METHODS OF DEOXYGENATING BIO-BASED MATERIAL AND PRODUCTION OF BIO-BASED TEREPHTALIC ACID AND OLEFIN MONOMERS Russian patent published in 2018 - IPC C10G3/00 C07C1/207 C07C4/06 C07C11/02 C07C15/08 C07C51/265 C10G45/02 C10G49/04 C10G65/12 

FIELD: chemistry.

SUBSTANCE: invention relates to a process for deoxygenating tall oil pitch, where tall oil pitch, which contains a certain proportion of fatty and resin acids and/or derivatives thereof, is heated to a temperature sufficient to convert it into a liquid; said liquid is fed into catalyst bed (7) to contact it with hydrogen and one or more catalysts (2, 3) in said catalyst bed, wherein said catalysts include NiMo deoxygenation catalyst (2); incoming materials are catalytically deoxygenated with hydrogen; and the gaseous effluent from the bed is cooled to produce liquid product (10) which contains aliphatic and aromatic hydrocarbons and which is substantially completely deoxygenated. Invention also relates to a process for the production of bio-based terephthalic acid in which tall oil pitch containing a certain proportion of fatty and resin acids and/or derivatives thereof is heated to a temperature sufficient to convert it into a liquid; said liquid is fed into catalyst bed (7) to contact it with hydrogen and one or more catalysts (2, 3) in said catalyst bed, wherein said catalysts include NiMo deoxygenation catalyst (2); incoming materials are catalytically deoxygenated with hydrogen; the gaseous effluent from the bed is cooled to provide liquid intermediate (10, 13) which contains aliphatic and aromatic hydrocarbons and which are substantially completely deoxygenated; an aromatic hydrocarbon that can be converted to terephthalic acid is separated from said intermediate (13); and the separated hydrocarbon is subjected to an oxygenation reaction and a possible rearrangement, so that terephthalic acid is obtained as the final product. Invention also relates to a process for the preparation of olefin monomers for the preparation of a polymer in which tall oil pitch containing a certain portion of fatty and resin acids and/or derivatives thereof is heated to a temperature sufficient to convert it to a liquid; said liquid is fed into catalyst bed (7) to contact it with hydrogen and one or more catalysts (2, 3) in said catalyst bed, wherein said catalysts include NiMo deoxygenation catalyst (2); incoming materials are catalytically deoxygenated with hydrogen; the gaseous effluent from the bed is cooled to provide liquid intermediate (10, 13) which contains aliphatic and aromatic hydrocarbons and which are substantially completely deoxygenated; a fraction enriched with aliphatic hydrocarbons (14) is separated from said intermediate (13); and said fraction (14) is subjected to steam cracking to produce a product that contains polymerisable olefins.

EFFECT: methods for deoxygenating a bio-based material and for producing bio-based terephthalic acid and olefin monomers are provided.

14 cl, 2 tbl, 1 ex, 1 dwg