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A kind of refining method of sec-butyl acetate by-product heavy hydrocarbon

A technology of sec-butyl acetate and a refining method, which is applied in the field of heavy hydrocarbon preparation, can solve the problems that high-value-added products cannot be produced from high-carbon olefin raw materials, and the purity of heavy hydrocarbon products is low, so as to increase added value, avoid polymerization coking, and improve purity high effect

Active Publication Date: 2016-04-20
HUIZHOU YUSSEN CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of the existing preparation technology, and remove acid, sec-butyl acetate, ash, metal ions, etc. Impurities, achieve the effect of refining heavy hydrocarbons, solve the problem that the purity of heavy hydrocarbons produced by sec-butyl acetate is low, and it cannot be used as high-carbon olefin raw materials to produce high value-added products

Method used

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  • A kind of refining method of sec-butyl acetate by-product heavy hydrocarbon

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Heavy hydrocarbons with a mass flow rate of 0.5t / h, in which the hydrocarbon content is 50.04%, the sec-butyl acetate content is 47.58%, the acid content is 1.51%, the water content is 0.34%, the ash content is 0.53%, and the mass flow rate is 0.53 The t / h washing water is mixed and then fed to the heavy hydrocarbon refining tower. The temperature at the top of the tower is 87°C, and the temperature of the tower bottom is 101°C. By controlling the hydrocarbon-water interface of the heavy hydrocarbon refining tower, the medium entering the reboiler of the tower bottom It is all water, and the azeotrope formed by sec-butyl acetate and water is extracted from the top of the tower. After condensation, it is layered in the top reflux tank, and the water is refluxed to the heavy hydrocarbon refining tower, and the sec-butyl acetate is separated and extracted. , the mixture of heavy hydrocarbons and water is extracted from the side line of the tower kettle, and after condensati...

Embodiment 2

[0032] The mass flow rate of heavy hydrocarbons is 0.3t / h, of which the hydrocarbon content is 57.70%, the sec-butyl acetate content is 40.11%, the acid content is 1.35%, the water content is 0.36%, and the ash content is 0.48%. The mass flow rate is 0.45t / h. After mixing, the feed is fed to the heavy hydrocarbon refining tower. The temperature at the top of the tower is 85°C and the temperature of the tower bottom is 95°C. By controlling the hydrocarbon-water interface of the heavy hydrocarbon refining tower, the The medium is water, and the azeotrope formed by sec-butyl acetate and water is extracted from the top of the tower. After condensation, it is layered in the top reflux tank, and the water is refluxed to the heavy hydrocarbon refining tower. The sec-butyl acetate is separated and recovered. The mixture of heavy hydrocarbons and water is extracted from the side line of the tower kettle. After condensation, it enters the heavy hydrocarbon separation tank to realize the ...

Embodiment 3

[0034] The mass flow rate of heavy hydrocarbons is 0.4t / h, of which the hydrocarbon content is 47.11%, the sec-butyl acetate content is 51.07%, the acid content is 1.05%, the water content is 0.29%, and the ash content is 0.48%. The mass flow rate is 0.3t / h, the temperature at the top of the tower is 89°C, and the temperature at the bottom of the tower is 107°C. By controlling the hydrocarbon-water interface of the heavy hydrocarbon refining tower, the medium entering the reboiler at the bottom of the tower is water, sec-butyl acetate and The azeotrope formed by water is extracted from the top of the tower. After being condensed, it is stratified in the top reflux tank, and the water is refluxed to the heavy hydrocarbon refining tower. Second-butyl acetate is separated and extracted, and heavy hydrocarbons and The water mixture, after being condensed, enters the heavy hydrocarbon separation tank to realize the hydrocarbon-water layering. This part of water and the water extract...

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Abstract

The invention discloses a refining method for secondary production of heavy hydrocarbons from sec-butyl acetate. Water is injected into a heavy hydrocarbon refining tower and heated by a reboiler to vaporize the water in the tower kettle. The butyl ester forms an azeotrope and distills from the top of the tower, and most of the water falls back to the bottom of the tower. During the fall, the heavy hydrocarbons are washed with water, which effectively avoids the coking of heavy hydrocarbons caused by the high temperature of the bottom of the tower. At the same time, remove acid, sec-butyl acetate, ash, and metal ion impurities in heavy hydrocarbons to obtain high-quality heavy hydrocarbon products. The present invention has the following beneficial effects: (1) The distillation range temperature is lower than the boiling point of sec-butyl acetate; (2) The method of steam stripping in the tower avoids the occurrence of hydrocarbon coking; (3) simultaneously removes Second-butyl acetate, acid, ash, metal ions and other impurities; (4) The purity of the heavy hydrocarbons produced is relatively high. The method of the invention has excellent application prospects in the field of preparing sec-butyl acetate by synthesizing acetic acid and butene.

Description

technical field [0001] The invention relates to the technical field of heavy hydrocarbon preparation, in particular to a refining method for by-producting heavy hydrocarbons from sec-butyl acetate. Background technique [0002] High-carbon olefins usually refer to olefins with a carbon number of 4 or more. High-carbon olefins are extremely versatile, especially α-olefins, which are used to produce high-grade polyolefin resins, synthetic high-grade lubricants, detergents and surfactants. , plasticizers, oilfield chemicals and other excellent raw materials. [0003] In the production process of preparing sec-butyl acetate from acetic acid and butene, although the reaction conditions are mild, there is inevitably a small amount of thermal polymerization of olefins in the reaction process, and these polymers are mainly dimerization and trimerization products of C4 olefins. That is, C8 and C12 olefins, among which C12 olefins are mainly concentrated in the by-product heavy hydro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G31/08
CPCC10G31/08C10G2300/1088C10G2300/201C10G2300/205
Inventor 胡先念余良军甘军华周红亮
Owner HUIZHOU YUSSEN CHEM CO LTD