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Method and system for preparing biodiesel by variable temperature-continuous process

A technology of biodiesel and continuous method, which is applied in the field of biodiesel preparation by variable temperature-continuous method, and the system field of biodiesel preparation by variable temperature-continuous method. Product Yield, High Reaction Conversion, and Effect of Product Yield

Active Publication Date: 2018-12-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] One of the purposes of the present invention is to overcome the defect that the method of the prior art will cause deposits to accumulate in the high-pressure heater when preheating the raw materials for preparing biodiesel, so that the device cannot run stably for a long period of time

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  • Method and system for preparing biodiesel by variable temperature-continuous process

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Effect test

Embodiment 1

[0095] Use waste oil and methanol at a rate of 120 g / h and 35 g / h respectively, and the liquid hourly volume space velocity is 1h -1 , continuously supplied to the first tank reactor with stirring, the temperature of the first tank reactor is 130°C, the pressure is 5Mpa, and the first material after the reaction escapes from the upper part of the first tank reactor into the static Put it in the tank and let it stand still. The material obtained from the upper part of the standing tank and removed the sediment enters the second tank reactor I with stirring. The temperature of the second tank reactor I is 190 ° C. The added methanol The volume is 8 grams / hour, and the liquid hourly volume space velocity is 1h -1 , the reacted material is drawn from the upper part of the second tank reactor I, enters the static tank for standing, and the material obtained from the upper part of the static tank from which the sediment has been removed enters the second tank reactor II with stirrin...

Embodiment 2

[0101] The waste oil and methanol are respectively fed at a rate of 120 g / h and 42 g / h, and the liquid hourly volume space velocity is 1h -1 , continuously supplied to the first tank reactor with stirring, the temperature of the first tank reactor is 140 ° C, the pressure is 5Mpa, the first material after the reaction escapes from the upper part of the first tank reactor into the static Put it in the tank and let it stand still. The material obtained from the upper part of the standing tank and removed the sediment enters the second tank reactor I with stirring. The temperature of the second tank reactor I is 190 ° C. The added methanol The volume is 9 grams / hour, and the liquid hourly volume space velocity is 1h -1 , the reacted material is drawn from the upper part of the second tank reactor I, enters the static tank for standing, and the material obtained from the upper part of the static tank from which the sediment has been removed enters the second tank reactor II with s...

Embodiment 3

[0104] The acidified oil and methanol are respectively fed at a rate of 120 g / h and 32 g / h, and the liquid hourly volume space velocity is 0.7h -1 , continuously supplied to the first tank reactor with stirring, the temperature of the first tank reactor is 120°C, the pressure is 4.6Mpa, the first material after the reaction escapes from the upper part of the first tank reactor and enters Stand still in the static tank, the material obtained from the upper part of the static tank from which the sediment has been removed enters the second tank reactor I with stirring, the temperature of the second tank reactor I is 170 ° C, and the added The amount of methanol is 14 g / hour, and the liquid hourly volume space velocity is 0.7h -1 , the reacted material is drawn from the upper part of the second tank reactor I, enters the static tank for standing, and the material obtained from the upper part of the static tank from which the sediment has been removed enters the second tank reactor...

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Abstract

The invention relates to the field of preparation of biodiesel, and discloses a method and system for preparing the biodiesel by a variable temperature-continuous process. The method comprises the following steps: directly introducing raw materials containing grease and an alcohol into a first reactor, and performing a reaction under stirring to obtain a first material from the first reactor, wherein the first reactor is a tank reactor or a tubular reactor; introducing the first material into one or at least two second tank reactors connected in series, performing a reaction to obtain a secondmaterial from the upper part of a last second tank reactor; and performing monohydric-alcohol removing treatment on the second material, and performing separation treatment of an ester phase and glycerin. According to the method for preparing the biodiesel by the variable temperature-continuous process provided by the invention, the raw materials containing the grease and the alcohol are introduced into the first reactor for a reaction without passing through a conventional raw material preheater or heater, so that the defect that a device cannot stably operate for a long period of time due to accumulation of sediments in a high-pressure heater during preheating can be avoided.

Description

technical field [0001] The invention relates to the field of biodiesel preparation, in particular to a method for preparing biodiesel by a variable temperature-continuous method and a system for preparing biodiesel by a variable temperature-continuous method. Background technique [0002] Biodiesel can be produced by transesterification of oil and methanol, which refers to the exchange of triglycerides with another alcohol (usually a low-carbon alcohol, such as C 1 -C 8 monohydric alcohol) reaction. Among the products of transesterification, fatty acid esters are biodiesel, monoglycerides, diglycerides, glycerin, alcohol and triglycerides are raw materials. The preparation methods of biodiesel can be divided into acid catalysis, base catalysis, enzyme catalysis and supercritical method. [0003] Disclosed in CN1412278A is a kind of acid catalysis method, the method for preparing biodiesel with high acid value waste animal and vegetable oil, it uses sulfuric acid as cataly...

Claims

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Application Information

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IPC IPC(8): C11C3/00C11C3/10C10L1/02
CPCC10L1/02C11C3/003C11C3/10Y02E50/10
Inventor 王海京杜泽学高国强
Owner CHINA PETROLEUM & CHEM CORP
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