TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The ionic liquid catalyst comprises a chloroaluminate ionic liquid. The adsorbent comprises a molecular sieve selected 3A, 4A, 5A, 13X, 13Y, USY, ZSM-5, ZSM-22, ZSM-23, ZSM-35, ZSM-48, MCM-22, MCM-35, MCM-58, SAPO-5, SAPO-11, SAPO-35, or VPX-5.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Process: In the process (P1), the first chloride content of the hydrocarbon product is greater than 100 ppm, and a second, chloride content of the dechlorinated product is less than 10 ppm. The process (P1) further involves: separating the dechlorinated product from the off-gas; contacting the off-gas with an adsorbent under HCl adsorbing conditions such that the HCl is adsorbed by the adsorbent to provide an HCl-free off-gas; and recovering the HCl from the adsorbent. The process (P1) further involves: prior to step (b), feeding the hydrocarbon product to a distillation unit to provide at least one distilled hydrocarbon product, where the hydrocarbon product contacted with the hydrodechlorination catalyst in step (b) comprises the distilled hydrocarbon product. The process (P1) further involves: after step (b), feeding the dechlorinated product to a distillation unit. The step (b) involves contacting the hydrocarbon product with the hydrodechlorination catalyst at 300-750 degrees F, a pressure of 100-5000 psig, a liquid hourly-space velocity (LHSV) feed, rate of 0.1-50, and a hydrogen supply in the range of 50-8000 standard cubic feet per barrel (SCFB) of the hydrocarbon product. The process (P1) further involves: feeding the HCl to the hydrocarbon conversion zone. The process (P1) is performed under anhydrous conditions. In the process (P2), the hydrodechlorination conditions involves a reaction temperature of 300-750 degrees F, a reaction pressure of 100-5000 psig, a liquid hourly space velocity (LHSV) feed rate of 0.1-50, and a hydrogen supply in the range from 50-8000 standard cubic feet per barrel (SCFB) of the at least one hydrocarbon product. The step (b1) involves separating the dechlorinated product, as a liquid, at 50-600 degrees F, and the step (d1) involves contacting the adsorbent with a recovery carrier gas, where the HCl is desorbed from the adsorbent. The hydrocarbon product is obtained by contacting at least one hydrocarbon reactant with an ionic liquid catalyst in a hydrocarbon conversion zone under hydrocarbon conversion conditions. The dechlorinated product comprises middle distillate fuel having a chloride content less than 10 ppm; diesel fuel having a chloride content less than 10 ppm; and base oil having a chloride content less than 10 ppm. The process (P3) involves: contacting the conjunct polymer with the hydrodechlorination catalyst to further provide an off-gas comprising HCl; contacting the off-gas with an adsorbent in an HCl adsorption zone where the HCl is adsorbed by the adsorbent to provide an HCl-free off-gas; and recovering the HCl from the adsorbent. The HCl-free off-gas comprises H2, and the process further involves: recycling the HCl-free off-gas to the hydrodechlorination zone. Preferred Components: The hydrocarbon reactant comprises 4-10C isoparaffin and 2-10C olefin. The hydrocarbon product is selected from alkylate gasoline, diesel fuel, jet fuel, and/or base oil. The dechlorinated product comprises alkylate gasoline having a chloride content less than 50 ppm. The hydrodechlorination catalyst comprises an element selected from elements of Groups 6, 8, 9, 10, and/or 11, present as metals, oxides, or sulfides. The adsorbent is selected from a molecular sieve, a refractory oxide, and/or activated carbon. EXAMPLE - No suitable example given.