Abstract:
PROBLEM TO BE SOLVED: To provide a process for recovering and regenerating ammonia contained in an effluent liquid obtained from a reaction zone for generating a corresponding aliphatic nitrile by reacting ammonia and oxygen with a paraffin. SOLUTION: The process for recovering unreacted ammonia from a reactor effluent liquid obtained from a reaction zone used for generating acrylonitrile or methacrylonitrile comprises a step for quenching the effluent liquid from the reactor with an aqueous solution of ammonium phosphate, where the ratio of an ammonium ion to a phosphate ion in the solution is between approximately 0.7 to approximately 1.3, preferably approximately 0.9 to 1.2. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an improved catalyst for the catalytic hydrogenation of maleic acid, maleic anhydride or other hydrogenatable precursor to 1,4-butanediol and tetrahydrofuran. SOLUTION: The invention is a catalyst essentially comprising palladium, silver, rhenium and iron. Another embodiment of the invention is a method for making such catalyst for the production of 1,4-buthanediol comprising: (i) oxidizing a carbon support by bringing the carbon support contact with an oxidizing agent; (ii) impregnating in one or more impregnation steps comprising contacting a carbon support with a metal source of palladium, silver, rhenium and iron; (iii) drying the impregnated carbon support to remove solvent after each impregnation step; and (iv) heating the impregnated carbon support from ambient temperature to a temperature of between about 100°C and about 350°C under reducing conditions. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To additionally increase a generation of byproducts of hydrogen cyanide with no considerable reduction in yield of nitrile. SOLUTION: A catalyst composition comprising a complex of catalytic oxides of iron, bismuth, molybdenum and calcium and characterized by the following empirical formula: A a B b C c D d Fe e Bi f Mo 12 O x , wherein A= one or more of Li, Na, K, Rb and Cs or their mixture; B= one or more of Mg, Mn, Ni, Co, Ag, Pb, Re, Cd and Zn or their mixture; C= one or more of Ce, Cr, Al, Sb, P, Ge, La, Sn, V and W or their mixture; D= one or more of Ca, Sr, Ba or their mixture; a=0.01-1.0; b and e=1.0-10; c, d, and f=0.1-5.0; and x is a number determined by the valence requirements of the other elements present. COPYRIGHT: (C)2008,JPO&INPIT
Abstract translation:待解决的问题:为了额外地增加氰化氢副产物的产生,而不会显着降低腈的产率。 解决方案:一种催化剂组合物,其包含铁,铋,钼和钙的催化氧化物的络合物,其特征在于以下经验式:A a SB> B b> SB> C SB>ðð SB>铁电子 SB>双˚F SB>沫 12 SB> 0 X SB>其中A = Li,Na,K,Rb和Cs中的一种或多种或它们的混合物; B = Mg,Mn,Ni,Co,Ag,Pb,Re,Cd和Zn中的一种或多种或它们的混合物; C = Ce,Cr,Al,Sb,P,Ge,La,Sn,V和W中的一种或多种或它们的混合物; D = Ca,Sr,Ba或它们的混合物中的一种或多种; A = 0.01-1.0; b和e = 1.0-10; c,d和f = 0.1-5.0; x是由其他元素的化合价要求确定的数。 版权所有(C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a production process of acrylonitrile or methacrylonitrile, which offers an excellent production rate and an excellent quality of the obtained product without increasing the size of a column used in recovery and purification sections. SOLUTION: The process is for the recovery of acrylonitrile or methacrylonitrile obtained from a reactor effluent of an ammoxidation reaction of propylene or isobutylene. The process comprises a step of passing the reactor effluent through an absorber column, a first decanter, a recovery column, a second decanter and a stripper column. The process is improved by maintaining the inside temperature of the first and second decanters at between about 32 to about 75°F. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
A process for the enhanced recovery and oepration of hydrogen cyanide (HCN)/ heads column obtained form the reactor effluent of an ammoxidation reaction of propane, propylene or isobutylene by reducing the polymer formation above the feed tray in the heads tower.