Organic Compound Preparation TRIZ Cases

A two-stage glycol dehydration scheme reuses low-pressure steam from pre-dehydration to cut external steam demand and improve heat integration.

Lower-temperature Candida antarctica acylation preserves enzyme activity across multiple cycles while producing high-purity indenamine stereoisomer.

Branched bio-derived alcohol esterification reduces ester odor while keeping production practical and supporting cosmetic and detergent use.

Low-temperature Candida antarctica acylation separates indenamine stereoisomers while extending enzyme life for repeated cycles.

Specific alicyclic alcohol isomers create smooth, clear muguet and green floral notes while expanding fragrance variety with controlled quality.

A segmented pipe-and-nozzle feed unit spreads reactive monomer evenly in dual flow trays, reducing channeling, energy use, and fouling.

Multiple crystallization stages and mother liquor recycle raise acrylic acid purity while reducing absorption loss and impurity carryover.

A shared gas purification unit cleans both fresh and unreacted propylene, cutting IPA process columns, energy use, and operating cost.

Bromine-mediated oxidation plus solvent removal, heating, and distillation enables high-purity fluorenone with fewer by-products.

Spray drying or freeze drying with moderate heat keeps nickel nanoparticles uniformly dispersed in non-graphitizing carbon at high metal loading.

Cooling and staged separation recover unreacted lactic acid before oligomerization while isolating acrylic acid from biomass feedstock.

Different diphenylamine backbone substituents break C2 symmetry to tune electronic effects and improve enantioselectivity across asymmetric catalytic reactions.

A superheater keeps MEA vapor above its boiling point to stop recondensation, prevent reactor blockage, and sustain continuous N-vinylacetamide production.

Anti-surge and compressor flow valves stabilize ammonia or methanol loop pressure under variable renewable gas supply, reducing mechanical stress.

Adding calcium chloride and sodium hydroxide precipitates bicarbonate from MEG-water streams, preventing scaling and improving MEG recovery.

Staged reactor temperature and pressure control in continuous MDA hydrogenation helps tune isomer ratios while reducing by-products and energy use.

Controlling the isocyanate effective factor balances reactivity, strength, and weather resistance while suppressing yellowing in polyurethane elastomers.

A baffle-guided reacted-gas flow recovers heat while condensing product below dew point, improving reactor thermal efficiency.

Multi-stage fixed-bed hydrogenation with heat-exchange circuits controls PACM isomer ratios while improving conversion and energy efficiency.

A stable ammonium salt replaces an oily free acid intermediate, preserving purity and storage stability in bis(fluoroalkyl) benzodiazepinone synthesis.

A chiral, mild synthesis route replaces harsh multi-step chemistry to deliver a posaconazole intermediate with high yield and 99.5% ee.

Using synthesis gas and a Ru or Co solid catalyst, this case shows direct alkylamine production with high selectivity and fewer hydrocarbon by-products.

A P-N ligand transition-metal catalyst speeds hydrocyanation while improving selectivity and stability for adiponitrile production.

Adding formic acid or formate salts to hard irrigation water helps dissolve alkaline salts, reduce soil compaction, and improve water and fertilizer delivery.

Controlled hydroxyapatite particle size and P value improve acrylic acid yield, selectivity, and catalyst lifetime under harsh dehydration conditions.

Controlled glycol impurities and targeted distillation improve UV transmittance stability and enable tougher, low-temperature dyeable polyester.

Ambient 2-methyl THF extraction separates levulinic and formic acid from acidic brine with high recovery while avoiding fouling and high capital cost.

Base pretreatment before benzoic acid addition prevents hydroxyl impurities and enables scalable crystallization of high-purity 5-MeO-DMT benzoate.

Segmented inlet and outlet catalyst loading flattens reactor hot spots in olefin acetoxylation, improving selectivity, catalyst life, and yield.

Waste plastic is converted into recycled metaxylene and isophthalic acid using existing aromatics and oxidation facilities while maintaining product purity.

A base with pKa 4-15 suppresses enolate formation, enabling ester-to-alcohol hydrogenation while preserving alkenyl regiochemistry and geometry.

A bromide-ligated Pt-xanthene catalyst overcomes low hydroformylation yield by changing ligand composition to improve catalytic efficiency.

Metal fluoride converts carboxylic acid chloride to carboxylic acid fluoride without HCl formation, improving yield and simplifying production.

Independent reactor spaces let MDA hydrogenation continue while deactivated catalyst is replaced, reducing downtime and contamination.

Acid-catalyzed reaction of vanillin with aqueous formaldehyde enables high-purity divanillylmethane for bio-based epoxy resins.

Hydrolyzing monoacetate-containing fractions after distillation breaks azeotropes, raising 1,3- and 1,4-butanediol purity and recovery.

Continuous heat-exchanger activation turns amide organogelator mixtures into reproducible pastes while widening solvent choice and avoiding batch delays.

Controlled catalyst surface roughness improves aldehyde oxidation activity, limiting gas retention and agglomeration for stable carboxylic acid yield.

A transition-metal catalyst and base expand fluorovinyl amide synthesis beyond two-aromatic-ring substrates to support broader structural diversity.

Coexisting C1-6 alcohol stabilizes acrylic acid derivatives under heat, light, and oxygen by suppressing unwanted polymerization.

Tin-catalyzed solvent-free pyrolysis converts 1,4-butanediol polyesters into high-purity butadiene while reducing sorting and purification burden.

A serial reactor cascade keeps MDA hydrogenation running by replacing or regenerating only the deactivated catalyst bed.

Multi-stage catalytic hydrogenation and integrated heat circulation help produce PACM with low trans/trans content and lower energy use.

Closed-loop heat recovery and independently tempered reactors keep continuous MDA hydrogenation at low trans/trans isomer content.

Using alkoxylated alcohol to dissolve high-melting polyols enables single-stage reductive amination with lower energy use and fewer by-products.

Waste plastic pyrolysis oil is cracked into recycled propylene for cyclobutane diol polyester production, cutting waste and carbon emissions.

A TOPO-alkane extracting medium removes aliphatic alcohols from aqueous fermentation broth with less solvent, easier recycling, and lower energy use.

Acridinium photocatalysis enables regioselective arene C-H amination without directing groups or superstoichiometric oxidants.

Direct salting out from amphetamine sulfate avoids difficult distillation, reducing impurities, racemization risk, and yield loss.

Low-cost intermediates A and B simplify exatecan mesylate synthesis with milder steps, higher yields, and safer industrial production.

A tungsten oxide catalyst enables continuous gas phase oxidation of dimethylbenzene to produce terephthalaldehyde.

Carbon-supported transition metal catalysts oxidize tertiary amines to secondary amines with high efficiency.

Hydrolysis of bisphenol-A with limited caustic reduces chemical consumption while maintaining high recovery yields.

A heterogeneous catalyst comprising platinum group metals and transition metals converts adipic acid to 1,6-hexanediol under mild conditions.

Deuterated methanol prevents salt accumulation and reduces methyl isobutyrate byproducts during methyl methacrylate production in a fixed bed reactor.

Direct formamidation of 1,3-dimethyladamantane avoids toxic halogenation and reduces disposal costs.

Enzymatic epoxidation converts olefins to epoxides for direct esterification, eliminating costly diol intermediates and complex purification steps.

A metal-treated chemically-modified solid oxide catalyzes olefin and carbon dioxide coupling to form acrylic acid derivatives.

Fluorocarbon resin coating prevents fouling precipitate buildup on reactor walls, maintaining high throughput production.

Composite metal salts of hydroxycinnamic acids stabilize plastics against thermal volatility and oxidative damage.

Recycles high-pressure condensate from aromatic acid pre-heating into boiler feed water, eliminating flash drums and reducing fuel costs.

Simultaneous dehydration and oxidation of alcohols eliminates separate reaction steps, reducing process complexity and energy consumption.

Continuous distillation separates ammonium polyvanadate from high boiling materials, preventing pipe clogging while recycling the catalyst for reuse.

Aqueous acrylamide solution production uses trace propionitrile and acetonitrile additives to suppress unwanted polymerization during biocatalytic hydrolysis.

A heterogeneous rhenium catalyst converts biobased aldaric acids into adipic acid esters and muconic derivatives.

A reactive distillation column converts aliphatic alcohols into alkenes using acid catalysts and ether recycling.

Recycling anhydrides eliminates chloride waste and reduces COD in peroxyester synthesis.

Segmenting molecular weight across multiple branches minimizes impurity formation during synthesis while maintaining high purity for bio-modification.

Hybrid isophthalate plasticizer composition minimizes volatile loss and migration while maintaining flexibility.