Complex acid catalyst for producing biodiesel from acidified oil and production method of biodiesel

A biodiesel, production method technology, applied in organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, chemical instruments and methods, etc. Large energy consumption and other problems, to achieve the effects of wide adaptability of raw materials, short reaction time, and low production energy consumption

Inactive Publication Date: 2011-01-26
上海绿铭环保科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The "two-step method" process has the disadvantages of lengthy production process, high production energy consumption, high production cost and easy saponification of transesterification reaction.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] 1. Add 100kg of soybean acidified oil (acid value 140mgKOH / g) into the reactor, add 3kg of composite acid catalyst (dissolved in 10kg of methanol in advance), and the composite acid catalyst according to concentrated sulfuric acid: concentrated phosphoric acid: linear alkylbenzenesulfonate Acid = mixed with a mass ratio of 4:1:1, 20kg of methanol was added, the reaction temperature was 72°C, the reaction was 6h, and the acid value was 1.1mgKOH / g;

[0012] 2. Recover excess methanol by distillation, add 2.0% to 10% sodium carbonate dilute solution to the product of step 1 to neutralize the composite acid catalyst, add 0.5% industrial salt solution, wash with water 2 to 3 times until neutral, and let stand to separate layer, the upper layer is fatty acid methyl ester, and the lower layer is glycerol saline;

[0013] 3. Drain the lower layer of glycerol brine, and enter the molecular distillation column after the upper layer of fatty acid methyl ester is flash dehydrated t...

Embodiment 2

[0015] 1. Add 100kg cottonseed acidified oil (acid value 120mgKOH / g) into the reaction kettle, add 4kg of composite acid catalyst (dissolved in 10kg methanol in advance), composite acid catalyst according to concentrated sulfuric acid: concentrated phosphoric acid: linear alkyl benzene sulfonate Acid = mixed with a mass ratio of 4:1:1, add 20kg of methanol, react at a temperature of 75°C, react for 6h, and the acid value is 1.2mgKOH / g;

[0016] 2. Recover excess methanol by distillation, add 2.0% to 10% sodium carbonate dilute solution to the product of step 1 to neutralize the composite acid catalyst, add 0.5% industrial salt solution, wash with water 2 to 3 times until neutral, and let stand to separate layer, the upper layer is fatty acid methyl ester, and the lower layer is glycerol saline;

[0017] 3. Drain the lower layer of glycerol brine, and enter the molecular distillation column after the upper layer of fatty acid methyl ester is flash dehydrated to obtain refined f...

Embodiment 3

[0019] 1, add 100kg soapstock acidified oil (acid value 160mgKOH / g) in reactor, add composite acid catalyst 3kg (dissolve in 10kg methanol in advance), composite acid catalyst according to concentrated sulfuric acid: concentrated phosphoric acid: linear alkylbenzene Sulfonic acid = 3:1:1 mass ratio mixed, add 20kg methanol, reaction temperature 71°C, react for 5h, the acid value is 0.9mgKOH / g;

[0020] 2. Recover excess methanol by distillation, add 2.0% to 10% sodium carbonate dilute solution to the product of step 1 to neutralize the composite acid catalyst, add 0.5% industrial salt solution, wash 2 to 3 times with water until neutral, and let stand to separate layer, the upper layer is fatty acid methyl ester, and the lower layer is glycerol saline;

[0021] 3. Drain the lower layer of glycerol brine, and enter the molecular distillation column after the upper layer of fatty acid methyl ester is flash dehydrated to obtain refined fatty acid methyl ester, i.e. 91.2 kg of bio...

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Abstract

The invention discloses a complex acid catalyst for producing biodiesel from acidified oil and a production method of the biodiesel. The method comprises the complex acid catalyst which comprises concentrated sulfuric acid, concentrated phosphoric acid and linear alkylbenzene sulfonic acid, and the method comprises the following steps: mixing the concentrated sulfuric acid, the concentrated phosphoric acid and the linear alkylbenzene sulfonic acid according to the weight ratio of 2-4: 1: 1; and dissolving the complex acid catalyst in methanol, adding into a reaction kettle, producing refined fatty acid methyl ester, namely the biodiesel, through three steps. The method for producing the biodiesel from the acidified oil by utilizing the complex acid catalyst has simple process, strong operability, low production energy consumption, high conversion rate of the biodiesel and improved economic benefits.

Description

technical field [0001] The invention relates to biodiesel, in particular to a method for producing biodiesel by using waste oil, in particular to a composite acid catalyst for producing biodiesel from acidified oil and a method for producing biodiesel. Background technique [0002] Biodiesel, also known as fatty acid methyl ester, is a new type of fuel produced by processing vegetable oil or animal oil. With the worldwide energy shortage and people's increasing emphasis on environmental protection, it is imminent to develop and research biodiesel, a green and environmentally friendly fuel, to replace the depleted petroleum energy. Waste oil mainly composed of animal and vegetable oils can be converted into biofuels for internal combustion engines after reaction modification. It is a clean renewable energy source and a typical "green energy source". Vigorously developing biodiesel has important strategic significance for sustainable economic development, promoting energy sub...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11C3/10C10L1/02B01J31/02
CPCY02E50/13Y02E50/10
Inventor 叶正尧杨建斌周位
Owner 上海绿铭环保科技股份有限公司
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