91results about How to "Improve oxidation reaction efficiency" patented technology

Process for the oxidation of a hydrocarbon comprising partially oxidizing in a reaction zone, a mixture comprising a hydrocarbon and an oxygen-containing gas in the presence of a catalyst which is capable of supporting oxidation of the hydrocarbon. Prior to the partial oxidation, the mixture comprising the hydrocarbon and the oxygen-containing gas is passed through a heat exchanger which provides a pressure drop which acts to even the velocity profile and ensure that the reactants flow uniformly over the catalyst.

An apparatus for discharge gas treatment (10) having a denitration catalyst layer (13) which removes nitrogen oxides from a discharge gas and in which hydrochloric acid is sprayed in the discharge gas to oxidize mercury. The apparatus has a spiral-flow generation member (15A) in each of passages (14) of the denitration catalyst layer (13). The member (15A) comprises: a vertical shaft (22) disposed in the passage (14) of the honeycomb catalyst; and sets of four spiral-flow generation blades (23) which have been disposed radially on the vertical shaft (22) and cause a turbulent flow in the discharge gas, the sets of the spiral-flow generation blades (23) having been arranged at a given interval in the direction of the vertical shaft (22). By thus generating a spiral flow in the discharge gas in each passage (14) of the denitration catalyst layer (13), the time period of contact of the discharge gas with the denitration catalyst is prolonged to improve the efficiency of the oxidation reaction of the mercury contained in the discharge gas with the denitration catalyst.

The invention discloses a preparation method of nano-cellulose, comprising the following steps of: firstly, swelling the raw material cellulose by aqueous alkali, soaking for a while, centrifugally separating out cellulose, and washing by deionized water till the filter liquor is neutral; dispersing the separated cellulose in water, adding sodium bromide, 2, 2, 6, 6-tetramethyl piperidine-1-oxide and sodium hypochlorite solution, carrying out an oxidation reaction under sonic oscillation, centrifugally separating after reaction, and carrying out freeze drying treatment on suspension liquid to obtain the nano-cellulose powder. Compared with the prior art, the preparation method is incompact in cellulose structure, can enlarge the unit cell distance, and can improve the reaction accessibility after the raw material cellulose is pretreated, so that the oxidation reaction efficiency can be improved, and the product yield can be obviously improved; the oxidation reaction conditions are mild, and are easy to control, and the product quality can not be influenced due to the fact that only a small quantity of sodium chloride and minute quantity of oxidizing agent are mixed in a reaction system after the reaction; and the sonic oscillation is adopted in the process of reaction, so that the oxidation reaction speed can be accelerated, and the reaction time can be obviously shortened.