visbreaking

visbreaking

[′vis‚brāk·iŋ]
(chemical engineering)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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They started comprehensive testing of the CDU / VDU-6 unit with the vacuum distillation unit of the visbreaking residue was at the TATNEFT's TANECO Oil Refining Complex and received the first batch of straight-run gasoline.
Further investigation indicate that the catalysis aquathermolysis could not only enhance the visbreaking of heavy oil, but also improve its pyrolysis and remove some heteroatoms (S, O and N), and finally make the flow properties better and the quality upgraded, which indicates that it has great potential for further applications.
Built by Snamprogetti of Italy and the local Tekfen, this includes units for vacuum distillation, visbreaking, and sulphur recovery.
It describes the origin, occurrence, and properties of naphthenic acids in crude oil; the mechanism of acid corrosion, including types of corrosion, corrosion by acidic species, sulfidic corrosion, and physical effects; corrosion by high acid crude oil and process effects, corrosion of refinery equipment, and the interaction of acids with refinery equipment; effects in refining (process effects, desalting, distillation, visbreaking, coking, catalytic cracking, hydroprocesses, and mitigation); and removing acid constituents from crude oil through physical and chemical methods, as well as corrosion monitoring and prevention.
During this spring's shutdown, the visbreaking unit was cleaned up to return to the original condition and throughput capacity.
Thermal cracking includes gas oil, visbreaking, fluid coking, delayed coking, and other thermal cracking processes (e.g., flexicoking).
However, it is a polymorphism character of non-smooth morphologies due to living creature diversity and complexity of nature surroundings, which have divers functions (such as hydrophobicity, anti-adhesion, visbreaking, wear-resistant, noise elimination etc.).
Applications and case studies are included, in areas such as fouling mitigation, coking, visbreaking, and hydroconversion.
[5] observed that pyrolysis of crude oil in porous media went through three overlapping stages: distillation, visbreaking and coking.
It also has low peroxide interaction during "visbreaking."
They are polymerized directly in the reactor and still have the narrowest molecular weight distribution even without the need for post-reactor chemical visbreaking. These peroxide-free resins offer a very clean product eliminating spinning smoke.