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Production method of biodiesel

A production method, biodiesel technology, applied in biofuels, petroleum industry, liquid carbon-containing fuels, etc., can solve the problems of long biodiesel production time, low product yield, long reaction time, etc.

Inactive Publication Date: 2015-07-15
HUNAN WEIMING CHUANGLIN BIOLOGICAL ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, whether liquid acid or solid acid is used to catalyze the production of biodiesel, there are some common problems: long reaction time (more than 3h), low product yield (less than 80%, no light fractions), and low acid value of reaction products. High (greater than 2mgKOH / g)
The high acid value of the product means that post-treatment is required to meet the national standard for biodiesel (<0.8mgKOH / g), which makes the production time of biodiesel longer

Method used

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  • Production method of biodiesel
  • Production method of biodiesel

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Catalytic distillation system: the trays of the plate tower are sieve trays, and the diameter of the tower is The number of trays is 30, the weir height is 15mm, and the opening ratio is 13%; there are grease inlets and methanol inlets arranged on the top of the tower, and methanol inlets are arranged on the bottom of the tower; a liquid sampling is arranged for every two layers of trays port; the reboiler is an electric heater; the split device is a solid-liquid separation device.

[0056] High temperature and high pressure reactor: inner diameter The length is 800mm, a built-in fluid distributor, and a liquid phase sampling port is arranged in the middle of the reactor.

[0057] The feed rate of cottonseed acidified oil with an acid value of 118.41mgKOH / g in the high-temperature and high-pressure reactor is 8.737mol / h, and the feed rate of methanol is 105mol / h; the feed rate of fresh methanol in the catalytic distillation tower is 26mol / h, and the cycle methanol T...

Embodiment 2

[0063] Catalytic distillation system: the trays of the plate tower are sieve trays, and the diameter of the tower is The number of trays is 30, the weir height is 15mm, and the opening ratio is 13%; there are grease inlets and methanol inlets arranged on the top of the tower, and methanol inlets are arranged on the bottom of the tower; a liquid sampling is arranged for every two layers of trays port; the reboiler is an electric heater; the split device is a solid-liquid separation device.

[0064] High temperature and high pressure reactor: inner diameter The length is 800mm, a built-in fluid distributor, and a liquid phase sampling port is arranged in the middle of the reactor.

[0065] The feed rate of rapeseed acidified oil with an acid value of 123.37mgKOH / g in the high-temperature and high-pressure reactor is 8.737mol / h, and the feed rate of methanol is 105mol / h; the feed rate of fresh methanol in the catalytic distillation tower is 26mol / h. The feed rate of methanol ...

Embodiment 3

[0069] Catalytic distillation system: the trays of the plate tower are sieve trays, and the diameter of the tower is The number of trays is 30, the weir height is 15mm, and the opening ratio is 13%; there are grease inlets and methanol inlets arranged on the top of the tower, and methanol inlets are arranged on the bottom of the tower; a liquid sampling is arranged for every two layers of trays port; the reboiler is an electric heater; the split device is a solid-liquid separation device.

[0070] High temperature and high pressure reactor: inner diameter The length is 800mm, a built-in fluid distributor, and a liquid phase sampling port is arranged in the middle of the reactor.

[0071] The feed rate of rapeseed acidified oil with an acid value of 123.37mgKOH / g in the high-temperature and high-pressure reactor is 8.737mol / h, and the feed rate of methanol is 105mol / h; the feed rate of fresh methanol in the catalytic distillation tower is 26mol / h. The feed rate of methanol ...

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Abstract

The invention provides a production method of biodiesel, which comprises the following steps: mixing inferior grease with first alcohol substances, and reacting under heating and pressurizing conditions, thus obtaining an intermediate product; providing a catalytic distillation tower system; mixing the intermediate product with an acid catalyst to obtain a mixture; and introducing the mixture through the top of the catalytic distillation tower, introducing second alcohol substances through the bottom of the catalytic distillation tower, heating until the second alcohol substances are vaporized, and reacting the intermediate product and the vaporized alcohol substances to obtain the biodiesel crude product. Compared with the prior art, the inferior grease, the acid catalyst and the vaporized alcohol substances on various tower plates are continually subjected to mass transfer and heat exchange under the action of air flows passing through the tower plates, thus being simultaneously subjected to catalytic reaction; due to vapor-liquid equilibrium action, a system with a higher alcohol-oil ratio is formed on the tower plates, thus improving the reaction conversion rate; and meanwhile, the rising vapor carries away the generated water from the system, so that deeper esterification reaction can be performed, thus reducing the acid value of the reaction product.

Description

technical field [0001] The invention belongs to the technical field of green and renewable energy, and in particular relates to a method for producing biodiesel. Background technique [0002] Biodiesel characterized by fatty acid methyl esters is a renewable energy source from vegetable or animal fats. Due to its extremely low sulfur and nitrogen content, the combustion process is environmentally friendly, so it is called green energy. Due to the large population in our country, oil must first ensure people's daily needs. The government has adopted an industrial support policy that does not compete with the people for food. Therefore, unusable waste oils such as hogwash oil, gutter oil, and waste catering oil are used as raw materials for production. Biodiesel is of great significance. [0003] Industrially, there are a lot of techniques for producing biodiesel using waste oils and fats, and concentrated sulfuric acid is often used as a catalyst. For example, the Chinese pa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G7/00C11C3/10C10L1/02
CPCY02E50/13Y02E50/10
Inventor 夏翠珍李党训李凌波王勤
Owner HUNAN WEIMING CHUANGLIN BIOLOGICAL ENERGY