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Method for preparing biodiesel by utilizing food waste recycling oil

A technology for biodiesel and kitchen waste, applied in the fields of biofuel, fat oil/fat refining, petroleum industry, etc., can solve the problems of inability to form industrial applications, discharge of waste lye or waste acid, and difficult recovery of esterification products. , to alleviate the energy and environmental crisis, reduce pollution, reduce food safety hazards

Active Publication Date: 2010-12-08
北京昊业怡生科技有限公司
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Problems solved by technology

[0003] At present, there are four mature processes for biodiesel production at home and abroad: alkali catalysis, acid catalysis, and lipase. In addition, bioenzyme and supercritical extraction are still unable to form industrial applications due to the cost of catalysts and equipment.
Acid-base catalysis (chemical method) is the main method for industrial production of biodiesel, but there are disadvantages such as complicated process, high energy consumption, waste lye or waste acid discharge in the production process, and difficult recovery of esterification products.

Method used

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  • Method for preparing biodiesel by utilizing food waste recycling oil

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[0021] Step 1, pretreatment: The colloids and impurities in the waste catering oil produced after the kitchen waste is processed by the oil-water separator will affect the efficiency of the subsequent acid-catalyzed esterification and alkali-catalyzed transesterification reactions, so the waste catering oil must be treated first Degumming and impurity removal treatment. The present invention adopts the hydration degumming and impurity removal method, and the specific operation process is as follows: 3% tap water of its volume is added to the waste catering oil and heated to 90-100°C. And slowly add 1.5% of waste catering oil weight, the concentrated sulfuric acid of mass concentration 98% in above-mentioned mixed solution, leave standstill 30 minutes after stirring for 10 minutes, oil and glue, impurity can be separated, and the upper layer is oil (hereinafter referred to as raw material Oil), the lower layer is colloid and impurities. The raw material oil in the upper layer ...

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Abstract

The invention relates to a method for preparing biodiesel by utilizing food waste low-cost high-efficiency recycling oil, which is realized by four steps of dining waste oil degumming and impurity removing treatment, acid catalytic esterification reaction, base catalytic transesterification reaction and biodiesel refining. The final product is colourless biodiesel, and all performance indexes can reach the European and American biodiesel quality standard. The invention has the advantages of low production cost, high conversion rate and less pollutant discharge and overcomes the defect of preparation by a single method. When the biodiesel is produced, by-products comprise glycerol and methanol.

Description

technical field [0001] The invention relates to a method for preparing biodiesel, in particular to a method for preparing biodiesel by using low-cost recovered oil from kitchen waste. Background technique [0002] In recent years, the shortage of traditional non-renewable energy such as petroleum has become increasingly prominent, and the problem of energy shortage has become a major issue affecting the economy and national security. At the same time, the problem of environmental pollution caused by the use of petroleum fuels has become increasingly prominent, and the development of new clean alternative energy has become the focus of research in countries all over the world. Biodiesel is a petrochemical diesel substitute prepared from animal and vegetable oils and low-carbon fatty alcohols through transesterification. The main component is long-chain fatty acid monoester (methyl ester or ethyl ester), which is non-toxic and biodegradable It is an important renewable and cl...

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Application Information

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IPC IPC(8): C11C3/04C11C3/10C10L1/02C11B3/00C11B3/04
CPCY02E50/13Y02E50/10
Inventor 田丹于景成靳国良丁雪梅于勇勇桑立维田艺伟
Owner 北京昊业怡生科技有限公司
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