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Alkyl fatty ester preparing process

A technology of fatty acid alkyl esters and manufacturing methods, which is applied in the field of fatty acid alkyl esters, can solve the problems of oil raw materials that are difficult to correspond to the range of acid value fluctuations, high wastewater treatment costs, and low production efficiency, so as to solve the problem of sewage discharge and save operation The effect of cost and process simplification

Inactive Publication Date: 2006-08-02
上海日器环保设备工程有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the main problem of the washing and refining method is that the waste water treatment cost is high and the production efficiency is low, while the main problem of the distillation and refining method is that the equipment cost is high and the energy consumption is high.
[0036] (4) Among the several production processes that have been disclosed so far, no matter which production process is used, it is difficult to cope with the oil raw materials with large acid value fluctuations without changing the process parameters

Method used

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  • Alkyl fatty ester preparing process
  • Alkyl fatty ester preparing process
  • Alkyl fatty ester preparing process

Examples

Experimental program
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Effect test

Embodiment 1

[0118] Using dehydrated waste cooking oil (moisture 450ppm, acid value 98mg-KOH / g) under the condition of 90°C and 5mmHg as raw material, according to figure 1 The technological process produced fatty acid methyl ester. The detailed description of the preparation process is as follows:

[0119] Above-mentioned waste edible oil 100kg is packed in the retort of band stirrer and electric heater, and add in retort, calculate by calculation formula 1, purity is 99.8% methyl alcohol 56.6kg (F 1 =10) and the concentration calculated by calculation formula 2 is 95% sulfuric acid catalyst 1kg (F 2 =0.056), and stirred at 65° C. for 120 minutes to obtain a pre-esterification reaction product. Adding in the esterification reaction product then is that the potassium hydroxide 1.8kg (F 4 =0.2), and stirred at 65° C. for 30 minutes to obtain a transesterification reaction product. The transesterification reaction product was put into an evaporating tank equipped with a stirrer, and the ...

Embodiment 2

[0121] Using dehydrated waste cooking oil (moisture 450ppm, acid value 98mg-KOH / g) under the condition of 90°C and 5mmHg as raw material, according to figure 2 The technological process produced fatty acid methyl ester. The detailed description of the preparation process is as follows:

[0122] Above-mentioned waste cooking oil 100kg is packed in the retort of band stirrer and electric heater, and in retort, add calculates by calculation formula 1, and purity is 99.8% methyl alcohol 56.6kg (F 1 =10) and the concentration calculated by calculation formula 2 is the amount 1kg (F of the sulfuric acid catalyst of 95%) 2 =0.056), and stirred at 65° C. for 120 minutes to obtain a pre-esterification reaction product. Then add 21kg of crude glycerin (composition: KOH 5%, glycerol 48%, moisture 2%, other 45%) containing alkali catalyst to the esterification reaction product, and stir for 5 minutes under the condition of 65 ℃ to obtain the mixed mixture A. Put it into an evaporating...

Embodiment 3

[0124] The used raw material grease of embodiment 3, low carbon alcohol, alkali catalyst and acid catalyst are the same as embodiment 1. The process of producing fatty acid methyl esters from raw oils and fats is basically the same as in Example 1, except that after the chemical treatment, 5% water equivalent to the volume of the solution was added to solution 1 and stirred for 5 minutes. The rest time after chemical treatment was 30 minutes. In addition, after the sludge was separated and removed, the solution was further vacuum-dried and dehydrated at 90° C. and 5 mmHg for 30 minutes to finally obtain the fatty acid methyl ester product. The properties analysis results of fatty acid methyl esters are shown in Table 1. As shown in Table 1, by adding water after the chemical treatment, although the static separation time is only 30 minutes, the impurity content in the product is lower than that obtained in Example 1.

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Abstract

The process of producing alkyl fatty ester with oil containing free fatty acid as material includes the main steps of: adding lower alcohol and acid catalyst in the amount calculated based on the acid value of oil material into the oil material for pre-esterification; adding lower alcohol and alkali catalyst in the amount calculated based on the acid value of oil material into the pre-esterification product for ester exchange reaction; separating un-reacted lower alcohol from the ester exchange reaction product and eliminating glycerin to obtain crude alkyl fatty ester product; adding one kind of special treating agent to the crude alkyl fatty ester product for chemical treatment and separating and eliminating chemically produced sludge to obtain refined alkyl fatty ester product. The process can produce alkyl fatty ester product with stable quality with oil material in different acid values.

Description

technical field [0001] The invention relates to a method for producing fatty acid alkyl esters from oil containing free fatty acids. More specifically, the present invention relates to a method for producing fatty acid alkyl esters that can replace petroleum diesel, chemical and chemical raw materials and chemical products using oils containing free fatty acids as raw materials. Background technique [0002] Humans have known for a long time that in the presence of catalysts, vegetable oils or animal oils can be transesterified with low-carbon alcohols such as methanol, ethanol, propanol, etc., and triglycerides, diglycerides, and glycerol in oils can be converted into Monoesters are converted to fatty acid alkyl esters (Chemical Formula 1). In the past, fatty acid alkyl esters produced by this reaction were mainly used as raw materials and chemical products in the oleochemical industry. In recent years, due to the protection of the earth's environment and the need for new...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/08
Inventor 王祥生
Owner 上海日器环保设备工程有限公司
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