US 10,329,216 B2 · Catalytic composition and process using it for the alkylation of aromatic hydrocarbons with alcohols, or mixtures of alcohols and olefins

Abstract

The invention relates to a new catalytic composition for the alkylation of aromatic compounds with alcohols, or mixtures of alcohols and corresponding olefins, wherein said composition comprises a zeolite of the MTW type and is characterized in that it contains one or more alkaline metals in a total quantity which is less than or equal to 0.02% by weight. The use of said catalyst in the alkylation of aromatic compounds with alcohols, in particular benzene with isopropanol or ethanol, allows the formation, as by-product, of the aldehyde or ketone corresponding to the alcohol used, to be minimized: the formation of reaction by-products of said aldehydes or ketones having a boiling point very close to that of polyalkylation products, is therefore significantly reduced. This provides a considerable advantage in the subsequent transalkylation step for the recovery of said polyalkylates by transformation into the corresponding monoalkylates.

Claims17

Dependent claims

A process for the alkylation of an aromatic hydrocarbon with an aliphatic alcohol having 1-8 carbon atoms, or with a mixture of the aliphatic alcohol having 1-8 carbon atoms and a corresponding olefin, which comprises effecting said alkylation in the presence of a catalytic composition comprising:

a zeolite of the MTW type,
5 to 40 ppm of sodium ions, and
5 to 80 ppm of potassium ions,
wherein:
the SiO2/Al2O3 molar ratio in said zeolite is 20-95, and
the total amount of alkaline metals, including sodium ions and potassium ions, in the catalytic composition is lower than or equal to 0.015% by weight with respect to the total weight of the catalytic composition.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

15/026,924Filed 14 Oct 2014

Priority

IT MI2013A170415 Oct 2013

Published

US 2016/0297728 A113 Oct 2016

Granted

25 Jun 2019

Term ends

Not estimatedThe source records don’t support an estimate.

Classification23 codes

C07C 2/864
The non-hydrocarbon contains only oxygen as hetero-atoms: the non-hydrocarbon is an alcohol
B01J 29/7034
Of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65: mTW-type, e.g. ZSM-12, NU-13, TPZ-12 or Theta-3
B01J 35/36
Mechanical properties: mechanical strength
B01J 35/50
Catalysts, in general, characterised by their form or physical properties: characterised by their shape or configuration

Catalytic composition and process using it for the alkylation of aromatic hydrocarbons with alcohols, or mixtures of alcohols and olefins

Life of this patent

Catalytic composition and process using it for the alkylation of aromatic hydrocarbons with alcohols, or mixtures of alcohols and olefins

Life of this patent

Abstract

Claims17