BOPI 08 BR/2023 REPERTOIRE NUMERIQUE 20 2-BRIMSTONE ENERGY INC., 557 59th St., OAKLAND, California 94609 (US) (74) SPOOR & FISHER Inc. NGWAFOR & PARTNERS SARL, The House of Gideon, Golf/Bastos Quarter, Opposite The American Embassy, Entrance-Saint John Paul II Boulevard, B.P. 8211, YAOUNDE (CM). (57) Aspects of the invention include a method of producing a cement material comprising step of: first reacting a calcium-bearing starting material with a first acid to produce an aqueous first calcium salt; second reacting the aqueous first calcium salt with a sccond acid to produce a solid second calcium salt; wherein the second acid is different from the first acid and the second calcium salt is different from the first calcium salt; and thermally treating the sccond calcium salt to produce a first cement material. Preferably, but not necessarily, during the second reacting step, reaction between the first calcium salt and the second acid regenerates the first acid. Fig. 1 Consulter le mémoire ________________________________________ (11) 21093 (51) F01K 21/04 (2018.01) (21) 1202200074 - PCT/IB2020/058210 (22) 03/09/2020 (30) IT n° 102019000015776 du 06/09/2019; IT n° 102019000015770 du 06/09/2019 (54) New combined thermodynamic cycle with high energy recovery. (72) OLIVOTTI, Sergio (IT) (73) I.V.A.R. S.P.A., Via IV Novembre, 181 25080 PREVALLE (BS) (IT) (74) SPOOR & FISHER Inc. NGWAFOR & PARTNERS SARL, The House of Gideon, Golf/Bastos Quarter, Opposite The American Embassy, Entrance-Saint John Paul II Boulevard, B.P. 8211, YAOUNDE (CM). (57) The absolute novelty of the new combined SEOL cycle is represented by the recovery vapor Generator (GVR) which completely substitutes the Regenerator, of the prior art, being capable of recovering the energy differential (QR) between the temperature at the end of expansion and the temperature at nearly complete condensation of the thermal fluid and then, by using this great energy differential, it is capable of producing water vapor, entirely reusable in the preheating of the mixture, considerably contributing to the increase of the overall energy yield of the cycle and to the increase of the unit power of the heat engine. With the use of the new combined SEOL cycle, it is possible to obtain the following main advantages: A_ increase of the unit power of the heat engine, due to the increase of enthalpy of the mixture which is introduced in the Expander (ES); B_ considerable increase of the overall thermal yield, following the energy recovery (QR) that takes place in the recovery vapor Generator (GVR); C_ possibility of lubricating the cylinders and/or the sliding chambers of the pistons of the heat engine, w ith decrease of the mechanical friction and of the wear and consequent increase of the overall yield of the engine itself; D_ possibility of using multiple heat sources (OH), capable of heating to
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