Green production process of biodiesel

A technology for green production and biodiesel, which is applied in the fields of biofuel, petroleum industry, fatty acid production, etc., can solve the problems of acid residue water treatment difficulty, reduce glycerol purity, and high processing cost, so as to reduce environmental protection pressure, reduce production cost, and reduce The effect of production pressure

Active Publication Date: 2020-04-17
浙江卓尚环保能源有限公司
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large amount of acid residue water will be produced during the esterification process. The acid residue water components are water, sulfuric acid and acidified oil (accounting for about 6% of the weight of the raw oil). Such acid residue water is difficult to treat and the treatment cost is high. Acid slag water will take out some oil raw materials, resulting in waste of raw materials
During the transesterification process, part of the oil is saponified under alkaline conditions, and the saponified oil is mixed with glycerin to reduce the purity of glycerin, and at the same time, it will cause the oil (about 3% of the weight of the raw oil) to be wasted

Method used

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  • Green production process of biodiesel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as figure 1 A kind of green production technology of biodiesel shown, comprises the steps:

[0034] (1) Pre-esterification: input methanol, concentrated sulfuric acid (98% sulfuric acid, commercially available) and waste oil (waste oil) into the reactor in sequence. , Blow the waste oil remaining in the pipeline into the reactor with compressed air to avoid clogging the pipeline; control the oil temperature in the reactor at 60°C, react at low temperature for 130 minutes, let it stand for 30 minutes, open the valve at the bottom of the reactor to discharge the acid slag water, collect The acid slag water enters the acid slag water storage tank; the consumption of this step methanol is 18% of the waste oil weight, and the consumption of the concentrated sulfuric acid is 0.3% of the waste oil weight;

[0035] (2) Esterification reaction: raise the temperature of the oil in the reactor to 100°C, start to supply methanol to the reactor under agitation, control the flo...

Embodiment 2

[0044] Such as figure 1 A kind of green production technology of biodiesel shown, comprises the steps:

[0045] (1) Pre-esterification: input methanol, concentrated sulfuric acid (98% sulfuric acid, commercially available) and waste oil (waste oil) into the reactor in sequence. , Blow the waste oil remaining in the pipeline into the reactor with compressed air to avoid clogging the pipeline; control the oil temperature in the reactor at 65°C, react at low temperature for 110 minutes, let it stand for 40 minutes, open the valve at the bottom of the reactor to discharge the acid slag water, collect The acid slag water enters the acid slag water storage tank; the consumption of this step methanol is 20% of the waste oil weight, and the consumption of the concentrated sulfuric acid is 0.8% of the waste oil weight;

[0046] (2) Esterification reaction: raise the temperature of the oil in the reactor to 105°C, start to supply methanol to the reactor under agitation, control the flo...

Embodiment 3

[0055] Such as figure 1 A kind of green production technology of biodiesel shown, comprises the steps:

[0056] (1) Pre-esterification: input methanol, concentrated sulfuric acid (98% sulfuric acid, commercially available) and waste oil (waste oil) into the reactor in sequence. , Blow the waste oil remaining in the pipeline into the reactor with compressed air to avoid clogging the pipeline; control the oil temperature in the reactor at 62°C, react at low temperature for 120 minutes, let it stand for 35 minutes, open the valve at the bottom of the reactor to discharge the acid slag water, collect The acid slag water enters the acid slag water storage tank; the consumption of this step methanol is 19% of the waste oil weight, and the consumption of the concentrated sulfuric acid is 0.5% of the waste oil weight;

[0057] (2) Esterification reaction: raise the temperature of the oil in the reactor to 100°C, start to supply methanol to the reactor under agitation, control the flo...

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Abstract

The invention discloses a green production process of biodiesel. The green production process comprises the following steps: (1) pre-esterification; (2) an esterification reaction; (3) an ester exchange reaction; (4) flash evaporation for dealcoholization; (5) washing; (6) deodorizing; and (7) distilling: conveying acid sludge water and crude glycerol into a neutralization kettle for a neutralization reaction, evaporating out methanol after the neutralization reaction is completed, feeding evaporated methanol into a methanol rectifying tower, adding concentrated sulfuric acid to adjust a pH value of a neutralized product having undergone methanol removal to 6-6.5, carrying out standing for layering, allowing glycerin at a lower layer to enter a glycerin storage tank, and allowing acidifiedoil at an upper layer to enter a waste oil storage tank and to be reused as a raw material. According to the method, impurities in the raw materials can be effectively removed, the production pressure of a subsequent process is reduced, product quality is improved, acid the sludge water and saponified grease can be recycled, and environmental protection pressure and production cost are reduced.

Description

technical field [0001] The invention relates to the technical field of biodiesel production, in particular to a green biodiesel production process. Background technique [0002] Biodiesel refers to vegetable oil (such as rapeseed oil, soybean oil, peanut oil, corn oil, cottonseed oil, etc.), animal oil (such as fish oil, lard, tallow, sheep oil, etc.), waste oil or microbial oil and methanol or ethanol Fatty acid methyl or ethyl esters formed by ester conversion. Biodiesel is a typical "green energy", which has the characteristics of good environmental performance, good engine start performance, good fuel performance, wide source of raw materials, and renewable properties. Vigorously developing biodiesel has important strategic significance for sustainable economic development, promoting energy substitution, reducing environmental pressure, and controlling urban air pollution. [0003] Many studies in recent years have confirmed that whether it is a small, light-duty diese...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/02C11C3/04C11C3/10C11C1/08C11C1/10
CPCC10L1/02C11C3/003C11C3/04C11C3/10C11C1/08C11C1/10Y02E50/10
Inventor 刘影赵伟鹏於慧娜路雪茹张玉红潘群忠姚汉良
Owner 浙江卓尚环保能源有限公司
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