Method for preparing biodiesel by lowering value of high acid palm oil

A biodiesel and palm oil technology, applied in the direction of biological raw materials, biofuels, petroleum industry, etc., can solve the problems of severe reactor corrosion, expensive resin, and difficult to obtain products, and achieve no equipment corrosion, easy separation, and reduced acid value effect

Inactive Publication Date: 2008-07-30
SICHUAN UNIV
View PDF5 Cites 39 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN1412278A adopts strong acid, such as sulfuric acid, as a catalyst to carry out esterification and transesterification treatment of waste oil and palm oil with high acid value. This method corrodes the reactor seriously and produces a large amount of waste water
CN1556174A uses high acid value (10~150mgKOH/g oil) animal and vegetable oil to make biodiesel, uses strong acid as catalyst to carry out esterification, and then uses strong base as catalyst to carry out transesterification, a large amount of waste water is produced in the reac

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0013] Example 1:

[0014] Add palm oil and methanol with an acid value of 181.7mgKOH / g into a three-necked flask at a molar ratio of 1:6, and add solid super acid SO with an oil weight of 5wt% 4 2- / ZrO 2 Catalyst, control the reaction temperature to 60~62℃, stir and reflux the reaction with a heat-collecting magnetic stirrer for 4h, centrifuge the catalyst, leave the crude product to stand for layering, take the methyl ester layer and measure its acid value to decrease to 6.5mgKOH / g. The conversion rate was 96.4%.

[0015] Add the methyl ester phase with an acid value of 6.5 mgKOH / g and methanol into a three-necked flask at a molar ratio of 1:6, and add solid super acid SO with an oil weight of 5wt% 4 2- / ZrO 2 Catalyst, control the reaction temperature to 60~62℃, stir and reflux the reaction with a heat-collecting magnetic stirrer for 4h, centrifuge the catalyst, leave the crude product to stand for layering, take the methyl ester layer and measure its acid value to decrease ...

Example Embodiment

[0016] Example 2:

[0017] Add palm oil and methanol with an acid value of 181.7mgKOH / g into a three-necked flask at a molar ratio of 1:9, and add solid super acid SO with an oil weight of 3wt% 4 2- / ZrO 2 Catalyst, control the reaction temperature to 68~69℃, stir and reflux the reaction with a heat-collecting magnetic stirrer for 2h, centrifuge the catalyst, leave the crude product to stand for layering, take the methyl ester layer and measure the acid value to decrease to 3.2mgKOH / g. The conversion rate was 98.2%.

[0018] Add the methyl ester phase with an acid value of 3.2mgKOH / g and methanol into a three-necked flask at a molar ratio of 1:9, and add solid super acid SO with an oil weight of 5wt% 4 2- / ZrO 2 Catalyst, control the reaction temperature to 68~69℃, stir and reflux the reaction with a heat-collecting magnetic stirrer for 2h, centrifuge the catalyst, leave the crude product to stand for layering, take the methyl ester layer and measure its acid value to decrease t...

Example Embodiment

[0019] Example 3:

[0020] Add palm oil with an acid value of 181.7 mgKOH / g and methanol into a three-necked flask at a molar ratio of 1:6, and add solid super acid SO with an oil weight of 5wt% 4 2- / TiO 2 Catalyst, control the reaction temperature to 62~63℃, stir and reflux the reaction with a heat-collecting magnetic stirrer for 6h, centrifuge the catalyst, leave the crude product to stand and layer, take the methyl ester layer and measure its acid value to 14.4mgKOH / g. The conversion rate is 92.0%.

[0021] Add the methyl ester phase with an acid value of 14.4 mgKOH / g and methanol into a three-neck flask at a molar ratio of 1:6, and add solid super acid SO with an oil weight of 5wt% 4 2- / ZrO 2 Catalyst, control the reaction temperature to 62~63℃, stir and reflux the reaction with a heat-collecting magnetic stirrer for 6h, centrifuge the catalyst, leave the crude product to stand for layering, take the methyl ester layer and measure its acid value to decrease to 0.7mgKOH / g. ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Acid valueaaaaaaaaaa
Acid valueaaaaaaaaaa
Acid valueaaaaaaaaaa
Login to view more

Abstract

The invention provides a method which uses palm oil to prepare biologic diesel oil and can lower the high acid value. The method uses solid super acids of SO>4<2- >/ZrO2, SO4< 2- >/TiO2, and SO4< 2- >/xZrO<2- yTiO2 as catalyst, and uses low-carbon alcohol as esterifying agent to pre-treat the high acid value palm oil, can effectively lower the acid value of the oil, and can ensure the acid vale of the obtained biologic diesel oil to easily meet the standard (less than 0.8mgKOH/g, ASTM). The catalyst used by the invention has high catalytic activity, and is reusable. The process flow is simple, the production cost is decreased, and the environmental pollution is reduced greatly.

Description

field of invention [0001] The invention belongs to biodiesel preparation technology. Background of the invention [0002] The main chemical components of animal and vegetable oils are fatty acid glycerides, and biodiesel and glycerin are obtained through transesterification of oils and monohydric low-carbon alcohols (methanol). Biodiesel has excellent combustion performance, and its cetane number, viscosity, and combustion heat index can all reach the standard of ordinary diesel oil. As a clean and renewable green energy, biodiesel has attracted more and more attention due to its excellent environmental protection characteristics, good safety performance (high flash point) and renewability. [0003] The traditional production method of biodiesel is to use alkali metal hydroxide with high solubility of oil in methanol as a homogeneous catalyst for transesterification reaction, which has high reactivity and fast rate. However, when an alkaline catalyst is used, the presence ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C11C3/04C11C3/10C10G3/00
CPCY02E50/13Y02E50/10Y02P30/20
Inventor 胡常伟童冬梅蔡伊莎祝良芳李桂英
Owner SICHUAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap