KR20100026079A - The method of manufacturing the high purity bio-diegel fuel with rancid oil - Google Patents

Abstract

PURPOSE: A method or manufacturing biodiesel fuel of high purity using waste oil is provided to lower pour point and to reduce process cost using distilled by-product as a boiler fuel. CONSTITUTION: A method for manufacturing biodiesel fuel using waste oil comprises: a step of inputting waste oil to precipitation container and preheater to adjust temperature at 80-90°C; a step of inputting ingredient to a reactor to remove moisture; a step of adding sodium methoxide in a mole ratio of 1:9; a step of reacting in a reactor at 75-80°C for 45 to 60 minutes and shaking at 150 rpm to promote reaction; a step of centrifuging the reacted product and removing secondary glycerin and impurities; a step of distilling methanol at 65-75°C and 60torr; a step of adding 1-2% of acid clay and filtering to remove impurities; and a step of adding secondary distilled water and setting 200-240°C and 10-30 torr to obtain biodiesel.

Description

The method of manufacturing the high purity bio-diegel fuel with rancid oil}

Waste oil is used as a raw material, and methanol and alkali catalysts are added at the same time to react, and then the glycerin layer separation process is performed.

There is a growing interest in developing alternative fuels as the crisis of oil resource depletion rises. Biodiesel has the advantages of being environmentally friendly and free of resources depletion. It can also be used directly on existing vehicles and supplied at currently installed gas stations. It does not require infrastructure. Biodiesel produced by esterification of vegetable oil has much lower environmental pollutants than diesel, and has been used as a vehicle fuel in the EU and US since the early 1990s. Biodiesel currently produces edible oil extracted from oil crops as a raw material. As a result, more than 70% of the total production cost of biodiesel is raw material. Therefore, in order to lower the production cost of biodiesel, it is necessary to secure cheaper raw materials. In particular, considering that there is little cooking oil production in Korea, there is a problem in that raw materials, like petroleum, have to depend on overseas resources for raw materials. In order to solve this problem, it is very important to utilize waste cooking oil discharged from Korea as a biodiesel raw material. Compared to the need for waste cooking oil, the conventional technology includes various impurities, unlike cooking oil extracted from oil and fat, which is a direct cause of deterioration in biodiesel production. Although several patents and papers have been published, the existing manufacturing method has the disadvantage of producing biodiesel that is less than the quality standard due to low production yield, low purity, filter plugging point and pour point.

Increases the production yield of conventional waste cooking oil and prevents wastewater in the post-treatment process of biodiesel, which has been highlighted as a disadvantage, prevents reduction of processing costs and pollution, and is less than quality standards due to impurities contained in biodiesel. And the filter plugging point and the pour point, which are disadvantages of the waste cooking oil, are aimed at producing 99% or more of high purity biodiesel due to the secondary distillation process.

1. The high purity biodiesel manufactured by the known technology has higher purity (99% fatty acid methyl ester content) and lower pour point than biodiesel using waste cooking oil as a raw material.

2. Crude biodiesel is environmentally friendly and prevents environmental pollution by removing impurities and bases without washing with water.

3. Cost reduction, waste treatment and clean alternative fuel are produced using waste cooking oil to bring economic ripple effect, and distillation by-product is used as boiler fuel to reduce manufacturing process cost.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a biodiesel manufacturing process using waste cooking oil, which is filtered during the input of waste cooking oil (1) into a hopper settling tank and a temperature preheater to adjust the raw material temperature to 80 to 90 ° C (2) a raw material in a 60torr vacuum state in a reactor Dry the water contained in the waste cooking oil by adding. In the catalyst tank of (3) (sodium methoxide (0.9 ~ 1% of the raw material) + methanol) is added to the reaction tank in a 1: 9 molar ratio of the raw material. (2) Rotate the speed up to 150rpm while reacting for about 45 ~ 60 minutes at 75 ~ 80 ℃ temperature in the reactor and promote the reaction by using circulation pump. After completion of the reaction, the product (4) is transferred to the settling tank and settled for 1 ~ 2 hours, and then the primary glycerin and impurities are removed by natural precipitation, and (5) the secondary glycerin and impurities are removed through a centrifuge. The crude biodiesel transferred through (5) is transferred to the first still, and the methanol contained therein is distilled into methanol by distilling methanol into a storage tank at 60 to 60 ° C at 65 to 75 ° C. The crude biodiesel is reused in (6). To remove the base and impurities, add 1 ~ 2% of acid clay and rotate at 150rpm for 20 minutes in vacuum at 80 ~ 90 ℃. After filtering, the secondary impurities are removed and then (8) input to the secondary distiller. Distillation temperature is set at 200 ~ 240 ℃ vibration and 10 ~ 30torr to produce colorless high purity biodiesel (9) about 5 ~ 7% The distillation residues of can be used as boiler fuel can reduce the manufacturing cost.

1 is a biodiesel manufacturing process drawing from waste edible oil as raw material

Figure 2 Pour point and purity improvement chart by the second distillation process

Claims (2)

Waste oil is used to replace the existing diesel fuel used in internal combustion engines. Secondary distillation is used to produce biodiesel of high purity through secondary distillation and to replace distilled residues with boiler fuel. Wastewater generation that may occur in crude biodiesel production using acidic clay to remove impurities and bases and lower pour point than biodiesel manufactured from waste cooking oil as a secondary secondary distillation process

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