US 4,304,947 AGranted

Catalytic alkylation of hydrocarbons

AssigneePhillips Petroleum Company

InventorThomas Hutson, Jr.

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Abstract

An integrated process for the simultaneous alkylation of at least one isoparaffinic hydrocarbon with at least one C.sub.4 olefinic hydrocarbon and at least one isoparaffinic hydrocarbon with at least one olefinic hydrocarbon selected from the group consisting of C.sub.3, C.sub.5 and higher olefinic hydrocarbons and mixtures thereof, comprising: contacting a first alkylatable hydrocarbon comprising an isoparaffinic hydrocarbon with a first alkylating agent comprising at least one olefinic hydrocarbon selected from the group consisting of C.sub.3, C.sub.5 and higher olefinic hydrocarbons and mixtures thereof in the presence of an acid-type catalyst to alkylate said first alkylatable hydrocarbon; separating the effluent from the first alkylation reaction into a first alkylate phase and a first catalyst phase containing catalyst-soluble oil; recycling at least a portion of said first catalyst phase to said first alkylation reaction; contacting a second alkylatable hydrocarbon comprising an isoparaffinic hydrocarbon with a second alkylating agent comprising at least one C.sub.4 olefinic hydrocarbon in the presence of an acid-type catalyst to alkylate said second alkylatable hydrocarbon; separating the effluent from the second alkylation reaction into a second alkylate phase and a second catalyst phase containing catalyst-soluble oil; recycling at least a portion of said second catalyst phase to said second alkylation reaction; and adding at least a portion of one of said first catalyst phase, said second catalyst phase or both of said first and said second catalyst phases to the other of said first catalyst phase and said second catalyst phase.

Claims43

Dependent claims

An integrated process for the simultaneous alkylation of at least one isoparaffinic hydrocarbon with at least one olefinic hydrocarbon selected from the group consisting of C.sub.3 olefinic hydrocarbons, C.sub.5 and higher olefinic hydrocarbons and mixtures thereof and at least one isoparaffinic hydrocarbon with an olefinic hydrocarbon mixture containing significant amounts of at least one C.sub.4 monoolefinic hydrocarbon comprising:

contacting a first alkylatable hydrocarbon comprising at least one isoparaffinic hydrocarbon with an alkylating agent comprising a major portion of at least one olefinic hydrocarbon selected from the group consisting of C.sub.3 olefinic hydrocarbons, C.sub.5 olefinic hydrocarbons, higher olefinic hydrocarbons and mixtures thereof in the presence of an acid-type catalyst at a catalyst to hydrocarbon volume ratio and an isoparaffin to olefin mol ratio, a temperature and pressure and for a contact time sufficient to alkylate said first alkylatable hydrocarbon in a first alkylation reaction;
separating the reaction effluent from said first alkylation reaction into a first alkylate phase and a first acid phase containing acid-soluble oil in a first separation step;
recycling at least a portion of said first acid phase to said first alkylation reaction;
contacting a second alkylatable hydrocarbon comprising at least one isoparaffinic hydrocarbon with a second alkylating agent comprising a significant portion of at least one C.sub.4 monoolefinic hydrocarbon in the presence of an acid-type catalyst at a catalyst to hydrocarbon volume ratio and an isoparaffin to C.sub.4 monoolefin mol ratio, a temperature and pressure and for a contact time sufficient to alkylate said second alkylatable hydrocarbon in a separate, second alkylation reaction;
separating the reaction effluent from said second alkylation reaction into a second alkylate phase and a second acid phase containing acid-soluble oil in a separate, second separation step;
recycling at least a portion of said second acid phase to said second alkylation reaction;
and
maintaining a predetermined amount of acid-soluble oil in each of said recycled first and said second acid phases, respectively, by at least periodically passing at least a portion of one of said first acid phase to said second acid phase, and said second acid phase to said first acid phase or both said first acid phase and said second acid phase to the other of said second acid phase and said first acid phase, respectively.

5 more elements

A method for starting up an integrated process for the simultaneous alkylation of a first alkylatable hydrocarbon comprising at least one isoparaffinic hydrocarbon with a first alkylating agent comprising a major portion of an olefinic hydrocarbon selected from the group consisting of C.sub.3 olefinic hydrocarbons, C.sub.5 and higher olefinic hydrocarbons and mixtures thereof in a first reaction zone and a second alkylatable hydrocarbon comprising at least one isoparaffinic hydrocarbon with a second alkylating agent comprising an olefinic hydrocarbon mixture containing significant amounts of at least one C.sub.4 monoolefinic hydrocarbon in a separate, second reaction zone comprising:

circulating a first stream of an acid-type alkylation catalyst through each of said first reaction zone, a first reaction effluent separation zone and back to said first reaction zone;
circulating a second stream of an acid-type alkylation catalyst through said second reaction zone, a separate, second reaction effluent separation zone and back to said second reaction zone;
contacting an acid-soluble oil precursor selected from the group consisting of C.sub.3 olefinic hydrocarbons, C.sub.5 and higher olefinic hydrocarbons, a diolefinic hydrocarbon and mixtures thereof with an acid-type catalyst selected from the group consisting of said first catalyst stream, said second catalyst stream, fresh acid-type catalyst and mixtures thereof;
and
adding the acid-soluble oil reaction product of the previous step to each of said first catalyst stream and said second catalyst stream until a predetermined amount of acid-soluble oil is present in each of said first and said second streams of catalyst.

2 more elements

Dependencies are inferred from the claim text.