4098 results about "Butadiene Dioxide" patented technology

The preparation of olefins from steam cracker or refinery C4 streams is carried out by selective hydrogenation of butadienes and acetylenic impurities in the steam cracker or refinery C4 stream, with simultaneous or subsequent, at least partial isomerization of 1-butene to 2-butene, followed by removal of i-butene from the C4 stream by reaction with an alcohol to form an ether, followed by removal of oxygen-containing impurities from the C4 stream using adsorber materials, followed by two-stage metathesis of the butenes in the C4 stream by conversion of 1-butene and 2-butene present in the C4 stream into propene and 2-pentene and subsequent reaction of the 2-pentene with ethene in the presence of a metathesis catalyst to form propene and 1-butene. Optionally, butadiene may be removed from the C4 stream by extractive distillation in a preliminary step.

In a multi-piece solid golf ball comprising a solid core consisting of a center core and an outer core, an inner cover layer and an outer cover layer, the solid core is molded from a rubber composition comprising a base rubber composed of (a) a polybutadiene having a high cis-1,4 content, a minimal 1,2 vinyl content and a viscosity η of up to 600 mPa·s at 25° C. as a 5 wt % toluene solution, being synthesized using a rare-earth catalyst, in combination with (b) another diene rubber, (c) an unsaturated carboxylic acid, (d) an organosulfur compound, (e) an inorganic filler, and (f) an organic peroxide; and the center core has a specific JIS-C hardness on its center and a specific JIS-C hardness on its surface and the certain difference, the outer core is harder than the surface hardness of the center core, the cross-sectional hardness of 1 mm outside from the border between the center core and the outer core is a specific range on JIS-C hardness, the surface of the outer core has a specific JIS-C hardness, the inner cover layer has a specific Shore D hardness; the outer cover layer has a specific Shore D hardness; and the outer cover layer has a lower Shore D hardness than the inner cover layer. This combination of features gives the ball a good, soft feel upon impact and an excellent spin performance that provides increased distance.

There is disclosed a pneumatic tire having a component comprising a vulcanizable rubber composition comprising, based on 100 parts by weight of elastomer (phr), from about 40 to about 90 phr of a solution polymerized styrene-butadiene having a styrene content of greater than 38 percent by weight; from about 10 to about 60 phr of at least one additional elastomer; and from about 10 to about 70 phr of a process oil having a glass transition temperature of from about −80° C. to about −40° C. and a polycyclic aromatic content of less than 3 percent by weight as determined by the IP346 method.

The invention relates to a formula of soles of PU-simulated foaming sneakers through injection, which comprises the following raw materials in percentage by mass: 40 percent of 21 percent ethylene-vinyl acetate copolymer (EVA 7360), 16.7 percent of styrene butadiene copolymer SBBSJT-83, 12.5 percent of ethylene octylene copolymer POE8130, 8.3 percent of ethylene-propylene-diene copolymer 3745P, 65.9 percent of wear-resisting agent A-18, 8.3 percent of talcpowder, 0.25 percent of stearic acid, 0.42 percent of zinc stearate, 0.9 percent of zinc oxide, 0.08 percent of bridging auxiliary agent ET-102, 0.75 percent of bridging agent DCP, 1.7 percent of high-temperature foaming agent AC-6000H, 2.5 percent of titanium white powder R-103 and 1.7 percent of master batch. The preparation method comprises the steps of banburying, mixing, granulation, injection molding, physical property tests and the like. Thus, in the research and development and application, the PU-simulated foaming soles not only have the physical and chemical properties of no crease marks, high elasticity, low compression and wear resistance of PU soles, and but also have the advantages of low production cost, light specific gravity, good limited-slip properties, no hydrolysis and long service life.

The invention relates to a selective hydrogenation process for a C4 material flow with high concentration of butadiene. The selective hydrogenation process comprises the following steps of: enabling the C4 material flow with the high concentration of butadiene to pass through one or more fixed bed hydrogenation reactors (I) with circulation pipelines, carrying out a selective hydrogenation reaction on the C4 mixture with high concentration of butadiene under the action of a catalyst to remove the butadiene and alkyne and generate butylene, enabling the reactor to pass through a terminal reactor (II) without the circulation pipeline, and further removing the residual butadiene and alkyne from the C4 material flow with the low concentration of butadiene. By utilizing the selective hydrogenation process and the catalyst provided by the invention, the controlled concentration range of the butadiene and the C4 alkyne of the C4 material flow is 5-80wt%, the concentrations of the butadiene and the alkyne of the hydrogenated C4 material flow can be respectively reduced to below 10ppm, the selectivity of the 1-butene generation by the butadiene can be more than 50%, and the butadiene can be taken as the raw material of preparing the 1-butene. According to the selective hydrogenation process disclosed by the invention, the C4 material flow is reasonably utilized.

This invention relates to a process to polymerize olefins comprising contacting, in a polymerization system, olefins having three or more carbon atoms with a catalyst compound, activator, optionally comonomer, and optionally diluent or solvent, at a temperature above the cloud point temperature of the polymerization system and a pressure no lower than 10 MPa below the cloud point pressure of the polymerization system, where the polymerization system comprises any comonomer present, any diluent or solvent present, the polymer product, where the olefins having three or more carbon atoms are present at 40 weight % or more, wherein the metallocene catalyst compound is represented by the formula: where M is a transition metal selected from group 4 of the periodic table; each R1 is independently selected from the group consisting of hydrogen, hydrocarbyl, substituted hydrocarbyl and functional group, and any two R1 groups may be linked, provided that if the two R1 groups are linked, then they do not form a butadiene group when M is Zr; each R2 is independently selected from the group consisting of hydrogen, hydrocarbyl, substituted hydrocarbyl or a functional group, and two or more R2 groups may be linked together to form an aliphatic or aromatic ring; R3 is carbon or silicon; R4 is hydrogen, hydrocarbyl, substituted hydrocarbyl or a functional group; a is 0, 1, or 2; R5 is hydrogen, hydrocarbyl, substituted hydrocarbyl or a functional group, R4 and R5 may be bound together to form a ring, and R5 and R3 may be bound together to form a ring; b is 0, 1, or 2; R6 is carbon or silicon; and R4 and R6 may be bound together to form a ring; each R7 is independently selected from the group consisting of hydrogen, hydrocarbyl, substituted hydrocarbyl and a functional group; each R8 is independently selected from the group consisting of hydrogen, hydrocarbyl, substituted hydrocarbyl and a functional group, and R7 and R8 may be linked together to form an aliphatic or aromatic ring; each R9 is independently selected from the group consisting of hydrogen, hydrocarbyl, substituted hydrocarbyl and a functional group, and two R9 groups may be linked together to form a ring, R9 and R8 may be linked together to form a ring, R9 and R16 may be linked together to form a ring, R9 and R11 may be linked together to form a ring; c is 0, 1 or 2; R10 is -M2(R16)h- where M2 is B, Al, N, P, Si or Ge, h is an integer from 1 to 2, such that the valence of M2 is filled, and R16 is hydrogen, hydrocarbyl, substituted hydrocarbyl or a functional group, and two R16 groups may be linked together to form a ring; d is 0, 1, or 2; each R11 is independently selected from the group consisting of hydrogen, hydrocarbyl, substituted hydrocarbyl and a functional group, and two R11 groups may be linked together to form a ring. R11 and R8 may be linked together to form a ring. R11 and R16 may be linked together to form a ring; e is 0, 1, or 2; where the sum of c, d, and e is 1, 2 or 3; R12 is carbon or silicon; R13 is hydrogen, hydrocarbyl, substituted hydrocarbyl or a functional group, and R13 and R14 may be bound together to form a ring, and R13 and R15 may be bound together to form a ring, when g is 0; f is 0, 1, or 2; R14 is hydrogen, hydrocarbyl, substituted hydrocarbyl or a functional group, and R14 and R12 may be bound together to form a ring, when f is 0; g is 0, 1, or 2; and R15 is carbon or silicon.

The invention relates to a rare-earth catalyst for catalyzing selective polymerization of isoprene or butadiene, while the catalyst system composed of the rare-earth catalyst can catalyze isoprene or butadiene to prepare polyisoprene or butadiene rubber with high cis-1, 4- structure. The rare-earth catalyst is composed of split-core type rare-earth complex, alkyl aluminium and organic boron salt. The solvent of polymerization is toluene or chlorobenzene. When catalyzes the polymerization of isoprene, the alkyl aluminium and split-core type rare-earth complex are rationed at 10-40, the organic boron salt and split-core type rare-earth complex are rationed at 1-3, the polymerization temperature is -20-80DEG C, the polymerization time is 0.5-2h, the monomer conversation ratio can reach 100% most, and the cis-1, 4 content of polymer is 55.0-98.8%, and when catalyzes the polymerization of butadiene, the alkyl aluminium and split-core type rare-earth complex are rationed at 10-40, the organic boron salt and split-core type rare-earth complex are rationed at 1-3, the polymerization temperature is -20-80DEG C, the polymerization time is 0.5-2h, the monomer conversation ratio can reach 100% most, and the cis-1, 4 content of polymer is 90.1-99.99%.

A method of forming a thin film on a substrate which includes a step of contacting a surface with a precursor compound having a transition metal and one or more alkyl-1,3-diazabutadiene ligands is provided. The resulting modified surface is then contacted with an activating compound.