9 results about "Alkaline earth metal" patented technology

RO membranes using chlorinated water as a feed stream maybe protected from damage by the chlorine with a protective layer including reactive nitrogen which forms chloromines on the surface of the membrane that reduce chlorine penetration. This protective layer also provides substantial anti-fouling capabilities, whether used with a chlorinated or unchlorinated feed stream because the chloramines are anti-bacterial. Although chlorine is lost in use, the anti-fouling layer or coating can be recharged with additional chlorine without damaging the discrimination layer. The anti-fouling layer or coating may be advantageously used with Thin film composite, TFC, membranes for use in forward and reverse osmosis may include nanoparticles, monohydrolyzed and/or di-hydrolyzed TMC, and/or alkaline earth alkaline metal complexes or other additives.

This invention relates to a novel polymerization initiator capable of introducing an active amino proton into a polymerization starting terminal without losing polymerization activity, and a novel modified conjugated diene polymer being excellent in the interaction with a filler and capable of improving a low heat buildup of a rubber composition, and more particularly to a polymerization initiator being a diamine compound in which one amino group is protected with a silylating agent and an active proton of the other amino group is replaced with an alkali metal or an alkaline earth metal, and a modified conjugated diene polymer which can be produced by using such a polymerization initiator and is a homopolymer of a conjugated diene compound or a copolymer of a conjugated diene compound and an aromatic vinyl compound and has a residue derived from a diamine compound at its polymerization starting terminal.

The invention discloses an activated carbon-supported ruthenium-based ammonia synthetic catalyst and a preparation method thereof. The preparation method comprises the steps of with potassium ruthenate K2RuO4 H2O as a metallic ruthenium precursor, liquid ammonia and acetic acid as a stabilizer of ruthenium impregnation liquid, alkaline metal and alkaline-earth salts or bases as aids, and activatedcarbon as a supporter, performing impregnating to obtain the activated carbon-supported ruthenium-based ammonia synthetic catalyst. The activated carbon-supported ruthenium-based ammonia synthetic catalyst prepared herein is free of chlorine ions; active ingredients and the aids are distributed evenly on the catalyst; the prepared catalyst has stable performance, high activity, and good safety ofuse and is suitable for industrial production and application.

The present, invention relates to a process for the production of additives for catalysts for fluid catalytic cracking (FCC) based on zeolite that is selective for light olefins, with the aim of increasing the yields, in FCC units, of liquefied petroleum gas (LPG) and light olefins, of high added value, among others propene and isobutene. This invention provides a method of preparation of catalytic compositions, starting from zeolite modified with phosphate and alkaline-earth metal, that leads to the production of an additive with better performance than the additives, of similar compositions, obtained by other methods of the prior art. The process can be regarded as a development in relation to other processes, as it promotes interaction between the zeolite that is selective for light olefins and its activator, reagent “X”. For this, a separate stage is used during the sequence of stages in the preparation. Moreover, the zeolite does not undergo additional treatments such as filtration, washing or calcination after the treatment with its activator.

This additive can be obtained starting from any commercial zeolite that is selective for light olefins, such as zeolite of type ZSM-5.

The present invention provides a sealing liquid which does not contain a nickel salt but is capable of achieving a sealing performance equivalent to that in cases where a sealing liquid containing a nickel salt is used, and which enables an anodic oxide coating film sealed therewith to exhibit excellent contamination resistance. The present invention provides a sealing liquid for anodic oxide coating films of aluminum alloys, which contains a metal salt, a pH buffering agent and a surfactant, and which is characterized in that the metal salt is at least one salt selected from among alkali metal salts and alkaline earth metal salts.

The invention relates to the technical field of chemical tail gas treatment, and discloses a catalyst and a catalytic oxidation deoxidation method for unsaturated hydrocarbon-containing gas by using the catalyst. The catalyst contains a carrier, and an active component, a first auxiliary agent component and a second auxiliary agent component which are loaded on the carrier, wherein the active component is selected from one or more of oxides of Pt, Pd, Ru, Rh, Ag and Ir; the first auxiliary agent component contains one or more of rare earth metal elements, IVB group metal elements and VIII group metal elements, and the second auxiliary agent component contains one or more of alkali metal elements and alkaline earth metal elements. According to the deoxidation method using the catalyst, reducing gas such as H2 does not need to be added, hydrocarbon and oxygen directly react to generate CO2 and H2O, the purpose of deoxidizing hydrocarbon-containing tail gas is achieved, and carbon deposition can be prevented.

An alkali metal alkoxide or alkaline earth metal alkoxide in granular form.

The invention discloses a cobalt-based Fischer Tropsch synthesis catalyst; the catalyst contains 70%-95%, preferably 85% above by weight of a composite metal oxide, and a metal additive; the composite metal oxide shows a cubic crystal form and has a structure formula of ABO3-y, wherein A is an alkaline earth metal, B is transition metals at least comprising cobalt, the mole content of the cobalt in the transition metals is higher than 75%, preferably higher than 80% , y is the mole number of oxygen vacancies existing in the composite oxide. The catalyst can improve a diesel fraction proportion in a liquid hydrocarbon product and reduce methane selectivity.