A continuous glycerin esterification acid reduction device

A glyceride and acid-reducing technology, applied in fatty acid esterification, organic chemistry, petroleum industry and other directions, can solve the problems of unfavorable continuous production, back-mixing of materials in the kettle, long residence time, etc., to avoid direct short-circuit, The effect of reducing back mixing and low acid value of the product

Active Publication Date: 2019-03-29
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN 105623861 A discloses a glycerol esterification reaction device, but the invention has a long residence time, which is not conducive to continuous production; Chinese patent CN 101575285 B discloses a process for continuous production of fatty acid glycerides and special equipment , but there are problems such as serious back-mixing of materials in the kettle, high acid value of the product (fatty acid content 3%-10%), large number of equipment, and large floor area

Method used

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  • A continuous glycerin esterification acid reduction device
  • A continuous glycerin esterification acid reduction device
  • A continuous glycerin esterification acid reduction device

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Such as figure 1 As shown, it is a device for a single glycerol esterification reaction tank 1, and three parallel baffles 12 are arranged in the glycerin esterification reaction tank 1, and the glycerin esterification reaction tank 1 has 4 compartments respectively, and the first compartment is respectively A, the second compartment B, the third compartment C, the fourth compartment D, the discharge pipe at the bottom of each compartment is divided into two paths, the discharge pipe at the bottom of the first compartment A passes through the first circulating pump 4, The heater 2 is connected to the feed inlet at the top of the first compartment A to form an internal circulation of the feed liquid in the first compartment A, and the outlet pipe at the bottom of the first compartment A passes through the first branch pipe A1 and the second compartment The discharge pipe at the bottom of B is connected, and the third valve c is arranged on the first branch pipe A1; the d...

Embodiment 2

[0042] Such as figure 2 As shown, the continuous glycerol esterification acid reduction device of this embodiment is operated in series by two glycerol esterification reaction tanks 1, and the baffles 12 in each glycerol esterification reaction tank 1 are distributed as follows Figure 4 As shown, the glycerol esterification reaction tank 1 is divided into four compartments by three baffles 12, forming a continuous glycerin esterification acid reduction device with eight kettles connected in series. The first glycerol esterification reaction tank 1 The reaction product material at the outlet port enters the heater 2 from the feed pipe of the second glycerin esterification reaction tank 1 to be heated, and then enters the compartment of the second glycerin esterification reaction tank 1 to continue the reaction. The two glycerin esterification reaction tanks 1. The gas outlets on the top are respectively connected to the respective condensers 8 through pipelines. After the gas...

Embodiment 3

[0044] Such as image 3 As shown, in this embodiment, two glycerol esterification reaction tanks 1 work in parallel, and each glycerin esterification reaction tank 1 is composed of four compartments to form a four-tank series reactor, and then two sets of four-tank series reactors are connected in parallel to form A continuous glycerol esterification acid-reducing device has been established. The raw materials are preheated by the preheating reactor 3 and then divided into two routes. One route enters the first glycerin esterification reaction tank 1 for reaction, and the other route enters the second glycerin esterification reaction tank. Tank 1 reaction, the reaction of each glycerol esterification reaction tank 1 is the same as that of the single glycerol esterification reaction tank 1 in Example 1, which is applicable to the working conditions of mass production.

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Abstract

The invention relates to a continuous glycerol esterification and deacidification device. The device comprises a glycerol esterification reaction tank, a heater, a raw material pre-heater and the like, wherein the glycerol esterification reaction tank is internally divided into a plurality of compartments through baffle plates; an internal cycle is formed among the first compartment, circulating pumps and the heater; a raw material feeding pipeline with a raw material pre-heater is connected between the heater and the circulating pump through a pipeline; bottom outlets of the middle compartments are connected with the circulating pumps respectively; outlets of the circulating pumps are connected with top inlets of the middle compartments respectively; the bottom outlet of the final compartment is connected with a circulating pump and a product discharging pipeline; the outlet of the circulating pump is connected with the top inlet of the final compartment; the bottom outlets of the compartments are connected through a pipeline with a valve in sequence. According to the continuous glycerol esterification and deacidification device provided by the invention, the baffle plates are arranged and the circulating pumps are combined to use; multi-kettle serial connection continuous glycerol esterification and deacidification reaction in one reaction tank is realized by utilizing a communicating vessel principle; the device has the advantages of few equipment quantity, small occupied area, controllable staying time, low acid value of a product, small heat loss, benefits to industrialized production and the like.

Description

technical field [0001] The invention relates to the technical field of biodiesel production devices, in particular to a continuous glycerol esterification acid reduction device, which is especially suitable for the industrial production of biodiesel from waste oil. Background technique [0002] At present, the industrial production of biodiesel mostly adopts an acid-base two-step method. However, the first step of the sulfuric acid-catalyzed esterification method generally has problems such as sulfuric acid wastewater and incomplete acid reduction. The biggest advantage of glycerol esterification instead of sulfuric acid catalytic esterification to produce biodiesel is that there is no sulfuric acid wastewater, complete acid reduction, and glycerol can be recycled as both a reactant and a by-product. Chinese patent CN 105623861 A discloses a glycerol esterification reaction device, but the invention has a long residence time, which is not conducive to continuous production; ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C67/00
CPCC10L1/02C11C3/06
Inventor 聂勇梁晓江夏凡解庆龙卢美贞计建炳
Owner ZHEJIANG UNIV OF TECH
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