43results about "Aluminium halides" patented technology

Carbon black having organic groups, the organic group containing a thiocyanate group. Also described is a process for the production of the carbon black, wherein carbon black is reacted with organic compounds containing a C—C double or triple bond, which is not part of an aromatic system, whose C—C double or triple bond is activated by at least one substituent, and the organic compound contains at least one thiocyanate group. The carbon black according to the invention can be used in rubber compounds.

Disclosed is a clean method for preparing layered double hydroxides (LDHs), in which hydroxides of different metals are used as starting materials for production of LDHs by atom-economical reactions. The atom efficiency of the reaction is 100% in each case because all the atoms of the reactants are converted into the target product since only M2+(OH)2, M3+(OH)3, and CO2 or HnAn− are used, without any NaOH or other materials. Since there is no by-product, filtration or washing process is unnecessary. The consequent reduction in water consumption is also beneficial to the environment.

The present invention provides a lithium-containing composite oxide for a positive electrode for a lithium secondary battery, which has a large volume capacity density and high safety, and excellent durability for charge and discharge cycles and charge and discharge rate property, and its production method.The lithium-containing composite oxide is represented by the general formula LipNxMyOzFa (where N is at least one element selected from the group consisting of Co, Mn and Ni, M is at least one element selected from the group consisting of Al, Sn, alkaline earth metal elements and transition metal elements other than Co, Mn and Ni, 0.9≦p≦1.2, 0.965≦x<2.00, 0<y≦0.035, 1.9≦z≦4.2, and 0≦a≦0.05), wherein when a powder of the lithium-containing composite oxide is classified into small particles with an average particle size of 2 μm≦Ds50≦8 μm and large particles with an average particle size of 10 μm≦Dl50≦25 μm, a content of the small particles is from 15 to 40% by weight and a content of the large particles is from 60 to 85% by weight, and 0.01≦ys≦0.06, 0≦yl≦0.02 and 0≦yl / ys<1, where (ys) is a ratio of the M element in the above general formula in the small particles and (yl) is a ratio of the M element in the general formula in the large particles.

The present invention provides for methods of purifying silicon, methods for obtaining purified silicon, as well as methods for obtaining purified silicon crystals, purified granulized silicon and / or purified silicon ingots.

There is provided a process for preparing compounds of formula M3M1A2. The process comprises reacting a compound of formula M2M1A2 with a compound of formula M3X2, in the presence of at least one coordinating solvent. M1 can be chosen from B3+, Al3+, Ga3+, In3+, Tl3+, Fe3+, and Au3+; M2 can be chosen from Li+, Na+, K+, Cs+, (T1)3Si—, and N(T2)4+; M3 can be chosen from Cu+, Ag+, Li+, Na+, K+, Cs+, Rb+, Fr+, Au+, and Hg+; A can be chosen from S and Se; and X2 can be chosen from Cl−, Br−, I−, F−, CH3COO−, NO3−, and CN−. Such compounds can be used for various purposes in the field of electrochemistry.

The present invention is drawn to a method for removing colloidal titanium dioxide and titanium oxychloride from by-product hydrochloric acid. The method includes adding phosphate ion source and quaternary amine to the by-product acid to cause the titanium dioxide and the titanium oxychloride to form a precipitate. The precipitate can then be separated from the acid, thus producing a decontaminated hydrochloric acid product with reduced levels of titanium.

A method for preparation of iodizing agent for the use in the formulation of iodized salt that offers excellent stability of iodine in iodized salt is developed and the unrefined salt iodized with this compound was tested for its stability in presence of moisture, temperature and metal salts at higher temperature. The hydrotalcite type layered compound was used to prepare such compound and part of carbonate was substituted with iodate anion. The iodizing agent exhibited excellent stability of iodine in iodized salt.

The present invention provides a method for producing polycrystalline silicon. The method for producing polycrystalline silicon comprises the steps of (A), (B), and (C),(A) reducing a chlorosilane represented by the formula (1) with a metal at a temperature T1 to obtain a silicon compound;SiHnCl4-n  (1) wherein n is an integer of 0 to 3,(B) transferring the silicon compound to a zone having a temperature T2, wherein T1>T2; and(C) depositing polycrystalline silicon in the zone having a temperature T2, wherein the temperature T1 is not less than 1.29 times of a melting point (Kelvin unit) of the metal, and the temperature T2 is higher than a sublimation point or boiling point of the chloride of the metal.