Pulp Bleaching TRIZ Cases

See how engineered metalloproteases from Paenibacillus species maintain proteolytic activity ac

See how modified metalloprotease sequences maintain proteolytic activity across pH 5-10.5 and 4

See how modified metalloprotease sequences maintain activity across pH 4.5-10 and 30-70°C to im

Oxygen nanobubbles improve cellulose bleaching by distributing oxygen uniformly in pulp suspension and sustaining faster lignin reaction.

Chlorine dioxide and a nitroxyl radical combine delignification and cellulose oxidation in one step, cutting organohalides, energy use, and effluent.

Using sodium sulphate as the main make-up chemical helps pulp mills replace sodium losses, cut caustic use, and reduce fly ash dumping.

Biphasic ionic liquid systems separate lignin and cellulose from biomass, eliminating water use to reduce environmental impact.

A paper pulp bleaching process combines chlorine dioxide and hydrogen peroxide in an alkaline medium to optimize delignification efficiency.

A model calculates oxidizing agent dosages for pulp bleaching cycles using sequence kappa factors and total equivalent chlorine metrics.

Delaminating wood particles before refining reduces refiner energy consumption, achieving higher bleaching brightness with improved mechanical properties.

Sequential chlorine dioxide and sodium hypochlorite treatment degrades fluorescent agents in recycled pulp slurry.

Segmented oxygen delignification and multi-stage bleaching resolve the trade-off between production cost and fiber whiteness for downstream applications.

Catalytic oxidation increases carbonyl content in cellulose, improving odor control while maintaining fiber strength.

Segmenting defibration from fibrillation while applying treatment agents reduces energy dissipation and improves pulp quality.

Diluted acetic acid and supercritical N2O treat cotton straw to remove lignin, reducing bleaching time and processing costs.

High consistency refining followed by alkaline peroxide treatment and low consistency refining.

Magnesium hydroxide buffers pH in softwood pulp bleaching stages, resolving NaOH instability and improving dirt removal.

Peracetate oxidant generates singlet oxygen to selectively oxidize lignin, reducing chlorine dioxide use by 97% while preserving fiber strength.

Date palm seed powder forms transparent discs via delignification and bleaching, then hardens with epoxy resin.

Cellulase treatment of dissolving pulp reduces chemical usage while enabling precise viscosity control through preliminary enzymatic action.

Modified kraft pulping and bleaching process enhances alpha-cellulose content in softwood fibers.

Adding carboxymethylcellulose during the acid stage of bleaching enhances tensile strength and water retention properties.

Vapor phase chemical preconditioning replaces mechanical compression in lignocellulosic pulping to reduce energy consumption while developing pulp brightness.