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

A biodiesel and continuous method technology, which is applied in the system field of variable temperature-continuous method to prepare biodiesel and variable temperature-continuous method to prepare biodiesel, can solve the problem that the sediment device cannot operate stably for a long period of time, and achieves the reaction conversion rate and Product yield, high reaction conversion and effect of product yield

Active Publication Date: 2021-10-08
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 method

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Experimental program
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Effect test

Embodiment 1

[0095] The waste oil and methanol were respectively charged at a rate of 120 g / h and 35 g / h, and the liquid hourly volume space velocity was 1h. -1 , continuously provided to the first tank reactor with stirring, the temperature of the first tank reactor is 130 ℃, the pressure is 5Mpa, the first material after the reaction escapes from the upper part of the first tank reactor and enters the static Put the tank to stand, and the material obtained from the top of the standing tank that has removed the precipitate enters the second tank reactor I with stirring, and the temperature of the second tank reactor I is 190 ° C, and the added methanol The volume is 8 g / hour, and the liquid hourly volume space velocity is 1h -1 , the reacted material is drawn out from the top of the second tank reactor I, enters the standing tank for standing, and the material obtained from the top of the standing tank with the sediment removed enters the second tank reactor II with stirring , the temper...

Embodiment 2

[0101] The waste oil and methanol were respectively charged at a rate of 120 g / h and 42 g / h, and the liquid hourly volume space velocity was 1h. -1 , continuously provided to the first tank reactor with stirring, the temperature of the first tank reactor is 140 ℃, the pressure is 5Mpa, the first material after the reaction escapes from the upper part of the first tank reactor and enters the static Put the tank to stand, and the material obtained from the top of the standing tank that has removed the precipitate enters the second tank reactor I with stirring, and the temperature of the second tank reactor I is 190 ° C, and the added methanol The volume is 9 g / h, and the liquid hourly volume space velocity is 1h -1 , the reacted material is drawn out from the top of the second tank reactor I, enters the standing tank for standing, and the material obtained from the top of the standing tank with the sediment removed enters the second tank reactor II with stirring , the temperatu...

Embodiment 3

[0104] The acidified oil and methanol were 120 g / h and 32 g / h respectively, and the liquid hourly volume space velocity was 0.7h -1 , continuously provided to the first tank reactor with stirring, the temperature of the first tank reactor is 120 ℃, the pressure is 4.6Mpa, the first material after the reaction escapes from the upper part of the first tank reactor and enters Carry out standstill in the standstill tank, and the material obtained from the top of the standstill tank that has removed the precipitate enters the second tank reactor I with stirring, and the temperature of the second tank reactor I is 170° C. The amount of methanol is 14 g / h, and the liquid hourly volume space velocity is 0.7 h -1 , the reacted material is drawn out from the top of the second tank reactor I, enters the standing tank for standing, and the material obtained from the top of the standing tank with the sediment removed enters the second tank reactor II with stirring , the temperature of the...

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Abstract

The invention relates to the field of biodiesel preparation, and discloses a method and system for preparing biodiesel by a variable temperature-continuous method. The method includes: directly introducing raw materials containing oil and alcohol into a first reactor, and reacting under stirring, by The first reactor obtains the first material, and the first reactor is a tank reactor or a tubular reactor; the first material is introduced into one or at least two second tank reactors connected in series for reaction, and finally A second material is obtained from the upper part of a second tank reactor; the second material is sequentially subjected to monohydric alcohol removal treatment and separation treatment of ester phase and glycerin. The method for preparing biodiesel by variable temperature-continuous method provided by the present invention directly introduces the raw material containing oil and alcohol into the first reactor for reaction without going through conventional raw material preheater or heater, which can avoid the A defect that causes deposits to accumulate in the high-pressure heater and prevent the device from operating stably for a long period of time.

Description

technical field [0001] The invention relates to the field of preparation of biodiesel, 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 obtained by transesterification of oil and methanol, which refers to the transesterification of triglycerides with another alcohol (usually a low-carbon alcohol, such as C 1 -C 8 of the monohydric alcohol). Among the products of the transesterification reaction, fatty acid esters are biodiesel, monoglycerides, diglycerides, glycerol, alcohols and triglycerides are the raw materials. The preparation methods of biodiesel can be divided into acid catalysis method, alkali catalysis method, enzyme catalysis method and supercritical method. [0003] CN1412278A discloses an acid catalysis method, a method for preparing biodiesel from waste animal and vegetable oils with high...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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