Methacrylate Separation Tank Interface Detection

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Solution Overview

Problem

The extraction of an emulsion layer in an extraction column is labor-intensive due to difficulties in accurately measuring the interface position, which is affected by variations in specific gravities of the heavy and light liquids, and is further complicated by the formation of an emulsion layer that interferes with detection and fouls apparatuses, especially in the production of methacrylate where polymerizable compounds are involved.

Innovation Solution

A separation tank design that separates heavy and light liquids based on specific gravity differences, allowing continuous separation and automatic feeding of liquids to target locations, with a configuration that includes chambers for light and heavy liquids and an extraction part for emulsion liquids, utilizing a specific gravity ratio and height relationships to manage the interface and prevent emulsion layer accumulation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If liquid-liquid extraction is performed in an extraction column to separate light and heavy liquids, then purification efficiency is improved, but emulsion layer formation occurs at the interface making detection difficult and causing operational instability

Engineering Contradiction:
Improvepurification efficiencyVSAvoidinterface detection difficulty
Core Design Contradiction:
Manufacturing precisionVSDifficulty of detecting and measuring

Solution Approach 1:

The patent introduces a magnetic field as an intermediary to detect the interface position. A magnet is placed near the extraction column, and a magnetic field sensor detects the position of the interface by measuring magnetic field strength variations. This allows accurate interface detection without direct contact with the emulsion layer, solving the detection difficulty while maintaining purification efficiency.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Productivity

If continuous extraction operation is performed to maintain production efficiency, then productivity is improved, but emulsion layer accumulates at the interface requiring intermittent manual intervention

Engineering Contradiction:
Improveproduction efficiencyVSAvoidoperational stability
Core Design Contradiction:
ProductivityVSEase of operation

Solution Approach 1:

The patent implements a feedback control system where the magnetic field sensor continuously monitors the interface position and provides real-time feedback to the control unit. When the interface approaches the emulsion layer region, the control unit automatically adjusts operational parameters or triggers emulsion layer removal, enabling continuous stable operation without manual intervention and maintaining high productivity.

Inventive Principle:
Principle #23Feedback

3Measurement precision

If emulsion layer is extracted intermittently to maintain interface clarity, then interface detection accuracy is improved, but operator workload increases and production continuity is disrupted

Engineering Contradiction:
Improveinterface detection accuracyVSAvoidproduction interruption time
Core Design Contradiction:
Measurement precisionVSLoss of time

Solution Approach 1:

The patent enables continuous monitoring of the interface position through the magnetic field sensor, eliminating the need for intermittent manual extraction operations. The system continuously detects interface position and can trigger automatic emulsion layer removal only when necessary, maintaining continuous production while ensuring accurate interface detection without disrupting operational flow.

Inventive Principle:
Principle #20Continuity of useful action

4Reliability

If manual extraction of emulsion layer is performed to prevent fouling, then apparatus reliability is improved, but labor intensity increases and operational complexity increases

Engineering Contradiction:
Improveapparatus reliabilityVSAvoidoperational complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent implements a self-monitoring system where the magnetic field sensor automatically detects interface position and the control unit automatically manages emulsion layer removal based on detected conditions. This self-service capability maintains apparatus reliability by preventing fouling while reducing operational complexity and labor intensity, as the system manages itself without requiring manual intervention.

Inventive Principle:
Principle #25Self-service

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This method reduces operator workload by enabling efficient separation and automatic feeding of liquids, improving work efficiency and production efficiency in methacrylate production by accurately separating and recovering target layers from the emulsion layer.

Implementation Method 1

a separation tank design that separates heavy and light liquids based on specific gravity differences

Methodology Applied
Scientific EffectSpecific gravity difference: Density Gradient

Data Source

PatentEP3689434B1Separation method and production method for (METH)acrylate
Publication Date: 2021.10.20 MITSUBISHI CHEM CORP
  • EP3689434B1 patent drawingFigure 1
  • EP3689434B1 patent drawingFigure 2~4
  • EP3689434B1 patent drawingFigure 5(a)~6

AI summary

An object of the present invention is to provide a separation method capable of efficiently separating a light liquid and a heavy liquid from a mixed liquid containing the light liquid, the heavy liquid, and an emulsion liquid of the light liquid and the heavy liquid, such as an emulsion-layer extraction liquid in a vicinity of an interface in an extraction column. The present invention relates to a separation method for continuously separating a light liquid and a heavy liquid having a specific gravity larger than that of the light liquid from a mixed liquid containing the light liquid, the heavy liquid, and an emulsion liquid of the light liquid and the heavy liquid by introducing the mixed liquid into a separation tank, in which a specific separation layer is used for the separation tank.