Exxonmobil Chemical Patents Inc.

Kellogg Brown + Root LLC

Exxonmobil Engineering & Technology Company

Alok Srivastava

James N McCoy

Michael A Radzicki

Quo-Chen Yeh

Kristine E Hamilton

David Sellinger

Paul F Keusenkothen

Richard Charles Stell

Robert Choi

Subramanian Annamalai

David Beattie

James M Frye

Rian Reyneke

James Earl Graham

Thomas W Pavia

James R Arnold

Roshni Jindal

Matthew B Yarrison

Rodney S Smith, Jr

David C Dutschmann

Larry J Shulik

Robert David Strack

Rodney S Smith

David Bleckinger

Bryan Daniel McVicker

Chee Keong Then

Chee-Keong Then

James P Chapman

David C Beattie

The present disclosure relates to processes, apparatuses, and systems for the removal of sulfur compounds from a heavy hydrocarbon feed as part of steam cracking processes to produce light olefins. In at least one embodiment, the process includes introducing a hydrocarbon feed having a first sulfur content to a steam cracker to produce a steam cracker effluent having a second sulfur content less than the first sulfur content. The process includes introducing the steam cracker effluent to a fractionation system to produce a light hydrocarbon product stream having a third sulfur content less than the second sulfur content.

Hydrocarbon pyrolysis of feeds containing sulfur

A system for hydrogenation Cand Cacetylenes contained within a hydrocarbon stream generated in a stream cracker unit where a debutanizer is placed upstream of a depropanizer for more economical processing of the hydrocarbon stream to produce lighter hydrocarbons, where the system requires only one stripper tower downstream of hydrogenation to remove residual hydrogen.

Hydrogenation of acetylenes in a hydrocarbon stream

A system and process for generating, on-site, a sustained C+Caromatic rich solvent stream for tar solvation within the olefin plant employing a two-fuel oil tower system receiving a hydrocarbon feed from a quench water separator drum, where the two-fuel oil tower system is configured to make a sufficient solvent stream containing C+Caromatic rich hydrocarbons that is recycled and mixed with quench water going to the quench water separator drum to assist in removing tar molecules out of the quench water.

On-site solvent generation and makeup for tar solvation in an olefin plant

A first stream containing 1,3-butadiene, Cacetylenes, and optionally Chydrocarbons, is mixed with a portion of the liquid recycle stream from a Cacetylene hydrogenation reactor containing hydrogenated Cacetylenes and a molecular hydrogen-containing stream, the resulting mixed stream is then fed to a Cacetylene hydrogenation reactor to selectively hydrogenate the Cacetylenes in the crude butadiene stream without appreciable 1,3-butadiene conversion.

Upgrading streams comprising Cand Chydrocarbons

A system and a process for dimerizing cyclopentadiene (CPD) including producing a C+Crich bottoms stream and a Crich side draw from a debutanizer, where the Crich side draw and at least a portion of the C+Crich bottoms stream are directed to a dimerizer where the CPD is thermally dimerized to dicyclopentadiene (DCPD). DCPD is more stable than CPD and thus safer to handle.

Dimerization of cyclopentadiene from side stream from debutanizer

The invention generally relates to processes for separating steam cracker products by fractional distillation, and to systems and apparatus useful in such processes. More specifically, the invention relates to decreasing the amount of fractionator fouling that can result from increasing the amount of hydrocarbon molecules in the steam cracker feed having four or fewer carbon atoms.

Steam cracker product fractionation

The invention relates to methods and equipment for converting Colefin to, e.g., one or more of di-Colefin, oligomers and polymers of Colefin, branched C-aldehydes, C-carboxylic acids, and Coxygenates. The invention encompasses producing methyl tert-butyl ether and diisobutylene, and converting methyl tert-butyl ether to isobutylene.

Hydrocarbon conversion process

The invention is directed to a process wherein a feedstock or stream comprising steam cracker tar is passed to a vacuum pipestill. A deasphalted cut of tar is obtained as an overhead (or sidestream) and a heavy tar asphaltenic product is obtained as bottoms. In preferred embodiments, at least a portion of the bottoms product is sent to a partial oxidation unit (POX) wherein syn gas may be obtained as a product, and/or at least a portion of the bottoms product is used to produce a light product stream in a coker unit, such as coker naphtha and/or or coker gas oil. In another preferred embodiment at least a portion of the overheads product is added to refinery fuel oil pools and in yet another preferred embodiment at least a portion of the overheads product is mixed with locally combusted materials to lower soot make. Two or more of the aforementioned preferred embodiments may be combined.

Upgrading of tar using POX/coker

A process is described for producing deasphalted steam cracker tar comprising feeding steam cracker tar to a vacuum pipestill (VPS) including a flash zone separated from a zone comprising trays by at least one annular entrainment ring and obtaining as an overheads a deasphalted tar product and as a bottoms an asphaltenic heavy tar product. Also according to the invention, there is a system for the upgrading of tar comprising said VPS with at least one annular entrainment ring.

VPS tar separation

The invention relates to the use of steam cracked tar with the bottoms product of a flash drum integrated with a pyrolysis furnace. In embodiments, the steam cracked tar is added to fuel oil.

Use of steam cracked tar

Growing community of inventors

Houston, TX, United States of America

Alok Srivastava