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    • 1. 发明授权
    • Method for inhibiting polymerization during the recovery and purification of unsaturated mononitriles
    • 在不饱和单腈回收和纯化期间抑制聚合的方法
    • US06984749B2
    • 2006-01-10
    • US10309962
    • 2002-12-04
    • Bruce I. RosenBruce E. Firth
    • Bruce I. RosenBruce E. Firth
    • C07C255/03
    • C07C253/26C07C253/32C07C255/08
    • Economical processes are disclosed for recovery and refining of valuable nitrogen-containing organic compounds formed by catalytic oxidation of least one feed compound selected from the group consisting of propane, propylene, isobutane and isobutylene in the presence of ammonia to produce a gaseous. Processes of the invention include quenching the gaseous reactor effluent with an aqueous quench liquid; forming an aqueous solution comprising the corresponding unsaturated mononitrile, hydrogen cyanide and other organic co-products; and using an integrated sequence of distillations and phase separations to recover for recycle of a useful aqueous liquid, and obtain the desired nitrogen-containing products. According to the invention aqueous solutions are fractionated in an integrated system of multi-stage columns while an effective polymerization inhibiting amount of at least one member of a preselected class of p-phenylenediamine compounds is maintained therein.
    • 公开了经济方法用于在氨的存在下通过催化氧化选自丙烷,丙烯,异丁烷和异丁烯的至少一种进料化合物形成的有价值的含氮有机化合物来回收和精炼以产生气体。 本发明的方法包括用水淬火液淬火气态反应器流出物; 形成包含相应的不饱和单腈,氰化氢和其它有机副产物的水溶液; 并使用一体化的蒸馏和相分离序列来回收有用的含水液体的再循环,并获得所需的含氮产物。 根据本发明,水溶液在多级柱的一体化系统中分级,同时保持有效聚合抑制量的至少一种预选类对苯二胺化合物。
    • 5. 发明授权
    • Method for inhibiting polymerization during the recovery and purification of unsaturated mononitriles
    • 在不饱和单腈回收和纯化期间抑制聚合的方法
    • US07282600B2
    • 2007-10-16
    • US10852277
    • 2004-05-24
    • Bruce I. RosenBruce E. Firth
    • Bruce I. RosenBruce E. Firth
    • C07C255/08
    • C07C253/26C07C253/32C07C255/08
    • Economical processes are disclosed for recovery and refining of valuable nitrogen-containing organic compounds formed by catalytic oxidation of least one feed compound selected from the group consisting of propane, propylene, isobutane and isobutylene in the presence of ammonia to produce a gaseous. Processes of the invention include quenching the gaseous reactor effluent with an aqueous quench liquid; forming an aqueous solution comprising the corresponding unsaturated mononitrile, hydrogen cyanide and other organic co-products; and using an integrated sequence of distillations and phase separations to recover for recycle of a useful aqueous liquid, and obtain the desired nitrogen-containing products. According to the invention aqueous solutions are fractionated in an integrated system of multi-stage columns while an effective polymerization inhibiting amount of at least one member of a preselected class of p-phenylenediamine compounds is maintained therein.
    • 公开了经济方法用于在氨的存在下通过催化氧化选自丙烷,丙烯,异丁烷和异丁烯的至少一种进料化合物形成的有价值的含氮有机化合物来回收和精炼以产生气体。 本发明的方法包括用水淬火液淬火气态反应器流出物; 形成包含相应的不饱和单腈,氰化氢和其它有机副产物的水溶液; 并使用一体化的蒸馏和相分离序列来回收有用的含水液体的再循环,并获得所需的含氮产物。 根据本发明,水溶液在多级柱的一体化系统中分级,同时保持有效聚合抑制量的至少一种预选类对苯二胺化合物。
    • 8. 发明授权
    • Process for recovery of aromatic acid and dihydric alcohol from waste
polyester resins
    • 从废聚酯树脂中回收芳香酸和二元醇的方法
    • US5473102A
    • 1995-12-05
    • US318228
    • 1994-10-05
    • Floyd JohnsonDavid L. SikkengaKalpana DanawalaBruce I. Rosen
    • Floyd JohnsonDavid L. SikkengaKalpana DanawalaBruce I. Rosen
    • C07C51/09C07C67/60
    • C07C51/09
    • Processes are disclosed for recovery and purification of dibasic aromatic acids from waste polyester film, fiber, bottles, manufacturing residues, and other manufactured articles. The processes comprises: depolymerization of polyester resin in a molten polyester resin containing solvent with superheated stem, and vaporization of the aromatic carboxylic acid and other volatile products of hydrolysis to obtain a vaporized mixture containing aromatic acid, dihydric alcohol, other volatile products of hydrolysis, and water. This vapor mixture is, advantageously, substantially free of less volatile and non-volatile impurities including metals, and many colored and color causing compounds, which are, typically, found in post-consumer polyester resins.Crude acid is, optionally, purified by hydrogenated in an aqueous solution at elevated temperatures and pressures in the presence of hydrogen and an insoluble metal-containing catalyst, which is thereupon separated from the aqueous solution, and purified dibasic aromatic acid recovered by crystallization and mechanical separation from the aqueous solution. Purified terephthalic acid has, typically, a L*-value in a rage of from about 95 to about 100, an a*-value in a rage of from about -1 to about +1, and a b*-value in a range of from about 0.5 to about 2.
    • 公开了用于从废聚酯膜,纤维,瓶,制造残余物和其它制品中回收和纯化二元芳香酸的方法。 该方法包括:将聚酯树脂在含有过热干燥的溶剂的熔融聚酯树脂中解聚,并将芳族羧酸和其它挥发性水解产物汽化,得到含有芳族酸,二元醇,水解的其它挥发性产物的蒸发混合物, 和水。 这种蒸气混合物有利地基本上不含挥发性和非挥发性的杂质,包括金属,以及通常在消费后聚酯树脂中发现的许多着色和着色的化合物。 任选地,在氢气和不溶性金属的催化剂存在下,在高温和高压下,在水溶液中氢化,然后与水溶液分离,纯化纯酸,通过结晶和机械回收的纯化的二元芳香酸 与水溶液分离。 纯化的对苯二甲酸通常具有约95至约100的浓度的L *值,在约-1至约+1的范围内的a *值和在一定范围内的ab * 约0.5至约2。
    • 9. 发明授权
    • Process for recovery of aromatic acid from waste polyester resin
    • 从废聚酯树脂中回收芳香酸的方法
    • US5414113A
    • 1995-05-09
    • US138917
    • 1993-10-18
    • Jeffrey L. BroekerJohn A. MacekMossman: Allen B.Bruce I. RosenThomas M. Bartos
    • Jeffrey L. BroekerJohn A. MacekMossman: Allen B.Bruce I. RosenThomas M. Bartos
    • C07C51/09C07C51/16
    • C07C51/09
    • Processes are disclosed for recovery and purification of dibasic aromatic acids from waste polyester film, fiber, bottles, manufacturing residues, and other manufactured articles. The processes comprises: depolymerizing polyester resin in a solvent under conditions suitable for hydrolysis of ester bonds to obtain a mixture containing a solution of aromatic acid and impurities consisting of alcohol and/or other components of the resin; burning impurities in a liquid-phase oxidation with an oxygen-containing gas in the presence of an oxidation catalyst at elevated pressures and temperatures, to obtain an oxidation product containing the desired aromatic acid; and crystallizing and separating from the oxidation system a resulting crude dibasic aromatic acid. Crude acid is, optionally, hydrogenated in an aqueous solution at elevated temperatures and pressures in the presence of hydrogen and an insoluble metal-containing catalyst, which is thereupon separated from the aqueous solution, and purified dibasic aromatic acid recovered by crystallization and mechanical separation from the aqueous solution. Purified terephthalic acid has, typically, a L*-value in a range of from about 95 to about 100, an a*-value in a range of from about -1 to about +1, and a b*-value in a range of from about 0.5 to about 2.
    • 公开了用于从废聚酯膜,纤维,瓶,制造残余物和其它制品中回收和纯化二元芳香酸的方法。 该方法包括:在适于水解酯键的条件下,在溶剂中解聚聚酯树脂,得到含有芳族酸溶液和由醇和/或树脂的其它组分组成的杂质的混合物; 在氧化催化剂存在下,在升高的压力和温度下,用含氧气体进行液相氧化中的杂质,得到含有所需芳香酸的氧化产物; 并从氧化体系中结晶并分离得到的粗二元芳香酸。 任选地,在氢气和不溶性金属的催化剂存在下,在高温和高压下,在水溶液中氢化粗酸,随后将其与水溶液分离,通过结晶和机械分离回收的纯化的二元芳香酸 水溶液。 纯化的对苯二甲酸通常具有在约95至约100的范围内的L *值,在约-1至约+1的范围内的a *值和在 约0.5至约2。