Preparation By Hydrogen Halide Split-Off TRIZ Cases

Replacing caustic scrubbers with water washing and sulfuric acid drying suppresses 3,3,3-trifluoropropyne formation in HCFO and HFO production.

Metal oxide catalysis converts HCFC-225aa to HCFC-225ca at 290°C, avoiding halogen exchange byproducts common with aluminum halide systems.

Chlorinating 3,3,3-trifluoropropene above 2 bar pressure in the liquid phase to form 2,3-dichloro-1,1,1-trifluoropropane with selectivity exceeding 90 percent.

Replacing expensive starting materials with 2,3-dichloro-1,3-butadiene reduces production costs while maintaining high product selectivity.

Distillation separates 1,1,1,2,2-pentafluoropropane from heavy chlorinated impurities, preventing catalyst degradation and reducing waste.

Catalyst-free thermal pyrolysis converts hydrofluorochloropropanes to fluoropropenes, avoiding chlorine and reducing ozone depletion potential.

Integrated reactor system performs sequential hydrogenation and dehydrofluorination to produce fluorinated olefins while reducing energy consumption.

Alternating chlorination and dehydrochlorination reactions convert 1,3-dichloropropene into tetrachloropropene intermediates while reducing waste generation.

Replacing mercury with barium and phosphorus on activated carbon via polymerization improves catalytic activity while eliminating environmental pollution.

A catalyst-free dehydrohalogenation process converts halofluoroalkanes to fluoroolefins using caustic agents and controlled mixing power.

Segmented gas phase fluorination prevents catalyst inactivation during HFO-1234ze production, eliminating waste liquid from side reactions.

Controlling water content below 300 ppm maintains catalytic activity during continuous 2-chloro-3,3,3-trifluoropropene synthesis without selectivity loss.

A single reactor system combines chlorination and dehydrochlorination steps to produce 1,1,2,3-tetrachloropropene.

Blending pentachloropropane with hydrogen fluoride creates an azeotrope-like mixture that maintains constant boiling points despite unpredictable formation.

Optimized chromium oxide catalysts suppress unwanted isomer formation during dehydrofluorination, extending catalyst lifetime and improving yield.

A halopropene fluorination process using HF and Cl2 to produce HFC refrigerants.

Rapid contact with a heater surface above 850 F reduces carbon build-up, maintaining reactor uptime while converting HCFC-244bb to HFO-1234yf.

Sequential chlorination using polyvalent antimony and ferric chloride catalysts reduces reaction time and equipment costs for pentachloropropane production.

Sequential fluorination reactions in a single reactor reduce hydrogen chloride separation needs and heating energy requirements.

A catalyst comprising alpha-alumina and noble metals enables fluoroolefin hydrogenation with low chloride content.

Organic extractants alter relative volatility to separate 2,3,3,3-tetrafluoropropene from close-boiling azeotropes.

A two-step catalytic process converts pentachloropropane into 2,3,3,3-tetrafluoropropene using optimized HF reaction conditions.

Low alkali chromium oxyfluoride catalyst resolves the contradiction between high Z/E ratio and production efficiency in HFC-1225ye synthesis.

A two-stage gas-phase fluorination process converts chlorinated precursors into 2,3,3,3-tetrafluoropropene using sequential reactor stages.

Fluorination of 1-chloro-2,2-difluoroethane with hydrogen fluoride yields 1,1,2-trifluoroethane while maintaining high conversion and selectivity.

Dehydrofluorinating 3-chloro-1,1,2,2-tetrafluoropropane with an alkali accelerator to yield high-purity 1233yd.

Organic extraction agents enable extractive distillation of 1,1,1,2,2-pentafluoropropane to separate impurities with similar boiling points.

Mixed chromium and nickel catalyst on alumina support drives selective dehydrofluorination of HFC precursors.

Producing Z-1336mzz refrigerant through segmented steps with a copper catalyst, reducing production costs while maintaining high yield.

A crosslinkable polymer compound with defined repeating units enhances charge transport and structural integrity in light-emitting devices.

A segmented chemical process converts 1,2,3,4-tetrachlorobutane into high-purity 2,3-dichlorobutadiene through controlled dehydrochlorination and selective chlorination steps.

Static mixers vaporize chlorinated compounds in hot HF gas to prevent heat exchanger coking during fluorinated compound production.

A liquid-phase dehydrochlorination reaction converts 234bb into HCFO-1224yd using a base catalyst and solvent.

A nitrogen-containing carbon catalyst supported on an inorganic porous carrier enables efficient cracking of 1,2-dichloroethane at lower temperatures.

Anhydrous liquid phase reaction with homogeneous metal salt catalyst eliminates co-solvent needs, boosting yield and selectivity while reducing waste.

Ethers stabilize 1-Z-bromoalkene stereochemistry while enabling organomagnesium compatibility.

A catalyst enables chlorination of 3,3,3-trifluoropropene at lower temperatures.

Chlorocarbons exchange fluorine in antimony fluorohalide catalysts to produce chlorine-containing antimony compounds.

Matching boiling points prevents component separation during steam cleaning, ensuring reliable flash point control without frequent replenishment.

Chlorinated catalysts suppress competing dehydrofluorination to improve selectivity and yield of halogenated alkenes.

Segmenting the adiabatic reactor into zones with controlled thermal gradients maintains uniform temperature profiles and extends catalyst life.

A non-precious metal catalyst enables selective gas-phase hydrodechlorination of HCFC-244bb to produce HFO-1234yf at reduced temperatures.

Maintaining 0.01 to 10 vol% hydrogen chloride in the reactor inlet gas boosts conversion rates and reduces equipment costs for fluorine compound production.

Segmented real-time PCR with fluorescent probes differentiates mecA/mecC-MRSA from sensitive strains, resolving sensitivity-complexity trade-offs.

A continuous preparation method for 2,3,3,3-tetrafluoropropene using composite catalysts and membrane separation.