Council of Scientific and Industrial Research

Nagabhatla Viswanadham

Uma Shanker

Nirmalya Ray

Anjan Ray

Devaki Nandan

Rajiv Panwar

Sandeep Kumar Saxena

Turaga Sundara Rama Prasada Rao

Saxena Sandeep Kumar

Ajit Ram Pradhan

Mohan Lal Sharma

Ajit Ramchandra Pradhan

Turuga Sundara Rao

Surendranath Suresh

Hydrocarbon composition plays vital role in fuel quality. For gasoline/motor spirit applications the hydrocarbon should have more octane-possessing molecules from the groups of aromatics, naphthenics and isoparaffins, while n-paraffins are not preferred due to their poor octane. Among the high-octane groups, again aromatics occupy the top but not more than 35 vol % aromatics can be mixed in gasoline for engine applications to avoid harmful emission, But there is no single process that addresses so far the issue of co-producing all the desired hydrocarbon components in a single process. Thus, it is interesting to have a single once-through process working on single catalyst system to produce mixture of all three high-octane molecules namely, aromatics, naphthenics and isoparaffins directly from low-value, low-octane n-paraffin feed. Herein, we report a novel single-step catalytic process for the simultaneous production of aromatics, naphthenics and isoparaffins for gasoline and petrochemical applications.

Single step process for the simultaneous production of aromatics, naphthenics and isoparaffins using transition metal functionalized zeolite based catalyst

In an attempt to conduct an effective conversion of bioethanol into gasoline rich in aromatics and iso-paraffins, a ZSM-5 type zeolite with special features such as nano crystalline size and acidity has been synthesized. The catalyst (NZ) exhibits highest gasoline yield of about 73.8 wt % with aromatics and iso-paraffins as major components. The product measures Research Octane Number (RON) of about 95, which is desirable for the gasoline specifications. Moreover, considerable amounts of the Liquefied Petroleum Gas (LPG) (15 wt %) and light olefins (14 wt %) are also formed as by-products that add value to the process. The nano crystalline ZSM-5 catalyst (NZ) exhibits the stability in activity in terms of bioethanol conversion and aromatics yields for the reaction time period of 40 h.

Catalyst and process for the conversion of bio-ethanol into gasoline

The present invention relates to a novel sulfonated carbon silica (SCS) composite material and a process for the preparation thereof. The synthesized SCS composite material on calcination yields the hierarchical mesoporous silica (MS) and further finds application as catalyst in two industrially important reactions namely phenol butylation and glycerol acetalization.

Sulfonated carbon silica composite material and a process for the preparation thereof

This invention relates to a novel porous crystalline synthetic catalyst having the general formula expressed in the form of oxides: M 2/n o. x Al,O,Y SiO,, Z ZnO wherein, M represents a proton and/or a metallic cation, n is the valence of the said cation, Y/x is a number ranging from 5 to 1000 (SiO,/Al,O,molar ratio), and a process for preparing such catalyst by (a) forming a reaction medium comprising water, a silicon source, an aluminium source, a zinc source and a source of structure directing agent capable of providing organic cations, (b) heating the said reaction mixture to a temperature ranging from 80&deg; C. to 230&deg; C. at autogeneous phase, and (c) heating the solid content obtained at the end of step (b) to a temperature greater than 400&deg; C., so as to eliminate the organic species present due to the use of the structuring agent.

Catalyst comprising oxides of silicon, zinc and aluminium used for the preparation of LPG and high octane aromatics and a process for preparing the same

The present invention relates to a process for production of LPG and high octane aromatic hydrocarbon from non-economically viable petroleum feedstock, which comprises passing the same feedstock through zinc-aluminosilicate molecular sieve (Zn-ZSM-5), in a reactor at a temperature in the range of 300-600.degree. C. pressure 1 to 30 atmosphere liquid hourly space velocity of 1 to 10 hr.sup.-1 and nitrogen to hydrocarbon molar ratio 1 to 4.

Process for the production of LPG and high octane aromatic hydrocarbons

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Uttarakhand, India

Nagabhatla Viswanadham