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    • 1. 发明授权
    • Process for the production of isocyanates
    • 生产异氰酸酯的方法
    • US07504533B2
    • 2009-03-17
    • US11409940
    • 2006-04-24
    • Matthias BöhmWolfgang LorenzBill L. Brady, Jr.Donald L. Pferdehirt
    • Matthias BöhmWolfgang LorenzBill L. Brady, Jr.Donald L. Pferdehirt
    • C07C263/00C07C249/00
    • C07C263/10C01B7/0706C01B7/0731C07C263/20C07C265/14
    • Isocyanates are produced by a) reacting at least one amine with phosgene, optionally in the presence of a solvent to produce the corresponding isocyanate and a stream containing hydrogen chloride, phosgene and optionally solvent, low-boiling compounds and inert substances is obtained, b) separating the stream containing hydrogen chloride, phosgene and optionally solvent, low-boiling compounds and inert substances in an at least two-stage sequence of absorption steps that includes (1) at least one isothermal absorption step and (2) at least one adiabatic absorption step, to obtain (i) a hydrogen chloride stream containing phosgene in concentrations of at most 0.5 wt. % (based on the weight of the hydrogen chloride stream) and (ii) a liquid phosgene stream, and c) recycling the liquid phosgene stream (ii) to the reaction of amine with phosgene.
    • 异氰酸酯通过以下方法制备:a)任选地在溶剂存在下使至少一种胺与光气反应以产生相应的异氰酸酯,并且获得含有氯化氢,光气和任选溶剂的低沸点化合物和惰性物质的流,b) 在至少两级的吸收步骤序列中分离含有氯化氢,光气和任选溶剂的低沸点化合物和惰性物质,其包括(1)至少一个等温吸收步骤和(2)至少一个绝热吸收 步骤,以获得(i)含有至多0.5重量%浓度的光气的氯化氢流。 %(基于氯化氢流的重量)和(ii)液体光气流,和c)将液体光气流(ii)再循环到胺与光气的反应中。
    • 6. 发明申请
    • Process for the production of isocyanates
    • 生产异氰酸酯的方法
    • US20070249859A1
    • 2007-10-25
    • US11409940
    • 2006-04-24
    • Matthias BohmWolfgang LorenzBill BradyDonald Pferdehirt
    • Matthias BohmWolfgang LorenzBill BradyDonald Pferdehirt
    • C07C263/10
    • C07C263/10C01B7/0706C01B7/0731C07C263/20C07C265/14
    • Isocyanates are produced by a) reacting at least one amine with phosgene, optionally in the presence of a solvent to produce the corresponding isocyanate and a stream containing hydrogen chloride, phosgene and optionally solvent, low-boiling compounds and inert substances is obtained, b) separating the stream containing hydrogen chloride, phosgene and optionally solvent, low-boiling compounds and inert substances in an at least two-stage sequence of absorption steps that includes (1) at least one isothermal absorption step and (2) at least one adiabatic absorption step, to obtain (i) a hydrogen chloride stream containing phosgene in concentrations of at most 0.5 wt. % (based on the weight of the hydrogen chloride stream) and (ii) a liquid phosgene stream, and c) recycling the liquid phosgene stream (ii) to the reaction of amine with phosgene.
    • 异氰酸酯通过以下方法制备:a)任选地在溶剂存在下使至少一种胺与光气反应以产生相应的异氰酸酯,并且获得含有氯化氢,光气和任选溶剂的低沸点化合物和惰性物质的流,b) 在至少两级的吸收步骤序列中分离含有氯化氢,光气和任选溶剂的低沸点化合物和惰性物质,其包括(1)至少一个等温吸收步骤和(2)至少一个绝热吸收 步骤,以获得(i)含有至多0.5重量%浓度的光气的氯化氢料流。 %(基于氯化氢流的重量)和(ii)液体光气流,和c)将液体光气流(ii)再循环到胺与光气的反应中。
    • 9. 发明授权
    • Process for the preparation of isocyanates in the gas phase
    • 在气相中制备异氰酸酯的方法
    • US09024057B2
    • 2015-05-05
    • US12632117
    • 2009-12-07
    • Klaus BiskupRainer BrunsWolfgang LorenzFritz PohlFriedhelm SteffensVolker Michele
    • Klaus BiskupRainer BrunsWolfgang LorenzFritz PohlFriedhelm SteffensVolker Michele
    • C07C263/00C07C263/10
    • C07C263/10C07C265/14
    • Aromatic isocyanates are produced by reacting one or more aromatic primary amines with phosgene in the gas phase. The phosgene and primary aromatic amine(s) are reacted at a temperature above the boiling temperature of the amine(s) in a reactor having a reaction space which is essentially rotationally symmetric to the direction of flow. The flow fate, averaged over the cross-section, of the reaction mixture along the axis of the essentially rotationally symmetric reaction space in the section of the reaction space in which the conversion of the amine groups into isocyanate groups is between 4 and 80% is not more than 8 m/sec. The flow rate averaged over the cross-section of the reaction mixture along the axis of the essentially rotationally symmetric reaction space in the section of the reaction space in which the conversion of the amine groups into isocyanate groups is 4 to 80% is always below the flow rate averaged over the cross-section at the start of this section.
    • 通过一种或多种芳族伯胺与气相中的光气反应制备芳族异氰酸酯。 光气和伯芳基胺在具有反应空间的反应器中在高于胺的沸点温度的温度下反应,反应空间基本上与流动方向旋转对称。 反应混合物沿着反应空间部分中基本上旋转对称的反应空间轴线的横截面平均流动,其中胺基转化为异氰酸酯基的反应空间为4-80% 不超过8米/秒。 反应混合物的横截面上的平均流量在反应空间的基本上旋转对称的反应空间的轴上,其中胺基转化为异氰酸酯基团的部分总是低于 在本节开头的横截面上平均流量。