Processes to control fouling and improve compositions

C - Chemistry – Metallurgy – 08 – K

Patent

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Details

C08K 5/00 (2006.01) C08F 6/02 (2006.01) C08L 23/08 (2006.01) C08K 3/22 (2006.01) C08K 5/098 (2006.01) C08L 53/00 (2006.01)

Patent

CA 2727437

Improved reaction processes comprise reacting a mixture to form a product comprising a metal alkyl, metal oxide, or mixture thereof and then passing said product to a post-reactor heat exchanger. The improvement comprises one or more of the following: (1) reacting said metal alkyl compound with an acid to produce a soluble metal ester; or (2) adding an ionic surfactant; or (3) adding a mixture comprising an antioxidant to the product under conditions sufficient to avoid formation of significant amounts of insoluble metal or metal compounds derived from said metal alkyl compound; or (4) purging said post-reactor heat exchanger with an inert gas under conditions to remove metal oxide from the post-reactor heat exchanger.

Selon l'invention, des procédés de réaction améliorés consistent à faire réagir un mélange pour former un produit contenant un alkyle métallique, un oxyde métallique ou un mélange correspondant et, puis, à acheminer ledit produit jusqu'à un échangeur thermique de post-réaction. L'amélioration comprend une ou plusieurs étapes suivantes qui consistent à (1) faire réagir un composé d'alkyle métallique avec un acide pour produire un ester métallique soluble ou à (2) ajouter un tensioactif ionique, ou à (3) ajouter au produit un mélange contenant un antioxydant dans des conditions permettant d'éviter la formation de quantités importantes de métal insoluble ou de composés métalliques provenant du composé d'alkyle métallique, ou à (4) purger l'échangeur thermique de post-réaction avec un gaz inerte dans certaines conditions afin d'éliminer l'oxyde métallique provenant de l'échangeur thermique de post-réaction.

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