摘要:
This invention deals with a hydrocarbon conversion process using a crystalline oxysulfide composition. The crystalline oxysulfide composition has a three-dimensional microporous framework structure of at least MO.sub.2, MS.sub.2, and MOS tetrahedral units, having an intracrystalline pore system and an empirical formula expressed in molar ratios:(M.sub.s Al.sub.t P.sub.u Si.sub.v)S.sub.w O.sub.2-wwhere M is at least one metal selected from the group consisting of metals which: 1) can be incorporated into the framework structure of a microporous molecular sieve and 2) form hydrolytically stable sulfides; s, t, u, v and w are the mole fractions of M, Al, P, Si and S respectively. The values of s, t, u and v are chosen such that when t is greater than zero u is greater than zero, s+t+u+v=1 and when s=1, M is only a combination of gallium and germanium.
摘要翻译:本发明涉及使用结晶氧硫化物组合物的烃转化方法。 结晶氧硫化物组合物具有至少具有MO2,MS2和MOS四面体单元的三维微孔骨架结构,具有结晶孔系统和以摩尔比表示的经验式:(MsAltPuSiv)SwO 2 -w,其中M为至少一个 选自以下的金属的金属:1)可以结合到微孔分子筛的骨架结构中,2)形成水解稳定的硫化物; s,t,u,v和w分别是M,Al,P,Si和S的摩尔分数。 选择s,t,u和v的值,使得当t大于零时,u大于零,s + t + u + v = 1,当s = 1时,M只是镓和锗的组合 。
摘要:
This invention relates to a process for separating a mixture of molecular species based on the molecular size (kinetic diameter) or on the degree of polarity of the molecular species using a crystalline composition having a three-dimensional microporous structure of MA.sub.2 units where A is sulfur or selenium and having the empirical formula expressed in molar ratios: xR:MA.sub.2.+-.0.2 :zH.sub.2 O where R represents at least one organic templating agent present in the intracrystalline pore system, x is the moles of R, z is the moles of water and M is germanium or tin. A composition having the empirical formula expressed in molar ratios: xR:M.sub.1-y M'.sub.y A.sub.2.+-.0.2 :zH.sub.2 O, where M' is a metal such as cobalt, zinc, manganese, iron, nickel, copper, cadmium and gallium may also be used in the process.
摘要:
This invention relates to a hydrocarbon conversion process using a crystalline composition having a three-dimensional microporous structure of MA.sub.2 units where A is sulfur or selenium and having the empirical formula expressed in molar ratios: xR:MA.sub.2+0.2 :ZH.sub.2 O where R represents at least one organic templating agent present in the intracrystalline pore system, x is the moles of R, z is the moles of water and M is germanium or tin. This invention also relates to a composition having the empirical formula expressed in molar ratios: XR:M.sub.1-y M.sup.'y A.sub.2+0.2 :ZH.sub.2 O where M' is a metal such as cobalt, zinc, manganese, iron, nickel, cooper, cadmium and gallium.
摘要:
This invention relates to a crystalline composition having a three-dimensional microporous structure of MA.sub.2 units where A is sulfur or selenium and having the empirical formula expressed in molar ratios: xR:MA.sub.2.+-.0.2 :zH.sub.2 O where R represents at least one organic templating agent present in the intracrystalline pore system, x is the moles of R, z is the moles of water and M is germanium or tin. This invention also relates to a composition having the empirical formula expressed in molar ratios: xR:M.sub.1-y M'.sub.y A.sub.2.+-.0.2 :zH.sub.2 O, where M' is a metal such as cobalt, zinc, manganese, iron, nickel, copper, cadmium and gallium. This invention further relates to a method of preparing the crystalline composition.
摘要:
This invention deals with a crystalline oxysulfide composition, a process for preparing the composition, a catalyst using the composition and processes using the composition. The crystalline oxysulfide composition has a three-dimensional microporous framework structure of at least MO.sub.2, MS.sub.2, and MOS tetrahedral units, having an intracrystalline pore system and an empirical formula expressed in molar ratios:(M.sub.s Al.sub.t P.sub.u Si.sub.v)S.sub.w O.sub.2-wwhere M is at least one metal selected from the group consisting of metals which: 1) can be incorporated into the framework structure of a microporous molecular sieve and 2) form hydrolytically stable sulfides; s, t, u, v and w are the mole fractions of M, Al, P, Si and S respectively. The oxysulfide composition is prepared by contacting a molecular sieve having an empirical formula: (M.sub.s Al.sub.t P.sub.u Si.sub.v)O.sub.2 with a sulfur containing compound such as carbonyl sulfide for a time and a temperature sufficient to sulfide a fraction of the metal. The oxysulfide compositions are useful as catalyst in hydrocarbon conversion processes such as cracking.
摘要:
This invention relates to processes for preparing a ceramic article having as its principal crystalline phase a leucite/pollucite solid solution. The process involves the use of a zeolite to form the article. Zeolites which can be used are those that have a SiO.sub.2 /Al.sub.2 O.sub.3 ratio of about 3.5 to about 7.5 such as zeolite Y. The zeolite is exchanged with potassium, rubidium and cesium, then calcined at a temperature of about 900.degree. to about 1100.degree. C. for a time to collapse the zeolite framework and provide an amorphous powder. Next, the amorphous powder is formed into a shaped article and the article is sintered at a temperature of about 1150.degree. to about 1400.degree. C. for a time of about 0.5 to about 12 hours to give a ceramic article whose principal crystalline phase is a leucite/pollucite solid solution, is substantially crack free, has less than 5% porosity, and a coefficient of thermal expansion of about 2.times.10.sup.-6 to about 27.times.10.sup.-60 C.sup.-1. This invention also relates to the leucite/pollucite ceramic article.
摘要翻译:本发明涉及制备具有白云母/琉璃灰固体溶液作为其主要结晶相的陶瓷制品的方法。 该方法涉及使用沸石来形成制品。 可以使用的沸石是具有约3.5至约7.5的SiO 2 / Al 2 O 3比例的沸石,例如沸石Y.沸石与钾,铷和铯交换,然后在约900℃至约1100℃的温度下煅烧 一段时间来坍缩沸石骨架并提供无定形粉末。 接下来,将无定形粉末形成成型制品,并将制品在约1150℃至约1400℃的温度下烧结约0.5至约12小时,得到主要结晶相为 白云母/白矾土固溶体基本上无裂纹,孔隙率小于5%,热膨胀系数约2×10-6至约27×10-60℃-1。 本发明还涉及白云石/琉璃苣陶瓷制品。
摘要:
This invention relates to processes for preparing ceramic articles which are especially suited for electronic applications. The process involves taking a shaped article which has been formed from a magnesium exchanged zeolite powder, the zeolite selected from the group consisting of philipsite, harmotome, gismondine, zeolite B, zeolite ZK-19 and zeolite W, and sintering it at a temperature of about 1,000.degree. C. to 1,350.degree. C. for about 1 to about 6 hours. The magnesium exchanged zeolite has a SiO.sub.2 /Al.sub.2 O.sub.3 ratio of about 2.3 to about 2.8 and a sodium content less than 0.5 weight percent. The ceramic article that is formed has a substantially crystalline cordierite phase and has a density of at least 90% of its theoretical density. A preferred process involves calcining the magnesium exchanged zeolite powder at a temperature of about 600.degree.-800.degree. C. to collapse the zeolite framework and give upon sintering a cordierite ceramic article which is substantially crack free. A preferred magnesium exchanged zeolite is magnesium exchanged zeolite B. This invention also relates to a substantially crack free and crystalline cordierite ceramic article, the cordierite represented by the empirical formula 2.0.+-.0.1 MgO:2 Al.sub. 2 O.sub.3 :5.0.+-.0.2 SiO.sub.2 and has an average grain size of about 10 to about 500 nanometers.
摘要翻译:本发明涉及特别适用于电子应用的陶瓷制品的制备方法。 该方法包括从由镁交换的沸石粉末形成的成型制品,所述沸石选自偏硅石,火焰切割机,吉他松碱,沸石B,沸石ZK-19和沸石W,并在 约1000℃至1350℃约1至约6小时。 镁交换沸石的SiO 2 / Al 2 O 3比例为约2.3至约2.8,钠含量小于0.5重量%。 形成的陶瓷制品具有基本上结晶的堇青石相,并且其密度至少为其理论密度的90%。 优选的方法包括在约600-800℃的温度下煅烧镁交换的沸石粉末以使沸石骨架塌缩,并在烧结基本上无裂纹的堇青石陶瓷制品时给出。 优选的镁交换沸石是镁交换沸石B.本发明还涉及基本上无裂纹和结晶的堇青石陶瓷制品,经验式为2.0 +/- 0.1MgO:2Al 2 O 3:5.0 +/- 0.2 SiO 2表示的堇青石 并且具有约10至约500纳米的平均粒度。
摘要:
This invention relates to a process for preparing a lithium containing ceramic article. The process provides a ceramic article that is substantially crack free and has as its principal crystalline phase a beta-eucryptite phase, a beta-spodumene phase, or a mixture thereof. The process comprises calcining a powder of a lithium-exchanged zeolite up to its collapse temperature for a time sufficient to collapse the zeolite framework and provide an amorphous powder. The amorphous powder is now formed into a shaped article and sintered at a temperature of about 700.degree. to about 1150.degree. C. for a time of about 1 to about 12 hours. The zeolites which can be used are those having a SiO.sub.2 Al.sub.2 O.sub.3 ratio of about 2 to about 8.5 and include zeolite B, zeolite ZK-19, zeolite W, phillipsite, hormotome, gismondine and mixtures thereof and have a sodium content less than about 1 weight percent. It is preferred that the lithium-exchanged zeolite have an average particle size of less than about 10 microns.
摘要翻译:本发明涉及一种制备含锂陶瓷制品的方法。 该方法提供了一种基本上无裂纹的陶瓷制品,其主要结晶相为β-锂辉石相,β-锂辉石相或其混合物。 该方法包括将锂交换的沸石的粉末直到其崩溃温度煅烧足以使沸石骨架塌缩并提供无定形粉末的时间。 无定形粉末现在形成成型制品,并在约700℃至约1150℃的温度下烧结约1至约12小时。 可以使用的沸石是具有约2至约8.5的SiO 2 Al 2 O 3比率的沸石,包括沸石B,沸石ZK-19,沸石W,菲利普斯,激素切割剂,吉他松及其混合物,钠含量低于约1重量% 。 锂交换的沸石优选具有小于约10微米的平均粒度。
摘要:
This invention relates to processes for preparing ceramic articles which are especially suited for electronic applications. The process involves taking a shaped article which has been formed from a magnesium exchanged zeolite powder, the zeolite selected from the group consistig of phillipsite, harmotome, gismondine, zeolite B, zeolite ZK-19 and zeolite W, and sintering it at a temperature of about 1,000.degree. to 1,350.degree. C. for about 1 to about 6 hours. The magnesium exchanged zeolite has a SiO.sub.2 /Al.sub.2 O.sub.3 ratio of about 2.3 to about 2.8 and a sodium content less than 0.5 weight percent. The ceramic article that is formed has a substantially crystalline cordierite phase and has a density of at least 90% of its theoretical density. A preferred process involves calcining the magnesium exchanged zeolite powder at a temperature of about 600.degree.-800.degree. C. to collapse the zeolite framework and give upon sintering a cordierite ceramic article which is substantially crack free. A preferred magnesium exchanged zeolite is magnesium exchanged zeolite B.
摘要翻译:本发明涉及特别适用于电子应用的陶瓷制品的制备方法。 该方法包括从由镁交换的沸石粉末形成的成型制品,选自由金刚石,火焰切割机,吉他松碱,沸石B,沸石ZK-19和沸石W组成的组的沸石,并在 约1000至1350℃约1至约6小时。 镁交换沸石的SiO 2 / Al 2 O 3比例为约2.3至约2.8,钠含量小于0.5重量%。 形成的陶瓷制品具有基本上结晶的堇青石相,并且其密度至少为其理论密度的90%。 优选的方法包括在约600-800℃的温度下煅烧镁交换的沸石粉末以使沸石骨架塌缩,并在烧结基本上无裂纹的堇青石陶瓷制品时给出。 优选的镁交换沸石是镁交换沸石B.
摘要:
This invention relates to processes for preparing ceramic articles. One process involves taking a potassium exchanged zeolite, the zeolite characterized in that it has a SiO.sub.2 /Al.sub.2 O.sub.3 ratio of 3.5 to about 7.5, and calcining it at a temperature of about 900.degree. to about 1100.degree. C. for a time sufficient to collapse the zeolite framework and provide an amorphous powder. Next, the amorphous powder is formed into a shaped article and the article is sintered at a temperature of about 1150.degree. to about 1400.degree. C. for a time of about 0.5 to about 12 hours to give a ceramic article whose principal crystalline phase is tetragonal leucite, is substantially crack free, and has less than 5% porosity. When the zeolite is exchanged with cesium, one obtains a ceramic article whose principal crystalline phase is pollucite, when a rubidium exchanged zeolite is used one obtains a ceramic article whose principal crystalline phase is rubidium leucite, and when a potassium/cesium exchanged zeolite is used one obtains a ceramic article having as its principal crystalline phase a leucite/pollucite solid solution. The addition of pollucite to the leucite article provides a ceramic article whose thermal expansion coefficient can be varied from about 2.times.10.sup.-6 to about 27.times.10.sup.-60 C.sup.-1 as measured over the range 50.degree.-700.degree. C. This invention also relates to this leucite/pollucite ceramic article.
摘要翻译:本发明涉及制备陶瓷制品的方法。 一个方法涉及获得钾交换的沸石,该沸石的特征在于其SiO 2 / Al 2 O 3比为3.5至约7.5,并在约900℃至约1100℃的温度下煅烧足够的时间, 沸石骨架,并提供无定形粉末。 接下来,将无定形粉末形成为成型制品,并将制品在约1150℃至约1400℃的温度下烧结约0.5至约12小时,得到其主晶相为四方晶的陶瓷制品 白云母基本上无裂纹,孔隙率小于5%。 当沸石与铯交换时,得到主要结晶相为铯原子的陶瓷制品,当使用铷交换的沸石时,得到主要结晶相为铷白云母的陶瓷制品,并且当使用钾/铯交换的沸石时 得到具有白云母/琉璃灰固体溶液的陶瓷制品的主要结晶相。 将白矾石添加到白云石制品中提供了陶瓷制品,其热膨胀系数可以在50-700℃下测量的约2×10-6至约27×10-60℃-1变化。本发明还涉及这种白云母 /琉璃陶瓷制品。