Factors influencing chromium recovery from chromium sulphate tanned leather scrap ashes

• Tipo: Artigo em Revista Científica Internacional
• Data: 2003

Autores

S. Carneiro (Autor) Outra; M. F. Almeida (Autor) FEUP; M. J. Ferreira (Autor) Outra

Revista

Título: Journal of the Society of Leather Technologies and Chemists

Vol. 87 Nº 1

Páginas: 1-10

ISSN: 0144-0322

Editora: Society of Leather Technologists and Chemists

Indexação

ISI Web of Knowledge - 4 Citações

Scopus - 6 Citações

Classificação Científica

CORDIS: Ciências Tecnológicas > Tecnologia > Tecnologia ambiental ; Ciências Tecnológicas > Tecnologia > Tecnologia de materiais > Tecnologia da reciclagem

Outras Informações

ID Authenticus: P-000-K2S

Abstract (EN): Basic chromium salt is the main tanning reagent used all over the world and it represents one of the most important applications of chromium salts. When leather scrap tanned with chromium sulphate is burned, the respective ashes contain meaningful amounts of chromium, some of it in the hexavalent form. This paper presents some efforts aimed at using the ashes from a fixed grate incinerator (FGI) as a source of chromium for various applications. Two types of ashes were characterised. Several tests with mixtures of alkaline and alkaline earth fluxes followed by hot washing the product were carried out to recover chromium from the ashes. The factors influencing chromium recovery were screened through an experimental design approach and hypothesis testing. Using ashes as pigment for ceramic glazes was also evaluated.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 10