MUMBAI, India, June 22 -- Intellectual Property India has published a patent application (202531031067 A) filed by Indian Institute Of Technology Kharagpur on March 29, 2025, for A Chemically Robust Microporous Zn-Mof For C2h2 Separation From Co2 And Industrially Relevant Four Component Gas Mixtures.

Inventors include Dr. Madhab C Das; Bikram Pramanik; and Rupam Sahoo.

The application for the patent was published on June 12, 2026, under issue no. 24/2026.

Abstract: Abstract Title: A Chemically Robust Microporous Zn-MOF for C2H2 Separation from CO2 and Industrially Relevant Four Component Gas Mixtures The invention scopes a 3D-microporous metal–organic framework (MOF) comprising Zn-based metal–organic interpenetrative framework of mixed ligands of formula {[Zn2(H4L)(bpe)]·3DMF·H2O}n having dimeric zinc metal core three dimensionally coordinated with 1,2,4,5-tetrakis[(4-carboxy)phenoxymethyl] benzene (H4L), and 1,2-Di(4-pyridyl)ethylene (bpe) as bridging ligands dictating porosity controlled channels of 4.6×5.2Å2 and 2.8×3.2Å2 in said framework enabling a robust sorbent material adapted to improve separation selectivity and purification of select C2 hydrocarbon molecules from multi-component gas mixtures at ambient temperature. The metal–organic framework exhibits three times higher uptake capacity for C2H2 of (43.6 cc g-1) than competing CO2 (15.3 cc g-1) gas with increased separation selectivity of 13.9 and lower isosteric heat of adsorption (Qst) of -29.2 kJ mol-1 and improved productivity of acetylene gas of 99% purity in a binary gas mixture of C2H2/CO2 (50:50) under ambient conditions. Also the developed MOF is capable of providing high C2H2/CO2 uptake ratio as exhibited by improved C2H2 uptake in between 43-52 cm3g?¹ compared to low CO2 uptake in between 15-23 cm3g?¹ at 295-273 K and 1 bar, in a quaternary gas mixture of C2H2/C2H4/C2H6/CO2 (25:25:25:25) (v/v). A gas separation system is also developed by incorporating said 3D-microporous Zn-based MOF in a gas adsorption/desorption column for providing improved selective separation and recovery of select hydrocarbons preferably acetylene in a cost-effective energetically favorable and environment-friendly technique.

Disclaimer: Curated by HT Syndication.