摘要:
A mordenite type zeolite having a high purity and a high SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio is prepared without using an organic or inorganic mineralizer, by a process wherein a homogeneous aluminosilicate containing 3 to 14% by weight, expressed in terms of Al.sub.2 O.sub.3 (calculated as the anhydride), of aluminum is crystallized in an aqueous solution of an alkali metal hydroxide.
摘要翻译:通过以下方法制备具有高纯度和高SiO 2 / Al 2 O 3摩尔比的丝光沸石型沸石,其不含有机或无机矿化剂,其中以Al2O3表示的含有3至14重量%的均匀的硅铝酸盐(按照 酸酐)在碱金属氢氧化物的水溶液中结晶。
摘要:
A faujasite zeolite of a high purity and a desired silica/alumina ratio is prepared by crystallizing at an elevated temperature a reaction mixture comprising a silica source, an alumina source, and an alkali metal source, wherein a transparent faujasite germ solution obtained by mixing and aging aqueous alkali metal silicate solution, an aqueous alkali metal aluminate solution and an aqueous alkali metal hydroxide solution is made present in the reaction mixture. The faujasite germ solution has an oxide molar composition represented by the following molar ratios:SiO.sub.2 /Al.sub.2 O.sub.3 =8 to 14,M.sub.2 O/Al.sub.2 O.sub.3 =7 to 30,andH.sub.2 O/M.sub.2 O=10 to 14,wherein M represents an alkali metal.The amount of the faujasite germ solution is 1 to 30 wt. % as Al.sub.2 O.sub.3 based on the faujasite zeolite.
摘要翻译:通过在高温下结晶包含二氧化硅源,氧化铝源和碱金属源的反应混合物来制备高纯度和所需二氧化硅/氧化铝比的八面沸石沸石,其中通过混合获得的透明八面沸石细菌溶液 老化碱金属硅酸盐水溶液,碱金属铝酸盐水溶液和碱金属氢氧化物水溶液存在于反应混合物中。 八面沸石细菌溶液具有由以下摩尔比表示的氧化物摩尔组成:SiO 2 / Al 2 O 3 = 8〜14,M 2 O / Al 2 O 3 = 7〜30,H 2 O / M 2 O = 10〜14,其中,M表示碱金属。 八面沸石菌溶液的量为1〜30重量% %为基于八面沸石的Al 2 O 3。
摘要:
A faujasite type zeolite having a high SiO.sub.2 /Al.sub.2 O.sub.3 ratio is prepared by simultaneously and continuously supplying an aqueous solution of an alkali metal silicate and an aqueous solution of an aluminum-containing compound whereby the alkali metal silicate is continuously reacted with the aluminum-containing compound to prepare a homogeneous phase compound of a granular amorphous aluminosilicate containing aluminum in an amount of 10 to 16% by weight, as Al.sub.2 O.sub.3 and based on the anhydride; and then, crystallizing the granular homogeneous phase amorphous aluminosilicate in an aqueous alkali metal hydroxide solution having a concentration of 4 to 10% by weight.
摘要翻译:通过同时且连续地供给碱金属硅酸盐的水溶液和含铝化合物的水溶液来制备具有高SiO 2 / Al 2 O 3比率的八面沸石型沸石,由此使碱金属硅酸盐与含铝化合物连续反应 制备含有10〜16重量%铝的粒状无定形硅铝酸盐作为Al 2 O 3并基于该酸酐的均相化合物; 然后在浓度为4〜10重量%的碱金属氢氧化物水溶液中使粒状均匀相状态的硅铝酸盐结晶。
摘要:
A zeolite similar to ZSM-5, having lattice spacings (d-values), shown in Table 1, of the X-ray powder diffraction pattern, and a ferrierite zeolite are prepared by crystallizing a homogeneous phase compound of a granular amorphous aluminosilicate in water or in an aqueous solution of an alkali metal hydroxide and/or an alkali metal silicate.
摘要:
A ferrierite type zeolite having a high purity and a high SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio is prepared by reacting simultaneously and continuously an aqueous sodium and/or potassium silicate solution with an aluminum-containing solution to obtain a homogeneous phase compound of a granular amorphous aluminosilicate containing Al in an amount of 3 to 14 wt. % as calculated as anhydrous Al.sub.2 O.sub.3 and Na and/or K in an amount of 1 to 17 wt. % as calculated as anhydrous Na.sub.2 O and/or K.sub.2 O; and then, crystallizing the homogeneous phase compound in the form of a slurry in water or in an aqueous sodium hydroxide and/or potassium hydroxide solution. The molar ratio of K.sup.+ to the total of (K.sup.+ +Na.sup.+) in the slurry is 0.1 to 0.9.
摘要翻译:通过同时连续地使含硅酸钠和/或硅酸钾水溶液与含铝溶液反应来制备具有高纯度和高SiO 2 / Al 2 O 3摩尔比的镁碱沸石型沸石,以获得含有颗粒状无定形硅铝酸盐的均相化合物, Al量为3〜14wt。 %,以无水Al 2 O 3计,Na和/或K为1〜17重量%。 %,以无水Na 2 O和/或K 2 O计算; 然后将浆状物形式的均相化合物在水中或氢氧化钠水溶液和/或氢氧化钾溶液中结晶。 浆料中K +与(K ++ N +)的总摩尔比为0.1〜0.9。
摘要:
An L type zeolite of a high purity is prepared by crystallizing an amorphous sodium alminosilicate compound containing a silicon component in an amount of 67 to 91 wt. % as SiO.sub.2 on the anhydrous basis in an aqueous potassium hydroxide solution.
摘要:
Disclosed is a zeolite having a composition of the following formula: xM.sub.2/n O.Al.sub.2 O.sub.3.(5-10)SiO.sub.2.yH.sub.2 O wherein M is at least one cation having a valency of n, and x is 0.8-2 and y is 0-10, and exhibiting an X-ray powder diffraction pattern shown in Table 1. This zeolite is prepared by a process wherein a reaction mixture comprising a silica source, an alumina source, an alkali source, a potassium source and water and having a composition satisfying the following molar ratios: SiO.sub.2 /Al.sub.2 O.sub.3 =6-40, OH/SiO.sub.2 =0.3-1, K.sub.2 O/M.sub.2 O=0.1-0.9 (M: the total of alkali metals), and H.sub.2 O/SiO.sub.2 =10-70, is crystallized at 120.degree. to 200.degree. C. with stirring. The zeolite is also prepared by a process wherein a granular amorphous aluminosilicate containing aluminum in an amount of 4 to 22 wt. % as Al.sub.2 O.sub.3 (on the anhydrous base), which is obtained by reacting an aqueous alkali metal silicate solution with an aqueous aluminum-containing solution, is incorporated in an aqueous alkali metal hydroxide solution and/or an aqueous alkali metal silicate solution, to form a mixture having a composition defined by the above-mentioned molar ratios, and the mixture is crystallized with stirring.
摘要翻译:公开了具有下式的组成的沸石:xM2 / nO.Al2O3。(5-10)SiO2.yH2O其中M是至少一个化合价为n的阳离子,x为0.8-2,y为0- 并表现出如表1所示的X射线粉末衍射图。该沸石是通过以下方法制备的,其中包括二氧化硅源,氧化铝源,碱源,钾源和水的反应混合物,其组成满足 以下摩尔比:SiO 2 / Al 2 O 3 = 6-40,OH / SiO 2 = 0.3-1,K 2 O / M 2 O = 0.1-0.9(M:碱金属的总量)和H 2 O / SiO 2 = 10-70, 120〜200℃搅拌。 沸石也可以通过以下方法制备:其中含有4〜22重量%的铝的粒状无定形硅铝酸盐 通过使碱金属硅酸盐水溶液与含水铝水溶液反应而获得的Al 2 O 3(在无水基底上)加入碱金属氢氧化物水溶液和/或碱金属硅酸盐水溶液中形成 具有由上述摩尔比定义的组成的混合物,并将混合物在搅拌下结晶。
摘要:
A finely divided zeolite powder of high flowability is provided. This zeolite powder is represented by the formula: Na.sub.2 O.Al.sub.2 O.sub.3.nSiO.sub.2.wH.sub.2 O (n=1.8.about.3.0 and w=1.about.6) and comprises at least 99 weight % of particles having a particle size of 1-5 microns and has an aerated bulk density of from 0.3 to about 0.5 g/cc, a degree of cohesiveness of not larger than 56%, and a general flow index (expressed as the sum of indexes of the repose angle, spatula angle, compressibility and degree of cohesiveness) of from 30 to about 50. The zeolite powder is prepared by adding an alkali metal aluminate to an aqueous zeolite slurry containing 3052 wt. % of zeolite (an anhydride) and having pH of not higher than 12.8; adjusting the pH of the slurry to a value not higher than 11; and then, drying the slurry. The zeolite powder is useful as a builder for detergent.
摘要:
Titanium carbonitride of a high purity and in a fine powder form can be produced by maintaining a mixture of titanium halide and carbon at a temperature of from 700.degree. C. to 1,800.degree. C. in the presence of a reducing substance, such as aluminum or an aluminum-titanium alloy, in a nitrogen-containing gaseous atmosphere.
摘要:
Chain structured corpuscular calcium carbonate is produced by a carbonation of calcium hydroxide suspended in water in the presence of a chelating agent and a water soluble metal salt.