CAS: 21679-46-9; Cobalt Tris(Acetylacetonate)

专利信息

专利号:US-2015037240-A1
优先权日:2012-03-12
标 题 :Methods of preparing catalysts for the chirally selective synthesis of single-walled carbon nanotubes
发明人：CHEN YUAN
权利人:UNIV NANYANG TECH
摘要:Methods of preparing a sulfur-containing catalyst for the chirally selective synthesis of single-walled carbon nanotubes are presented. Sulfur-containing catalysts for the chirally selective synthesis of single-walled carbon nanotubes, the catalysts comprising sulfur-doped transition metal as active phase on a support, and methods of forming single-walled carbon nanotubes having a selected chirality using the catalysts are also presented.

专利号:US-12252397-B2
优先权日:2019-05-02
标题:Process for the synthesis of nanoparticles of transition metal chalcogenides
发明人：MONIKA MONIKA; PODDAR PANKAJ
权利人:COUNCIL SCIENT IND RES
摘要:A process for the synthesis of transition metal chalcogenides (TMC) having formula (I). More particularly, the present work relates to a one pot single phase process for the synthesis of a TMC system having formula (I) by wet chemistry. Formula (I) is represented as Ax-By.

专利号:US-4463146-A
优先权日:1982-12-23
标题:Syndiotactic 1,2-polybutadiene synthesis process
发明人：DONBAR KEN W; BARBOUR JOHN J; HENDERSON JAMES N; BELL ANTHONY J
权利人:GOODYEAR TIRE & RUBBER
摘要:This invention reveals a very useful process for producing polybutadiene composed essentially of syndiotactic 1,2-polybutadiene in tetrahydrofuran comprising polymerizing 1,3-butadiene in said tetrahydrofuran in the presence of (1) a catalyst composition microencapsulated in a polyene product which contains (a) at least one cobalt compound selected from the group consisting of (i) β-diketone complexes of cobalt, (ii) β-keto acid ester complexes of cobalt, (iii) cobalt salts of organic carboxylic acids having 6 to 15 carbon atoms, and (iv) complexes of halogenated cobalt compounds of the formula CoX n , wherein X represents a halogen atom and n represents 2 or 3, with an organic compound selected from the group consisting of tertiary amines, alcohols, tertiary phosphines, ketones and N,N-dialkylamides, and (b) at least one organoaluminum compound of the formula AlR 3 , wherein R represents a hydrocarbon radical of 1 to 6 carbon atoms; and (2) carbon disulfide. This polymerization technique is very useful in the synthesis of syndiotactic 1,2-polybutadiene which will be used in articles for packaging, transportation, or storing of foods since it employs tetrahydrofuran as its polymerization medium.

专利号:US-12076715-B1
优先权日:2021-04-15
标 题:Synthesis and characterization of air-stable iron-based catalysts for Suzuki-Miyaura cross-coupling reactions of alkyl halides and aryl boronic esters
发明人：WONG ALEXANDER; BYERS JEFFERY
权利人:THE TRUSTEES OF BOSTON COLLEGE
摘要:This disclosure relates to novel catalysts for Suzuki-Miyaura cross-coupling reactions, the use thereof, and the methods of making the same.

专利号:US-6310152-B1
优先权日:2000-10-24
标题 :Synthesis of elastomeric high trans-1,4-polybutadiene
发明人：CASTNER KENNETH FLOYD
权利人:GOODYEAR TIRE & RUBBER
摘要:This invention is based upon the unexpected discovery that elastomeric trans-1,4-polybutadiene can be made by utilizing a catalyst system that is comprised of an organocobalt compound, an organoaluminum compound, a para-alkyl substituted phenol, and ortho-phenyl phenol wherein the molar ratio of the para-substituted phenol to the organoaluminum compound is within the range of about 1.2:1 to about 1.8:1, and wherein the molar ratio of the ortho-phenyl phenol to the organoaluminum compound is within the range of about 0.7:1 to about 1.3:1. Accordingly, the elastomeric trans-1,4-polybutadiene made by the process of this invention does not need to be heated, such as in a hot-house, before being used in making rubber stocks. This invention more specifically discloses a process for synthesizing elastomeric trans-1-4-polybutadiene by polymerizing 1,3-butadiene monomer in the presence of a catalyst system that is comprised of an organocobalt compound, an organoaluminum compound, a para-alkyl substituted phenol, and ortho-phenyl phenol, wherein the molar ratio of the para-substituted phenol to the organoaluminum compound is within the range of about 1.2:1 to about 1.8:1, and wherein the molar ratio of the ortho-phenyl phenol to the organoaluminum compound is within the range of about 0.7:1 to about 1.3:1.

专利号:US-5834573-A
优先权日:1997-05-21
标题 :Synthesis of trans-1,4-polybutadiene
发明人：CASTNER KENNETH FLOYD
权利人:GOODYEAR TIRE & RUBBER
摘要:By utilizing the techniques of this invention, trans-1,4-polybutadiene can be synthesized continuously to a high level of conversion utilizing a low level of a highly active cobalt-based catalyst system. The trans-1,4-polybutadiene made with the cobalt-based catalyst system of this invention also typically has a molecular weight which is acceptable for use in tire applications without the need for employing a molecular weight regulator. It is also not typically necessary to utilize a gel inhibitor, such as carbon disulfide, in the polymerizations of this invention. Since a low level of residual cobalt is present in the trans-1,4-polybutadiene which is made utilizing the catalyst system of this invention, it is much more stable than trans-1,4-polybutadiene made with standard cobalt-based catalyst systems. This invention specifically relates to a process for synthesizing trans-1,4-polybutadiene by polymerizing 1,3-butadiene monomer in the presence of a catalyst system which is comprised of cobalt (III) acetylacetonate, an organoaluminum compound and a para-alkyl-substituted phenol, wherein the cobalt (III) acetylacetonate is mixed with the para-substituted phenol prior to the polymerization. Such polymerizations can be conducted on a batch or a continuous basis.