is raw material, gets 50g and joins in the 250ml three-necked flask that is accompanied by stirring device, adds 50g fusel oil simultaneously and mixes and stirs to proper temperature, Add alkaline catalyst 1gKOH to carry out chemical catalytic reaction, further heat to 80°C and maintain the reaction for 4h, let it stand properly and transfer it to a water washing device. At this time, the mixture is an alkaline catalytic reaction solution with a fusel alcohol ester content of 85%. Water 50ml / batch for 2 batches of washing, and then washing with hot water until neutral. The washed crude fusel alcohol ester was refined in a vacuum distillation device, and the fraction at 200-300°C was collected to obtain 40g of fine fusel alcohol ester. The cold filter point drop of the new biodiesel was measured to be 15°C.

Embodiment 3

[0026]Embodiment 3: With acid value 139.2mgKOH / g, the waste oil that water content is 1.1% is raw material, gets 100g and joins in the 250ml there-necked flask that is accompanied by stirring device, adds 50g fusel oil simultaneously and mixes and stirs to proper temperature, Add 1g of concentrated sulfuric acid with an acidic catalyst mass fraction of 98% for chemical catalytic reaction, further heat to 70°C and maintain the reaction for 3h, let it stand properly and transfer it to a water washing device. At this time, the mixture is an acidic catalytic reaction with a fusel ester content of 81.5%. The reaction solution was washed with 100 ml / batch of saturated brine for 2 batches, and then washed with hot water until neutral. The washed crude fusel alcohol ester was refined in a vacuum distillation device, and the fraction at 200-300°C was collected to obtain 76g of fine fusel alcohol ester. The cold filter point drop of the new biodiesel was measured to be 8°C.

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Abstract

The invention provides a novel biodiesel with a low cold filter plugging point and a preparation method thereof. Natural grease or waste grease are mixed with fusel oil, a catalyst is added, wherein the mol ratio between fusel oil and grease is 1:1-8:1, the catalyst amount needed in a reaction is 0.2-20%, the reaction is carried out for 0.5-20 hours at 20-200 DEG C, and a mixed liquor is obtained; the mixed liquor is washed with water and centrifuged, and an oil phase product crude fusel ester and a water phase impurity are obtained; the crude fusel ester is distilled, fusel and refined fusel ester are obtained, and the refined fusel ester is the biodiesel with a low cold filter plugging point. According to the invention, natural grease or waste grease and fusel oil are used as raw materials for reacting and preparing the biodiesel, the low temperature fluidity of the product is substantially improved, and the cold filter plugging point is decreased by 5-15%. According to the invention, the product can be mixed with petrochemical diesel oil and biodiesel with a high cold filter plugging point, and thereby improving low temperature properties of the biodiesel with the high cold filter plugging point, and expanding the usage scope of the biodiesel with the high cold filter plugging point.

Description

technical field [0001] The invention belongs to the field of biochemical industry and relates to a method for preparing biodiesel, in particular to a method for preparing biodiesel with a low cold filter point. Background technique [0002] Biodiesel is a green, environmentally friendly and renewable energy. Under the background of energy crisis and oil depletion, the development of biodiesel is particularly important. Biodiesel is a renewable biomass energy, and its main component is fatty acid short-chain alcohol ester. Algae and other oil-bearing aquatic plants, animal fats, waste cooking oil, etc. are used as raw materials, and have properties similar to those of petroleum diesel. At the same time, biodiesel has attracted much attention because of its low sulfur content, low aromatics content, excellent lubricity, renewable, and environmental friendliness. [0003] The raw materials of synthetic biodiesel contained in natural oils and waste oils are usually monoglyceri...

Claims

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Application Information

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IPC IPC(8): C11C3/04C11C1/08C11B7/00C10L1/02
CPCY02E50/10
Inventor 邓利王萌恽峰聂开立张欣王芳谭天伟
Owner BEIJING UNIV OF CHEM TECH
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