78 results about "Polychlorinated Dibenzo-p-dioxins" patented technology

Disclosed is a vanadium / titania-based catalyst including natural manganese ore for removing nitrogen oxides and dioxin in a wide operating temperature range and a method of using the same. Specifically, this invention pertains to a vanadium / titania (V / TiO2)-based catalyst, including natural manganese ore, and a method for removing nitrogen oxides and dioxin over a wide operating temperature range, in which the WTiO2 catalyst for selective catalytic reduction of nitrogen oxides and removal of dioxin contained in flue gas includes 5-30 wt % of natural manganese ore.

The invention provides an adding method and a device of an inhibitor used for reducing generation of dioxin in sintering process. According to the adding method, two stage mixing is adopted for adding of the inhibitor. The adding method comprises following steps: first stage mixing is carried out, wherein an inhibitor solution is delivered into a solution conveying system, conveying amount is controlled by a flow amount control device, and the inhibitor solution is uniformly mixed in a sintered pellet system or a coke blending system; another time of mixing is carried out, wherein the sintered pellets mixed with the inhibitor solution or coke powder mixed with the inhibitor solution and a sinter mixture are delivered into a sintering material mixer for another time of mixing; and at last an obtained sintering material is delivered into a sintering machine for sintering. Fine control on the inhibitor used for reducing generation of dioxin is carried out, and adding amount of the inhibitor solution is controlled to range from 0.005 to 0.01%, so that generation of dioxin is reduced, and at the same time unfavorable influences on sintered ore quality and sintering equipment caused by excessive adding of urea are avoided.

The present invention relates to a compound of the general formula (I) wherein Het is an optionally substituted 4-, 5-, 6- or 7-membered heterocyclic ring having at least one nitrogen atom; R1 is hydrogen, hydroxy, C1-C4 alkyl, C3-C4 cycloalkyl, C2-C4 alkenyl or C2-C4 alkynyl; R2 and R3 is each and independently selected from hydrogen, C1-C4 alkyl, C3-C4 cycloalkyl, C2-C4 alkenyl, C2-C4 alkynyl, C1-C4 alkoxy, halogen and cyano, provided that R2 and R3 may not both be hydrogen; R4 is C1-C4 alkyl, C3-C4 cycloalkyl, C2-C4 alkenyl or C2-C4 alkynyl; Ar is an optionally substituted aromatic ring system selected from pyridinyl; 1-naphthyl; 5,6,7,8-tetrahydro-1-naphthyl; quinolinyl; 2,3-dihydro-1,4-benzodioxinyl; 1,3-benzodioxolyl; 5,6,7,8-tetrahydroquinolinyl; 5,6,7,8-tetrahydroisoquinolinyl; 5,6,7,8-tetrahydroquinazolin-4-yl; 1-benzo[b]thiophen-7-yl; 1-benzo[b]thiophen-4-yl; 1-benzo[b]thiophen-3-yl; isoquinolinyl; quinazolinyl; and indan-4-yl; or Ar is substituted phenyl; or an enantiomer thereof or any salt thereof; to a pharmaceutical composition containing said compounds and to the use of said compounds in therapy. The present invention further relates to processes for the preparation of compounds of formula I and to new intermediates used in the preparation thereof.

Provided is an unbleached paper product made from grass type pulp, the unbleached paper product has a brightness of 35-60% ISO, the grass type pulp is unbleached. The unbleached paper product includes an unbleached toilet paper, an unbleached hand towel, an unbleached wiping paper, an unbleached duplicating paper, an unbleached meal container, an unbleached food wrapping paper and an unbleached printing paper. The paper products have a high intensity and have no detection of dioxin and absorbable organic halides in the harmful substance detection test.