摘要:
Compositions and methods are disclosed for reducing combustion chamber deposits (CCD) and/or intake valve deposits (IVD) in spark ignition internal combustion engines. A succinic acid derivative (SAD) of this invention or a mixture with at least one additional component of this invention is added to a liquid hydrocarbon or liquid hydrocarbon-oxygenate gasoline each in an amount of about 0.0005–0.5 wt % of the gasoline. Preferably the gasoline is unleaded. The preferred additional components include polyethers (PE), polyolefin butyrolactam derivatives (BLD), butyrolactam alkoxylates (BLA), tridecanol alkoxylate derivatives (TAD) and polyisobutylene amine (PIBA).
摘要:
Compositions and methods are disclosed for reducing combustion chamber deposits (CCD) and/or intake valve deposits (IVD) in spark ignition internal combustion engines. A butyrolactam alkoxylate (BLA) and/or a butyrolactam derivative (BLD) of this invention or a mixture with at least one additional compound of this invention is added to a liquid hydrocarbon or liquid hydrocarbon-oxygenate gasoline each in an amount of about 0.0005-0.5 wt % of the gasoline. Preferably the gasoline is unleaded. The preferred additional components include polyethers (PE) and polyisobutylene amine (PIBA).
摘要:
A process for substantially decreasing fouling in a refinery unit. The process comprises preheating a feed to said refinery unit reactor zone and there-after introducing the feed into said refinery unit reactor zone for reaction. The feed is preheated for a time and at a temperature sufficient to cause an effective amount of any polymers and/or oligomers contained in feed to decompose or unzip to substantially reduce fouling in the refinery unit.
摘要:
Combustion chamber deposits and intake valve deposits in a spark ignition internal combustion engine which uses a liquid hydrocarbon or liquid hydrocarbon-oxygenate fuel, by using an unleaded fuel to which has been added an additive selected from the group consisting of low boiling alkyl pyridines, 4-vinylpyridine, DMF, N-formylpiperidine, sulfolane, polyolefin, polyether or polyether amine derivatives of DMF, amidene, or N-substituted-2 pyrrolidones, polyolefin in an amount of at least about 1,000 wppm and mixtures thereof. Functionalized polymer detergents can be used alone and added to the fuels in amounts in of about at least 3,000 wppm.
摘要:
A process for decreasing fouling in a refinery unit comprising preheating a hydrocarbon feed to a refinery unit reactor zone and thereafter introducing the feed into the refinery unit reactor zone for reaction. The feed contains polymers and oligomers, and is preheated for a time and at a temperature sufficient such that when the feed is introduced into the refinery unit reaction zone for reaction, the combination of the pre-heating and heating attributable to the reaction zone causes at least 85% of the polymers and oligomers contained in the feed to unzip and wherein no more than about 5 wt % coke is formed in said feed during the preheating step.
摘要:
Promoter amines are used to enhance CO2 uptake by sterically hindered or tertiary amines. The promoter amines can be cyclic amines, including aromatic cyclic amines or bridged cyclic amines. The combination of a promoter amine plus a sterically hindered or tertiary amines allows for improved uptake kinetics while reducing or minimizing the amount of formation of carbamate salts. The promoted sterically hindered or tertiary amines can be used as part of a CO2 capture and release system that involves a phase transition from a solution of amine-CO2 products to a slurry of amine-CO2 precipitate solids.
摘要:
A liquid aminoether acid gas absorbent which is subject to freezing in a cold climatic zone though which the aminoether is to be shipped is rendered freeze-resistant by mixing the aminoether with water prior to transport through the cold climatic zone; the aminoether/water mixture typically contains 10 to 40 weight percent water, based on the weight of the aminoether. The aminoether/water mixture can also be stored in the cold climatic zone without being externally maintained at a temperature above the inherent freezing point of the aminoether.
摘要:
Ionic liquids are capable of acting as solvents for amine CO2 absorbent compounds in CO2 separation processes and when so used enhance the sorption of the CO2 by the amine. A cyclic sorption process for separating CO2 from a gas stream, such as flue gas or natural gas, brings the gas stream into contact with an absorbent solution of an amine CO2 sorbent in an ionic liquid solvent followed by desorbing the CO2 to regenerate the amine.
摘要:
Aminoethers are used as corrosion inhibitors in boiler systems in which a working fluid comprising water with an aminoether corrosion inhibitor is circulated from a heater to a utilization site at which the working fluid gives up energy and decreases in temperature. A preferred class of aminoethers are the alkoxytriethyleneglycol-tert-alkylamines such as methoxy triethyleneglycol-tert-butylamine