Catalyst regeneration processes that include measures for controlling emissions generated during the regeneration are described. The present invention further relates to catalytic processes for producing various chlorinated aromatic compounds that include provisions for controlling emissions during catalyst regeneration.

Provided is a beta zeolite also having exceptional catalytic activity as a catalyst other than an olefin epoxidation catalyst. This beta zeolite is synthesized without using an organic structure-directing agent and has titanium in the structural skeleton thereof, the Ti content being 0.10 mmol/g or higher. This beta zeolite preferably has an Si/Ti molar ratio of 20-200. Also, the Si/Al molar ratio is preferably 100 or higher.

Provided is a beta zeolite also having exceptional catalytic activity as a catalyst other than an olefin epoxidation catalyst. This beta zeolite is synthesized without using an organic structure-directing agent and has titanium in the structural skeleton thereof, the Ti content being 0.10 mmol/g or higher. This beta zeolite preferably has an Si/Ti molar ratio of 20-200. Also, the Si/Al molar ratio is preferably 100 or higher.

Provided is a composition containing a polyphenol compound (B) and a solvent, in which the polyphenol compound (B) is at least one selected from a compound represented by the following formula (1) and a resin having a structure represented by the following formula (2):

##STR00001##

wherein R.sup.Y, R.sup.T, X, m, N, r, and L are as described in the description.

Provided is a composition containing a polyphenol compound (B) and a solvent, in which the polyphenol compound (B) is at least one selected from a compound represented by the following formula (1) and a resin having a structure represented by the following formula (2):

##STR00001##

wherein R.sup.Y, R.sup.T, X, m, N, r, and L are as described in the description.

Catalyst regeneration processes that include measures for controlling emissions generated during the regeneration are described. The present invention further relates to catalytic processes for producing various chlorinated aromatic compounds that include provisions for controlling emissions during catalyst regeneration.

Catalyst regeneration processes that include measures for controlling emissions generated during the regeneration are described. The present invention further relates to catalytic processes for producing various chlorinated aromatic compounds that include provisions for controlling emissions during catalyst regeneration.

Catalyst regeneration processes that include measures for controlling emissions generated during the regeneration are described. The present invention further relates to catalytic processes for producing various chlorinated aromatic compounds that include provisions for controlling emissions during catalyst regeneration.

There are provided a method for manufacturing a modified aluminosilicate by which a hydroquinone is highly selectively manufactured by reaction of a phenol with hydrogen peroxide, a modified aluminosilicate, and a method for manufacturing an aromatic dihydroxy compound by using the modified aluminosilicate, under industrially advantageous conditions. The method for manufacturing a modified aluminosilicate of the present invention includes a first step of treating an aluminosilicate with an acid, a second step of primarily calcining the treated material obtained in the first step at 550° C. to 850° C., and a third step of contacting the calcined material obtained in the second step with a liquid. containing one or more elements selected from the group consisting of Group 4 elements and. Group 5 elements on. the periodic table, and then drying and secondarily calcining the resultant. The modified aluminosilicate included in the present invention. includes one or more elements selected from the group consisting of Group 4 elements and Group 5 elements on the periodic table, and exhibits an absorbance at 300 nm (A[300]) in an ultraviolet visible spectrum of 1.0 or higher. The method for manufacturing aromatic dihydroxy compounds of the present invention includes a step of reacting a phenol with hydrogen peroxide in the presence of a specific modified. aluminosilicate.

There are provided a method for manufacturing a modified aluminosilicate by which a hydroquinone is highly selectively manufactured by reaction of a phenol with hydrogen peroxide, a modified aluminosilicate, and a method for manufacturing an aromatic dihydroxy compound by using the modified aluminosilicate, under industrially advantageous conditions. The method for manufacturing a modified aluminosilicate of the present invention includes a first step of treating an aluminosilicate with an acid, a second step of primarily calcining the treated material obtained in the first step at 550° C. to 850° C., and a third step of contacting the calcined material obtained in the second step with a liquid. containing one or more elements selected from the group consisting of Group 4 elements and. Group 5 elements on. the periodic table, and then drying and secondarily calcining the resultant. The modified aluminosilicate included in the present invention. includes one or more elements selected from the group consisting of Group 4 elements and Group 5 elements on the periodic table, and exhibits an absorbance at 300 nm (A[300]) in an ultraviolet visible spectrum of 1.0 or higher. The method for manufacturing aromatic dihydroxy compounds of the present invention includes a step of reacting a phenol with hydrogen peroxide in the presence of a specific modified. aluminosilicate.