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Continuous refining system for esterification reaction products

A technology for esterification reaction and products, which is applied in the system field of continuous purification of esterification reaction products, and can solve problems such as leakage

Pending Publication Date: 2021-06-11
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, despite the compatibility with PVC and excellent softness-imparting properties of phthalate plasticizers, there is still controversy about the harmful properties of phthalate plasticizers because when used in real life When using PVC products that contain phthalate plasticizers, phthalate plasticizers can gradually leak out of the product and act as suspected carcinogens of endocrine disruptors (environmental hormones) and heavy metal levels Substances (NR Janjua et al., "Systemic Uptake of Diethyl Phthalate, Dibutyl Phthalate, and Butyl Paraben Following Whole-body Topical Application and Reproductive and Thyroid Hormone Levels in Humans", Environmental Science and Technology 2008, 42, 7522-7527)

Method used

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  • Continuous refining system for esterification reaction products
  • Continuous refining system for esterification reaction products
  • Continuous refining system for esterification reaction products

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Experimental program
Comparison scheme
Effect test

Embodiment approach

[0044] According to one embodiment of the present invention, the system may also include:

[0045] Mixed alcohol separation tower 5, the mixed alcohol separation tower 5 comprises: mixed alcohol supply unit 52, this mixed alcohol supply unit 52 connects the alcohol-rich stream outlet 24 of distiller 2 and the alcohol outlet 34 of product purifier 3; 55, discharge water from the upper removal unit 55; middle discharge unit 54, discharge lower alcohol from the middle discharge unit 54; and lower discharge unit 53, discharge higher alcohol from the lower discharge unit 53; and

[0046] Waste water treatment tank 6, waste water treatment tank 6 comprises: lower alcohol wastewater pipeline 62, lower alcohol wastewater pipeline 62 is connected with the second outlet 14 of neutralizer 1; higher alcohol supply pipeline 63, higher alcohol supply pipeline 63 is separated from mixed alcohol The lower discharge unit 53 of the tower 5 is connected; a waste water treatment space 61 in which...

Embodiment

[0103] The content of residual alcohol in the waste water produced when using the conventional batch purification process was compared with the content of residual alcohol in the waste water produced when using the continuous purification process of the present invention. In a conventional batch purification process, all unpurified product mixtures are transferred to a prior art neutralizer without a partition wall, and then an appropriate amount of alkaline aqueous solution as a neutralizer is added thereto. Then, the mixture is stirred to complete neutralization. Thereafter, the neutralized unpurified product mixture is all transferred to a separate layer separation device to separate the aqueous layer, and then transferred to another separate wastewater treatment tank for higher alcohols, resulting in a waste water.

[0104] The unpurified product mixtures used in the purification process were identical to each other and contained butanol. Finally, the content of residual...

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Abstract

The present invention relates to a continuous refining system for esterification reaction products, and a continuous refining method which is for esterification reaction products and can be performed via the continuous refining system. The continuous refining system comprises a neutralizer, a distiller, and a product refiner. The inner space of the neutralizer is divided in the left-right direction into a neutralizing space and a layer separating space, and is provided with at least one partition wall so that a path connecting the two spaces is formed, wherein the path starts from the upper portion of the neutralizing space. The present invention can reduce the amount of low grade alcoholic waste water generated during refinement, while enabling an efficient continuous refining process.

Description

technical field [0001] Cross References to Related Applications [0002] This application claims the benefit of Korean Patent Application No. 10-2019-0039718 filed at the Korean Intellectual Property Office on April 04, 2019, the disclosure of which is incorporated herein by reference in its entirety. [0003] technical field [0004] The present invention relates to a system for continuous purification of esterification reaction products. Background technique [0005] By the 20th century, phthalate plasticizers had occupied 92% of the world plasticizer market (Mustafizur Rahman and Christopher S. Brazel "The plasticizer market: an assessment of traditional plasticizers and research trends to meet new challenges", Progressin Polymer Science 2004, 29, 1223-1248), and become an additive for improving the processability of polyvinyl chloride (hereinafter referred to as PVC) by imparting flexibility, durability, cold resistance, etc. and reducing the viscosity during meltin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/54C07C67/60C07C67/62C07C67/03
CPCC07C67/54C07C29/86C02F1/40C02F2101/34B01D3/143C07C69/82C07C31/12C07C67/60C07C67/62C07C67/03Y02P20/582
Inventor 金显圭李成圭田炯陈赞携文正周金宙镐
Owner LG CHEM LTD