Purac Biochem Bv

Johannes Adrianus Kamp

Jan Van Krieken

Gerrit Gobius Du Sart

Kees Van Der Voort Maarschalk

Siebe Cornelis De Vos

Lambertus Hendricus Roozen

Maarten Hendrik Wieringa

A method for quantification of the amount of meso-lactide in a composition containing at least one other lactide stereoisomer with respect to the total amount of lactide stereoisomers in the composition. The quantification is based on measurements performed on absorptions in the Infra-Red region of the electromagnetic spectrum. Small amounts of meso-lactide in a lactide composition could be measured online in an easy and reproducible manner. Preferably near-IR has been used in this quantification method. The method can be applied with great advance in a lactide production device.

Quantification method of meso-lactide in a lactide-containing composition

A method for storage and/or transport of solid lactide particles in a container, includes the steps of a) inserting the lactide particles into the container, b) storing and/or transporting the lactide particles for a period of time in the container, and c) removing the lactide particles from the container. The lactide particles are contained in a big-bag having at least one flexible layer of a plastic material. Storage and/or transport of lactide particles in such big-bag has the advantage that big-bags allow mechanical handling in case of chunks formed by the lactide particles.

Method for storage and/or transport of lactide particles

The invention relates to a method for the removal of the cyclic diester of a 2-hydroxy alkanoic acid from a vapor containing said diester, wherein the vapor is contacted with an aqueous solution so that the diester dissolves in said solution. According to the invention, the method is characterized in that the solution is an alkaline solution, preferably having a pH above 10. The problem of the formation of slurries of the diester in the aqueous solutions can be prevented by the present invention. The method can be applied with great advantage in the production or conversion of lactide.

Growing community of inventors

Gorinchem, Netherlands

Johannes Adrianus Kamp