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Method for purifying 1-octylene from Fischer-Tropsch synthetic oil products

A technology of Fischer-Tropsch synthesis and octene, applied in distillation purification/separation, organic chemistry, azeotropic distillation, etc., can solve complex problems, achieve scientific design, reduce solvent ratio, and save costs

Active Publication Date: 2012-05-16
SYNEFUELS CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the separation of 1-octene from Fischer-Tropsch synthetic oil is a very complicated process

Method used

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  • Method for purifying 1-octylene from Fischer-Tropsch synthetic oil products
  • Method for purifying 1-octylene from Fischer-Tropsch synthetic oil products
  • Method for purifying 1-octylene from Fischer-Tropsch synthetic oil products

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Embodiment 1

[0077] According to this embodiment figure 1 The process shown is carried out.

[0078] Make the Fischer-Tropsch synthetic light distillate stream 1 enter the 1# cutting tower that the number of theoretical plates is 35, the reflux ratio is 4, and the feeding position is 19 plates (from top to bottom, the same below), from the 1# cutting tower At the end, stream 3 is obtained as C 8 + (including C 8 ) fraction, the purity reaches 99.95%, and the recovery rate reaches 99.97%;

[0079] The C 8 + The fraction enters the 2# cutting tower with a theoretical plate number of 35, the reflux ratio is 4, and the feeding position is 19 plates, and C can be obtained from the top of the tower. 8 Component stream 4;

[0080] C 8 The fraction enters an azeotropic rectification tower with a theoretical plate number of 20. In this embodiment, the heterogeneous azeotropic rectification process is selected. The entrainer is a binary mixed solvent of ethanol and water containing 86% ethan...

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Abstract

The invention relates to a method for purifying 1-octylene from Fischer-Tropsch synthetic oil products as well as an equipment system for implementing the method. The method comprises the following steps of: taking Fischer-Tropsch synthetic light fraction oil as a raw material, and carrying out secondary fraction cutting to obtain a C8 fraction segment; carrying out azeotropic distillation, and simultaneously removing acids and other organic oxygen-containing compounds from the C8 fraction segment by using a binary entrainer containing ethanol and water; then, carrying out extractive distillation to separate alkanes from olefins of the C8 fraction segment to obtain C8 olefins; and further purifying the C8 olefins through precise distillation to obtain 1-octylene products meeting polymerization-grade requirements. The invention also discloses the equipment system for implementing the method, and the equipment system comprises a first cutting tower, a second cutting tower, an azeotropic distillation tower, an extractive distillation tower, a precise distillation tower and associated equipment. The method and equipment provided by the invention have scientific and reasonable design and high economic benefit.

Description

technical field [0001] The present invention relates to a kind of Fischer-Tropsch synthetic oil product, especially the processing method of Fischer-Tropsch synthetic light distillate oil, specifically, the present invention relates to extracting high-purity oil from Fischer-Tropsch synthetic oil, especially Fischer-Tropsch synthetic light distillate oil 1-octene method. Background technique [0002] Due to the energy crisis and rising crude oil prices, the production and subsequent processing of synthetic oils have attracted widespread attention from industry and researchers in recent years. Among them, Fischer-Tropsch synthesis (also known as F-T synthesis or FTS) oil has attracted much attention because it can produce ultra-clean diesel with high cetane number. [0003] At present, domestic and foreign follow-up processing methods for Fischer-Tropsch synthetic oil products mainly focus on distillation and rectification. Such as US7217852, US7294253, AU199951882, US68552...

Claims

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Application Information

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IPC IPC(8): C07C11/02C07C7/04C07C7/06C07C7/08B01D3/36B01D3/40
Inventor 李永旺张立董立华白亮杨勇郝栩陶智超曹立仁
Owner SYNEFUELS CHINA
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