Hydrobromination method

A process for synthesizing a product of formula R1-CHBr—CH2—R2 by hydrobromination by reacting:

• a) a reagent of formula (I) R1-CH═CH—R2 in which R1 and R2, which may be identical or different, are chosen from H or an alkyl radical comprising from 1 to 30 carbon atoms, which is saturated or unsaturated, linear or branched, and functionalized or non-functionalized,
• b) with a molar excess of HBr relative to the reagent of formula (I),
• in the presence of a radical initiator,
• and optionally in the presence of at least one solvent,
• said process comprising a step A of mixing at least the reagent I and the HBr, each of the latter arriving respectively in the form of a liquid stream in a mixing device dA,
• wherein a turbulent flow system prevails, so as to reach, at the end of this step A, a degree of conversion included in the range of from 10% to 100%, and
• wherein the process further comprises a step B of spontaneous continuation of the reaction in a device dB in which a transient or laminar flow system prevails, so as to reach, at the end of this step, a degree of conversion of greater than 90%,
• wherein the residence times in the devices dA and dB are such that the degree of conversion at the end of step A is included in the range of from 10% to 90%, while the degree of conversion at the end of step B is included in the range of from 90% to 100%.