Abstract: A stripper and a stripping process for removing the flue gas carried by regenerated catalyst. A cylindrical stripper mainly comprises a degassing pipe at the longitudinal axis, a horizontal pipe connected with the lower end of the degassing pipe, several sets of inner annular baffles and outer annular baffles arranged in alternative arrangement along the vertical direction. Inner annular baffles are fixed on the degassing pipe, outer annular baffles are fixed on the inner wall of the cylinder. The degassing pipe has holes below each set of the inner annular baffles. The regenerated catalyst enters the stripper from the upper part, comes into a countercurrent and crosscurrent contact with steam from the annular steam conduit, and the stripped regenerated catalyst leaves the stripper from the bottom.

Abstract: Pillared clay catalysts for converting heavy oil or residual feedstock into maximum ethylene, propylene and butylene products comprises 30-75 wt % special pillared clays prepared by aluminum pillaring agents of high alkaline degree, 10-40 wt % inorganic oxide bonding agents, 0-30 wt % ZRP series high silicon zeolites with pentasil structure or Y-type zeolites, 0-10 wt % modified compositions of Mg, Al, K, P, Sn and polyethylene gycol, or 0-50 wt % Kaolinite matrix. The catalysts are prepared by mixing slurries, spray drying to form microspheric shapes, pillaring reaction and adding modified components. The catalysts have high catalytic activities, good light olefin selectivities and attrition resistance index.

Abstract: The present invention relates to a titanium-silicalite (TS-1) molecular sieve and the method for preparation of the same, wherein each crystallite of said titanium-silicalite molecular sieve has a hollow cavity with a radial length of 5-300 nm. The benzene adsorption capacity of the molecular sieve determined at 25° C. and P/P0=0.10 for 1 hour is at least 70 mg/g; and the method for preparation of said molecular sieve comprises an acid-treatment and then an organic-base treatment of the synthesized TS-1 molecular sieve, or only an organic-base treatment. The TS-1 molecular sieve of the present invention has a relatively high reactivity and activity stability in the catalytic oxidation.

Abstract: Disclosed is a series of the water-insoluble polymeric quaternary phosphonium salt-type bactericides, which consists of as active bactericidal components an amino quaternary phosphonium salt, a quaternary ammonium group-containing quaternary phosphonium salt, an amino quaternary phosphonium salt-quaternay ammonium salt, or a quaternary ammonium salt-containing quaternary phosphonium salt and quaternary ammonium salt carried on a resin carrier which can be chloromethylated. Said bactericide series has rapid and highly effective bactericidal activity, and can be used repeatedly, and used widely for sterilizing and disinfecting various fluid media such as different industrial and domestic water and the like.

Abstract: A catalytic pyrolysis process for production of ethylene and propylene from heavy hydrocarbons, comprises that heavy hydrocarbons are contacted with a pillared interlayered clay molecular sieve and/or phosphorus and aluminum or magnesium or calcium modified high silica zeolite having a structure of pentasil contained catalysts in a riser or downflow transfer line reactor in the presence of steam and catalytically pyrolysed at a temperature of 650° C. to 750° C. and a pressure of 0.15 to 0.4 MPa for a contact time of 0.2 to 5 seconds, a weight ratio of catalyst to feedstock of 15:1 to 40:1 and a weight ratio of steam to feedstock of 0.3:1 to 1:1. The yields of ethylene and propylene by the present invention are over 18 wt %.

Abstract: A molecular sieve containing composition, which can be applied in catalytic cracking reaction for producing more ethylene and propylene, and its preparation method. The composition contains a pentasil-type molecular sieve having a SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio of 15-60, prepared by activation and modification with phosphorus, alkaline earth metal and transition metal. The composition essentially includes 85.about.98% wt of pentasil-type molecular sieve, 1.about.10% wt of P.sub.2 O.sub.5, 0.3.about.5% wt of alkaline earth oxide, and 0.3.about.5% wt of transition metal oxide. The molecular sieve structure and active centers have high thermal and hydrothermal stability. The salient feature of this composition is that when applied as an active component of cracking catalyst for catalytic pyrolysis process, the yield of ethylene is above 18% and the total yield of ethylene and propylene is more than 40%.