A process for producing ammonia and a derivative of ammonia from a natural gas feed comprising conversion of natural gas into a make-up synthesis gas; synthesis of ammonia; use of said ammonia to produce said derivative of ammonia, wherein a portion of the natural gas feed is used to fuel a gas turbine; power produced by said gas turbine is transferred to at least one power user of the process, such as a compressor; heat is recovered from exhaust gas of said gas turbine, and at least part of said heat is recovered as low-grade heat available at a temperature not greater than 200 C., to provide process heating to at least one thermal user of the process, such as CO2 removal unit or absorption chiller; a corresponding plant and method of modernization are also disclosed.

A manufacturing system for producing polyolefin includes a polymerization reactor, a flash chamber, and a purge column. In certain embodiments, the purge column may receive a solids stream directly from the flash chamber. Further, the purge column may function as a feed tank for an extruder within an extrusion/loadout system. According to certain embodiments, the manufacturing system may be configured to consume less than 445 kilowatt-hours of energy per metric ton of polyolefin produced based on consumption of electricity, steam, and fuel gas.

A system and method for discharging a transfer slurry from a first polymerization reactor through a transfer line to a second polymerization reactor, the transfer slurry including at least diluent and a first polyethylene. A product slurry is discharged from the second polymerization reactor, the product slurry including at least diluent, the first polyethylene, and a second polyethylene. The velocity, pressure drop, or pressure loss due to friction in the transfer line is determined, and a process variable adjusted in response to the velocity, pressure drop, or pressure loss not satisfying a specified value.

The invent on relates to a device for producing starting materials, combustible substances and fuels from organic substances. Said device comprises a reactor (10) that comprises a feeding device (11) for the organic substances, a discharge device (12) for the reaction products, and a device (13) for supplying reaction energy for the transformation of organic substances into the reaction products. The invention is characterized in that the reactor (10) comprises a device (14) for forming a circulating flow inside the reactor.

A process for recovery of ethylene from a polymerization product stream of a polyethylene production system, comprising separating a light gas stream from the polymerization product stream, wherein the light gas stream comprises ethane and unreacted ethylene, contacting the light gas stream with an absorption solvent system, wherein the contacting the light gas stream with the absorption solvent system occurs at a temperature in a range of from about 40 F. to about 110 F., wherein at least a portion of the unreacted ethylene from the light gas stream is absorbed by the absorption solvent system, and recovering unreacted ethylene from the absorption solvent system to yield recovered ethylene.

A system and method for discharging a transfer slurry from a first polymerization reactor through a transfer line to a second polymerization reactor, the transfer slurry including at least diluent and a first polyethylene. A product slurry is discharged from the second polymerization reactor, the product slurry including at least diluent, the first polyethylene, and a second polyethylene. The velocity, pressure drop, or pressure loss due to friction in the transfer line is determined, and a process variable adjusted in response to the velocity, pressure drop, or pressure loss not satisfying a specified value.

A system and method for discharging a transfer slurry from a first polymerization reactor through a transfer line to a second polymerization reactor, the transfer slurry including at least diluent and a first polyethylene. A product slurry is discharged from the second polymerization reactor, the product slurry including at least diluent, the first polyethylene, and a second polyethylene. The velocity, pressure drop, or pressure loss due to friction in the transfer line is determined, and a process variable adjusted in response to the velocity, pressure drop, or pressure loss not satisfying a specified value.

A polyolefin production system including: a first reactor configured to produce a first discharge slurry having a first polyolefin; a second reactor configured to produce a second discharge slurry having a second polyolefin; and a post-reactor treatment zone having at least a separation vessel configured to receive the second discharge slurry or both the first discharge slurry and the second discharge slurry.

A method for generation of 1,2-dichloroethane from ethylene and chlorine and for water desalination includes performing the respective processes in plant parts coupled thermally with one another, and allowing heat from the reaction of ethylene with chlorine to be utilized as an energy source for the water desalination. This heat can be utilized extensively by virtue of the coupled water desalination. A corresponding plant is configured for performance of such methods and corresponding methods include using heat from a method for generation of 1,2-dichloroethane from ethylene and chlorine for heating of water to be treated in a water desalination process.

Embodiments of a dual reactor solution polymerization method comprising: introducing a first feed comprising ethylene monomer, optionally hydrogen, optionally C.sub.3-C.sub.12 alpha-olefin comonomer, and hydrocarbon solvent to a first polymerization reactor to produce via solution polymerization at a temperature from 100 to 225 C. a first reactor product comprising ethylene-based polymer; and introducing the first reactor product and a two-phase second feed comprising ethylene monomer, hydrocarbon solvent, optionally hydrogen, and optionally C.sub.3-C.sub.12 alpha-olefin comonomer to a second polymerization reactor to produce via solution polymerization ethylene-based polymer, wherein a ratio by weight of the summation of the hydrocarbon solvent plus comonomer to ethylene monomer in the two-phase second feed is from 0.1 to 2.2.