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Processing method and processing device of crylic acid and ester heavy components

A technology of acrylates and treatment methods, which is applied in chemical instruments and methods, preparation of carboxylic acid esters/lactones, separation/purification of carboxylic acid compounds, etc., and can solve problems such as waste of resources, high treatment costs, and incomplete recovery , to achieve high recovery rate, long-term stable operation, high economic and social benefits

Inactive Publication Date: 2012-06-27
李开明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, there are two main ways to deal with the heavy components of acrylic acid and esters: one is incineration and harmless treatment, which causes a waste of resources; the other is to sell them to qualified enterprises for resource treatment, but the treatment cost is higher or recycling Incomplete

Method used

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  • Processing method and processing device of crylic acid and ester heavy components
  • Processing method and processing device of crylic acid and ester heavy components
  • Processing method and processing device of crylic acid and ester heavy components

Examples

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Effect test

Embodiment 1

[0044] The heavy component of acrylic acid comes from an acrylic acid production enterprise. The sample is a black viscous liquid with a large viscosity coefficient and a certain pungent smell. It is collected and placed in storage tank 1. Send 1000g of acrylic acid heavy fraction into the spiral cracking furnace 2, raise the temperature to 140-160°C, distill and crack for 5 hours, cool it through the condensation system 3 and enter the fraction collector 4, the concentration of acrylic acid in the fraction is measured by gas chromatography-mass spectrometry, and the acrylic acid is calculated Purity is 98%, enters in the recycling pool 6 after being purified into high-purity acrylic acid through rectifying tower 5 then (purification is high-purity acrylic acid 673g, acrylic acid recovery rate is 99%), the residue after the distillation cracking enters residue collector 7. The whole process does not need to add any solvent, the process is simple, the recovery rate is high, and ...

Embodiment 2

[0052] The heavy component of butyl acrylate comes from an acrylic acid production enterprise. The sample is a black liquid with a certain pungent smell. Send 1000g of butyl acrylate heavy fraction into the spiral cracking furnace, raise the temperature to 170-225°C, distill and crack for 3 hours, cool it through the condensing system and enter the fraction collector, the concentration of acrylic acid in the fraction is measured by gas chromatography-mass chromatography, and the purity of acrylic acid is calculated 79%, and then purified into 559g of high-purity acrylic acid through a rectification tower, the recovery rate of acrylic acid is 99%, and the residue after distillation and cracking enters the residue collector. The whole process does not need to add any solvent, the process is simple, the recovery rate is high, and it has high economic and social benefits.

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Abstract

A processing method of crylic acid and ester heavy components includes the following steps: A) conducting distillation splitting on the crylic acid or the ester heavy components to enable the crylic acid or the ester heavy components to be converted into crylic acid steam; B) condensing and collecting the crylic acid steam; and C) purifying the collected crylic acid. The processing method is simple in process flow, high in recycle rate, high in purity, stable in long-term operation, capable of bringing high economical and environment benefits to society and worth popularizing in the market.

Description

technical field [0001] The invention belongs to the field of chemical environmental protection, and in particular relates to a method for treating heavy components of acrylic acid and esters. [0002] The invention also relates to a device for implementing the above method. Background technique [0003] Acrylic acid and its esters, as important industrial derivatives of propylene, have developed rapidly in recent years, greatly enriching people's lives. However, a large amount of acrylic acid or acrylate heavy components will be produced during the production process. The heavy component of acrylic acid is also called waste oil, which refers to the residue from the weight removal tower after being treated by the acrylic acid recovery system composed of dimer decomposition tank and thin film evaporator. It mainly contains acrylic acid dimer, polymerization inhibitor, horse lycic acid, a small amount of acrylic acid, and some other heavier components. The heavy component of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C57/07C07C57/04C07C51/487C07C51/44C07C51/09C07C51/00F27B17/00
Inventor 李开明
Owner 李开明
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