NOVELTY - An integrated hydrocarbon conversion process (P1) involves: (a) contacting at least one hydrocarbon reactant with an ionic liquid catalyst in a hydrocarbon conversion zone under hydrocarbon conversion conditions to provide at least one hydrocarbon product comprising at least one halogenated component; and (b) contacting the hydrocarbon product with a hydrodechlorination catalyst in the presence of hydrogen in a hydrodechlorination zone under hydrodechlorination conditions to provide: i) at least one dechlorinated product and ii) an off-gas comprising hydrochloric acid.    USE - In converting integrated hydrocarbon for producing dechlorinated hydrocarbon product such as alkylate gasoline having chloride content less than 50 ppm, and for producing off-gas comprising HCl (claimed), where dechlorinated product provides liquid fuel and lubricating base oil.    ADVANTAGE - The process produces dechlorinated product comprises alkylate gasoline having a chloride content less than 50 ppm; and recovers HCl which is used as a catalyst promoter for the ionic liquid catalyzed hydrocarbon conversion reactions.    DETAILED DESCRIPTION - An integrated hydrocarbon conversion process (P1) involves: (a) contacting at least one hydrocarbon reactant with an ionic liquid catalyst in a hydrocarbon conversion zone under hydrocarbon conversion conditions to provide at least one hydrocarbon product comprising at least one halogenated component; and (b) contacting the hydrocarbon product with a hydrodechlorination catalyst in the presence of hydrogen in a hydrodechlorination zone under hydrodechlorination conditions to provide: i) at least one dechlorinated product and ii) an off-gas comprising hydrochloric acid (HCl), where a first chloride content of the hydrocarbon product is greater than 50 parts per million (ppm) and a second chloride content of the dechlorinated product is less than 50 ppm. INDEPENDENT CLAIMS are included for the following:    (1) a hydrodechlorination and hydrogen chloride recovery process (P2), involving: (a1) contacting at least one hydrocarbon product with a hydrodechlorination catalyst in the presence of hydrogen under hydrodechlorination conditions to provide: i) an off-gas comprising an HCl and ii) a dechlorinated product; (b1) separating the dechlorinated product from the off-gas; (c1) contacting the off-gas with an adsorbent under HCl adsorbing conditions such that the HCl is adsorbed by the adsorbent; and (d1) recovering the HCl from the adsorbent; and    (2) a hydrocarbon conversion and hydrodechlorination process (P3), involving: contacting at least one hydrocarbon reactant with an ionic liquid catalyst in a hydrocarbon conversion zone under hydrocarbon conversion conditions to provide used ionic liquid combined with a conjunct polymer; regenerating at least a portion of the used ionic liquid in a catalyst regeneration zone to provide reactivated ionic liquid catalyst and a free conjunct polymer; separating the tree conjunct polymer from the ionic liquid catalyst; and contacting the free conjunct polymer with a hydrodechlorination catalyst in the presence of hydrogen in a hydrodechlorination zone under hydrodechlorination conditions to provide a dechlorinated product.