Method for producing zeolites
    11.
    发明授权

    公开(公告)号:US4175114A

    公开(公告)日:1979-11-20

    申请号:US841622

    申请日:1977-10-13

    摘要: As synthesized by previous methods, ZSM-5 or ZSM-11 zeolites are crystallized in the presence of substantial amounts of a nitrogen-containing compound. When synthesized in this way, they contain an organic ammonium cation as well as a metal cation such as sodium. To obtain a more active form, the sodium ion must be exchanged out. Such exchange, especially with ZSM-5 and ZSM-11, is difficult unless there is calcination of the zeolite to remove the obstructing organo compounds. By making these zeolites in the presence of (1) seeds of the desired zeolite, (2) mixtures of them with ammonium hydroxide and/or alcohol, (3) the alcohol per se or (4) mixtures of the alcohol with ammonium hydroxide, a product substantially deficient in organic ammonium cation is obtained. These products can be exchanged directly without any calcination.

    Processing heavy reformate feedstock
    16.
    发明授权
    Processing heavy reformate feedstock 失效
    加工重型改性饲料

    公开(公告)号:US4066531A

    公开(公告)日:1978-01-03

    申请号:US616964

    申请日:1975-09-26

    IPC分类号: C10G11/18 C10G11/02

    摘要: Liquid product rich in benzene, toluene and xylene and having a substantially lower mid-boiling point than heavy reformate feedstock or similar feedstock, such as, for example, from pyrolysis gasoline, of a class having an initial boiling point between about 230.degree. F and about 250.degree. F and an end point between about 350.degree. F and about 430.degree. F, and gaseous product rich in light olefins and isoparaffins which is good alkylation plant feed are produced by contacting said heavy reformate feedstock or said similar feedstock with a porous acid-active zeolite catalyst having a fluid activity index of at least about 18 in a fluidized catalyst system absent added hydrogen at a temperature of from about 800.degree. F to about 1200.degree. F, a catalyst/oil (i.e. heavy reformate or similar feedstock) weight ratio of from about 0.5 to about 40 and a catalyst residence time of from about 0.1 second to about 20 seconds.