Production and properties of ethoxylated fatty alcohols with a narrow oligomer distribution / Produção e propriedades de álcoois graxos etoxilados com distribuição estreita de oligômeros

AUTOR(ES)
DATA DE PUBLICAÇÃO

1997

RESUMO

In the present work, developed in an association between University and Industry, different catalysts were evaluated, such as aluminum isopropoxide and Aliso B, for ethoxylation of laurilic alcohol, aiming to obtain narrowly distributed oligomers. The experiments were carried out in a pilot plant and the influence of temperature, catalyst concentration and molar relationship between acid (promoter of the reaction) and catalyst were evaluated. All the evaluations made were comparative, using for comparison the reaction and the products generated when potassium hydroxide is used as catalyst, which is commonly the case in industry. Initially we studied the charging of the reactional vessel in order to determine and optimize operational procedures. Then, we evaluated the influence of temperature on the ethylene oxide consumption rate, the oligomer distribution and the generation of glycol as a byproduct. We also evaluated the influence of catalyst concentration and molar relation of promoter : catalyst on the ethylene oxide consumption rate and on the generation of glycol. The evaluations were made for the ethoxylation reactions generating products with ethoxylation grades of 2, 3, 4 and 6 moles of ethylene oxide. Through the results, we have optimized processing conditions, considering the process limitations of industrial vessels for the generation of the desired product.

ASSUNTO(S)

catálise oligômeros physico chemistry físico-química catalysis oligomer fatty alcohol ethoxylation Álcool graxo etoxilado

ACESSO AO ARTIGO

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