Preparation process of electronic grade propylene

A preparation process, electronic-grade technology, applied in the field of preparation of electronic-grade propylene, can solve the problems of large amount of extractant, complicated separation process, increased energy consumption, etc., and achieve the effects of reduced energy consumption, good separation effect, and reduced consumption

Pending Publication Date: 2022-05-27
PERIC SPECIAL GASES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Application number 2014104618361 uses extractive distillation to separate propane and propylene, but chooses to extract the main component propylene, the subsequent separation process is complicated, energy consumption is increased, and the amount of extractant is large
At the same time, although the extraction and rectificati

Method used

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  • Preparation process of electronic grade propylene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0036] Example 2, propylene feed gas into the lower part of the washing tower T101 at a flow rate of 100g / min, the extractant cyclohexane into the upper part of the washing tower T101 at a flow rate of 80g / min, the number of theoretical plates of the washing tower T101 is 30 pieces, and the operating pressure is 1.0MPa.

[0037] The bottom of the T101 tower of the washing tower was obtained with a mixture of propane and extractant, passed into the flash tank T102, atmospheric pressure operation, the operating temperature was 5 °C, the top of the flash tank T102 tower was further processed and collected by propane logistics, and the bottom of the flash tank T102 tower was obtained by the pure extractant and regularly recycled into the upper part of the washing tower T101.

[0038] The top of the washing tower T101 gets the propylene that removes propane into the light tower T103, the theoretical plate number is 30, the reflux ratio is 50, the top temperature of the tower is 5 °...

Embodiment 3

[0040] Example 3, propylene feed gas into the lower part of the washing tower T101 at a flow rate of 100g / min, the extractant cyclohexane into the upper part of the washing tower T101 at a flow rate of 150g / min, the number of theoretical plates is 30, and the operating pressure is 1.0MPa.

[0041] The bottom of the t101 tower of the washing tower was obtained with a mixture of propane and extractant, passed into the flash tank T102, atmospheric pressure operation, operating temperature 5 ° C, the top of the flash tank T102 tower was further processed and collected, and the bottom of the flash tank T102 tower was obtained by the pure extractant and regularly recycled into the upper part of the washing tower T101.

[0042] The top of the washing tower T101 obtains the propylene that removes propane into the light tower T103, the theoretical number of plates is 30, the reflux ratio is 50, the top temperature of the tower is 5 °C, and the top pressure of the tower is 1.0MPa.

[00...

Embodiment 4

[0045] Example 4, propylene feed gas, at a flow rate of 100g / min into the lower part of the washing tower T101, the extractant cyclohexane into the upper part of the washing tower T101 at a flow rate of 200g / min, the number of theoretical plates 30, the operating pressure of 1.0MPa.

[0046] The bottom of the t101 tower of the washing tower was obtained with a mixture of propane and extractant, passed into the flash tank T102, atmospheric pressure operation, operating temperature 5 ° C, the top of the flash tank T102 tower was further processed and collected, and the bottom of the flash tank T102 tower was obtained by the pure extractant and regularly recycled into the upper part of the washing tower T101.

[0047] The top of the washing tower T101 obtains the propylene that removes propane into the light tower T103, the theoretical number of plates is 30, the reflux ratio is 50, the top temperature of the tower is 5 °C, and the top pressure of the tower is 1.0MPa.

[0048] The...

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PUM

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Abstract

The invention provides a preparation process of electronic grade propylene, which comprises the following steps of: firstly, introducing propylene raw material gas into the lower part of a scrubber tower, and obtaining a mixture of propane and an extracting agent at the tower bottom of the scrubber tower; the generated mixture is introduced into a flash tank, propane gas is obtained at the top of the flash tank, a pure extractant substance is obtained at the bottom of the flash tank, propylene without propane is obtained at the top of a scrubber tower, the propylene is introduced into a light component removal tower, light component impurities are obtained at the top of the light component removal tower and are treated and discharged, and propylene without light component impurities is obtained at the bottom of the light component removal tower; and introducing the obtained propylene into a de-heavy tower to obtain an electronic-grade propylene product at the top of the de-heavy tower. Propane impurities which are difficult to separate by conventional rectification in the raw material propylene are separated by utilizing an extraction gas washing method, so that the overhigh operation pressure, reflux ratio and number of tower plates are avoided, the energy consumption is greatly reduced, the process route is safe and reliable, the product quality is controllable, and large-scale industrial production is easy to realize.

Description

Technical field [0001] The present invention belongs to the field of propylene preparation process technology, specifically relates to a kind of preparation process of electronic grade propylene. Background [0002] Electronic grade propylene is a new type of material that appears in the development of semiconductor technology. Mainly used in the integrated circuit manufacturing process, as a film-forming gas, the main role is amorphous silicon carbon growth. Electronic grade, research grade propylene purity requirements of at least 99.99%, in addition to water, oxygen, carbon monoxide, carbon dioxide and C1-C4 components and other impurities have specific purity requirements, the establishment of a stable purification system can prepare electronic grade propylene. [0003] Among the various impurities of propylene raw materials, propane is a component that is more difficult to remove. Due to the small boiling point difference and relative volatility of propylene-propane, the num...

Claims

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Application Information

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IPC IPC(8): C07C7/10C07C7/04C07C11/06
CPCC07C7/10C07C7/04C07C11/06Y02P20/10
Inventor 徐海云花宝曦张琴郑旭阳鲁毅李海军张龙
Owner PERIC SPECIAL GASES CO LTD
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