TH90407A - Processes for industrial production of dialkyl carbons and diols. - Google Patents

Abstract

DC60 One purpose of this invention is to provide a specific process that can Alkyl carbons and diol are produced on an industrial scale at least 2 t / h for di Alkyl carbonate, and not less than 1.3 t / h for diol, respectively, with high specificity and stable high productivity over a long period of time through the erythis distillation system. The active use of cyclic carbonate and aliphatic monohydric alcohols as precursors, continuous infusion of reagents. The plant enters a continuous multi-stage distillation tower where the catalyst is, and the reaction and distillation go hand in hand in that distillation tower. Although many proposals have been proposed referring to the processes for Produced dialkyl carbons and diol through reactive distillation methods, these are used in the Work at a small laboratory level And short work, and it is not disclosed what specific processes or equipment can achieve industrial-scale mass production. This invention has been established with a dedicated continuous multi-stage distillation tower with Unique structures, and production processes using this continuous multi-stage distillation tower, where dialky carbonate and diol can be manufactured on an industrial scale of at least 2 tons / Hrs for dialky carbonate, and not less than 1.3 t / h for diol, respectively with a high specificity not less than 95%, which would be good to use no less than 97 %, Which is better than that used at least 99%, stable for a long period of not less than 1000 hrs, which is good at not less than 3000 hrs, which is better than that used not less than 5000 One of the objectives of this invention is to establish a specific process that can make Alkyl carbons and diol are produced on an industrial scale at least 2 t / h for di Alkyl carbonate, and not less than 1.3 t / h for diol, respectively, with high specificity and stable high productivity over a long period of time through the erythis distillation system. Active use of cyclic carbonate and aliphatic monohydric alcohols as precursors Continuous infusion of reagents The plant enters a continuous multistage distillation chamber where the catalyst is, and the reaction and distillation go hand in hand in that distillation spear. Although many proposals have been proposed referring to the processes for Produced dialkyl carbons and diol through reactive distillation methods, these are used in the Work at a small laboratory level And it is not disclosed what specific processes or equipment can achieve industrial-scale mass production. Following this invention, there is a local continuous multi-stage distillation tower. There is a unique structure, and production process using a continuous multi-step distillation tower. Where dialky carbons and diols can be manufactured at an industrial scale of at least 2 t / h for dialky carbonates, and not less than 1.3 t. For diol, respectively, with a high specificity of not less than 95%, it is good at not less than 97%, it is better to use no less than 99% for a long period More than 1000 cm, which is better at not less than 3000 hrs, which is better than less than 5000 hrs.

Claims (1)

1.Industrial processes for the manufacture of dialkyl carbonates and diols that are Which dialkyl carbonate And diols are produced continuously through the reactive distillation system of Using cyclic carbonate And aliphatic monohydric alcohols as reactants, consisting of a process of: the continuous infusion of that substrate into a continuous multi-stage distillation pack with a catalyst. Homogeneous reactions, simultaneous reaction and distillation in the distillation tower, and continuous extraction of low boiling point mixtures tagged: