Preparation By Dehalogenation TRIZ Cases

See how liquid-phase catalytic coupling of fluorinated propanes produces decafluorohexene with

See how controlled impurity removal in HCFO-1224yd(Z) working fluid achieves low ozone depletio

See how controlling Z-isomer purity and trace impurities in HCFO-1224yd working fluid resolves

Controlled HFO-1234yf blend compositions maintain refrigeration performance while lowering global warming potential in heat transfer uses.

Small amounts of selected co-compounds keep HFO-1234yf practical for low-GWP refrigeration while avoiding excessive purification complexity.

Defined HFO-1234yf blend ranges allow low-GWP refrigerants to be used with less purification while supporting heat-transfer performance.

A nickel-rich inner reactor layer resists hydrofluoric acid corrosion while enabling chromium-catalyzed fluorine redistribution in hydrocarbons.

A fluorination and dehydrohalogenation route makes HFO-1234yf from cheaper feedstocks, avoiding pentafluoropropane isolation while keeping high purity.

A two-reactor fluorination and distillation route improves fluoroolefin selectivity, cuts energy use, and supports flexible co-production.

Alternative Lewis acid and metal catalysts raise 1234yf selectivity and yield while avoiding antimony-driven corrosion and complex purification.

Controlling alkali, alkaline earth, and Si impurities in alumina catalysts raises fluorocarbon-to-fluoroolefin conversion and selectivity.

An in-situ precursor route avoids isolating costly pentafluoropropane while producing 2,3,3,3-tetrafluoropropene with high selectivity and purity.

Metal-catalyzed HCFO isomerization converts E-isomers to high-purity Z-1224yd or Z-1223xd while limiting by-products and easing distillation.

A two-step Lewis acid and activated carbon route simplifies tetrafluoropropene production while improving selectivity, purity, and scale-up.

Supported Ni, Pd, Pt, Ru, or Rh on activated carbon improves chlorofluoroethane reduction, raising fluoroethane conversion and selectivity.

Nitrogen-phosphorus modification disperses bimetallic alloy particles, helping dissociate hydrogen and activate C–Cl bonds while limiting sintering.

A fixed catalytic bed and selected feed compounds enable trifluoroethylene production from less-pure chlorotrifluoroethylene while maintaining yield and safety.

Supported metal nano catalyst mediates chlorotrifluoroethylene hydrodechlorination for continuous trifluoroethylene synthesis.

Co-feeding HFC-245cb elevates reactor pressure and improves mixing, resolving inadequate hydrochloric acid formation to boost conversion rates.

Periodic heating stages prevent premature catalyst degradation, resolving the trade-off between activation speed and stability to boost productivity.

Palladium catalyst on fluorided alumina converts CFC-215bb with hydrogen to produce HFC-1225ye, while azeotropic distillation recovers high purity product.

A supported carbon catalyst forms through a two-step chemical vapor deposition process using an organic silicon precursor.

Phase-transfer catalyzed dehydrofluorination transforms mixed HCFC isomers directly, bypassing complex distillation steps required for purification.

Reacting halopropanes with hydrogen fluoride using a fluorination catalyst to produce target compounds.

Organic extractants separate 2,3,3,3-tetrafluoro-1-propene from azeotropic impurities via extractive distillation, enabling high purity recovery.

Halogen acceptor compounds capture halogens from precursors, eliminating hydrodechlorination by-products in hexafluoro-2-butyne production.

Optimized metal halide catalysts convert HCFC-123a to CFO-1113 while suppressing trans-isomer by-products that complicate separation.

Fractionating brominated hydrocarbons separates monobromides from polybromides, reducing catalyst deactivation and compression costs.

Replacing aqueous KOH with potassium tert-butoxide resolves low yield contradictions in 3,3,3-trifluoropropyne synthesis.

Multi-step chemical process converts chlorofluoroalkanes into cis-hexafluoro-2-butene, addressing low production efficiency of readily available raw materials.

Diluting catalyst and feedstock moderates the highly exothermic hydrogenation of CFC-113, preventing catalyst deactivation and by-product formation.

Limiting organochlorine compounds to 350 ppm prevents etching rate degradation during continuous semiconductor processing.

Organic base catalyzed dehydrochlorination of 1,1,1,3-tetrachloropropane yields 1,1,1,2,3-pentachloropropane.

Co-feeding inert HFC-245cb into the fluorination reactor elevates pressure and enhances mixing, resolving inadequate hydrochloric acid formation.

Replacing hydrogen gas with organometallic or carbon-based reducing agents eliminates safety risks while maintaining high conversion yields.

Gas phase fluorination produces multiple low-carbon foaming agents while recycling hydrogen fluoride through dedicated separation columns.

Radical addition of cyclopentadiene to CXCl3 forms benzonorbornenes, replacing expensive ozonolysis steps.

Modified synthetic zeolites selectively adsorb water and C1-5 alkanes to purify trifluoroethylene without co-removing the target product.

Selective chlorination converts alpha-chlorine isomers into higher boiling compounds for easier separation from beta-chlorine products.

A two-step gas phase process converts hexafluoropropene and hydrogen into 2,3,3,3-tetrafluoropropene using sequential catalytic reactions.

Using polar aprotic solvents during zinc dechlorination of CFC-113 prevents HCFC-123a byproduct formation and improves yield.

Preventing zinc halide precipitation by controlling solubility limits improves hexafluoro-1,3-butadiene yield and reduces side reactions.

Organic extraction agent enables extractive distillation to separate 2,3,3,3-tetrafluoro-1-propene from azeotropic impurities.

A catalytic liquid phase fluorination process converts chloropropane intermediates into HFO-1234yf with high conversion efficiency.

Photochlorination converts unsaturated halocarbon impurities in 1234yf feedstock to saturated compounds.

Process adds carbon tetrachloride to 1,2-dichloroethylene then fluorinates the intermediate to produce HFO-1234ze while reducing production costs.

Alkali dehydrochlorination removes HCFO-1224xe impurities that destabilize HCFO-1224yd during purification.

Segmented palladium catalysis converts HCFC-235cb to HFC-1234yf, resolving scalability bottlenecks in low-GWP refrigerant manufacturing.

Replacing membrane separation with chlorinated solvent absorption recovers pentafluoroethane efficiently, reducing energy consumption and operational costs.