Method for removing heavy hydrocarbon from reaction product of preparation of sec-butyl acetate

A technology of sec-butyl acetate and reaction product, which is applied in the field of removing heavy hydrocarbons in the reaction product of preparing sec-butyl acetate, can solve problems such as no method for removing heavy hydrocarbons, no mention, etc., to reduce energy consumption and material consumption , The effect of improving product quality and improving operating conditions

Active Publication Date: 2008-02-27
HUNAN ZHONGCHUANG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In all above-mentioned processes utilizing acetic acid and butene or mixed C4 as raw materials to prepare sec-butyl acetate, it is not mentioned that the raw material butene or mixed C4 can be polymerized to form heavy hydrocarbons, and the method of removing heavy hydrocarbons in the reaction product has not been proposed. method

Method used

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  • Method for removing heavy hydrocarbon from reaction product of preparation of sec-butyl acetate
  • Method for removing heavy hydrocarbon from reaction product of preparation of sec-butyl acetate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] In the previous process, the reaction mixture is removed from unreacted C4 and light components, and then mixed with water, using water as an entrainer to azeotropically separate acetic acid and sec-butyl acetate, at the bottom of the azeotropic distillation column That is the heavy hydrocarbon enrichment area. Referring to Fig. 1, the material drawn from the bottom of the azeotropic rectification tower enters the lower part of the heavy hydrocarbon water washing tower, and the mass flow rate of the material is 100Kg / hr. Water is injected into the upper part of the heavy hydrocarbon water washing tower, and the water mass flow rate is 800Kg / hr (the ratio of the mass flow rate of water to the material mass flow rate is 8). After the reverse contact between water and materials, heavy hydrocarbons are discharged from the top of the heavy hydrocarbon washing tower, and water is pumped out from the bottom of the heavy hydrocarbon washing tower and reinjected into the system....

Embodiment 2

[0024] In the previous process, the reaction mixture is removed from unreacted C4 and light components, and then mixed with water, using water as an entrainer to azeotropically separate acetic acid and sec-butyl acetate, at the bottom of the azeotropic distillation column That is the heavy hydrocarbon enrichment area. Referring to Fig. 1, the material drawn from the bottom of the azeotropic rectification tower enters the lower part of the heavy hydrocarbon water washing tower, and the mass flow rate of the material is 100Kg / hr. Water is injected into the upper part of the heavy hydrocarbon water washing tower, and the water mass flow rate is 150Kg / hr (the ratio of the mass flow rate of water to the material mass flow rate is 1.5). After the reverse contact between water and materials, heavy hydrocarbons are discharged from the top of the heavy hydrocarbon washing tower, and water is pumped out from the bottom of the heavy hydrocarbon washing tower and reinjected into the syste...

Embodiment 3

[0029] In the previous process, the reaction mixture is removed from unreacted C4 and light components, and then mixed with water, using water as an entrainer to azeotropically separate acetic acid and sec-butyl acetate, at the bottom of the azeotropic distillation column That is the heavy hydrocarbon enrichment area. Referring to Fig. 2, extracting material from the bottom of the azeotropic rectification tower enters the lower part of the heavy hydrocarbon washing tower that water is housed in the tower, and the material mass flow rate is 100Kg / hr; The material mass flow ratio is 0. When the material is poured into the tower, the heavy hydrocarbon will be discharged from the top of the heavy hydrocarbon washing tower after the water fully contacts with the material. When the acid content in the heavy hydrocarbon is greater than 0.5%, the water in the heavy hydrocarbon washing tower is injected into the system, and water is replenished to the heavy hydrocarbon washing tower. ...

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Abstract

The invention discloses a separating method of impurity such as heavy hydrocarbon from reacting product in the acetate para-butyl making technique reacted by acetic acid and C4 olefin, which is characterized by the following: extracting materials from heavy hydrocarbon enriching area; contacting the material and water sufficiently; laminating the heavy hydrocarbon and water naturally; draining the heavy hydrocarbon; injecting water into the system again. The method can strip heavy hydrocarbon in the reacting product to prepare acetate para-butyl, which improves the quality of the product and modifies the operating condition to reduce the energy consumption.

Description

technical field [0001] The invention relates to a method for separating heavy hydrocarbons from reaction products in the process of preparing sec-butyl acetate by reacting acetic acid and C4 olefins. Background technique [0002] Second-butyl acetate, also known as second-butyl acetate and second-butyl acetate, is one of the four isomers of butyl acetate. It is a colorless, flammable, fruity-flavored liquid. It has the same properties as other isomers. Similar in most cases, can dissolve a variety of resins and organics. Its boiling point is lower than that of commonly used n-butyl ester and isobutyl ester, and its evaporation rate is faster. Mainly used as solvent, pharmaceutical industry, reaction medium, extractant component, metal cleaning agent, fruit flavor, etc. [0003] Compared with the traditional technology, using 1-butene and 2-butene as raw materials and reacting with acetic acid to prepare sec-butyl acetate has the advantages of wide source of raw materials a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/14C07C67/48C07C67/60
Inventor 胡先念李华席平翔
Owner HUNAN ZHONGCHUANG CHEM
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