Reliance Industries Limited

Uday Meghashyam Ratnaparkhi

Pavankumar Aduri

Parasu Veera Uppara

Mangesh Raghunath Sakhalkar

Suresh Shantilal Jain

Parasuveera Uppara

Viswanath Kotra

Vivek Prabhakar Raje

Vibhuti Dukhande

Romal Ramkrushna Chafle

Gordhan Das Goyal

Suresh Iyengar

Prathmesh Pradeep Salvi

Vibhuti Dhukande

Rahul Mahadeo Dhawade

Rahul Kumbhar

Pavan Kumar Aduri

Aduri Pavankumar

The present disclosure relates to an ionic liquid composition and a process for its preparation. The process of the present disclosure is simple, single pot and efficient process for preparing the ionic liquid composition which is effective in a Friedel Craft reaction like, alkylation reaction, trans-alkylation, and acylation. The present disclosure envisages an ionic liquid composition comprising at least one metal hydroxide; at least one metal halide; and at least one solvent. Also envisaged is a process for preparing an ionic liquid composition. The process comprises mixing in a reaction vessel, at least one metal hydroxide and at least one metal halide in the presence of at least one solvent under a nitrogen atmosphere and continuous stirring followed by cooling under continuous stirring to obtain the ionic liquid composition.

Metal hydroxide based ionic liquid composition

The present disclosure relates to a process for preparing linear alkyl benzne (LAB). The process comprises alkylation of benzene with an alkylating agent in the presence of an ionic liquid to obtain a first product mixture comprising a first organic phase and a first aqueous phase comprising first partially spent ionic liquid. The first organic phase is deacidified and fractionally distilled to obtain a fraction comprising LAB and a fraction comprising HAB. The fraction comprising HAB is transalkylated with benzene in the presence of the ionic liquid to obtain a second product mixture comprising a second organic phase comprising LAB and a second aqueous phase comprising second partially spent ionic liquid. The partially spent ionic liquids are regenerated, and reused in the steps of alkylation or transalkylation for at least 6 cycles.

Process for preparing linear alkyl benzene

The present disclosure provides a composition for preparing aryl carboxylic acid; said composition comprising: at least one ionic liquid, at least one catalyst, at least one non-oxidizable polar solvent, and at least one oxidizable multi-alkylated arylene compound with no two successive ring positions bearing alkyl group. The present disclosure also provides a process for preparing aryl carboxylic acid.

Ionic liquid composition

In the present disclosure, a process for separating aryl carboxylic acids from a mixture comprising a plurality of aryl carboxylic acids is provided, wherein the process comprising the steps of heating a first mixture that comprises at least two aryl carboxylic acids wherein each of said aryl carboxylic acids having a pre-determined liquefaction temperature and a pre-determined precipitation temperature, with at least one ionic compound, at a pre-determined temperature to obtain a liquefied composition; and cooling the liquefied composition under controlled temperature conditions to fractionally crystallize and precipitate an aryl carboxylic acid. The precipitated aryl carboxylic acid is isolated and the obtained mother liquor is subjected to iterated cooling steps until each of the remaining aryl carboxylic acids precipitates one by one. The mother liquor remains in liquefied form.

Process for separating aryl carboxylic acids

A process for preparing alditol Acetals via a dehydrocondensation reaction is disclosed. The reaction is carried out by adding an aldehyde and an aldiol using a metal salt based ionic liquid as an acid catalyst. The ionic liquid used in the process is prepared by dissolving a hydrogen donor and a compound providing counter ion in a solvent.

Process for preparing alditol acetals

A method for preparing an ionic compound by mixing at least one compound of formula CA-zHO (1) with at least one hydrogen donor and heating the mixture obtained is provided. The said ionic compound remains in a physical state selected from the group consisting of liquid and semisolid at a temperature below 150&#xb0; C., preferably below 125&#xb0; C.

Ionic fluids

A process for the preparation of 1,3:2,4-bis(4-methylbenzylidene)sorbitol (MDBS) and 1,3:2,4-bis(3,4-dimethylbenzylidene)sorbitol (DMDBS) via a dehydrocondensation reaction is disclosed. The reaction is carried out between an aldehyde and an alditol in a mole ratio of 2:1 wherein ionic fluid is used as the acidic catalyst and/or reaction medium. The ionic fluid used in accordance with the present invention is quaternary ammonium salt based ionic liquid.

Process for preparation of acetals

This invention is directed to a process for preparation of acetal derivatives, 1,3:2,4-bis(3,4-dimethylbenzylidene)sorbitol (DMDBS) and 1,3:2,4-bis(4-methylbenzylidene)sorbitol (MDBS) by carrying out a dehydrocondensation reaction between an aldehyde and an alditol using an aqueous ionic fluid as the acid catalyst.

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Navi Mumbai, India

Uday Meghashyam Ratnaparkhi