CN102453613A - Method for producing diesel oil by esterification deacidification of rice bran oil - Google Patents
Method for producing diesel oil by esterification deacidification of rice bran oil Download PDFInfo
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- CN102453613A CN102453613A CN2010105152750A CN201010515275A CN102453613A CN 102453613 A CN102453613 A CN 102453613A CN 2010105152750 A CN2010105152750 A CN 2010105152750A CN 201010515275 A CN201010515275 A CN 201010515275A CN 102453613 A CN102453613 A CN 102453613A
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- deacidification
- esterification
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Abstract
The invention relates to a rice bran oil, specifically to a method for producing diesel oil by esterification deacidification of the rice bran oil, and belongs to the technical field of chemical industry. By the adoption of zinc oxide as a catalyst, the rice bran crude oil with high acid value undergoes esterification deacidification and is deacidified into a biodiesel material. The acid value of the rice bran oil can be decreased from 38.14mg/g to 5.17mg/g. Free fatty acid in the rice bran oil can react with glycerin at high temperature under vacuum in the presence of a catalyst to generate triacylglycerol, diacylglyeerol and monoglyceride. According to the chemical principle to design a chemical catalysis method, a lot of free fatty acid in the rice bran crude oil undergoes resterification to generate neutral oil. And simultaneously, the purpose of deacidification is achieved and the pollution of soap stock to the environment is eliminated. Additional loss is greatly reduced. And in the meanwhile, inevitable loss caused by free fatty acid which must be removed during the above chemical alkali refining and physical deacidification refining processes is changed into neutral rice bran grease, so as to raise the refining yield of the grease.
Description
Technical field
The present invention relates to a kind of Rice pollard oil, be specifically related to the method that diesel oil is produced in a kind of rice bran oil esterification depickling, belong to chemical technology field.
Background technology
Rice pollard oil is the grease that utilizes the sub product rice bran processing in the paddy processing to produce; It is the big and wide renewable resources of a kind of amount; Yet for a long time, as the rat chow livestock and poultry, nutritive value and economy of resources that it has are not fully exerted most of areas with rice bran; Be used for Rice pollard oil processing and be less than 15%, cause the significant wastage of these superior resources of rice bran.On the other hand; Since great quantity of small grease production enterprise to Rice pollard oil raw materials for production one rice bran in time do not carry out the glyceridase Passivation Treatment, the rice bran storage time is long or reserve temperature is high because the effect of glyceridase in the rice bran, the summer especially higher, that enzyme activity is strong in temperature; The rice bran crude oil acid number of producing is very high; Even reach 30～50mg/g, and substantially exceed the national standard of the rice bran crude oil of food oils, can't be used to produce edible oil.And biodiesel raw material also need be sloughed the high acid value composition to improve the transformation efficiency of fatty acid methyl ester (or fatty-acid ethyl ester).Traditional method for acid stripping and refining, chemical refining and physical refining method all are not suitable for the refining of high acid value Rice pollard oil; Refining yield is all lower, and alkali-refining deacidification also can produce a large amount of organic waste water, contaminate environment; The high acid value Rice pollard oil has been carried out the research of lipase-catalyzed esterification depickling with industrial direactive glyceride and lypase; Can effectively reduce the content of free lipid acid in the oil, but the price of enzyme is higher, is not suitable for suitability for industrialized production.
Summary of the invention
The objective of the invention is for overcoming the weak point of above-mentioned prior art; Provide a kind of rice bran oil esterification depickling to produce the method for diesel oil; This method is utilized high acid value rice bran crude oil, adopts zinc oxide as catalyzer, through esterification deacidification; Its depickling is become biodiesel raw material, and the Rice pollard oil acid number can be reduced to 5.17mg/g from 38.14mg/g.According to the free fatty acids in the Rice pollard oil under the condition that high temperature, vacuum and catalyzer exist; Can generate sweet three esters with glycerine reaction; The principles of chemistry design chemical catalysis method of a sweet diester and a sweet ester; Free fatty acids resterification a large amount of in the rice bran crude oil is generated neutral oil, reach the depickling purpose simultaneously, eliminate the soap stock pollution on the environment.It not only greatly reduces added losses, and the inevitable loss that the free fatty acids that simultaneously above-mentioned chemical alkali refining and physical deacidification refining must be removed causes becomes neutral rice bran grease, has improved greasy refining yield.
The present invention realizes with following technical scheme: the method for diesel oil is produced in a kind of rice bran oil esterification depickling; It is characterized in that: this method is utilized high acid value rice bran crude oil, adopts zinc oxide as catalyzer, through esterification deacidification; Its depickling is become biodiesel raw material, specifically comprise the steps:
(1) be under the 0.09MPa condition in vacuum tightness, the decolouring Rice pollard oil that will come unstuck places container, carries out 30min dehydration deoxygenation, is heated to 150 ℃;
(2) on the basis of step (1), add the glycerine of 0.2-0.4% and the catalyst oxidation zinc of 0.2-0.3% and carry out esterification deacidification reaction, temperature of reaction 160-220 ℃, reaction times 2-6h;
(3) reaction of step (2) finishes, and measures the acid number of Rice pollard oil, and the Rice pollard oil acid number can be reduced to 5.17mg/g from 38.14mg/g.
Advantage of the present invention is: according to the free fatty acids in the Rice pollard oil under the condition that high temperature, vacuum and catalyzer exist; Can generate sweet three esters with glycerine reaction; The principles of chemistry design chemical catalysis method of a sweet diester and a sweet ester; Free fatty acids resterification a large amount of in the rice bran crude oil is generated neutral oil, reach the depickling purpose simultaneously, eliminate the soap stock pollution on the environment.It not only greatly reduces added losses, and the inevitable loss that the free fatty acids that simultaneously above-mentioned chemical alkali refining and physical deacidification refining must be removed causes becomes neutral rice bran grease, has improved greasy refining yield.
Embodiment
Embodiment,
The method of diesel oil is produced in a kind of rice bran oil esterification depickling, and it is characterized in that: this method is utilized high acid value rice bran crude oil, adopts zinc oxide as catalyzer, through esterification deacidification, its depickling is become biodiesel raw material, specifically comprises the steps:
(1) be under the 0.09MPa condition in vacuum tightness, the decolouring Rice pollard oil that will come unstuck places container, carries out 30min dehydration deoxygenation, is heated to 150 ℃;
(2) on the basis of step (1), add the glycerine of 0.2-0.4% and the catalyst oxidation zinc of 0.2-0.3% and carry out esterification deacidification reaction, temperature of reaction 160-220 ℃, reaction times 2-6h;
(3) reaction of step (2) finishes, and measures the acid number of Rice pollard oil, and the Rice pollard oil acid number can be reduced to 5.17mg/g from 38.14mg/g.
Claims (1)
1. the method for diesel oil is produced in a rice bran oil esterification depickling, and it is characterized in that: this method is utilized high acid value rice bran crude oil, adopts zinc oxide as catalyzer, through esterification deacidification, its depickling is become biodiesel raw material, specifically comprises the steps:
(1) be under the 0.09MPa condition in vacuum tightness, the decolouring Rice pollard oil that will come unstuck places container, carries out 30min dehydration deoxygenation, is heated to 150 ℃;
(2) on the basis of step (1), add 0, the catalyst oxidation zinc of the glycerine of 2-0.4% and 0.2-0.3% carries out esterification deacidification reaction, temperature of reaction 160-220 ℃, reaction times 2-6h;
(3) reaction of step (2) finishes, and measures the acid number of Rice pollard oil, and the Rice pollard oil acid number can be reduced to 5.17mg/g from 38.14mg/g.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105152750A CN102453613A (en) | 2010-10-14 | 2010-10-14 | Method for producing diesel oil by esterification deacidification of rice bran oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105152750A CN102453613A (en) | 2010-10-14 | 2010-10-14 | Method for producing diesel oil by esterification deacidification of rice bran oil |
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|---|---|
| CN102453613A true CN102453613A (en) | 2012-05-16 |
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| CN2010105152750A Pending CN102453613A (en) | 2010-10-14 | 2010-10-14 | Method for producing diesel oil by esterification deacidification of rice bran oil |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103451009A (en) * | 2012-05-28 | 2013-12-18 | 中国石油天然气股份有限公司 | Preparation method of non-edible animal and plant crude oil refined oil |
| CN104450209A (en) * | 2014-12-02 | 2015-03-25 | 铜仁学院 | Method for reducing acid value of crude rice bran oil through solid super acid catalysis |
| CN108485822A (en) * | 2018-04-11 | 2018-09-04 | 安徽德运粮油有限公司 | A kind of ultrasonic wave promotes the esterification deacidification method of high acid value rice bran oil |
| CN111411018A (en) * | 2020-03-23 | 2020-07-14 | 太原理工大学 | Method for converting fatty acid into fatty acid ethyl ester |
| CN114410383A (en) * | 2022-02-20 | 2022-04-29 | 浙江工业大学 | Method for preparing biodiesel by using waste oil |
-
2010
- 2010-10-14 CN CN2010105152750A patent/CN102453613A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103451009A (en) * | 2012-05-28 | 2013-12-18 | 中国石油天然气股份有限公司 | Preparation method of non-edible animal and plant crude oil refined oil |
| CN103451009B (en) * | 2012-05-28 | 2015-05-20 | 中国石油天然气股份有限公司 | Preparation method of non-edible animal and plant crude oil refined oil |
| CN104450209A (en) * | 2014-12-02 | 2015-03-25 | 铜仁学院 | Method for reducing acid value of crude rice bran oil through solid super acid catalysis |
| CN108485822A (en) * | 2018-04-11 | 2018-09-04 | 安徽德运粮油有限公司 | A kind of ultrasonic wave promotes the esterification deacidification method of high acid value rice bran oil |
| CN111411018A (en) * | 2020-03-23 | 2020-07-14 | 太原理工大学 | Method for converting fatty acid into fatty acid ethyl ester |
| CN114410383A (en) * | 2022-02-20 | 2022-04-29 | 浙江工业大学 | Method for preparing biodiesel by using waste oil |
| CN114410383B (en) * | 2022-02-20 | 2023-07-25 | 浙江工业大学 | Method for preparing biodiesel by using waste grease |
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Application publication date: 20120516 |