Abstract:
The present invention provides the hydrotalcite particles of claim 1 and a process for its preparation. (1) General chemical structure formula
[(Mg) Y (Zn) Z ] 1-X (Al) X (OH) 2 (CO 3 2- ) (x)/2 ·nH 2 O
wherein, x, y, z, and n are values which satisfy the following expressions: 0.2 ≤ x 0.4, y + z = 1, 0.7 ≤ y ≤ 1, 0 ≤ z ≤ 0.3, and n is a value of 0 ≤ n 1 and n is a value of 0≤n (2) Hydrotalcite particles have the average primary particle diameter of 150 to 250 nm. (3) Hydrotalcite particles have the average secondary particle diameter, d 50 , 1 to 2.5µm. (4) Hydrotalcite particles have a specific surface area measured by BET method of 5 to 40 m 2 /g (5) Hydrotalcite particles have an X-ray diffraction pattern in which the first peak (2θ) at a distance of the lower plate layer to the upper plate layer is 11.4 to 11.7 °, the second peak (2θ) at a distance of the interlayer material to the plate layer is 23 to 24 °, and the ratio of the distance of height of the first peak to that of the second peak is 2.10 to 2.65.
Abstract:
A process for producing a metal oxide powder, wherein a) a stream I comprising at least one hydrolysable metal compound in vapour form, b) a stream II comprising oxygen and c) a stream III comprising at least one combustion gas are reacted, with d) stream I being introduced into stream II or vice versa to produce stream IV via a feed point provided in a pipe section A comprising one or more static mixing elements, followed by e) stream III being introduced into stream IV to produce stream V via a feed point provided in a pipe section B comprising one or more static mixing elements, f) the stream V leaving the pipe section B being introduced into a reaction chamber, where it is ignited and reacted in a flame, with g) the resulting solid being isolated.
Abstract:
A method of removing dissolved metal contaminants from aqueous and/or organic liquids by contacting the liquids with ethylene polymer having pendent carboxylic acid groups or pendent carboxylic acid groups in the salt form which polymer is in microporous, fibrous or particulate form for a time sufficient to cause metal ions to affix to the polymer and thereafter separate the liquid from the polymer.
Abstract:
The invention concerns the plugging of underground formations. The plugging agent used is aluminum hydroxychloride with hexamethylene tetramine, or a weak-base activator such as urea. The invention has applicants in the treatment of oil wells and the traversed formations.
Abstract:
The present invention relates to a metal alkoxide solution comprising metal alkyl carbonate groups. The solution are represented by the general formula M X [OR 1 ] Y [OOCOR 2 ] Z in which M X denotes at least one metal from the group M(I) A , M(II) B , M(III) C , M(IV) D, M(V) E , M(VI) F , M(VII) G which means the metals are selected from the group monovalent metal, divalent metal, trivalent metal, metal of higher valency such as tetravalent metal, pentavalent metal, hexavalent metal, heptavalent metal. It is preferred that M X denotes at least one metal from the group M(I) A , M(II) B , M(III) C , M(IV) D , even more preferably Mx denotes at least one metal from the group M(I) A , M(II) B , M(III) C . The term [OOCO] denotes a carbonate group and R 1 , R 2 denote alkyl groups with C1 - C60 carbon atoms, more preferably C1 - C20 carbon atoms, with X = A+B+C+D+E+F+G and Y + Z = A+2*B+3*C+4*D+5*E+6*F+7*G, whereby the solution is water free. in case that the metal species only contains a monovalent metal then the solution is formed by metal alkoxide and metal alkyl carbonate whereby the molar amount of metal alkyl carbonate, to molar amount of metal alkoxide ≥ 1 : 1, preferably ≥ 5 : 1, more preferably ≥ 10 : 1, even more preferably ≥ 50 : 1.
Abstract translation:本发明涉及包含金属烷基碳酸酯基团的金属醇盐溶液。 该溶液由通式MX [OR 1] Y [OOCOR 2] Z表示,其中MX表示至少一种选自M(I)A,M(II)B,M(III)C,M(IV) D,M(V)E,M(VI)F,M(VII)G表示金属选自一价金属,二价金属,三价金属,高价金属如四价金属,五价金属,六价 金属,七价金属。 MX优选表示至少一种选自M(I)A,M(II)B,M(III)C,M(IV)D的金属,甚至更优选Mx表示至少一种选自M (I)A,M(II)B,M(III)C。 术语[OOCO]表示碳酸酯基团,并且R 1,R 2表示具有C 1 -C 60碳原子,更优选C 1 -C 20碳原子的烷基,X = A + B + C + D + E + F + G且Y + Z = A + 2 * B + 3 * C + 4 * D + 5 * E + 6 * F + 7 * G,由此该溶液是无水的。 在金属物质仅包含一价金属的情况下,则溶液由金属醇盐和烷基碳酸金属盐形成,由此金属烷基碳酸酯的摩尔量相对于金属醇盐的摩尔量≥1:1,优选≥5:1更多 优选≥10:1,甚至更优选≥50:1。
Abstract:
This patent describes an economical and environment-friendly continuous process for the synthesis of anionic clays with carbonate and/or hydroxide anions as the charge-balancing interlayer species. It involves reacting a slurry comprising aluminium trihydrate and/or its calcined form, with a magnesium source. There is no necessity to wash or filter the product. It can be spray dried directly to form microspheres or can be extruded to form shaped bodies. The product can be combined with other ingredients in the manufacture of catalysts, absorbents, pharmaceuticals, cosmetics, detergents, and other commodity products.