Amine Functionalized Anion Exchange Resin for CS2 Removal
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Solution Overview
Problem
Current methods for reducing carbon disulphide (CS2) in hydrocarbon feeds are inefficient, leading to low yields and byproduct removal issues, affecting downstream refinery processes and catalyst poisoning.
Innovation Solution
Treating hydrocarbon feeds with an amine functionalized anion exchange resin at specific temperature and pressure conditions to form a solid adduct, which is then separated, reducing CS2 content to acceptable levels, and regenerating the resin for repeated use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional methods (adsorption treatment, hydrodesulphurization, amine solution treatment) are used to remove CS2, then CS2 removal is achieved, but the process efficiency is low and byproduct removal is problematic
Solution Approach 1:
The invention uses a composite material consisting of amine-functionalized anion exchange resin combined with hydrophobic porous material (such as hydrophobic porous polymer or hydrophobic porous inorganic material). This composite structure combines the CS2 binding capability of the amine functional groups with the hydrophobic selectivity and structural stability of the porous material, achieving both high CS2 removal efficiency and process productivity while minimizing byproduct formation
Solution Approach 2:
The invention employs hydrophobic porous materials as the support matrix for the amine functional groups. The porous structure provides high surface area for CS2 adsorption and reaction, while the hydrophobic character of the pores enhances selectivity for CS2 over other compounds in the hydrocarbon feed, thereby improving both removal precision and process efficiency
2Manufacturing precision
If conventional treatment methods are applied, then CS2 is removed, but catalyst poisoning occurs in downstream hydrotreating processes
Solution Approach 1:
The invention effectively extracts and removes CS2 from the hydrocarbon feed using the amine-functionalized anion exchange resin. The amine groups specifically bind CS2 to form stable adducts, which are then separated from the hydrocarbon stream. This thorough extraction prevents CS2 from reaching downstream catalysts, eliminating the catalyst poisoning problem while achieving the required CS2 concentration reduction
3Manufacturing precision
If existing removal methods are used, then some CS2 is reduced, but the process is complex and not easily controllable
Solution Approach 1:
The invention operates under mild and controllable parameters: ambient to slightly elevated temperatures and atmospheric pressure conditions. The amine-functionalized anion exchange resin can be easily controlled by adjusting flow rate and contact time. These parameter changes simplify the process design and operation while maintaining high CS2 removal precision, making the process easily controllable and reducing device complexity
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
Effectively reduces CS2 levels from over 6 ppm to less than 2 ppm, maintaining high yields and resin activity for multiple cycles, with eco-friendly and easily controllable conditions.
Implementation Method 1
the solid mass comprises an adduct of CS2 and the amine functionalized anion exchange resin
Implementation Method 2
treating the hydrocarbon feed with an amine functionalized anion exchange resin
Data Source
AI summary
The present disclosure relates to a process for reducing the amount of carbon disulphide (CS2) in a hydrocarbon feed containing C5-C8 fractions. The hydrocarbon feed is treated with an amine functionalized anion exchange resin (basic anion exchange resin) to obtain a mixture comprising a liquid fraction containing treated hydrocarbon and a solid mass containing an adduct of CS2 and the amine functionalized anion exchange resin. The so obtained liquid fraction containing the treated hydrocarbon is separated from the solid mass to obtain the hydrocarbon having CS2 content less than 2 ppm. The amine functionalized anion exchange resin can be regenerated from the solid mass.