公开(公告)号：US20220356138A1

公开(公告)日：2022-11-10

申请号：US17623449

申请日：2020-06-19

Applicant: SABIC GLOBAL TECHNOLOGIES B.V.

Inventor： Jaiprakash Brijlal SAINANI ,  Shirish Shrikant ABHYANKAR

IPC: C07C41/14 ,  C07C41/40

Abstract: The present invention relates to a process for the di-O-alkylation of a 1,3-diol according to Formula I (I), said process comprising reacting said 1,3-diol with dioxane, an aliphatic or aromatic hydrocarbon solvent, an alkali metal hydroxide, and dimethyl sulphate, in order to obtain a 1,3-diether according to Formula II (II), wherein R1 and R2 are each independently a hydrogen atom or a hydrocarbyl group selected from alkyl, alkenyl, aryl, aralkyl, or alkylaryl groups, and one or more combinations thereof. The process according to the invention is an improved process for preparing 1,3-diether, such as 9,9-bis(methoxymethyl)fluorene, in a high yield and/or having a high purity. 9,9-bis(methoxymethyl)fluorene is a compound that is used as an electron donor for Ziegler-Natta catalysts.

公开(公告)号：US20230373891A1

公开(公告)日：2023-11-23

申请号：US18031506

申请日：2020-10-13

Applicant: SABIC GLOBAL TECHNOLOGIES B.V.

Inventor： Jaiprakash Brijlal SAINANI ,  Kiran Arunkumar PUTHAMANE ,  Shirish Shrikant ABHYANKAR ,  Omkar GADGIL

IPC: C07C41/16 ,  C07C41/34 ,  C07C41/42

CPC classification number: C07C41/16 ,  C07C41/34 ,  C07C41/42

Abstract: The present invention relates to a process for the preparation of 2-isopentyl-2-isopropyl-1,3-dimethoxypropane, said process comprising the steps of: i) contacting iso-valderaldehyde with an aqueous solution of a hydroxide base selected from the group consisting of sodium hydroxide (NaOH), potassium hydroxide (KOH) or a combination thereof, said solution having an amount of said hydroxide base of at least 20% w/v, and (m)ethanol; to form (2Z)-2-isopropyl-5-methyl-2-hexenal; step ii) contacting (2Z)-2-iso-propyl-5-methyl-2-hexenal with a reducing system to form 2-isopropyl-5-methylhexanal; step iii) contacting 2-isopropyl-5-methylhexanal with formaldehyde and an inorganic base to form 2-isopentyl-2-isopropylpropane-1,3-diol; and step iv) contacting 2- isopentyl-2-isopropylpropane-1,3-diol with a methylation agent and a base to form 2-isopentyl-2-isopropyl-1,3-dimethoxypropane.