Abstract:
PROCEDIMIENTO Y DISPOSITIVO PARA LA RECUPERACIÓN DE MINERALES NO MAGNÉTICOS A PARTIR DE UNA PULPA (P) CON PARTÍCULAS DE MINERAL NO MAGNÉTICO CON UN CONTENIDO DE SÓLIDOS DE POR LO MENOS 30 POR CIENTO DE SU MASA, EN QUE LA PULPA (P) CIRCULA POR UN REACTOR (1) EN LA DIRECCIÓN DEL FLUJO (100), EN PARTICULAR DE MANERA CONTINUA (100), EN QUE A LA PULPA (P) SE LE ADICIONAN PARTÍCULAS MAGNÉTICAS O MAGNETIZADAS (103), QUE FORMAN AGLOMERADOS CON LAS PARTÍCULAS DE MINERAL NO MAGNÉTICO, EN QUE LOS AGLOMERADOS DE MINERAL Y PARTÍCULAS MAGNÉTICAS SE TRASLADAN A UN ÁREA DE ACUMULACIÓN (4) DEL REACTOR (1) POR MEDIO DE UN CAMPO MAGNÉTICO (106), Y EN QUE LOS AGLOMERADOS DE MINERAL Y PARTÍCULAS MAGNÉTICAS SE DERIVAN DESDE EL ÁREA DE ACUMULACIÓN (4) DEL REACTOR (1) (108, 109), EN QUE LOS AGLOMERADOS DE MINERAL Y PARTÍCULAS MAGNÉTICAS SE SEPARAN EN PARTÍCULAS DE MINERAL NO MAGNÉTICO Y PARTÍCULAS MAGNÉTICAS (110), EN DONDE LAS PARTÍCULAS MAGNÉTICAS SEPARADAS DE LOS AGLOMERADOS DE MINERAL Y PARTÍCULAS MAGNÉTICAS SON TRATADAS (111), ESPECÍFICAMENTE HIDROFOBIZADAS, PARA RESTABLECER SU CAPACIDAD DE INTERACTUAR CON PARTÍCULAS DE MINERAL NO MAGNÉTICAS, FORMANDO NUEVOS AGLOMERADOS DE PARTÍCULAS NO MAGNÉTICAS Y PARTÍCULAS MAGNÉTICAS Y ADEMÁS, AL MENOS EN PARTE, PARA VOLVER A INCORPORARSE A LA PULPA (P).
Abstract:
PROBLEM TO BE SOLVED: To obtain the subject compound at a low temperature, by adding a hydroxyl group-containing compound to an alkyne, etc., in the presence of an amorphous zinc silicate catalyst, etc. SOLUTION: A compound of the formula R OH (R is H, an aliphatic or alicyclic group) is added to an acetylene or allene of formula I or formula II (R is H, an aliphatic or alicyclic group) in a gas phase by using a catalyst containing 1-40 wt.% calculated as oxide of zinc or cadmium-containing X-ray amorphous zinc silicate or cadmium silicate as an active ingredient and obtained by setting a zinc salt or a cadmium salt of an acidic organic compound decomposable at a temperature lower than 400 deg.C on amorphous silicic acid and forming the catalyst at 50-500 deg.C in the presence of hydrogen and a hydroxyl group-containing compound such as a
Abstract:
PROBLEM TO BE SOLVED: To obtain the subject compound at a low temperature, by adding a hydroxyl group-containing compound to an alkyne, etc., in the presence of an amorphous zinc silicate catalyst, etc. SOLUTION: A compound of the formula R OH (R is H, an aliphatic or alicyclic group) is added to an acetylene or allene of formula I or formula II (R is H, an aliphatic or alicyclic group) in a gas phase at
Abstract:
PROBLEM TO BE SOLVED: To safely obtain the subject compound, by adding a hydroxyl group- containing compound to an alkyne, etc., in the presence of a roentgenamorph zinc silicate catalyst, etc. SOLUTION: A compound of the formula R OH (R is H, an aliphatic or alicyclic group) is added to an acetylene or allene of formula I or formula II (R is H, an aliphatic or alicyclic group) in a gas phase by using a catalyst containing a zinc silicate as an active ingredient obtained by precipitation from an aqueous solution comprising a soluble silicon compound and zinc compound to give the objective compound of formula III or formula IV ((m) is 0 or 1). The zinc silicate is X-ray amorphous zinc silicate of the formula Zna Sic Oa+2c-0.5e (OH)e .fH2 O ((e) is a value from 0 to 2a+2c; a/c is 1-3.5 and f/a is 0 to 200) and/or a crystal zinc silicate having a hemimorphite structure of the formula Zn4 Si2 O7 ) (OH)2 .H2 O. Zinc exists in a deficient amount or an excessive amount of 25% in terms of stoichiometric composition.
Abstract:
PROBLEM TO BE SOLVED: To provide a production method of a multi-metal oxide composition. SOLUTION: The multi-metal oxide composition is composed of one kind of elements Mo and V, and at least one kind of elements Te and Sb. From a starting compound required for producing the multi-metal oxide composition of elements contained therein, partial solutions with a partial quantity of the starting compound dissolved respectively, are produced, flows of the partial solutions produced therefrom are combined and mixed, a flow of the obtained mixed solution is decomposed to fine liquid particles to be dried with a hot gas and a solid material obtained at this time is treated at a high temperature. COPYRIGHT: (C)2004,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To obtain an unsaturated ketone which is an intermediate for synthesizing a useful flavor and a natural substance by reacting isopropenyl ether with a ketal of acetone with propene, etc., in the reaction between an allyl alcohol and isopropenyl ether. SOLUTION: An allyl alcohol of formula I (R to R are each H, an alkyl, an alkenyl or the like) or a propargyl alcohol of formula II is reacted with an isopropenyl ether of formula III (R is 1-4C alkyl) with forming a ketal of formula IV to give unsaturated ketones of formula V and formula VI. The isopropenyl ether of the formula III is obtained by reacting the ketal of formula IV with propyne or allylene or its mixture in a vapor phase at a raised temperature in the presence of a heterogeneous catalyst containing silicon or oxygen and zinc or cadmium. The ketal of the formula IV is resupplied for producing the isopropenyl ether of the formula III.
Abstract:
The invention relates to a catalyst for partially oxidizing hydrocarbons in the gas phase, containing a multi-metal oxide of the general formula (I), AgaMObVcMdOe * f H2O (I), wherein M stands for at least one element selected from among Li, Na, K, Rb, Cs, Be, Mg, Ca, Sr, Ba, B, AI, Ga, In, Si, Sn, Pb, P, Sb, Bi, Y, Ti, Zr, Hf, V, Nb, Ta, Cr, W, Mn, Re, Fe, Ru, Os, Co, Rh, Ir, Ni, Pd, Pt, Cu, Au, Zn, Cd, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, and U, a has a value of 0.5 to 1.5, b has a value of 0.5 to 1.5, c has a value of 0.5 to 1.5, a+b+c has the value 3, d has a value of less than 1, e means a number that is determined by the valence and frequency of the elements other than oxygen in the formula (I), f has a value of 0 to 20, which multi-metal oxide exists in a crystal structure, the X-ray powder diffractogram of which is characterized by diffraction reflections at a minimum of 5 lattice distances selected from among d = 4.53, 3.38, 3.32, 3.23, 2.88, 2.57, 2.39, 2.26, 1.83, 1.77 Å (± 0.04 Å).
Abstract translation:一种用于烃的气相部分氧化催化剂包括通式(I)的多金属氧化物,AgaMObVcMdOe * F H 2 O(I)其中M是其中锂,钠,钾,铷,铯,铍,镁,钙的至少一个, 锶,钡,硼,铝,镓,铟,硅,锡,铅,磷,锑,铋,Y,钛,锆,铪,钒,铌,钽,铬,钨,锰,RE,铁,钌, 锇,钴,铑,铱,镍,钯,铂,铜,金,锌,镉,镧,铈,镨,钕,钐,铕,钆,铽,镝,钬,铒,铥,镱,路, U被选择的元素,一个具有0.5至1.5的值; b为0.5〜1.5的值,c具有从0.5至1.5,A + b + C的值 是3,D具有小于1的值,例如确定由其中,F为0至20的值,式(I)中氧以外的元素的化合价和频率定义的一个数,在 的晶体结构存在,其粉末X至少为5,在D的特征在于衍射峰= 4.53,3.38,3.32,3.23,2.88,2.57,2.39,2.26,1, 83,1.77埃(±0.04 A)中的晶面间距。