5 results about "Prenol" patented technology

The present invention relates to a method for the preparation of 3-methyl-3-butene-1-ol (isoprenol), comprising the steps of preparing isobutylene (also: isobutene, 2-methylpropene) by contacting 3-methylbutan-1-ol (isoamyl alcohol) to a catalyst comprising at least one catalytically active metal and reacting at least one formaldehyde source and the isobutylene obtained in step a-i) to obtain isoprenol. Furthermore, the present invention refers to processes for the preparation of 3-methyl-2-butene-1-ol (prenol), of 3-methyl-3-butenal (isoprenal), of 3-methyl-2-butenal (prenal), and of 3,7-dimethy l-octa-2, 6-dienal (citral) and further downstream products comprising the use of isoprenol of the present invention and the resulting products and product streams.

The present invention relates to a method for preparing 3-methyl-2-butenal (prenal), 3-methyl-2-buten-1-ol (prenol), diprenyl acetate of prenal, and 3,7-dimethyl-octa-2,6-dienal (citral), wherein the aldehyde content in one or more reaction flows is maintained below a threshold. Furthermore, the present invention relates to available product flows of prenal, prenol, diprenyl acetate of prenal, and citral.

DEPCT6916 / 12 / 2568 This invention relates to a process for preparing 3-methyl-2-butenal (prenal) for... Prepare 3-methyl-2-butane-1-ol(prenol), for the preparation of diprenyl acetate of prenol, including for... Preparation of 3,7-dimethyl-octa-2,6-dienal(citral) where the amount of aldehyde in one reactant stream The current, or more precisely, is kept below the triggering value. Furthermore, this invention also involves... The product stream that can be obtained from prenol, prenol diprenyl acetate of prenol including citral;

The present application relates to the technical field of organic synthesis, in particular to a preparation method of isopentenol, and further to a method for preparing 3-methyl-2-buten-1-ol from 2-methyl-3-buten-2-ol as raw material. In the method, the hydroxyl group in methylbutenol is replaced by chlorination to generate 3-chloroisopentenol, and then isomerization is performed to obtain a mixture containing 1-chloroisopentenol, and the mixture containing 1-chloroisopentenol is hydrolyzed to obtain isopentenol. In the method, methylbutenol is converted into isopentenol through a simple process, the overall yield is more than 95%, and no expensive catalyst is needed; the whole process is simple to operate and easy to industrialize.

The present invention relates to a process for recovering prenyl alcohol substantially free of formaldehyde from a crude prenyl alcohol stream containing prenyl alcohol, water and formaldehyde, which process comprises subjecting said crude prenyl alcohol stream or a prenyl alcohol containing fraction thereof to distillation in a low-boiler separation column operating at a pressure of 2.5 bar or more to obtain a distillate stream containing water-containing formaldehyde and a bottoms stream containing prenyl alcohol. The process of the present invention allows obtaining prenyl alcohol substantially free of formaldehyde. The present invention also provides an apparatus for recovering prenyl alcohol substantially free of formaldehyde from a crude prenyl alcohol stream containing prenyl alcohol, water and formaldehyde, which apparatus comprises a first low-boiler separation column, a second low-boiler separation column and a work-up column.