Preparation By Hydrogen Halide Split-Off TRIZ Cases

Transitioning from liquid to gas phase eliminates waste liquid generation while extending catalyst life during co-production.

A chromium-zinc oxide catalyst system enables gas phase fluorination with oxidizing agent regeneration.

Liquid phase fluorination of 1,1,3,3-tetrachloropropene with anhydrous hydrofluoric acid without a catalyst achieves high conversion rates under mild pressure.

Thermal decomposition of hydrofluorochloropropanes produces fluoropropenes with high selectivity, avoiding catalyst complexity and contamination.

A chromium oxide catalyst enables simultaneous dehydrofluorination and isomerization of pentafluoropropane to produce HFO-1234yf.

A segmented reactor enables precise temperature control for two-stage gas-phase fluorination of HCC-240fa to produce HFO-1234ze.

A solid catalyst mediates gas phase fluorination of halogenated C3 hydrocarbons to produce trans-1-chloro-3,3,3-trifluoropropene.

Selective freezing isolates HCFC-244bb from HCFO-1233xf mixtures, bypassing azeotrope constraints for pure refrigerant intermediates.

Replacing hydrogen gas with carbon-based reducing agents prevents catalyst deactivation and improves selectivity during HFO-1234yf synthesis.

Azeotropic distillation separates hydrogen fluoride from 3,3,3-trifluoropropene via phase transition, eliminating scrubbing waste.

Gas-phase catalytic dehydrochlorination eliminates aqueous waste and phase transfer catalysts while maintaining high selectivity for 1,1,2,3-tetrachloropropene.

Organic extraction agents modify relative volatility to separate 2,3,3,3-tetrafluoro-1-propene from impurities with similar boiling points.

A composition of 99% 1,1,1,2,3-pentachloropropane with controlled impurities enables catalytic fluorination to produce high purity F-1234yf.

Chromium oxyfluoride catalyzes halobutane conversion to internal fluorobutenes, resolving the trade-off between ozone safety and global warming potential.

Composite chromium-nickel catalyst on alumina support achieves high selectivity and conversion stability during dehydrofluorination.

An isomerization catalyst converts trans-HFO-1336 into the desired cis-isomer.

Chromium catalysts convert cis isomers to trans 1233zd refrigerants, resolving separation complexity while maintaining negligible ozone depletion potential.

Co-feeding hydrogen chloride elevates pressure and enhances mixing during liquid phase fluorination of HCFO-1233xf.

Preheating the heavy ends column feed with waste heat reduces reboiler thermal duty and cuts boiler energy consumption by up to 27.1 percent.

Fluorination in ionic liquid enhances HCFO-1233zd yield by minimizing catalyst deactivation from heavy by-products.

Metallic iron combined with phosphine ligands enables olefin insertion into haloalkanes, yielding HFO-1336ze and HCFO-1335zd with low global warming potential.

Chromium oxyfluoride catalyst drives selective dehydrochlorination of hydrochlorofluorocarbons, achieving product selectivity exceeding 90 mole percent.

A base-mediated dehydrohalogenation process converts hydro(halo)fluoroalkanes to (hydro)fluoroalkenes under mild conditions.

Solid acid catalysts enable high-selectivity dehydrochlorination of pentachloropropane, resolving the trade-off between production capacity and product purity.

Segmented reactors prevent azeotropic mixtures between 1233zd(E) and 245fa, enabling feasible separation of these fluorinated compounds.

A phase transfer catalyst facilitates fluorination of pentachloropropane with anhydrous HF to produce trifluoropropene.

Iron and rare earth metal precursors form a non-toxic catalyst that maintains high activity and long service life during halohydrocarbon fluorination.

Organic co-feed compounds suppress starting reagent polymerization and catalyst deactivation during vapor-phase fluorination, improving HFO-1234yf yield.

A trans-1-chloro-3,3,3-trifluoropropene solvent penetrates narrow spaces through low surface tension.

Purifying 1230xa feedstock removes impurities that degrade fluorination catalysts, extending operational life.

Solid catalyst converts ozone-depleting precursors to 1-chloro-3,3,3-trifluoropropene using hydrogen chloride, minimizing waste by-products.

Selective hydrogenation removes impurities from low-purity ethylene to prevent catalyst poisoning and reduce production costs.

A supersonic flow reactor pyrolyzes methane to generate acetylene for vinyl chloride synthesis.

An entrainer mediates separation of HFC-1234yf and hydrogen fluoride by forming a ternary azeotrope, resolving low relative volatility constraints.

Dehydroiodination of ethylene adducts recovers alkali metal iodide, avoiding equipment corrosion from high-temperature thermal decomposition.

Quenching vapor from 1,2-dichloroethane dissociation preheats feed streams and heats the HCl column, reducing energy consumption for heating feed DCE.

A gas-phase reaction process converts 1-halogeno-3,3,3-trifluoropropene with chlorine using a catalyst to produce 1,2-dichloro-3,3,3-trifluoropropene.

Removing the catalyst from the fluorination system eliminates high costs and low selectivity while maintaining high yield for industrial production.

An integrated process co-produces HCFO-1233zd, HFC-245fa, and HFO-1234ze from unsaturated hydrochlorocarbon feed materials.

Chromium catalysts convert cis-1233zd to trans-1233zd, resolving the trade-off between environmental acceptability and production efficiency.

Vinylidene fluoride inserts into perfluorinated diiodo compounds to form partially fluorinated monomers.

Fluorinated RF-olefin compounds extinguish fires via inerting, replacing ozone-depleting Halons to eliminate global warming potential.

Calcium oxide replaces calcium hydroxide for dehydrofluorination, eliminating reactor clogging and reducing moisture by-products.

Liquid-phase SiC microreactors reduce energy consumption by replacing gas-phase reactions and phase separation eliminates distillation.

Adding 1,1,1,2,3-pentachloropropane during cooling creates phase separation that recovers pure hydrofluoric acid without toxic solvents.

Segmented alkylation, dehydrochlorination, and chlorination zones prevent cumulative impurities while maintaining catalyst life.