MUMBAI, India, Nov. 14 -- Intellectual Property India has published a patent application (202547098432 A) filed by Bertrams Chemieanlagen Ag, Muttenz, Switzerland, on Oct. 13, for 'caustic solution evaporation plant.'

Inventor(s) include Hostettler, Max.

The application for the patent was published on Nov. 14, under issue no. 46/2025.

According to the abstract released by the Intellectual Property India: "The invention relates to a caustic solution evaporation plant comprising a caustic solution feeding line, a first stage evaporator (EV-1101) receiving low concentrated caustic solution and operating at a reduced pressure of less than or equal to 0.15 bar, a second stage evaporator (EV-1201) receiving enriched caustic solution from the first evaporator (EV-1101) and operating at a reduced pressure of less than or equal to 0.5 bar, a third stage evaporator (EV-1301) receiving further enriched caustic solution from the second stage evaporator (EV-1201) and operating at a pressure of greater than or equal to 1.1 bar, a fourth stage evaporator (EV-1401) receiving further enriched caustic solution from the third evaporator (EV-1301) and operating under a pressure greater than 4.0 bar characterized in that the first stage evaporator (EV-1101) being heated by the vapours generated from the second stage evaporator (EV-1201), the second stage evaporator (EV-1201) being heated by the vapours generated from the third stage evaporator (EV- 1301), the third stage evaporator (EV-1301) being heated by the vapours generated by the fourth stage evaporator (EV-1401), and the fourth stage evaporator (EV-1401) being heated by thermal oil, the thermal oil being circulated by a pump (P-6301) through an electric heater (H-6101) in a closed loop, a vapour condensate tank (T-7101) collecting vapour condensate from the first (EV-1101) second (EV-1201), and third stage evaporator (EV-1301), a water cooled surface condenser (C-7101) condensing vapour generated in the first stage evaporator (EV-1101), a pump (P7101) draining the vapour condensate tank (T-7101), and a product caustic solution exit line."

The patent application was internationally filed on Apr. 15, 2024, under International application No.PCT/EP2024/060178.

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