The present disclosure discloses a method for co-producing synthetical rutile and polymeric ferric sulfate with waste sulfuric acid, which includes the following steps of: S1, performing deep reduction on ilmenite to obtain reduced ilmenite with a metallization rate of 85% or more; S2, leaching the reduced ilmenite with waste sulfuric acid; S3, performing solid-liquid separation on a mixed solution after the leaching in step S2, and drying a solid to obtain synthetical rutile, wherein a filtrate is a ferrous sulfate solution; and then performing step S4 or S5 to obtain a polymeric ferric sulfate finished product. The waste sulfuric acid is adopted in the present disclosure to leach the reduced ilmenite to prepare the synthetical rutile, a novel waste acid recycling mode is formed

A catalyst including a modified silica support having a titanium modifier metal, and a catalytic metal on the modified silica support. A proportion of the modifier metal is present in the form of mononuclear titanium moieties or is derived from a mononuclear titanium cation source at the commencement of modification. The invention also discloses a corresponding modified silica support, a method of producing the catalyst or the modified silica support, and a process for preparing an ethylenically unsaturated acid or ester in the presence of the catalyst.

A method for preparing a compound of formula RSH where R represents an alkyl group, by gas-phase catalytic reaction of hydrogen sulfide with a compound of formula ROH, in the presence of a solid catalyst, according to which method the reaction is performed in the presence of a catalyst which includes one or several pure or mixed rare-earth oxide(s), one or several pure or mixed rare-earth sulfide(s), or one or several pure or mixed rare-earth oxysulfide(s). When the rare earth is lanthanum, the catalyst is a mixed oxide of lanthanum and of at least one metal selected from rare earths or not and when the rare earth is cerium, the catalyst is supported on an alumina.

Provided is a method of producing a porous molded body, the method including: the step of obtaining a molded body by molding a raw material that contains from 1 part by mass to 100 parts by mass of a bicarbonate compound (A) represented by AHCO.sub.3 (wherein, A represents Na or K) and from 0 parts by mass to 99 parts by mass of a compound (B) represented by B.sub.nX (wherein, B represents Na or K; X represents CO.sub.3, SO.sub.4, SiO.sub.3, F, Cl, or Br; and n represents an integer of 1 or 2 as determined by the valence of X) (provided that a total amount of (A) and (B) is 100 parts by mass); and the step of obtaining a porous molded body by performing a heat treatment of the molded body in a temperature range of from 100° C. to 500° C. and an atmosphere that contains water vapor in an amount of from 1.0 g/m.sup.3 to 750,000 g/m.sup.3 and thereby thermally decomposing not less than 90% by mass of the bicarbonate compound (A).

Provided is a method of producing a porous molded body, the method including: the step of obtaining a molded body by molding a raw material that contains from 1 part by mass to 100 parts by mass of a bicarbonate compound (A) represented by AHCO.sub.3 (wherein, A represents Na or K) and from 0 parts by mass to 99 parts by mass of a compound (B) represented by B.sub.nX (wherein, B represents Na or K; X represents CO.sub.3, SO.sub.4, SiO.sub.3, F, Cl, or Br; and n represents an integer of 1 or 2 as determined by the valence of X) (provided that a total amount of (A) and (B) is 100 parts by mass); and the step of obtaining a porous molded body by performing a heat treatment of the molded body in a temperature range of from 100° C. to 500° C. and an atmosphere that contains water vapor in an amount of from 1.0 g/m.sup.3 to 750,000 g/m.sup.3 and thereby thermally decomposing not less than 90% by mass of the bicarbonate compound (A).

A partial oxidative coupling catalyst has a structure in which a component represented by M.sub.2ZrO.sub.3 is supported on a support, where M represents an alkali metal.

The present invention relates to a catalyst-supporting organic-inorganic hybrid composite particle, and more particularly, to a technique of adjusting a desired pot life and curing speed by preparing a catalyst-supporting organic-inorganic hybrid composite particle by adding a catalyst for polyurethane reaction to a catalyst-supporting particle prepared by stirring an alkoxy silane-functionalized polyurethane precursor and the tetraethyl orthosilicate for a certain period of time and mixing them, and adjusting an initiation rate for polyurethane polymerization through the prepared catalyst-supporting organic-inorganic hybrid composite particle.

A method for producing carbon monoxide, the method may comprise the steps of: (a) preparing an adsorption-conversion catalyst comprising a support, and an additive comprising at least one selected from the group consisting of an alkali metal and an alkali earth metal, supported on the support, and not substantially comprising Ni, Fe, Co, Cr, Cu, Ru, In, Rh, Pt, Au, and Pd elements; (b) bringing the adsorption-conversion catalyst into contact with a gas containing carbon dioxide to allow the adsorption-conversion catalyst to capture carbon dioxide; and (c) bringing the adsorption-conversion catalyst to which carbon dioxide is captured into contact with a reducing gas to produce carbon monoxide.

A method for producing carbon monoxide, the method may comprise the steps of: (a) preparing an adsorption-conversion catalyst comprising a support, and an additive comprising at least one selected from the group consisting of an alkali metal and an alkali earth metal, supported on the support, and not substantially comprising Ni, Fe, Co, Cr, Cu, Ru, In, Rh, Pt, Au, and Pd elements; (b) bringing the adsorption-conversion catalyst into contact with a gas containing carbon dioxide to allow the adsorption-conversion catalyst to capture carbon dioxide; and (c) bringing the adsorption-conversion catalyst to which carbon dioxide is captured into contact with a reducing gas to produce carbon monoxide.

A porous formed body (Y) including a porous formed body (X) that satisfies the following (x-1) to (x-3), and an alkali metal carbonate or an alkali metal bicarbonate, in which a content of the alkali metal carbonate or the alkali metal bicarbonate is in a range of from 1 part by mass to 230 parts by mass, with respect to 100 parts by mass of the porous formed body (X), and a production method thereof, an α-olefin dimerization catalyst and a production method thereof, and a method of producing an α-olefin dimer: requirement (x-1): a volume of pores with a pore diameter in a range of from 0.01 μm to 100 μm is from 0.10 mL/g to 1.00 mL/g; requirement (x-2): a median pore diameter of pores with a pore diameter in a range of from 0.01 μm to 100 μm is from more than 0.01 μm to 10.0 μm; and requirement (x-3): a crushing strength is from 0.7 kgf to 15.0 kgf.