Abstract

The present invention relates to a method for purifying alkyl aromatic compounds that is based on a system for percolating the fraction of the alkylate in which the chromophor precursors are concentrated using a selected clay placed in a fixed-bed reactor.

IPC Classes  ?

• C07C 2/66 - Catalytic processes
• C07C 15/107 - Monocyclic hydrocarbons having a saturated side-chain containing at least six carbon atoms, e.g. detergent alkylates
• C07C 7/05 - Purification, separation or stabilisation of hydrocarbonsUse of additives by distillation with the aid of auxiliary compounds
• C07C 7/13 - Purification, separation or stabilisation of hydrocarbonsUse of additives by adsorption, i.e. purification or separation of hydrocarbons with the aid of solids, e.g. with ion-exchangers by molecular-sieve technique
• B01D 15/00 - Separating processes involving the treatment of liquids with solid sorbentsApparatus therefor
• C11D 3/18 - Hydrocarbons

Abstract

The present invention relates to a method for performing catalytic transalkylation between long-chain dialkyl benzenes and benzene in order to obtain monoalkyl benzenes. As dialkyl benzene source, this method employs the by-products of a method for alkylation of benzene with linear C9-C16 monoolefins.

IPC Classes  ?

• C07C 15/02 - Monocyclic hydrocarbons
• C07C 15/107 - Monocyclic hydrocarbons having a saturated side-chain containing at least six carbon atoms, e.g. detergent alkylates
• C07C 2/66 - Catalytic processes
• C07C 6/12 - Preparation of hydrocarbons from hydrocarbons containing a different number of carbon atoms by redistribution reactions by conversion at a saturated carbon-to-carbon bond of exclusively hydrocarbons containing a six-membered aromatic ring
• C07C 5/22 - Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms by isomerisation
• B01J 29/04 - Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites, pillared clays

Abstract

Method for preparing a highly soluble straight alkyl benzene sulphonate with an adjustable 2-phenyl isomer content and an extremely low sulphonation colour, using a catalytic system based on highly stable solid catalysts having high selectivity for straight monoalkyl compounds.

IPC Classes  ?

• C07C 303/06 - Preparation of esters or amides of sulfuric acidsPreparation of sulfonic acids or of their esters, halides, anhydrides or amides of sulfonic acids or halides thereof by substitution of hydrogen atoms by sulfo or halosulfonyl groups by reaction with sulfuric acid or sulfur trioxide
• C07C 309/31 - Sulfonic acids having sulfo groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton of non-condensed six-membered aromatic rings of six-membered aromatic rings substituted by alkyl groups by alkyl groups containing at least three carbon atoms
• C07C 15/107 - Monocyclic hydrocarbons having a saturated side-chain containing at least six carbon atoms, e.g. detergent alkylates
• B01J 29/08 - Crystalline aluminosilicate zeolitesIsomorphous compounds thereof of the faujasite type, e.g. type X or Y
• B01J 29/18 - Crystalline aluminosilicate zeolitesIsomorphous compounds thereof of the mordenite type
• C11D 11/04 - Special methods for preparing compositions containing mixtures of detergents by chemical means, e.g. sulfonating in the presence of other compounding ingredients followed by neutralising

Abstract

The present invention relates to a method for preparing a highly soluble linear alkyl benzene sulphonate (LAS). Specifically, the method includes adding a hydrotropic composition before or after the sulphonation of the linear alkyl benzene and/or the neutralisation of the alkyl benzene sulphonic acid. The invention further relates to a hydrotropic composition, a highly soluble linear alkyl benzene sulphonate, the use of the hydrotropic composition to render said linear alkyl benzene sulphonate highly soluble, and a cleaning composition including said linear alkyl benzene sulphonate.

IPC Classes  ?

• C07C 303/06 - Preparation of esters or amides of sulfuric acidsPreparation of sulfonic acids or of their esters, halides, anhydrides or amides of sulfonic acids or halides thereof by substitution of hydrogen atoms by sulfo or halosulfonyl groups by reaction with sulfuric acid or sulfur trioxide
• C07C 309/31 - Sulfonic acids having sulfo groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton of non-condensed six-membered aromatic rings of six-membered aromatic rings substituted by alkyl groups by alkyl groups containing at least three carbon atoms
• C11D 11/04 - Special methods for preparing compositions containing mixtures of detergents by chemical means, e.g. sulfonating in the presence of other compounding ingredients followed by neutralising

Goods & Services

(1) Ink solvents, inks and aromatic solvents.