A carregar...
Publicação
Parâmetros relevantes e implicação no processo de produção de clomazona
| Nome: | Descrição: | Tamanho: | Formato: | |
|---|---|---|---|---|
| 5 MB | Adobe PDF |
Orientador(es)
Resumo(s)
Os micro encapsulados encontram-se nos dias de hoje bastante presentes no setor da agricultura para a proteção de plantações, na forma de produtos agroquímicos, possuindo a capacidade de preservar a substância ativa, libertando-a controladamente e aumentando a eficiência do produto.
O presente trabalho destina-se à avaliação dos parâmetros relevantes do processo de um herbicida micro encapsulado na Ascenza Agro S.A. - a clomazona. Direciona-se também no sentido de verificar a implicação que estes parâmetros podem ter na produção do agroquímico e possui a finalidade de otimização do processo, realizando-se propostas de melhoria.
Inicialmente trataram-se, para vários lotes industriais, os dados das análises de qualidade do produto, verificando-se a variabilidade para cada uma e inferindo sobre o seu controlo, o que serviu de ponto de partida para a realização de testes aos parâmetros que se pensou possuírem implicações nas mesmas. Procuraram-se causas e soluções para o facto de muitas vezes uma das análises de controlo se encontrar fora de especificação, realizaram-se experiências de modo a investigar a polimerização e estudou-se a redução dos tempos processuais.
Deste modo, concluiu-se que os tempos de recirculação e de reação de polimerização podem ser reduzidos em 50% e 25%, respetivamente. Verificou-se que a análise de qualidade mais difícil de controlar foi a granulometria por via húmida visto que possuiu uma percentagem de lotes industriais dentro da especificação de apenas 49%, e que as soluções principais para aumentar esta percentagem envolvem controlar variações de temperatura, efetuar a filtração do produto e manter o aparelho de emulsão em boas condições. Por fim, confirmou-se que à escala laboratorial se produz clomazona com bons resultados de análises de qualidade, sem se efetuar uma rampa de aquecimento tão longa antes da reação e que a redução dos tempos processuais podia permitir a realização de mais um ciclo processual por dia.
Nowadays, microencapsulated products are widely present in the agriculture sector for the protection of crops, in the form of agrochemical products, having the ability to preserve the active substance, releasing it in a controlled manner and increasing the efficiency of the product. This work is intended to evaluate the relevant process parameters of a microencapsulated herbicide at Ascenza Agro S.A. - clomazone. It also aims to verify the implications that these parameters may have on the production of the agrochemical and has the purpose of optimizing the process by proposing improvements. Initially, the data from the product quality analyses for various industrial batches were handled, checking the variability for each and inferring about their control, which served as a starting point for carrying out tests on the parameters that were thought to have implications for them. Causes and solutions were sought for the fact that a final control analysis is often out of specification, experiments were carried out to investigate polymerization and the reduction of process times was studied. Therefore, it was concluded that recirculation and polymerization reaction times can be reduced in 50% and 25%, respectively. It was found that the most difficult quality analysis to control was wet granulometry since it had a percentage of industrial batches within specification of only 49%, and that the main solutions to increase this percentage involve controlling temperature variations, product filtration and maintaining the emulsion equipment in good condition. Finally, it was confirmed that at lab scale, clomazone can be produced with good quality analysis results without requiring such a long heating ramp before the reaction and that reducing of processing times could allow one more process cycle to be carried out per day.
Nowadays, microencapsulated products are widely present in the agriculture sector for the protection of crops, in the form of agrochemical products, having the ability to preserve the active substance, releasing it in a controlled manner and increasing the efficiency of the product. This work is intended to evaluate the relevant process parameters of a microencapsulated herbicide at Ascenza Agro S.A. - clomazone. It also aims to verify the implications that these parameters may have on the production of the agrochemical and has the purpose of optimizing the process by proposing improvements. Initially, the data from the product quality analyses for various industrial batches were handled, checking the variability for each and inferring about their control, which served as a starting point for carrying out tests on the parameters that were thought to have implications for them. Causes and solutions were sought for the fact that a final control analysis is often out of specification, experiments were carried out to investigate polymerization and the reduction of process times was studied. Therefore, it was concluded that recirculation and polymerization reaction times can be reduced in 50% and 25%, respectively. It was found that the most difficult quality analysis to control was wet granulometry since it had a percentage of industrial batches within specification of only 49%, and that the main solutions to increase this percentage involve controlling temperature variations, product filtration and maintaining the emulsion equipment in good condition. Finally, it was confirmed that at lab scale, clomazone can be produced with good quality analysis results without requiring such a long heating ramp before the reaction and that reducing of processing times could allow one more process cycle to be carried out per day.
Descrição
Palavras-chave
Micro encapsulado Clomazona Emulsão Granulometria Polimerização