摘要:
A multi-stage hydrotreating process obtains ultra-low sulfur diesel boiling range hydrocarbon having less than 10 ppm sulfur with elimination of external hot high pressure separator and avoids the formation of recombinant mercaptans by removing excess hydrogen sulfide formed during hydroprocessing reaction. The process includes mixing a diesel boiling range hydrocarbon feedstock with hydrogen and sending to the first predominantly liquid phase hydroprocessing reaction stage. Effluent from the first hydroprocessing reaction stage is sent to first separator zone of open and empty space in the upper part of the second hydroprocessing reaction stage to flash off the dissolved reaction products hydrogen sulfide and ammonia. Liquid part of the effluent of first hydroprocessing reaction stage is passed to the second predominantly liquid phase hydroprocessing reaction stage. The process is repeated until the liquid product sulfur level of less than 10 ppm is attained and the liquid product is sent to further processing.
摘要:
The present invention relates to a process for production of oligomer products from olefinic C4 feed stocks comprising isobutene, butenes, butanes, butadienes and mixture thereof. Particularly, the present invention relates to a process for the preparation of oligomers using olefinic C4 feed stock in presence of tertiary butyl alcohol (TBA) and iso propyl alcohol (IPA).
摘要:
The present invention provides a liquid organomagnesium precursor having formula {Mg(OR′)X}.a{MgX2}.b{Mg(OR′)2}.c{R′OH}, wherein R′ is selected from a hydrocarbon group, X is selected from a halide group, and a:b:c is in range of 0.1-99.8:0.1-99.8:0.1-99.8, and a process for preparing the same. The said process comprises contacting a magnesium source with an organohalide and alcohol in a solvent to form the liquid organomagnesium precursor. The present invention also provides a catalyst system using the organomagnesium precursor and its use thereof for polymerization of olefins. An illustrative example of the claimed process to make the organomagnesium precursor is: At 25° C., magnesium (powder or turnings) is added to organohalide, followed by alcohol in toluene. After heating to 90° C. and keeping there for 6 h the solution became viscous.
摘要:
The present invention describes a process for controlling particle size of a catalyst composition. The process comprising the steps of contacting an internal donor with an organomagnesium precursor solution to form an intermediate solution and treating the intermediate solution with a transition metal compound to form a catalyst composition, wherein particle size of the catalyst composition is controlled by controlling a contact time of the internal donor with the precursor solution during formation of the intermediate solution.
摘要:
The present invention provides an adsorbent for removal of con-carbon and contaminant metals in feed, said adsorbent composition consisting of clay in the range of 30-70 wt. % and silica in the range of 70-30 wt. %, wherein the adsorbent has a pore volume in the range of 0.25-0.45 cc/gm; a pore size in the range of 20 to 2000 Å and a bi-modal pore size distribution characteristics, with a maximum of about 32% of the adsorbent having a pore size in the range of 20-200 Å and a minimum of about 68% of the adsorbent having a pore size in the range of 200-2000 Å. The present invention also provides a process for preparing the said adsorbent.
摘要:
The present invention provides a catalyst product comprising of (a) porous acidic clay material and (b) binder and matrix to shape the catalyst to either microspheres, pellet, tablet, extrudate and ring and suitable for enhancing the crack-ability of heavy feed material derived from atmospheric and vacuum distillation bottoms; FCC bottoms, coker bottoms and hydrocracker bottoms. The invention particularly relates to a catalyst cum heat supply product suitable for thermal coking process either in a batch mode or continuous coking process.
摘要:
The present invention provides a solid organomagnesium precursor having formula {Mg(OR′)X}.a{MgX2}.b{Mg(OR′)2}.c{R′OH}, wherein R′ is selected from a hydrocarbon group, X is selected from a halide group, and a:b:c is in range of 0.01-0.5:0.01-0.5:0.01-5 and process for preparing the same, said process comprising contacting a magnesium source with a solvating agent, an organohalide and an alcohol to obtain the solid organomagnesium precursor. The present invention also provides a process for preparing a catalyst system using the organomagnesium precursor and its use thereof for polymerization of olefins.
摘要:
The present invention provides a process and a system for coking and simultaneous upgrading of a heavy hydrocarbon feedstock. More particularly the present invention relates to a process of cracking heavy hydrocarbon feedstock employing high heat carrier, incorporated with weak acid sites for improving the liquid yield and reducing coke yield. The feedstock is vaporized and brought in contact with a heat carrier material to produce a product stream and separating the product stream from the particulate heat carrier, regeneration of the particulate heat carrier to the extent of 10-30% and collecting a gaseous and liquid product from the product stream.
摘要:
A catalyst composition for use as precursor for Ziegler-Natta catalyst system, said catalyst composition comprising a combination of magnesium moiety, titanium moiety and an internal donor containing at least one 1,2-phenylenedioate compound of structure (A). Also, the present invention provides a process for preparing the aforesaid catalyst composition. Further, the present invention provides a Ziegler-Natta catalyst system incorporating the aforesaid catalyst composition and a method for polymerizing and/or copolymerizing olefins using the Ziegler-Natta catalyst system.
摘要:
The present invention relates to a catalyst precursor composition comprising a first component having active sites, said first component being at least one of the surface modified clay and/or pore modified zeolite; and a second component being metal species comprising of at least one metal selected from Group VI B and at least one metal selected from VIII B and the second component is in intimate contact with the active sites of the first component. The present invention also provides a process for preparing the catalyst precursor composition. The present invention also relates to a catalyst composition and process of preparation thereof by using the catalyst precursor. More particularly, the present invention provides a catalyst composition suitable for converting hydrocarbon feeds to diesel range product.