摘要:
A process for reducing sulfur content in a gaseous stream with the production of elemental sulfur by first treating the gaseous steam with hydrogenation and hydrolysis to convert substantially all of the sulfur components therein to hydrogen sulfide. Then reducing the water content of the gaseous stream to optimize chemical equilibrium. Thereafter, the gaseous steam is contacted in an oxidation reactor with an acid catalyst at a temperature of about 150.degree. C. to about 350.degree. C. to convert hydrogen sulfide to elemental sulfur. The product gas leaving the oxidation reactor is cooled to separate elemental sulfur by condensation. The acid catalyst is a shape selective zeolite, a metal-exchanged or impregnated alumina, or a mixture thereof. The alumina is gamma phase alumina impregnated with from about 0.2 wt % to about 2.0 wt % metal.
摘要:
Alkylation of aromatics, e.g. ethylbenzene preparation, with minimized o-xylene make by contacting with olefin alkylating agent in the presence of ZSM-5 crystals having a diffusion rate constant of at least about 100 sec.sup.-1 .times.10.sup.-6 and an alpha value of less than about 100 prepared from a non-organic forming mixture comprising a silica source of precipitated silica having a particle size of 1 to 500 microns.
摘要:
Short-chain alkyl phenols are prepared by reacting an alkylatable phenolic compound with an alkylating agent having one or more available alkylating aliphatic groups of from one to five carbon atoms. The reaction is carried out under alkylation conditions with a zeolite catalyst characterized by x-ray diffraction values as set forth in Tables A to D, infra.
摘要:
This invention relates to use of a new improved form of crystalline silicate identified as zeolite ZSM-11 as a catalyst component for organic compound, e.g. hydrocarbon compound, conversion.
摘要:
The invention relates to the use of particulate silicone resins in the absence of added organic solvents with particulate inorganic materials to form structured bodies and in particular molecular sieve containing structured bodies. The silicone resin is used in the form of a particulate with an average particle size of less than 700 um. Upon calcining, the silicone resin is converted to silica which acts as a binder.
摘要:
The catalyst becomes at least partially deactivated by sorbing catalyst poisons present in the feed during a process for alkylating aromatics by contacting a feed containing benzene, toluene, xylenes, alkylbenzenes, naphthalene or substituted naphthalenes under liquid phase alkylating conditions with C2-C16 olefins in the presence of MCM-22, MCM-36, MCM-49, MCM-56, ZSM-5, ZSM-11, ZSM-12, ZSM-23, ZSM-35, ZSM-48, ZSM-50, ZSM-4, ZSM-18, ZSM-20, Zeolite X, Zeolite Y, USY, mordenite or offretite to provide an alkylated aromatic product. The at least partially deactivated catalyst can be treated in situ by contacting with at least one polar compound having a dipole moment of at least 0.05 Debyes and selected from the group consisting of acetic acid, formic acid, water, and carbon monoxide, under conditions of temperature and pressure employed in the liquid phase alkylating conditions which are sufficient to at least partially desorb the catalyst poison from the catalyst.
摘要翻译:在芳族化合物的烷基化方法中,通过在液相烷基化条件下将含有苯,甲苯,二甲苯,烷基苯,萘或取代萘的进料与C 2 H 2化合物接触,使催化剂至少部分失活, 在MCM-22,MCM-36,MCM-49,MCM-56,ZSM-5,ZSM-11,ZSM-12,ZSM-23等的存在下, ZSM-35,ZSM-48,ZSM-50,ZSM-4,ZSM-18,ZSM-20,沸石X,沸石Y,USY,丝光沸石或黑斑,提供烷基化芳族产物。 所述至少部分失活的催化剂可以通过与至少一种偶极矩至少为0.05德拜的极性化合物接触而原位处理,并选自乙酸,甲酸,水和一氧化碳,条件是 在液相烷基化条件下使用的足以使催化剂毒物至少部分解吸的催化剂的温度和压力。
摘要:
A process for producing zeolites in a matrix material is described which comprises precipitating an oxide of silicon in the matrix to increase the silica of the matrix which is available for crystallization to a zeolite.
摘要:
A method for synthesizing an ultra-large pore crystalline material which can be used as a sorbent or catalyst component for conversion of organic and inorganic compound is improved through the addition of a strong acid to the reaction mixture.
摘要:
Relatively short chain alkyl aromatic compounds are prepared by alkylating an alkylatable aromatic compound with a relatively short chain alkylating agent under alkylation reaction conditions in the presence of catalyst comprising a synthetic porous crystalline material characterized by an X-ray diffraction pattern including interplanar d-spacings at 12.36.+-.0.4, 11.03.+-.0.2, 8.83.+-.0.14, 6.18.+-.0.12, 6.00.+-.0.10, 4.06.+-.0.07, 3.91.+-.0.07 and 3.42.+-.0.06 Angstroms.
摘要:
Long chain alkyl phenols are prepared by alkylating an alkylatable phenolic compound with a long chain alkylating agent under alkylation reaction conditions in the presence of catalyst comprising a synthetic porous crystalline material characterized by an X-ray diffraction pattern including interplanar d-spacings at 12.36.+-.0.4, 11.03.+-.0.2, 8.83.+-.0.14, 6.18.+-.0.12, 6.00.+-.0.10, 4.06.+-.0.07; 3.91.+-.0.07 and 3.42.+-.0.06 Angstroms.