Purification of Sulfite Pulp with Air in Caustic Soda Medium

Pneumothorax following inhalation of caustic soda fumes.

new family home. He accidentally leant over the bucket and inhaled the fumes produced by the solution. Five minutes after the inhalation, he developed persistent pleuritic, right-sided chest pain and breathlessness. There was no personal or family history of pulmonary disease, and he had never smoked. Physical abnormalities were confined to the chest. He had a respiratory rate of 30 a minute an...

The larynx and caustic soda ingestion.

Regeneration of Caustic Soda Etch Solutions for Aluminum

A system for the regeneratlon of caustic soda solutlons used In etching aluminum Invokes the hydrolysis of sodium aluminate to llberate free sodium hydroxide and produce a dry, crystalllne hydrated alumlna byproduct. The system has been used extenslvely In Japan, and, by adjusting process parameters, can be adapted to North American practice. By otlllting the system in a typical plant, soild ai...

Bioproducts from sulfite pulping : Bioconversion of sugar streams from pulp , sludge , and spent sulfite liquor

The production of singleand mixed-sugar streams and their conversion to bioproducts were studied using sulfite pulping streams as feedstocks. Sulfite pulp, sludge, and spent sulfite liquor (SSL) were utilized because they are concurrently generated alongside of bleached pulp, and because the pulping process renders pretreatment unnecessary. SSL, comprised of mostly monomeric hexose and pentose ...

Hydrogen peroxide and caustic soda: Dancing with a dragon while bleaching

When hydrogen peroxide is mixed with caustic soda, an auto-accelerating reaction can lead to gen­ eration of significant amounts of heat and oxygen. On the basis of experiments using typical pulp mill process con­ centration and temperatures, a relatively simple kinetic model has been developed. Evaluation of these model results reveals that hydrogen peroxide-caustic soda systems are extremely ...