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Biodiesel esterification method

A biodiesel and esterification technology, which is applied in the fields of biofuel, fatty acid esterification, petroleum industry, etc., can solve the problems of high investment required for the project, large consumption of rectification, large loss of methanol, etc., and achieves high mixing efficiency and methanol. The effect of high content and small distillation loss

Inactive Publication Date: 2017-02-22
SICHUAN LANBANG NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the waste liquid contains a large amount of sulfuric acid or phosphoric acid, which belongs to hazardous waste water, the treatment is difficult and the consumption is high. At the same time, the existence of sulfuric acid in the whole process leads to high equipment requirements. The storage tanks need to be made of stainless steel, and the pumps need to use magnetic pumps. It leads to high investment required for the project; the methanol obtained by rectification is acidic and is not suitable for transesterification reaction. The concentration of methanol during rectification is low, the consumption of rectification is large, and the loss of methanol is large. Generally speaking, rectification wastewater contains 5~ 7% methanol

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1: A biodiesel esterification method includes circulation mixing and gas treatment.

[0033] Described gas treatment comprises the following steps:

[0034] ① Gas alkalization: Spray the gas with potassium hydroxide solution to make the gas pH ≥ 9;

[0035] ②Condensation: the alkalized gas is condensed and enters the storage tank;

[0036] ③Batching: The liquid in the storage tank enters the batching tank to mix with sodium hydroxide and potassium hydroxide to get the circulating lye, and the pH of the circulating lye is ≥ 10;

[0037] ④Circulation: use circulating lye to replace the original lye in step ① and repeat steps ①—③1 time;

[0038] ⑤ Methanol rectification: After one cycle, when the methanol content in the storage tank liquid is ≥ 65wt%, methanol rectification is performed on the storage tank liquid to obtain methanol and wastewater.

[0039] Described circulation mixing comprises the following steps:

[0040] aHydraulic cavitation: Use a pump ...

Embodiment 2

[0045] Embodiment 2: a kind of biodiesel esterification method comprises circulation mixing and gas treatment.

[0046] Described gas treatment comprises the following steps:

[0047] ① Gas alkalization: Spray the gas with a mixture of potassium hydroxide solution and potassium hydroxide solution to make the gas pH ≥ 9;

[0048] ②Condensation: the alkalized gas is condensed and enters the storage tank;

[0049] ③Batching: the liquid in the storage tank enters the batching tank and mixes with sodium hydroxide to get the circulating lye, and the pH of the circulating lye is ≥ 10;

[0050] ④ circulation: adopt circulating lye to replace the original lye in step ① and repeat steps ①—③ 3 times;

[0051] ⑤ Methanol rectification: After 3 cycles, when the methanol content in the storage tank liquid is ≥ 75wt%, methanol rectification is performed on the storage tank liquid to obtain methanol and wastewater.

[0052] Described circulation mixing comprises the following steps:

[00...

Embodiment 3

[0058]Embodiment 3: A biodiesel esterification method includes circulation mixing and gas treatment.

[0059] Described gas treatment comprises the following steps:

[0060] ① Gas alkalization: Spray the gas with sodium hydroxide solution to make the gas pH ≥ 9;

[0061] ②Condensation: the alkalized gas is condensed and enters the storage tank;

[0062] ③Batching: the liquid in the storage tank enters the batching tank and mixes with sodium hydroxide to get the circulating lye, and the pH of the circulating lye is ≥ 10;

[0063] ④ circulation: adopt circulating lye to replace the original lye in step ① and repeat steps ①—③ multiple times;

[0064] ⑤ Methanol rectification: After multiple cycles, when the methanol content in the storage tank liquid is ≥ 75wt%, methanol rectification is performed on the storage tank liquid to obtain methanol and wastewater.

[0065] Described circulation mixing comprises the following steps:

[0066] aHydraulic cavitation: Use a pump with a ...

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PUM

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Abstract

The invention relates to the field of biodiesel, in particular to a biodiesel esterification method. The method comprises the steps of gas treating and cyclic mixing. Gas which is originally acidic in an esterification reaction is treated with alkaline liquor, proceeding of the esterification reaction is effectively promoted through multiple mixing effects, therefore, the esterification reaction time can be effectively shortened, and then the biodiesel preparation cycle can be shortened; in addition, pollution can be reduced, the cost can be reduced, and the methanol recycling rate can be increased.

Description

technical field [0001] The invention relates to the field of biodiesel, in particular to an esterification method of biodiesel. Background technique [0002] Biodiesel is a clean and renewable energy source. It is a kind of diesel (liquid fuel) processed from biomass resources as the raw material. The main chemical component is fatty acid methyl ester. Specifically, animal and vegetable oils, such as rapeseed oil, soybean oil, peanut oil, corn oil, rice bran oil, cottonseed oil; and acidified oils and fatty acids from animal and vegetable oil leftovers; animal oils: lard oil, chicken oil, duck oil, animal bone oil After a series of chemical transformations, the refined liquid fuel is a high-quality substitute for petroleum diesel. Biodiesel is a typical "green energy". Vigorously developing biodiesel is of great strategic significance to sustainable economic development, promotion of energy substitution, reduction of environmental pressure, and control of urban air pollutio...

Claims

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Application Information

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IPC IPC(8): C11C3/04C10L1/02
CPCC10L1/02C11C3/04Y02E50/10
Inventor 陈波
Owner SICHUAN LANBANG NEW ENERGY TECH CO LTD
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