Method for cross distillation separation of C13-16 n-alkanes in liquid wax oil

A technology for separation of n-paraffins and rectification, applied in distillation purification/separation, organic chemistry, etc., can solve the problems of low product purity and yield, cumbersome operation, high energy consumption in separation process, and achieve the effect of saving energy consumption

Active Publication Date: 2017-11-24
江苏五洋碳氢科技有限公司 +1
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  • Abstract
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Problems solved by technology

[0003] At present, in industrial production, distillation cuts or multiple vacuum distillations are mainly used to extract n-alkanes in liquid wax oil. Distillation can obtain normal alkanes with a certain purity and yield, but the energy consumption of the separation process is relatively high

Method used

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  • Method for cross distillation separation of C13-16 n-alkanes in liquid wax oil
  • Method for cross distillation separation of C13-16 n-alkanes in liquid wax oil
  • Method for cross distillation separation of C13-16 n-alkanes in liquid wax oil

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Embodiment 1

[0028] C in a kind of cross rectification separation liquid wax oil of the present invention 13-16 Processes for n-paraffins, as attached figure 2 Shown:

[0029] (1) Raw material ① is added from the 16th block of the vacuum side line rectification tower 10, and the pressure of the control tower is 0.006MPa. ~176.3°C, the reflux ratio is controlled to be 5:1. After separation, n-tridecane is obtained from the top of the tower ②, and the mass content and yield reach 99.61% and 99.56% respectively. The side line ③ is n-tetradecane and n-pentadecane fractions. The bottom of the tower ④ is n-pentadecane and n-hexadecane cuts;

[0030] (2) The side stream distillate is sent to the vacuum side stream lifting rectification tower 11 for separation, and the temperature at the top and bottom of the tower is controlled to be 154.1-156.3°C and 169.5-171.3°C respectively, and the reflux ratio is 4:1. The top of the tower ⑤ is obtained n-tetradecane, the mass content and yield reach 99....

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Abstract

The invention discloses a method for cross distillation separation of C13-16 n-alkanes in liquid wax oil. In the method, decompression lateral line rectifying, decompression lateral line lifting rectifying and decompression rectifying are combined for extracting n-tridecane, n-tetradecane, n-pentdecne and n-cetane from the liquid wax oil. Compared with the prior art, the method disclosed by the invention has the advantages that the process is continuously operated, the content and yield of the separated n-tridecane, n-tetradecane, n-pentdecne and n-cetane are all above 99.5% and the energy consumption is at least 8.5% lower than that of the traditional repeated decompression rectifying.

Description

technical field [0001] The invention discloses a method for cross rectification and separation of C13-16 normal alkanes in liquid wax oil, and belongs to the technical field of separation methods of high boiling point solvent oil. Background technique [0002] Liquid paraffin oil is derived from high boiling point solvent oil, the boiling point is usually 200 ~ 300 ° C, C 13-16 Normal alkanes can be used as solvents, organic synthesis intermediates and chromatographic analysis standard substances. Tridecane is used as solvent raw material oil in paint, rubber, latex production and other industries. It is the main additive of lubricating oil surfactant. The derivative product tridecane dibasic acid: mainly used in the preparation of high-grade spices and elk T, Hot melt adhesives and other adhesives are also the main raw materials of high-grade nylon 1313, chlorinated paraffin additives, toxic product release agents and cosmetics; Paraffin wax, anti-corrosion coating and po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C7/04C07C9/15C07C9/22
CPCC07C7/04C07C9/15C07C9/22
Inventor 顾正桂华琳孔瑞用温国贤徐荣昌孙昊
Owner 江苏五洋碳氢科技有限公司
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