Method for preparing fatty acid by illegal cooking oil

A fatty acid and gutter oil technology applied in the field of oleochemicals to achieve high efficiency, increase hydrolysis reaction rate, and short process

Inactive Publication Date: 2010-12-29
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that waste oil is not used to produce fatty acid in the prior ar

Method used

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  • Method for preparing fatty acid by illegal cooking oil
  • Method for preparing fatty acid by illegal cooking oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The method of utilizing waste oil to prepare fatty acid is:

[0019] A. Send water into the steam generator, control the temperature of the steam generator to 110°C and the pressure to 0.10MPa, so that the water evaporates into steam;

[0020] B. Send waste oil with an acid value of 161mgKOH / g into the hydrolysis reactor, and control the temperature of the hydrolysis reactor to 200°C and the pressure to 0.10MPa;

[0021] C, the water vapor of step A is 250m 3 The flow rate of / h is sent to the hydrolysis reaction kettle of step B, so that the waste oil is hydrolyzed with water vapor under high temperature conditions, and fatty acid, crude glycerin and oil are obtained by hydrolysis;

[0022] The fatty acids obtained in steps D and C enter into the condenser along with water vapor, and after conventional condensation, enter the fatty acid separator, control the temperature of the fatty acid separator to be 50° C., and the pressure to be 0.11 MPa to separate the fatty ac...

Embodiment 2

[0026] The method of utilizing waste oil to prepare fatty acid is:

[0027] A. Send water into the steam generator 3, control the temperature of the steam generator 3 to be 105°C and the pressure to be 0.12MPa, so that the water is evaporated into steam;

[0028] B. Send waste oil with an acid value of 163mgKOH / g into the hydrolysis reactor 2, and control the temperature of the hydrolysis reactor 2 to be 250°C and the pressure to be 0.12MPa;

[0029] C, the water vapor of step A is 200m 3 The flow rate of / h is sent into the hydrolysis reaction kettle 2 of step B, so that the waste oil is hydrolyzed with water vapor under high temperature conditions, and fatty acid, crude glycerin and oil are obtained by hydrolysis;

[0030] D, the fatty acid obtained in step C enters the condenser 5 along with water vapor, and after conventional condensation, enters the fatty acid separator 4 again, and the temperature of the fatty acid separator 4 is controlled to be 50°C and the pressure i...

Embodiment 3

[0034] The method of utilizing waste oil to prepare fatty acid is:

[0035] A. Send water into the steam generator 3, control the temperature of the steam generator 3 to be 100°C and the pressure to be 0.15MPa, so that the water is evaporated into steam;

[0036] B. Send waste oil with an acid value of 162mgKOH / g into the hydrolysis reactor 2, and control the temperature of the hydrolysis reactor 2 to be 230°C and the pressure to be 0.09MPa;

[0037] C, the water vapor in step A is 225m 3 The flow rate of / h is sent into the hydrolysis reaction kettle 2 of step B, so that the waste oil is hydrolyzed with water vapor under high temperature conditions, and fatty acid, crude glycerin and oil are obtained by hydrolysis;

[0038] The fatty acid obtained in D and C steps enters the condenser 5 along with water vapor, and after conventional condensation, enters the fatty acid separator 4, and controls the temperature of the fatty acid separator 4 to be 80° C. and a pressure of 0.10 ...

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Abstract

The invention provides a method for preparing fatty acid by illegal cooking oil. Water is sent into a steam generator, the temperature is controlled to be 100-110 DEG C, pressure is controlled to be 0.10-0.15MPa, so that the water is evaporated into steam; illegal cooking oil is sent into a hydrolysis kettle, the temperature is controlled to be 200-250 DEG C, and the pressure is controlled to be 0.09-0.12MPa; and the steam is sent into the hydrolysis kettle at the flow of 200-250m3/h, and the illegal cooking oil and the steam are subjected to a hydrolysis reaction under high temperature condition, thus obtaining fatty acid, crude glycerine, oil and water. Water and oil are all returned to be recycled, not only no pollute is discharged, but also cost is saved, water resource consumption is reduced, the entire process is continuous, reaction velocity is high, flow is short, equipment is simple, investment cost is low, production process is clean, and the method is beneficial to environmental protection.

Description

technical field [0001] The invention relates to a method for preparing fatty acid, in particular to a method for preparing fatty acid from waste oil, which belongs to the technical field of oleochemical industry. Background technique [0002] Fatty acids are important chemical raw materials and can be widely used in surfactants, cosmetics, detergents, agricultural chemicals, pharmaceuticals and other industrial chemicals. At present, fatty acids are mainly derived from natural oils, and there are methods such as acid hydrolysis, alkali hydrolysis, high temperature hydrolysis and lipase hydrolysis in industry. With the wide application of fatty acids in food, medicine, textile, daily chemical and plastic industries, fatty acids show great development potential. Using gutter oil to produce fatty acids can not only turn waste into treasure, but also find a way out for waste catering oil, avoiding the harm to human health from flowing into the edible oil market, and avoiding di...

Claims

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Application Information

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IPC IPC(8): C11C1/04
Inventor 吴桢芬苏有勇王华包桂蓉
Owner KUNMING UNIV OF SCI & TECH
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