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Piperyene cis and trans isomer separating method

A trans-isomer and separation method technology, applied in the separation of trans-isomer and cis-form piperylene, can solve problems such as difficult industrial application

Inactive Publication Date: 2006-11-22
SINOPEC SHANGHAI PETROCHEMICAL CO LTD
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0005] The invention provides a method for separating the cis- and trans-isomers of piperylene, which adopts the extraction and rectification technology commonly used in industry, and solves the technical problem that the existing similar separation methods are difficult to realize industrial application

Method used

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  • Piperyene cis and trans isomer separating method

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Embodiment 1～5

[0021] The piperylene raw material whose composition is shown in Table 1 is preheated to 40-50° C. and then enters an extractive distillation column for extractive distillation. The extractive distillation column is a packed column with 45 theoretical plates. The piperylene raw material enters the extractive distillation column from the 32nd tray at a rate of 400g / h, and the extractant is fed from the 4th tray. The extractive distillation towers of each embodiment are operated under normal pressure, and other main extractive distillation operating conditions are shown in Table 2.

[0022] Trans-piperylene was obtained at the top of the extractive distillation tower, and the product purity is shown in Table 4. The extractive distillation tower bottom material enters a rectification tower subsequently to carry out rectification, and the rectification tower is a packed tower, and the number of theoretical plates is 7, and the feed inlet is positioned at the 5th plate, and each em...

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Abstract

This invention discloses a chicken gel food and the method for making the same. The procedures comprise: mix the minced chicken breast with salt solution, and send to the colloidal mill, after degassing, add in compound microcosmic salt, extract at 0-6Deg C for 24-58 hours, filtrate and separate the supernatant by centrifuging, add kara gel and calcium chloride to the supernatant, adjust the pH between 6.0 and 7.5, then heat in the 60-90Deg C water bath for 15-45min, cool to the room temperature and obtain the chicken gel food. This invention enriches the cryogenic chicken food, fills the blank of the market, and is innovative. This invention can promote the finely processing of the chicken product, provide a new way for the finely processing of chicken food, improve the added value, solve the social problem of 'hard chicken sale', and accelerate the domestic animal industry development.

Description

technical field [0001] The invention relates to a method for separating the cis and trans isomers of piperylene, in particular to a method for separating the cis and trans isomers of piperylene by extractive distillation. Background technique [0002] Piperylene is one of the main conjugated diolefins in the C5 fraction of petroleum cracking, and it is usually used as a polymerization monomer and fine chemical raw material in industry. It has cis and trans isomers, and the ratio of cis and trans isomers in piperylene obtained from petroleum cracking carbon five fractions is generally between 1: (1.5 to 3). between. [0003] For the polymerization under different reaction conditions, the two isomers of piperylene will exhibit different chemical properties, such as anionic catalysts, Ziegler-Natta catalysts or transition metal catalysts can only polymerize the trans isomer, The cis-isomer did not participate in the reaction; both the sodium alkoxide catalyst and the free rad...

Claims

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Application Information

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IPC IPC(8): C07C11/173C07C7/04
Inventor 傅建松张冬梅王雅辉吴忠平
Owner SINOPEC SHANGHAI PETROCHEMICAL CO LTD
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