摘要:
The invention relates to a method for producing an isocyanate, comprising hydrogenation of an amimne-ciontaining mixture (Gi) in the presence of a copper containing hydrogenation catalyst to give a mixture (Gii) containing the amine and reacting the mixture (Gii) with phosgene to give a mixture (Gii) containing the isocyanate. The invention further relates to the isocyanate which may be produced by said method.
摘要:
The degradation of an absorbent solution comprising organic compounds provided with an amino functional group, in aqueous solution, is substantially reduced in the presence of a small amount of degradation-inhibiting agents having a thiocarbonyl functional group which are defined by the general formula: Formula (I). The absorbent solution is used to deacidify a gaseous effluent.
摘要:
La présente invention concerne une composition renfermant au moins un composé bicyclique aromatique de formule générale (I): ou un sel ou analogue chiral d'un tel composé, caractérisée en ce qu'elle comprend en outre au moins un 2-alkyl alcan-1-ol comprenant de 12 à 36 atomes de carbone, ou un ester d'un tel alcool. Le composé de formule (I) est de préférence l'acide 4-(3,5,5,8,8-pentaméthyl-5,6,7,8-tétrahydro-2-naphtylthio)benzoïque. L'invention concerne également les utilisations de cette composition, ainsi qu'un procédé de solubilisation du composé de formule (I) ci-dessus au moyen d'au moins un 2-alkyl alcan-1-ol.
摘要翻译:增溶的双环芳族化合物(I)的方法,包括用2-烷基-1-烷醇(Ⅱ)具有12-36车原子混合,或上的酯(II)。 增溶通式(I)的双环芳族化合物的方法包括用2-烷基-1-烷醇(II)HAVI 12-36碳原子或(II)的酯的混合它。 R1 = H,甲基CH 2 OR 3,CH2OCOR4,OR 5,O(CH 2)M(CO)N R 6,COR 7,-COOR 8或SOpR9; R2 = H,卤素,低级烷基,NO 2,OCOR4,或OR 9 NR 9 R 10; Ar为一组式(a)的 - (E); X = O,SOT或NR 9; Y,Z = O,或CR11R12 SOT,但不能同时O或SOT; M = 1-3; n = 0或1; P = 0-3; T = 0-2; R3,R5,R9,R10,R11,R12 = H或低级烷基; R4 =低级烷基; R6 =低级烷基或杂环基; R7 = H,低级烷基或NR'R ''; R“ R”‘= H,低级烷基,单或多羟烷基,芳基或氨基酸,肽或糖残基R’+ R‘’OPTIONALLY substituiertem =一起形成环; R8 = H,1-20C的烷基,链烯基,单或多羟烷基,任选取代的芳基或芳烷基,或糖,氨基酸或肽残基。 因此独立claimsoft被包括为一个组合物,其包含(I)和酯(II)或(II)。
摘要:
A method is provided for purifying crude N-acetyl-para-aminophenol (APAP) containing color bodies or their precursors, the method comprising: a) forming a solution of the crude APAP; and b) subsequently contacting the solution with substoichiometric quantities of an acetylating agent for a sufficient period of time to convert said color bodies or their precursors to substantially non-color bodies/stable, colorless substances; said quantities of acetylating agent provided is such that substantially none of the APAP is converted to other compounds.