50 results about "Bromine number" patented technology

One exemplary embodiment can be a hydrotreating process. The hydrotreating process can include providing a first feed stream having a coker naphtha with a bromine number of about 10-about 120, combining the first feed stream with a second feed stream having a straight run naphtha with a bromine number of less than about 10 to create a combined feed, providing the combined feed to a hydrotreating reactor having at least one catalyst bed, and separating a quench stream from the second feed stream and providing the quench stream after the at least one catalyst bed.

The invention discloses a process for producing solvent oil by removing aromatic hydrocarbon from raffinate oil, which comprises the following steps of: (1) rectifying raffinate oil, and removing sulfolane, water and colloid substances from the raffinate oil; (2) completely hydrogenating the raffinate oil obtained in the step (1) under the action of a benzene hydrogenation catalyst; and (3) removing excessive hydrogen from the product of the step (2) by separating, rectifying and collecting the product at the top of a rectifying tower to obtain solvent oil No.6 or normal hexane. In the method, all the raw materials are cleaned, hydrogenated and separated, reformed circulating hydrogen can be used, and the distillation range of the product is controllable. The content of aromatic hydrocarbon in the obtained product is trace, and the bromine number is lower than 100 mgBr/100g.

A hydrogenated product of a copolymer of cyclopentadiene and/or dicyclopentadiene and a vinyl-substituted aromatic compound. The copolymer has a softening point of from 60 to 130 DEG C., a vinyl-substituted aromatic compound content of from 30 to 90% by weight, a bromine number of from 30 to 90 g/100 g, a number average molecular weight of from 400 to 1,000, and a weight average molecular weight/number average molecular weight (Mw/Mn) ratio of 2.5 or less. The hydrogenated product has a softening point of 60 to 130 DEG C., a vinyl-substituted aromatic compound content of 0 to 35% by weight, a bromine number of 0 to 300 g/100 g, a number average molecular weight of 400 to 1,000 and a weight average molecular weight/number average molecular weight ratio of 2.5 or less. The hydrogenated product is useful as a substrate in the production of a tackifier and an adhesive.

A liquid random copolymer of ethylene and alpha-olefin prepared by using specific metallocene catalyst and ionic compound and a method for preparing the same are disclosed. The liquid random copolymer has high viscosity index and shear stability so that it is useful as synthetic lubricants. The liquid random copolymer of ethylene and alpha-olefin (1) comprises 60 to 40 mol % of ethylene units and 40 to 60 mol % of alpha-olefin unit having 3 to 20 carbon atoms, (2) has number average molecular weight (Mn) of 500 to 10,000 and a molecular weight distribution (Mw/Mn, Mw is the weight average molecular weight) of 3 or less measured by Gel Permeation Chromatography (GPC) (3) has Kinematic Viscosity at 100° C. of 30 to 5,000, (4) has pour point of 30 to −45° C., and (5) has Bromine Number of 0.1 or less.

The invention relates to a hydrogenation method for producing an aromatics extraction raw material. The method adopts two hydrogenation units and performs different reactions at different temperatures, wherein the first hydrogenation unit is filled with protective agents with different specifications in a graded loading mode; the protective agents are mainly used for removing diene, delaying the coking of the top part of a catalyst bed layer and prolonging the running period of a device at a low temperature; the second hydrogenation unit is filled with a hydrorefining catalyst for desulfurization, denitrification and alkene saturation at a high temperature and alkene saturation as little as possible. The hydrogenation method broadens the source of the aromatics extraction raw material; through the method provided by the invention, gasoline fractions with high diene value content and high impurity content can be converted; and the obtained product has the nitrogen content and the sulphur content of less than 1 mu g/g, and the bromine value of less than 0.5 gBr/100g so as to meet the requirement of an aromatics extraction device on feeding.

The invention discloses a preparation method of polymaleic acid, belonging to the field of chemical technology and aiming at providing a preparation method of polymaleic acid with high product yield, low bromine number and stable quality, and meanwhile, the polymaleic acid average molecular weight of which is more than 5500 is suitable for commercial process. The preparation method has the technical key points that 1 part by weight of maleic anhydride, 1.2 to 1.4 parts by weight of distilled water and 0.015 to 0.02 parts by weight of mixture of transition metal ion M compound and ammonium salt are put into a reaction kettle once to be heated from 40 to 60 DEG C to be totally dissolved; then perhydrol is slowly added to polymerize under the condition of continuous stirring, polymerization reaction temperature is controlled to be 90 to 100 DEG C, and heat preservation reaction time is 1 to 2 hours, so that the polymaleic acid whose average molecular weight is bigger than 5500 can be obtained. The yield can be more than 99.0% (counted by maleic anhydride), bromine number is smaller than 30mg/g, and products have stable quality. The preparation method for polymaleic acid has environmentally-friendly and clean technology, produces no three wastes and has the advantages of convenient operation and low production cost, thus the preparation method of polymaleic acid is suitable for large-scale industrial production.

The present invention provides a dehydrogenation catalyst composite that is capable of providing a dehydrogenated hydrocarbon product characterized by a bromine number of at least 19. for hydrocarbons. The dehydrogenation catalyst of the present invention comprises a nano-sized complex containing a Group VIII component; a group IVA component and a sulfur containing capping agent; an alkali component; a halogen component; and a support with an inner core of alpha alumina and an outer layer comprising a mixture of gamma alumina and delta alumina.

The present invention discloses a catalytic system for preparing highly branched alkane from olefin, which contains novel nickel or palladium complexes. In the presence of the catalytic system, highly branched oily alkane mixture can be efficiently obtained from olefins (such as ethylene) under mild conditions. The alkane mixture has a low bromine number, and can be used as a processing aid(s) and lubricant base oil with high-performance. Provides also was a method for preparing the catalyst and a method for preparing an oily olefin polymer.

The invention provides a C5 petroleum resin hydrogenation method. The method includes: dissolving C5 petroleum resin into an organic solvent in a mixer, preheating, adding into a fixed bed hydrogenation reactor filled with a nickel-molybdenum hydrogenation catalyst, sending hydrogenated materials into a steam stripping tower, recycling the organic solvent extracted from the upper portion after refining the organic solvent through a distillation column, and obtaining C5 petroleum resin at the bottom of the steam stripping tower. By adoption of the catalyst prepared from a nickel-containing carrier in a specific crystal form, reactive metal utilization rate can be greatly improved, and catalyst preparation difficulty is lowered; in addition, due to adding of a selected active component, a synergistic effect is achieved, and C5 petroleum resin low in bromine number and high in chromaticity and stability can be obtained.

The invention aims to prepare a catalyst for non-hydrogenating olefin removal of aromatic hydrocarbon by using waste catalytic cracking catalyst. The catalyst for non-hydrogenating olefin removal of the aromatic hydrocarbon is prepared by the following steps: mixing the waste catalytic cracking catalyst with the metal content less than 5,000 ug/g and aluminum oxide dry glue powder; extruding into strips and forming; and roasting at the temperature of 540 DEG C for 4 hours to obtain the catalyst for non-hydrogenating olefin removal of the aromatic hydrocarbon, wherein the mass content of the waste catalytic cracking catalyst is 60 to 80 percent; the aluminum oxide content is 20 to 40 percent; and the acid content of the catalyst is 0.3 to 0.5 mmol/g, the specific surface area of the catalyst is 290 to 320 m<2>/g and the average aperture of the catalyst is 8.5 to 10 nm. When the catalyst is used for catalyzing the non-hydrogenating olefin removal of the aromatic hydrocarbon, the bromine number can be reduced from 3,000 mg/100 g to below 20 mg/100 g commonly and the aromatic hydrocarbon loss is less than 0.01 percent.

The invention relates to a method for removing unsaturated hydrocarbon and thiophene from coking benzene, which comprises the following steps: stirring potassium permanganate, a metal chloride water solution and coking benzene in a container for reaction; converting the unsaturated hydrocarbon and the thiophene in the coking benzene into substances capable of dissolving in water easily, and separating and washing the substances; and then refining to obtain the coking benzene. The method is suitable for coking benzene, coking crude benzene, petroleum benzene, methylbenzene, reagent benzene and the like, and ensures that the acid washing color index is not deeper than 0.1g/l, the bromine number is not higher than 0.03g/100ml, the total sulfur content is not higher than 1mg/kg, and the quality index reaches the quality level of the superior product of the coking benzene in China standard.

A near-infrared absorption spectrum of a hydrogenated compound (hydrogenated petroleum resin) in a form of a molten resin from which a hydrogenation solvent is separated in a hydrogenation solvent removing step is measured to calculate an aromatic content ratio and a softening point as physical property values of the hydrogenated compound based on analytical curve data. At least one of a temperature, pressure, reaction time and hydrogen content in a hydrogenating portion is controlled such that a difference between the aromatic content ratio and the bromine number measured in the near-infrared spectrometry and an aromatic content ratio and bromine number of a target hydrogenated petroleum resin pellet becomes small. At least one of a temperature and pressure in a thin-film evaporator is controlled such that a difference between a softening point measured in the near-infrared spectrometry and a softening point of the target hydrogenated petroleum resin pellet becomes small.

The invention provides a petroleum resin hydrogenation catalyst. The catalyst comprises a titanium oxide-aluminum oxide composite oxide carrier, Ni, an IB-group element and a VIB-group element, wherein the Ni, the IB-group element and the VIB-group element are supported by the carrier. Under catalysis of the catalyst, a petroleum resin hydrogenation reaction has high selectivity and a high conversion rate, and hydrogenated petroleum resin with high color purity, low bromine number and good thermal stability can be prepared. In addition, a preparing method of the catalyst is simple and low in cost and is suitable for industrial production.

Aqueous electrophoretic lacquer capable of being deposited cataphoretically, containing

• A) an aqueous dispersion of cationically modified polyurethane (meth)acrylates (a1) with terminal, ethylenically unsaturated (meth)acrylic double bonds, and reactive thinner (a2) with at least two ethylenically unsaturated (meth)acrylic double bonds, the (meth)acrylic double bonds of the mixture of (a1) and (a2) corresponding to a bromine number of 20 to 150 g bromine/100 g solids, and
• B) photoinitiators and optionally free-radical initiators capable of thermal activation,
  • the terminal, ethylenically unsaturated (meth)acrylic double bonds of the polyurethane (meth)acrylates being bonded with the anionically modified polyurethane prepolymer via urethane, urea, amide or ester groups,
  • and optionally conventional auxiliary substances and additives, pigments and/or fillers.

The invention provides a light aromatic hydrocarbon hydrogenation pre-hydrogenation process, wherein the process includes the following steps: a deweighted product oil after deweighting comes from a tank area, is pressurized to 2.1 MPa by a hydrogenation feed pump and is mixed with a pre-hydrogenation reaction circulating liquid and new hydrogen, then the mixture enters an inlet distributor of thebottom of a pre-hydrogenation reactor, and then passes through a catalyst bed layer from bottom to top; selective hydrogenation reaction of diene, styrene and a small amount of monoolefins is preformed; a liquid phase circulating material extracted from the side face of the pre-hydrogenation reactor is pressurized by a pre-hydrogenation circulating pump, is cooled by a pre-hydrogenation circulating cooler, is mixed with new hydrogen and raw materials, enters an inlet of the pre-hydrogenation reactor again, is circulated, is discharged from the top of the pre-hydrogenation reactor and is subjected to main hydrogenation reaction. Through the process, the olefin content of the pre-hydrogenated oil product of the process is obviously reduced, the bromine number is also obviously reduced, coking of the main hydrogenation reaction is effectively prevented, the main hydrogenation reaction with high catalytic activity is completed, and the operation cycle of the device is long.