Method for separating tall oil

A separation method and wood pulp oil slick technology, which can be used in the preparation/refining of steroids, fatty acids, and natural resin refining, etc., can solve the problems of low product purity, large solvent consumption, and low yield.

Active Publication Date: 2014-07-02
XIAN HEALTHFUL BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional process of separating the active components of tall oil from wood pulp uses a rectification tower but fails to effectively separate the two active ingredients of fatty acid and rosin. The processing utilization rate of tall oil from wood pulp is low, and the resulting product has low purity and low solvent consumption.
[0007] It can be seen that the traditional process has a low yield after separating the active components in the wood pulp tall oil, a single product category, and a large solvent consumption

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0087] Embodiment 1: the separation of wood pulp tall oil

[0088] The implementation steps of this embodiment are as follows:

[0089] A. Thin film distillation

[0090] Preheat 100Kg of wood pulp slick oil, and then send it to the thin film distillation tower sold by Wuxi Hexiang Biochemical Equipment Co., Ltd. under the trade name of thin film still VRT, and carry out thin film distillation under the conditions of absolute vacuum degree of 30Pa and temperature of 112°C. Obtain a light phase containing impurities and a heavy phase containing fatty acids; the light phase is discarded;

[0091] B. Primary molecular distillation

[0092] 100Kg of the heavy phase obtained in step A is sent to the primary distillation tower sold by Wuxi Hexiang Biochemical Equipment Co., Ltd. under the trade name thin film distillation device VRT, wherein the distance between the fatty acid trap and the heating surface is 10 cm. Under the conditions of an absolute vacuum of 12 Pa and a temperatu...

Embodiment 2

[0099] Embodiment 2: the separation of wood pulp tall oil

[0100] The implementation steps of this embodiment are as follows:

[0101] A. Thin film distillation

[0102] Preheat 100Kg of wood pulp slick oil, and then send it to a thin film distillation tower sold by Wuxi Hexiang Biochemical Equipment Co., Ltd. under the trade name of thin film still VRT, and carry out thin film distillation under the conditions of absolute vacuum of 35Pa and temperature of 118°C. Obtain a light phase containing impurities and a heavy phase containing fatty acids; the light phase is discarded;

[0103] B. Primary molecular distillation

[0104] 100Kg of the heavy phase obtained in step A is sent to the primary distillation column sold by Wuxi Hexiang Biochemical Equipment Co., Ltd. under the trade name thin film distillation device VRT, wherein the distance between the fatty acid trap and the heating surface is 4cm, in Under the conditions of absolute vacuum degree of 14Pa and temperature o...

Embodiment 3

[0112] Embodiment 3: the separation of wood pulp tall oil

[0113] The implementation steps of this embodiment are as follows:

[0114] A. Thin film distillation

[0115] Preheat 100Kg of wood pulp slick oil, and then send it to a thin film distillation tower sold by Wuxi Hexiang Biochemical Equipment Co., Ltd. under the trade name of thin film still VRT, and carry out thin film distillation under the conditions of absolute vacuum degree of 40Pa and temperature of 124°C. Obtain a light phase containing impurities and a heavy phase containing fatty acids; the light phase is discarded;

[0116] B. Primary molecular distillation

[0117] 100Kg of the heavy phase obtained in step A is sent to the primary distillation tower sold by Wuxi Hexiang Biochemical Equipment Co., Ltd. under the trade name thin film distillation device VRT, wherein the distance between the fatty acid trap and the heating surface is 6 cm. Under the conditions of absolute vacuum degree of 15Pa and temperatu...

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PUM

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Abstract

The invention relates to a method for separating tall oil. The method comprises the steps of thin film distillation, first-stage molecular distillation, second-stage molecular distillation, saponification and esterification, washing and the like. By adopting the method disclosed by the invention, tall oil fatty acid, refined phytosterol and tall oil rosin are obtained by separating the tall oil, wherein the fatty acid content of tall oil fatty acid is more than 90%, and the recovery rate of tall oil fatty acid reaches more than 90%; the phytosterol content of refined phytosterol is more than 90%, and the recovery rate of refined phytosterol reaches more than 80%.

Description

【Technical field】 [0001] The invention belongs to the technical field of chemical industry. More specifically, the present invention relates to a method for separating tall oil from wood pulp. 【Background technique】 [0002] In paper pulp produced by the kraft process from wood-processing wood chip feedstock such as pine, fir, and cypress, the soap skimmed from the surface of the paper pulp is often referred to as tall oil soap. It can be produced by sulfation tall oil (talloil), also known as wood pulp tall oil. Natural wood pulp tall oil is mainly composed of tall oil rosin, tall oil fatty acid and some unsaponifiable matter, of which the amount of tall oil rosin is 40% to 60%, tall oil fatty acid is 30% to 60%, and unsaponifiable matter is 5% ~10%. [0003] The main component of tall oil rosin is resin acid, which has many isomers, and they have a general chemical formula C 10 h 20 COOH is a monobasic acid with a three-ring rotating skeleton and two double chains. Am...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07J9/00C09F1/02C11C1/10
Inventor 孟永宏李玉松孟利军杨敏牛永洁
Owner XIAN HEALTHFUL BIOTECH
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