Preparation By Hydrogen Halide Split-Off TRIZ Cases

Uses alkaline absorption to separate HFO from carbon dioxide, avoiding severe low-temperature conditions.

Catalyst conditioning and reactant dilution minimize undesired byproducts during trans-1,2-difluoroethylene synthesis.

Carbon catalysts convert hydrochlorofluorocarbons to hydrochlorofluoroolefins, resolving low isomer selectivity in conventional processes.

Replacing chromium oxyfluoride with a composite catalyst raises conversion rates to 85-95% and selectivity to 90-98%, eliminating low-yield trade-offs.

A solvent-based mixing process creates uniform alkali metal halide-doped bivalent metal fluoride catalyst compositions.

Corrects color bleed factors through temporal fragment separation to resolve overlapping emission spectra and eliminate false peaks in STR analysis.

Extractive distillation with an organic agent separates 2,3,3,3-tetrafluoro-1-propene from impurities having similar boiling points.

A cooling method separates hydrogen fluoride from chlorinated hydrocarbons into distinct liquid phases for efficient purification.

A heat exchanger preheats the VCM plus EDC stream using hot fluid from later process steps.

Introducing an extractive agent alters vapor-liquid equilibrium to overcome azeotrope formation, enabling high-purity separation of fluoroolefins.

Liquid phase chlorination of 1,2-dichloropropane produces 1,1,2,3-tetrachloropropene while generating recoverable anhydrous HCl instead of aqueous waste.

Producing low global warming potential hydrofluoroolefins by converting chlorinated intermediates into final olefin products with high selectivity.

Merges reaction and distillation to eliminate multiple separation steps, improving yield and purity of 1,1,3,3-tetrachloropropene.

An integrated three-step process converts tetrachloropropene to HFO-1234yf without intermediate isolation.

Removing metal halide impurities from HFO-1234yf reactors via purging and oxidation to prevent selectivity changeover toward HCFO-1233xf byproducts.

Waste heat from chemical plant incineration heats the liquid medium to lower reaction temperatures, reducing fossil fuel consumption and CO2 emissions.

Fluorinating pentachloropropene with hydrogen fluoride in a gas phase reaction eliminates metal waste water and improves yield compared to liquid phase methods.

Alkali metal compounds supported on carbon catalyze dehydrochlorination of hydrochlorofluorocarbons, achieving product selectivity above 90 mole percent.

Dynamic temperature control between 310°C and 450°C prevents catalyst deactivation and maintains selectivity during 2,3,3,3-tetrafluoropropene production.

Aluminium fluoride catalysts convert CF3CH2CH2Cl to 1243zf, enabling easy regeneration and separation compared to chromium oxyfluoride systems.

Phase transfer catalysts enable high conversion rates at mild temperatures, reducing toxicity and degradation associated with harsh synthesis conditions.

Low sodium alumina catalysts resist fouling during dehydrohalogenation, extending operating cycles and simplifying regeneration.

Pressure-shift distillation separates E-HFC-1234ze from HFC-245fa and hydrogen fluoride azeotropes.