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Process for preparing biological diesel oil by using waste oil

A biodiesel and waste oil technology, which is applied in the preparation of biological raw materials, biofuels, liquid hydrocarbon mixtures, etc., can solve the problem of waste oil ester conversion rate due to high by-product yield, difficult to achieve technical indicators, and unfavorable use of waste oil resources and other problems, to achieve the effects of easy control of the reaction process, environmental protection, and simple process

Inactive Publication Date: 2007-02-07
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Most of the existing domestic biodiesel production patents use soybean oil as the raw material for production, which is not conducive to the use of existing domestic waste oil resources; and the reaction time is long, and the process is not easy to control
Due to the following problems in the production of biodiesel at present (1) the existing technology can only produce biodiesel with edible animal and vegetable oil, and the production cost is too high; (2) the production of biodiesel with waste vegetable oil is unstable in product quality, and the technical indicators are difficult to reach the EU At the same time, the conversion rate of waste oil and ester is low due to the high yield of by-products, and the problem of secondary pollution is still obvious

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Raw materials: 250ml of waste cooking oil

[0020] Firstly, the waste catering oil is pretreated, that is, heated to 45°C, vacuum filtered to remove mechanical impurities, then 30% phosphoric acid is added for pickling to remove phospholipids, spin separation, water washing, and dehydration with polyhydroxy absorbent resin. Then get methyl alcohol, its add-on is 25% of waste oil weight after pretreatment, be 30 ℃ at temperature, adopt sodium methylate as basic catalyst, catalyst concentration is 1.0% relative to the weight of waste oil after treatment, and the reaction time is 60min The conversion rate of waste oil reached 92.4%, and the dynamic viscosity was 5.3mm at 20°C 2 / s

Embodiment 2

[0022] Raw materials: 250ml of waste cooking oil

[0023] Firstly, the waste catering oil is pretreated, that is, heated to 60°C, vacuum filtered to remove mechanical impurities, then 40% phosphoric acid is added for pickling to remove phospholipids, spin separation, water washing, and dehydration with polyhydroxy absorbent resin. Then get methyl alcohol, its add-on is 20% of waste oil weight after pretreatment, be 60 ℃ at temperature, adopt sodium methylate as basic catalyst, catalyst concentration is 0.7% relative to the weight of waste oil after treatment, and the reaction time is 30min The conversion rate of waste oil reached 91.6%, and the dynamic viscosity was 5.4mm at 20°C 2 / s.

Embodiment 3

[0025] Raw materials: 250ml of waste cooking oil

[0026] Firstly, the waste catering oil is pretreated, that is, heated to 70°C, vacuum filtered to remove mechanical impurities, and then 50% phosphoric acid is added for pickling to remove phospholipids, spin separation, water washing, and dehydration with polyhydroxy absorbent resin. Then get methyl alcohol, its add-on is 35% of the waste oil weight after pretreatment, at temperature, be 50 ℃, adopt sodium methylate as basic catalyst, catalyst concentration is 1.3% relative to the weight of waste oil after treatment, and the reaction time is 90min In the case of two main products that will be generated: glycerin at the bottom and methyl ester at the upper layer, the two are separated by centrifugation, and then the methyl ester is purified: the methyl ester layer is washed with water to remove the residual catalyst, soap, Methanol, and other water-soluble components, methyl esters were further distilled under vacuum to obtain...

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Abstract

The invention provides a method of using waste fat to producing organism diesel oil. Take the waste fat as material, pre-process by removing the mechanical impurity, phosphatide and sterol and put the waste fat in the reactor, then add methanol and sodium methoxide catalyst. The percentage of the added sodium methoxide of the total weight in waste fat is 0.7~1.3%; the methanol's percentage is 15%~35%. The reaction temperature is controlled ranging from 30~60 Deg. C, and reaction time is 40~90 minutes. After reacting, water scrubbing methyl estor layer and drying, get the said organism diesel oil. The reaction lasts 2-3 hours and the convert rate is higher than 95%. The value of cetane is lager than 50.

Description

technical field [0001] The invention relates to a method for producing diesel oil, in particular to a method for producing biodiesel from waste oil. Background technique [0002] Biodiesel is widely used abroad. The United States is the first country to study biodiesel. Currently, there are 4 production plants with a total production capacity of 500,000 tons per year. In Europe, the production of biodiesel has also attracted much attention, and many countries have implemented a tax-free policy for biodiesel. Germany first formulated the biodiesel standard DINV52606. In 2004, its biodiesel production reached 1.4 million tons, and it has more than 300 biodiesel gas stations. In 2003, almost all car manufacturers in the world indicated that their cars were suitable for biodiesel. Currently, the goal of the EU to promote biodiesel is to reach an annual output of 8.3-10 million tons in 2010. [0003] The sources of waste oil such as catering in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G3/00
CPCY02E50/13Y02E50/10Y02P30/20
Inventor 陈冠益郑孟祥梅陈丽然李维尊于欣马文超
Owner TIANJIN UNIV
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