The competitive and non-competitive hydroformylation of conjugated dienes starting with tetrarhodium dodecacarbonyl. An in-situ high-pressure infrared spectroscopic study
作者:Guowei Liu、Marc Garland
DOI:10.1016/s0022-328x(00)00369-7
日期:2000.8
known that the liquid-phase homogeneous unmodified rhodium catalysed hydroformylation of alkenes is poisoned by the presence of trace quantities of conjugateddienes. Nevertheless, some hydroformylation of conjugateddienes is possible with unmodified rhodium, and this reaction is in general slower than alkene hydroformylations at comparable reaction conditions. In the present contribution, we examined
众所周知,液相的均相未改性铑催化的烯烃加氢甲酰化会因存在痕量的共轭二烯而中毒。然而,在未改性的铑条件下,共轭二烯的加氢甲酰化反应还是可能的,而且在可比的反应条件下,该反应通常比烯烃的加氢甲酰化反应慢。在本贡献中,我们检查(A)烯烃的痕量的存在下催化性能的共轭二烯的杂质和(B)的各种使用铑二烯烃的催化行为4(CO)12在ñ -己烷溶剂中在293度在1.0-4.0 MPa CO和0.5-2.0 MPa H 2下。分析方法是原位高压红外光谱法。观察到(I)在有毒烯烃的加氢甲酰化中,大多数铑在这种竞争情况下与痕量的共轭二烯发生反应,而不与烯烃发生反应;以及(II)各种二烯加氢甲酰化的金属羰基光谱非常相似。在共轭二烯的加氢甲酰化中观察到的一次吸光度最大值出现在大约2109、2091、2087、2064、2049、2037、2030、2020、2012、1999和1990 cm -1。给出铑的已知化学
PREPARATION OF CYANO-ALIPHATIC ALDEHYDES
申请人:Dow Global Technologies LLC
公开号:EP2348015A2
公开(公告)日:2011-07-27
A process for preparing one or more cyano-aliphatic aldehydes is described. The process comprises (a) preparing an olefinically-unsaturated cyano-aliphatic composition via a Diels Alder reaction of a diene and a dienophile composition; (b) contacting in a hydroformylation zone the olefinically-unsaturated cyano-aliphatic composition with carbon monoxide and hydrogen in the presence of a transition metal-organophosphorus ligand complex catalyst under hydroformylation conditions sufficient to prepare a hydroformylation product (c) mixing in an extraction zone the hydroformylation product composition with water under conditions sufficient to obtain by phase separation a nonpolar phase a polar phase comprising water and the one or more cyano-aliphatic aldehydes; (d) separating the one or more cyano-aliphatic aldehyde products from the hydroformylation product composition.
COMPOSITION FOR REMOVAL OF SULPHUR-CONTAINING COMPOUNDS
申请人:Kuraray Co., Ltd.
公开号:EP3121251A1
公开(公告)日:2017-01-25
Disclosed is a composition capable of removing safely and efficiently a sulfur-containing compound contained in a hydrocarbon, particularly hydrogen sulfide, an -SH group-containing compound, or a mixture thereof. Provided is a composition for removal of a sulfur-containing compound in a hydrocarbon, the sulfur-containing compound being hydrogen sulfide, an -SH group-containing compound or a mixture thereof: the composition containing a dialdehyde having 6 to 16 carbon atoms as an active ingredient.
COMPOSITION FOR REMOVING SULFUR-CONTAINING COMPOUNDS
申请人:Kuraray Co., Ltd.
公开号:EP3252129A1
公开(公告)日:2017-12-06
Provided is a composition capable of safely and efficiently removing a sulfur-containing compound, especially hydrogen sulfide, an -SH group-containing compound or a mixture thereof contained in a hydrocarbon, and not causing metal corrosion in devices. The composition is for removing a sulfur-containing compound in a hydrocarbon, wherein the sulfur-containing compound is hydrogen sulfide, an -SH group-containing compound or a mixture thereof, and the composition contains a dialdehyde having 6 to 16 carbon atoms and a polyalkylene glycol.
A method for suppressing metal corrosion attributable to a compound having an SH structure contained in a hydrocarbon, including adding at least one aldehyde selected from the group consisting of a monoaldehyde having 4 or more carbon atoms and a dialdehyde having 3 or more carbon atoms, to the hydrocarbon.
一种抑制可归因于碳氢化合物中所含 SH 结构化合物的金属腐蚀的方法,包括向碳氢化合物中添加至少一种醛,该醛选自具有 4 个或更多碳原子的单醛和具有 3 个或更多碳原子的二醛所组成的组。