Method for using waste oil and grease as raw material to prepare fatty acid methyl ester

A technology of fatty acid methyl ester and waste oil, which is applied in fatty acid esterification, fuel, petroleum industry and other directions, can solve the problem of cost competition in the preparation of immobilized lipase catalyst, and achieve the effects of lowering temperature, preventing saponification and reducing energy consumption

Inactive Publication Date: 2015-08-05
ZHEJIANG UNIV
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Problems solved by technology

However, the preparation cost of immobilized lipase catalyst cannot

Method used

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  • Method for using waste oil and grease as raw material to prepare fatty acid methyl ester
  • Method for using waste oil and grease as raw material to prepare fatty acid methyl ester
  • Method for using waste oil and grease as raw material to prepare fatty acid methyl ester

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Embodiment 1

[0072] 1. Raw material pretreatment: send the raw material oil with an acid value of 102mgKOH / g into the carburetor pool, and raise the temperature of the carburetor room to 60-80°C for 1 hour through the steam sent by the boiler system, and send the heated material through the feeding pump Put it into the separation tower and let it rest for 8 hours to drain the water impurities, and the water impurities will be reduced to below 3%, and the static temperature is kept at 40°C.

[0073] 2. Pre-esterification: Send 4500L of static oil into the pre-esterification reaction kettle through the pre-esterification feed pump, start stirring, and heat up while feeding. When feeding, when the liquid surface submerges the first stirring fin, start stirring, and open the steam valve of the pre-esterification kettle, and heat up while feeding, and the steam pressure is controlled at 0.4MPa. ℃, feed crude methanol gas, the flow rate is not lower than 450L / h. After passing methanol for 5 min...

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Abstract

The invention discloses a method for using waste oil and grease as raw material to prepare fatty acid methyl ester. The method mainly comprises the steps of raw material oil preprocessing, esterification workshop section, ester exchange, coarse methyl ester rectification, washing and glycerinum purification and recovery. The utilization rate of raw material oil is high, and the water and sediment content of raw material oil is not limited. The coarse alkyl ester rectification efficiency of a rectification system is improved by adding boric acid. On the premise that the raw material requirement is net and by the adoption of process treatment, the conversion rate of drainage oil and swill oil is 86-87%, the conversion rate of fatty acid is 92-93%, and the processing cost is low (700-800 yuan/ton). The method is suitable for industrial fatty acid methyl ester preparation.

Description

technical field [0001] The invention belongs to the field of fatty acid methyl ester (or biodiesel) preparation, and is a method for preparing fatty acid methyl ester using waste oil as raw material. Background technique [0002] Fatty acid methyl esters, in addition to being used as chemical intermediates to prepare fatty alcohols or environmentally friendly plasticizers, are currently mainly used as diesel additives and are familiar to people. Its raw materials are usually various types of waste oil, mainly waste oil from the catering industry. Due to the complexity of raw materials and the uncertainty of components, there are some problems in the industrial production of fatty acid methyl esters. For example, the use of waste oil to prepare methyl esters usually adopts a discontinuous preparation method. Methanol is fed in batches, and water cannot be discharged in time, which easily leads to saponification, so that alkyl esters cannot be obtained or the yield due to sap...

Claims

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Application Information

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IPC IPC(8): C11C3/04C11C3/10C10L1/02
CPCC11C3/04C10L1/02C10L2200/0484C10L2250/00C11C3/10
Inventor 张搏朱亮徐向阳
Owner ZHEJIANG UNIV
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