Method for low-pressure continuous hydrolysis preparation of fatty acid

A fatty acid and crude fatty acid technology, which is applied in the production of fatty acid and chemical modification of fatty acid, etc., can solve the problems that small and medium-sized enterprises cannot afford the operation cost, the high production cost of fatty acid, and the huge investment, so as to achieve short reaction time, lower pressure level, The effect of reducing the amount of investment

Inactive Publication Date: 2004-11-10
陈天晓
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The reason why the middle and high pressure method cannot be vigorously promoted is that the huge investment and high operating costs formed by the high pressure system of the production device make it impossible for small and medium-sized enterprises to afford it, resulting in high production costs of fatty acids

Method used

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  • Method for low-pressure continuous hydrolysis preparation of fatty acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] use figure 1 As shown in the process flow, on a small-scale continuous hydrolysis device with a processing capacity of 20 kg / hour, the acidified oil obtained from the cottonseed oil foot after acidification treatment has an acid value of 68mgKOH / g, and water is metered by a metering pump, and the water oil The ratio is 1:4, the outlet pressure of the pump is 0.4Mpa, it enters the tubular heating furnace and is heated to 380°C and then enters the reactor. After reacting for 6 minutes, it is cooled to normal temperature by the cooler and then enters the separator. After separation, crude fatty acid and fuel gas. The crude fatty acid is distilled to obtain fatty acid, its acid value is: 193mgKOH / g, and its freezing point is 32°C.

Embodiment 2

[0020] Cottonseed oil (edible grade) is used as raw material on the device of Example 1, the operating conditions are: water-oil ratio 28: 100, pump outlet pressure 0.36Mpa, reaction temperature 395 ℃, reaction time is 15 minutes, after cooling, distill, obtain The acid value of fatty acid is 190.5mgKOH / g.

Embodiment 3

[0022] The reaction product obtained by using the raw materials and reaction conditions of Example 1 on the device of Example 1, but directly enters the fractionation system without cooling, can obtain fuel gas from the top, residue from the bottom, and fatty acid from the middle. 196.5mgKOH / g, freezing point 33°C, qualified color.

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Abstract

The invention provides a process for preparing fatty acid through low pressure continuous hydrolytic decomposition, wherein the water-oil weight ratio is 5-30:100, the pump output pressure is controlled between the range of 0.02-0.5MPa, preferably between 0.1-0.4MPa, the raw materials are subjected to heat transfer through heat exchanger and are charged into heating-furnace to be heated to 250-500 deg. C and enter reactor, reacting for 2-30 minutes and the reaction product is led out, the fatty acid is obtained by straight distillation of separated crude fatty acid or fuel gas.

Description

technical field [0001] The invention relates to a method for producing fatty acid by continuous hydrolysis under low pressure, in particular to a method for producing fatty acid by continuous hydrolysis under low pressure condition by utilizing various oils and fats in the process of producing fatty acid. Background technique [0002] Traditional fatty acid production methods include saponification, acidification, and medium-high pressure hydrolysis. Except for the high-pressure method, the other methods need to be carried out under the action of a catalyst. It is difficult to remove the residual catalyst, the waste water treatment load is heavy, the sewage discharge and pollution control intensity are high, and the hydrolysis rate is low, all of which are lower than 95%. Although the production of fatty acids by medium and high pressure hydrolysis method does not use catalysts and has a high hydrolysis rate, it needs external high-temperature and high-pressure steam to meet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11C3/00
Inventor 陈天晓
Owner 陈天晓
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