Process for manufacturing acrylic acid

B.J.V. Verkuijl; Jan van Krieken; F.G. Terrade; Elisabeth Bouwman; Gijsbert Gerritsen; Jos Wilting

Process for manufacturing acrylic acid

B.J.V. Verkuijl (Inventor), Jan van Krieken (Inventor), F.G. Terrade (Inventor), Elisabeth Bouwman (Inventor), Gijsbert Gerritsen (Inventor), Jos Wilting (Inventor)

Inorganic Materials & Catalysis

Research output: Patent › Patent publication

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Abstract

The invention pertains to a process for preparing acrylic acid and/or the ester of acrylic acid and lactic acid from a lactic acid oligomer or polymer, comprising the steps of - bringing a reaction mixture comprising the lactic acid oligomer or polymer to reaction conditions to form acrylic acid and/or the ester of acrylic acid and lactic acid, the reacting mixture comprising a halide source selected from a bromide source and/or a chloride source and optionally an acid selected from the group of acids with a pKa of at most 2.0 and compounds which under reaction conditions decompose under the formation of an acid with a pKa of at most 2.0, with the reaction mixture comprising less than 1 wt. % of water, and - keeping the reaction mixture under reaction conditions for a time sufficient to produce acrylic acid and/or the ester of acrylic acid and lactic acid. It has been found that the use of a bromide source and/or a chloride source in combination with the specified acid results in a process which can be operated to obtain a high yield, and is relatively easy to perform.

Original language	English
Patent number	WO2017108890
IPC	C07C 51/ 09 A I
Priority date	21/12/15
Publication status	Published - 29 Jun 2017

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WO2017108890A1Final published version, 1.02 MB

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title = "Process for manufacturing acrylic acid",

abstract = "The invention pertains to a process for preparing acrylic acid and/or the ester of acrylic acid and lactic acid from a lactic acid oligomer or polymer, comprising the steps of - bringing a reaction mixture comprising the lactic acid oligomer or polymer to reaction conditions to form acrylic acid and/or the ester of acrylic acid and lactic acid, the reacting mixture comprising a halide source selected from a bromide source and/or a chloride source and optionally an acid selected from the group of acids with a pKa of at most 2.0 and compounds which under reaction conditions decompose under the formation of an acid with a pKa of at most 2.0, with the reaction mixture comprising less than 1 wt. % of water, and - keeping the reaction mixture under reaction conditions for a time sufficient to produce acrylic acid and/or the ester of acrylic acid and lactic acid. It has been found that the use of a bromide source and/or a chloride source in combination with the specified acid results in a process which can be operated to obtain a high yield, and is relatively easy to perform.",

author = "B.J.V. Verkuijl and {van Krieken}, Jan and F.G. Terrade and Elisabeth Bouwman and Gijsbert Gerritsen and Jos Wilting",

year = "2017",

month = jun,

day = "29",

language = "English",

type = "Patent",

note = "WO2017108890; C07C 51/ 09 A I",

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TY - PAT

T1 - Process for manufacturing acrylic acid

AU - Verkuijl, B.J.V.

AU - van Krieken, Jan

AU - Terrade, F.G.

AU - Bouwman, Elisabeth

AU - Gerritsen, Gijsbert

AU - Wilting, Jos

PY - 2017/6/29

Y1 - 2017/6/29

N2 - The invention pertains to a process for preparing acrylic acid and/or the ester of acrylic acid and lactic acid from a lactic acid oligomer or polymer, comprising the steps of - bringing a reaction mixture comprising the lactic acid oligomer or polymer to reaction conditions to form acrylic acid and/or the ester of acrylic acid and lactic acid, the reacting mixture comprising a halide source selected from a bromide source and/or a chloride source and optionally an acid selected from the group of acids with a pKa of at most 2.0 and compounds which under reaction conditions decompose under the formation of an acid with a pKa of at most 2.0, with the reaction mixture comprising less than 1 wt. % of water, and - keeping the reaction mixture under reaction conditions for a time sufficient to produce acrylic acid and/or the ester of acrylic acid and lactic acid. It has been found that the use of a bromide source and/or a chloride source in combination with the specified acid results in a process which can be operated to obtain a high yield, and is relatively easy to perform.

AB - The invention pertains to a process for preparing acrylic acid and/or the ester of acrylic acid and lactic acid from a lactic acid oligomer or polymer, comprising the steps of - bringing a reaction mixture comprising the lactic acid oligomer or polymer to reaction conditions to form acrylic acid and/or the ester of acrylic acid and lactic acid, the reacting mixture comprising a halide source selected from a bromide source and/or a chloride source and optionally an acid selected from the group of acids with a pKa of at most 2.0 and compounds which under reaction conditions decompose under the formation of an acid with a pKa of at most 2.0, with the reaction mixture comprising less than 1 wt. % of water, and - keeping the reaction mixture under reaction conditions for a time sufficient to produce acrylic acid and/or the ester of acrylic acid and lactic acid. It has been found that the use of a bromide source and/or a chloride source in combination with the specified acid results in a process which can be operated to obtain a high yield, and is relatively easy to perform.

M3 - Patent publication

M1 - WO2017108890

ER -