Low energy consumption production method of biological diesel oil

A technology of biodiesel and low energy consumption, which is applied to the preparation of biological raw materials, biofuels, and liquid hydrocarbon mixtures. It can solve the problems of high equipment requirements, large esterification wastewater, and long reaction time, and achieve low requirements for reaction conditions. Energy consumption and the effect of saving water washing process

Inactive Publication Date: 2007-07-04
黄晓琳 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In the disclosed technology, as described in CN 1190471C, lipase is applied to the preparation of biodiesel, which has high activity for transesterification reaction, and the reaction conditions are mild, but it is difficult to recycle lipase, and the enzyme is very easy to lose Live, the reaction time is too long, it is difficult to apply to industrial production
Described in CN 1238468C, is a kind of method that utilizes homogeneous acid-base catalyst to catalyze the production of biodiesel, it does not

Method used

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  • Low energy consumption production method of biological diesel oil
  • Low energy consumption production method of biological diesel oil
  • Low energy consumption production method of biological diesel oil

Examples

Experimental program
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Example

[0033] example 1:

[0034] A. Preparation stage

[0035] A-1. Pretreatment of waste edible oil

[0036] A-1-1. Pretreatment of waste edible oil Put 1 mole of waste edible oil (the molecular weight of waste edible oil is determined to be 900g / mol, density is 0.926g / ml), 45g quicklime is placed in the pretreatment chamber, heated and stirred Deacidification, degumming and dehydration of waste edible oil for 15-30 minutes; reaction temperature is 343-373K;

[0037] A-1-2. Filter the residue of the above reaction;

[0038] A-2. Preparation of porous composite catalyst

[0039] A-2-1. Combine CaO: CaCO 3 The molar ratio of :NaOH:clay is 3:1:3:3 into the catalyst synthesis tank;

[0040] A-2-2. Calcined and pressed into a porous composite catalyst; the calcination temperature is 1073~1473K; the calcination time is 20~30min;

[0041] B. The reaction of bio-oils and short-chain alcohols

[0042] B-1. In the first stage of transesterification, the pretreated waste edible oil is pumped into...

Example

[0049] Example 2:

[0050] A. Preparation stage

[0051] A-1. Pretreatment of rapeseed oil

[0052]A-1-1. Pretreatment of rapeseed oil Put 1 mole of rapeseed oil (the molecular weight of waste edible oil is 882g / mol and the density is 0.906g / ml), 12g quicklime is placed in the pretreatment chamber, heated and stirred Deacidification, degumming and dehydration of waste edible oil for 15-30 minutes; reaction temperature is 343-373K;

[0053] A-1-2. Filter the residue of the above reaction;

[0054] A-2. Preparation of porous composite catalyst

[0055] A-2-1. Combine CaO: CaCO 3 The molar ratio of :NaOH:clay is 3:1:3:3 into the catalyst synthesis tank;

[0056] A-2-2. Calcined and pressed into a porous composite catalyst; the calcination temperature is 1073~1473K; the calcination time is 20~30min;

[0057] B. The reaction of bio-oils and short-chain alcohols

[0058] B-1. In the first stage of transesterification, the pretreated waste edible oil is pumped into the transesterificatio...

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Abstract

The invention relates to a method for preparing biodiesel with low energy consumption, belonging to biological oilseed synthesis field. The current technology is characterized by long time- consumption for biological enzyme catalysis, large wastewater generation by homogeneous acid alkaline catalysis, and large energy consumption of supercritical method. The invention takes short- chain alcohol as acyl accepter, takes porous composite catalyst to catalize ester exchange reaction and converse biological oil material into biodiesel. The solid porous composite catalyst is characterized by large contacting area with reactant, high catalytic efficiency, no alkaline wastewater, and easy separation of catalyst from product; the pH of produced biodiesel is 7, which saves washing process; there is no need for high temperature and pressure, which reduces energy consumption; pretreating short-chain alcohol with heat exchanger, and the short-chain alcohol is pumped into ester change room by gas circulation pump, which increases the vortex in reaction room for stirring and thus saves stirrer expense.

Description

technical field [0001] The invention relates to a method for producing biodiesel with low energy consumption. It belongs to the field of bio-oil synthesis. Background technique [0002] Fatty acid esters produced by the transesterification of biological oils and short-chain alcohols are 0 # A good alternative to diesel is known as biodiesel. The kinetic model for generating biodiesel by transesterification reaction is: [0003] <chemistry num="001"> <chem file="200610034240_CML001.XML" / > < / chemistry> [0004] <chemistry num="002"> <chem file="200610034240_CML002.XML" / > < / chemistry> [0005] <chemistry num="003"> <chem file="200610034240_CML003.XML" / > < / chemistry> [0006] Among them, TG, DG, MG, and GL represent triglyceride, diglyceride, monoglyceride, and glycerol, respectively. The techniques used in the transesterification process usually include biological enzyme catalysis, homogeneous acid-base cat...

Claims

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Application Information

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IPC IPC(8): C10G3/00
CPCY02E50/13Y02E50/10Y02P30/20
Inventor 黄晓琳廖文波
Owner 黄晓琳
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