Rubber antioxidant reuse of raw materials consumed each year reduce 800 million yuan

Nanjing Chemical Industry Co., Ltd. is the byproduct of the rubber antioxidant 6PPD/4010NA production process in the dehydrogenation reuse, accumulated over the past year to reduce consumption of 8 million yuan.

4 - methyl - 2 - pentanol dehydrogenation apparatus is a byproduct in the production process of the anti 6PPD 4 - methyl - 2 - pentanol After dehydrogenation process waste into treasure made raw methanone reuse, the reproduction of a major technology projects. Early last year, the device completed and put into trial operation, 72 hours proficiency test in May. Device technical staff continue to fumble tuning, using vacuum distillation kettle Taiwan shortened to 6-8 hours each kettle recovery rate, but recovery dehydrogenation decline in the quality of raw materials and fluctuations, to appear for trial run the problem device composed of young technicians youth scientific and technological project group grope, rectification. Device system to increase the vacuum trap, transformation of the distillation tower kettle put slag pipeline and dehydrogenation raw regenerative pump feed line; using old equipment to set up a high-boiling components intermediate tank, while transforming the vacuum pump inlet pipe and distillation overhead recovery line. By optimizing the transformation, the vacuum distillation recovery dehydrogenation raw yield of 92.7%, the the distillation effect can be substantial increase. Device technician for subsequent dehydrogenation of continuous operation in the catalyst bed temperature measurement point leak caused frequent stop actively implement optimized transformation. Dehydrogenation reactor discharge process piping towards the transformation temperature measurement points at the same time, the tail hydrogen emptying pipeline transformation of another increase in a gas-liquid separator. Optimize the implementation of the transformation process by adjusting the reactor feed rate, the dehydrogenation catalyst catalyst bed temperature further to find the optimum control conditions, so as to achieve optimal conversion rate.
Over the past year, 4 - methyl-2 - pentanol dehydrogenation unit has far exceeded the annual 6PPD waste water treatment design capacity of 3,000 tons of the Operations Department will explore the potential to further improve byproduct recovery conversion rate, advancing down this drop consumption.