Saudi Basic Industries Corporation

Fahad A Al-Sherehy

Shahid Azam

Abdullah Al-Nutaifi

Alaa Eldin M Adris

Mustafa A Soliman

Tarique Hakeem

Shickh Kareemuddin

Munawwar Saudagar

Mian Rahat Saeed

Mohammad Akhtar Zahoor

Olagoke Olabisi

Mohammed M Abdillahi

Shahid M Azam

Abdullah A Al-Nutaifi

An apparatus for performing continuous flow chemical reactions such as oxidation, oxidative dehydrogenation and partial oxidation processes involving a reactor design characterized by controlled/optimized addition of a reactant with the objective of: (i) avoiding the explosion regime of the reactant mixture (e.g., hydrocarbon/oxidant mixture); (ii) maximizing the selectivity of the reaction to the desired product; (iii) limiting the reactor temperature gradient and therefore the threat of reaction runaway; and (iv) controlling the operating temperature of the reaction zone so that desirable temperature range is maintained over the entire zone.

Continuous flow reaction systems with controlled addition of reactants

Apparatus for the controlled optimized addition of reactants in continuous flow reaction systems

A catalyst and a process are provided for oligomerizing ethylene. A heterogeneous catalyst system comprises: (1) a chelating ligand, preferably 2-diphenyl phosphino benzoic acid (DPPBA); (2) a nickel precursor, preferably nickel chloride hexahydrate (NiCl,.6H,O); (3) a catalyst activator, preferably sodium tetraphenylborate (NaBPh,); and (4) silica. A 1:1:1 molar ratio of Ni:DPPBA:BPh,catalyst components are fixed on a silica support using low-temperature fixation. The catalyst components are dispersed in a diluent, preferably ethanol, and silica is added. The ethanol is evaporated using freeze-drying equipment to form a silica-supported catalyst system. The silica-supported catalyst is slurried in ethanol in a reactor, and ethylene is added. The reactor pressure and temperature are maintained at about 725 psig and 100&deg; C., respectively, for about two hours. The oligomer product formed has a narrower weight percent distribution, typically having about 96 weight percent C,'s to C,'s, compared to product formed using a homogeneous catalyst system.

Catalyst and process for ethylene oligomerization

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Riyadh, Saudi Arabia

Fahad A Al-Sherehy