Continuous production method of biodiesel from waste oil/fat

A technology for waste oil and biodiesel, which is applied in the production of fatty acids, biofuels, and fats, etc., can solve the problems of affecting the esterification rate and product yield, etc., so as to improve the utilization rate of heat energy, improve the efficiency of esterification, and stabilize production. Effect

Inactive Publication Date: 2012-07-18
潍坊大明生物科技有限公司
View PDF3 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of adding liquid methanol has strict requirements on the water content of the hydro

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Continuous production method of biodiesel from waste oil/fat
  • Continuous production method of biodiesel from waste oil/fat

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1. High-pressure hydrolysis of acidified vegetable oil bottoms to prepare fatty acids: acidified vegetable oily bottoms and hot water are injected into the hydrolysis tower in a proportion of 4:1, and the temperature is increased by 2.0MPa steam to obtain crude fatty acids with a hydrolysis rate of more than 98%, which naturally occur in the settling tank. Settling for 0.5h to remove water impurities.

[0027] 2. Esterification and dealcoholization: Dewatered fatty acid and concentrated sulfuric acid are injected into the esterification kettle, and compressed methanol gas is introduced. Under the pressure of 0.08MPa, the esterification is carried out step by step.

[0028] 3. Neutralization: After dealcoholization, the crude ester is transferred to a neutralization kettle and cooled to 70°C. Under stirring, soda ash powder is added to neutralize to the specified acid value, and the alkali residue is removed by sedimentation.

[0029] 4. Rectification: The neutralized cr...

Embodiment 2

[0031] 1. High-pressure hydrolysis of the mixture of acidified vegetable oil and waste oil to prepare fatty acid: the acidified vegetable oil and hot water are injected into the hydrolysis tower in a proportion of 3:1, and 3.0 MPa steam is used to pressurize and heat up to obtain a crude fatty acid with a hydrolysis rate of more than 96%. Natural sedimentation in the settling tank for 1h to remove water impurities.

[0032] 2. Esterification and dealcoholization: Dewatered fatty acid and concentrated sulfuric acid are injected into the esterification kettle, and compressed methanol gas is introduced to esterify step by step under the pressure of 0.55MPa. After esterification, alternate dealcoholization.

[0033] 3. Neutralization: After dealcoholization, the crude ester is transferred to a neutralization kettle and cooled to 80°C. Soda ash powder is added under stirring to neutralize to the specified acid value, and the alkali residue is removed by sedimentation.

[0034] 4. R...

Embodiment 3

[0036] 1. High-pressure hydrolysis of acidified vegetable oil bottoms to prepare fatty acids: acidified vegetable oily bottoms and hot water are injected into a hydrolysis tower in a proportion of 3.5:1, and 3.5 MPa steam is used to pressurize and heat up to obtain crude fatty acids with a hydrolysis rate of more than 98%. Settling for 1.5h to remove water impurities.

[0037] 2. Esterification and dealcoholization: Dewatered fatty acid and concentrated sulfuric acid are injected into the esterification kettle, and compressed methanol gas is introduced. Under the pressure of 1.5MPa, esterification is carried out step by step.

[0038] 3. Neutralization: After dealcoholization, the crude ester is transferred to a neutralization kettle to cool down to 90°C. Under stirring, soda ash powder is added to neutralize to the specified acid value, and the alkali residue is removed by sedimentation.

[0039] 4. Rectification: The neutralized crude ester enters the secondary rectification...

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

No PUM Login to view more

Abstract

The invention discloses a continuous production method of biodiesel from waste oil/fat. The method includes mixing waste oil/fat with water at volume ratio of (3-4):1, and hydrolyzing; naturally settling obtained crude fatty acid for 0.5-1.5 hr to remove water and impurities and collect dewatered fatty acid; injecting the dewatered fatty acid and concentrated sulfuric acid into esterification kettle, introducing compressed methanol gas, stepwise esterifying, and alternately removing alcohol after esterification to give crude ester; neutralizing the crude ester with sodium carbonate under stirring; and performing multi-stage distillation to give biodiesel. The method obviates mechanical vacuum distillation for water removal, reduces occurrence of reverse reaction, reduces investment of cooling equipment, improves utilization efficiency, lowers labor intensity, guarantees safe and stable production, and reduces sewage generation.

Description

technical field [0001] The invention relates to the field of chemical production, in particular to a method for continuously producing biodiesel by utilizing waste grease. Background technique [0002] Biodiesel, also known as fatty acid methyl ester, is mainly obtained by esterification of animal and vegetable oils, waste oils, etc. as raw materials with methanol. Biodiesel has become a substitute for fossil fuels due to its renewability and low pollution, and has been adopted by many countries as the development direction of new energy in the future. [0003] my country's "Tenth Five-Year Development Outline" has clearly encouraged the development of petroleum substitutes in advance, and identified the development of biofuels as the development direction of emerging industries. However, the development and research investment of biodiesel in my country is insufficient, and it is still in its infancy. Many production enterprises are small in scale, and the production techn...

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): C11C1/04C11C3/00C11B3/12C11B3/00C10L1/02
CPCY02E50/13Y02E50/10
Inventor 韩立斌刘斌朱培才赵修武
Owner 潍坊大明生物科技有限公司
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