Process for the acylation of an alpha, omega-alkanediol

A process for acylating an α,ω-alkanediol, wherein the process comprises the steps of:

• conducting an acylation reaction of an α,ω-alkanediol with an acylation agent to form reaction components comprising α,ω-C3-10alkanediol, α,ω-C3-10alkanediol monoacylate and α,ω-C3-10alkanediol diacylate, and
• recycling the reaction components comprising the α,ω-C3-10alkanediol, α,ω-C3-10alkanediol monoacylate and α,ω-C3-10alkanediol diacylate by re-feeding the reaction components back into the acylation reaction,
• with the proviso that in the acylation reaction there is practiced adding 0.5 to 1.5 mole of water per mole recycled acylate groups, wherein
• a molar ratio of a molar sum of the acylating agent, α,ω-C3-10 alkanediol monoacylate and 2 times the α,ω-C3-10alkanediol diacylate to the molar sum of the α,ω-C3-10alkanediol, α,ω-C3-10 alkanediol monoacylate and α,ω-C3-10alkanediol diacylate is in a range from 0.5 to 1.1 mol per mol of α,ω-C3-10alkanediol.