In-situ bromine regeneration processes for the production of bromobutyl elastomers

A process, comprising:

• introducing an aqueous solution with a first organic solvent to form an emulsion, wherein the aqueous solution comprises an oxidizing agent and a surfactant;
• introducing a cement with the emulsion to form a first mixture in a reactor, wherein the cement comprises a butyl rubber elastomer and a second organic solvent;
• introducing a halogen source with the first mixture contained in the reactor to form a second mixture, wherein forming the second mixture further comprises conducting a halogenation reaction comprising:
• reacting the halogen source with the butyl rubber elastomer to form an initial halogenated butyl rubber elastomer and a hydrogen halide,
• reacting the hydrogen halide with the oxidizing agent to form a free halide, and
• continuing the halogenation reaction to produce additional halobutyl rubber elastomer;
• introducing a neutralizing agent with the second mixture to form a third mixture;
• and
• isolating the initial halobutyl rubber elastomer and/or the additional halobutyl rubber elastomer from the third mixture.

A process comprising:

• introducing an aqueous solution with a first hydrocarbon solvent to form an emulsion, wherein the aqueous solution comprises an oxidizing agent and a surfactant;
• introducing a cement to the emulsion to form a first mixture within a reactor, wherein the cement comprises a butyl rubber elastomer and a second hydrocarbon solvent that is the same as or different than the first hydrocarbon solvent;
• introducing HBr into the reactor containing the first mixture to form a second mixture comprising a halobutyl rubber elastomer;
• introducing a neutralizing agent with the second mixture to form a third mixture;
• and
• isolating the halobutyl rubber elastomer from the third mixture.

A process, comprising:

• introducing an aqueous solution with a first organic solvent to form an emulsion, wherein the aqueous solution comprises an oxidizing agent and a surfactant;
• introducing a cement with the emulsion to form a first mixture in a reactor, wherein the cement comprises a butyl rubber elastomer and a second organic solvent;
• introducing a halogen source with the first mixture contained in the reactor to form a second mixture such the molar ratio of oxidizing agent to halogen is about 0.2:1 to about 0.8:1, wherein forming the second mixture further comprises conducting a halogenation reaction comprising:
• reacting the halogen source with the butyl rubber elastomer to form an initial halogenated butyl rubber elastomer and a hydrogen halide,
• reacting the hydrogen halide with the oxidizing agent to form a free halide, and continuing the halogenation reaction to produce additional halobutyl rubber elastomer;
• introducing a neutralizing agent with the second mixture to form a third mixture;
• and
• isolating the initial halobutyl rubber elastomer and/or the additional halobutyl rubber elastomer from the third mixture to form a waste mixture, wherein the waste mixture comprises about 2,000 mg/L to about 2,650 mg/L of dissolved solids.