Assignee
CHANGZHOU RUIHUA CHEMICAL ENGINEERING & TECH CO LTD
CN·4 granted patents·1 pending application·0 citations·filing 2022–2024
Top patents by PatentIndex Score
5 records- 0169US2025320322A1Preparation method for high impact polystyrene and high impact polystyreneCHANGZHOU RUIHUA CHEMICAL ENGINEERING & TECH CO LTD·Filed 2023·Application pending·0 cites
- 0261US12372231B2Device and method for producing high-pressure or super high-pressure steam as byproduct from maleic anhydride producing deviceCHANGZHOU RUIHUA CHEMICAL ENGINEERING TECH CO LTD·Filed 2024·Granted Jul 29, 2025·0 cites·7 claims
- 0354US12121835B2Method for refining styrene by using combined falling film reboilers and heat pump technology to provide heat source of separation columnCHANGZHOU RUIHUA CHEMICAL ENGINEERING TECH CO LTD·Filed 2022·Granted Oct 22, 2024·0 cites·9 claims
- 0453US12551820B2Low-pressure drop ethylbenzene evaporator and energy-saving process for ethylbenzene vaporization in styrene dehydrogenation reaction systemCHANGZHOU RUIHUA CHEMICAL ENGINEERING TECH CO LTD·Filed 2022·Granted Feb 17, 2026·0 cites·3 claims
- 0545US12312321B2Method for direct hydrogenation of maleic anhydride to produce 1,4-butanediol and co-produce succinic anhydrideCHANGZHOU RUIHUA CHEMICAL ENGINEERING TECH CO LTD·Filed 2022·Granted May 27, 2025·0 cites·6 claims
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