1046 results about "Phase reaction" patented technology

In order to provide a 3V level non-aqueous electrolyte secondary battery with a flat voltage and excellent cycle life at a high rate with low cost, the present invention provides a positive electrode represented by the formula: Li2±α[Me]4O8−x, wherein 0≦α<0.4, 0≦x<2, and Me is a transition metal containing Mn and at least one selected from the group consisting of Ni, Cr, Fe, Co and Cu, said active material exhibiting topotactic two-phase reactions during charge and discharge.

The present invention relates to a new olefin polymerization catalyst composition, and methods of preparing and methods of using the catalysts to polymerize various olefinic monomers in either gas or slurry phase reactions. The principal advance over the previous art of record involves using alumoxanes or combinations of alumoxanes as catalyst preactivators. Polymers prepared from these catalysts posses productivity increased as high as 40 percent. At the same time, the bulk density remains relatively constant. Additionally, the total amount of cocatalyst species needed to effectively practice the invention is relatively low.

The invention relates to a lithium iron phosphate intercalated composite material, a preparation method thereof and a lithium ion battery adopting the multi-layer graphene / lithium iron phosphate intercalated composite material as an anode material. In the prior art, the electronic conductivity of the lithium iron phosphate material is poor, high-rate charging / discharging capacity of the lithium ion battery adopting the lithium iron phosphate material as the anode material is poor. The purpose of the present invention is to solve the problems in the prior art, and improve the rapid charging capacity of the power lithium ion battery so as to meet the requirements of the pure electrocar. The composite material is prepared through the following steps that: a rheological phase reaction method is adopted for multi-layer graphene, a trivalent iron salt, a phosphorus compound, a lithium compound and carbon source of small organic molecule to obtain a composite precursor, then the precursor is sintered to obtain the multi-layer graphene / lithium iron phosphate intercalated composite material. The anode slurry of the lithium ion battery anode plate comprises the composite material, a conductive agent and polyvinylidene difluoride. The composite material is an intercalated structure, wherein the lithium iron phosphate particles are intercalated between the multi-layer graphene to form the intercalated structure. The trivalent iron salt is adopted as the raw material, such that the cost is reduced. The lithium ion battery has good charging / discharging cycle performance, wherein the specific capacity is more than 60 mA.h.g<-1> at the rate of 20C.

A process for temporarily interrupting a Fischer-Tropsch type reaction carried out on a feed comprising at least carbon monoxide and hydrogen is carried out in a three-phase reaction zone comprising a liquid phase, a gas phase and solid catalyst particles maintained in suspension, said process comprising a step a) for interrupting the reaction and a step b) for restarting said reaction, during which the solid catalyst particles are maintained in suspension in the reaction zone;a) during the step for interrupting the reaction, supply of the feed is stopped, and a blanket of an inhibiting gas comprising less than 1% by volume of hydrogen and at least 5% by volume of at least one inhibiting compound selected from the group formed by carbon monoxide and water is established; andb) during the reaction restart step, in the reaction zone, a blanket of an activating gas with a hydrogen content of at least 20% by volume is established and supply of the feed is restarted.

The invention relates to a method for synthesizing ethyl methyl carbonate through ester exchange. The method comprises the following steps: filling a fixed bed reactor with catalysts, pumping dimethyl carbonate and ethyl alcohol into the fixed bed reactor according to the molar ratio of 0.5-2:1 after nitrogen purging is carried out, reacting at the air speed of 0.5-15h-1, the temperature of 100-240DEG C and the reaction operation pressure of 0-1MPa, and finally the ethyl methyl carbonate is obtained. The catalysts are modified molecular sieve based catalysts. The method is simple in technology condition, easy to control, capable of achieving continuous production due to the gas-solid phase reaction and low in cost of the adopted catalysts. The selectivity of the ethyl methyl carbonate can be higher than 90%, and the yield can be higher than 55%.

The invention discloses a surface coating modified nano calcium oxide based CO2 adsorbing agent which is composed of internal nano calcium oxide and an external surface coating layer; the surface coating layer is prepared from at least one of Al2O3, Ca12Al14O33 and MgO. The invention further discloses a preparation method of the surface coating modified nano calcium oxide based CO2 adsorbing agent. An adsorption phase reaction method is utilized, and thickness and uniformity of the surface coating layer are controlled by controlling a reaction field, the method is simple and regulation and control are facilitated; according to the invention, the prepared surface coating modified nano calcium oxide based CO2 adsorbing agent has high CO2 adsorption capacity and obvious stability in adsorption ability in manifold cycles, can be in long-term recycling, and is an ideal adsorption agent in the adsorption process of high-temperature CO2.