40results about How to "Enhance surface alkalinity" patented technology

The invention relates to a method for direct microwave heating modification and microwave heating synergistic ammoniation modification for enhancing basic groups on the surface of activated carbon. The main steps of the modification: a certain amount of coal-based activated carbon or ammoniated coal-based activated carbon, in N 2 Under protection, the modified active carbon is obtained by heating under the condition of microwave power of 300-900W, microwave radiation time of 8-20min, washing and drying with water. Tests show that the surface basic group content of the modified activated carbon prepared in different examples increases from 0.079mmol / g to 0.58mmol / g, the surface acid group content decreases from 1.57mmol / g to 0.30mmol / g, and the pH pzc The value increased from 6.83 to 7.97. The method of the present invention can significantly increase the content of basic groups on the surface of the modified activated carbon by microwave heating, thereby increasing the basic characteristics of the surface of the activated carbon, which is beneficial to the adsorption and removal of acidic organic pollutants and non-polar or weak polarity in the liquid phase Pollutants have the advantages of simple operation, easy control, energy saving, high efficiency, and low cost, and can be widely used in the treatment of pollutants.

This invention provides one kind of catalyst which can improve organic sulfur hydrolysis rate.First,organic sulfur hydrolysis additive and carrier material is made into alkaline material through the process of kneading drying roasting and grinding.Then,mixing the carrier material alkaline material and alkali soil material,also adding peptizing agent,the catalyst carrier can be made through the process of kneading extruding strip and roasting.The catalyst carrier cab be made into sulfur tolerant shift catalyst by impregnating active component molybdenum and cobalt either alkali metal.The outstanding advantages of this invention is that enhanceding the surface alkaline of carrier by adding alkali promoter in the carrier material, which not only improve the activities of catalyst to the organic sulfur,but also improve the low temperature activities of the catalyst.The catalyst of this invention can be used in pressure range of 1.0-5.0MPa.

The invention discloses a slope reinforcement device for building municipal engineering. The slope reinforcement device comprises a hollow long straight barrel. The outer wall of the barrel is provided with an outer thread. A bearing is fixed to the upper portion in the barrel. A guide rod is installed on an inner ring of the bearing in an interference mode. The guide rod and the barrel are located on the same axis. The lower portion of the guide rod is provided with a thread part. Gear inserting rods are installed on the two sides of the barrel correspondingly. Each gear inserting rod comprises a gear end and an inserting rod end which are connected with each other. The gear ends are rotationally installed on the barrel, and a part of each gear end is located in the barrel and meshes with the thread part of the guide rod. A notch part is arranged on part, on the lower portion of the barrel, of the side wall. The slope reinforcement device is reasonable inn structure design, and the unfoldable gear inserting rods and concrete mortar in a hole are combined to improve the stability.

The invention provides a method for improving the organic matter adsorbing performance of activated carbon, a product prepared thereby and the application thereof. The activated carbon prepared by themethod can effectively absorb organic matters; in the preparation process of the activated carbon, a technology is simple, modification treatment to the activated carbon can be completed through adjustment of the carbonization temperature and the carbonization atmosphere, and subsequent reprocessing is not required, so that by the technological process, the cost can be greatly reduced; in the modification treatment, alkaline gas generated by a spherical polymer itself is further used as a modifier, so that reasonable utilization of energy is achieved; in a manner in which the preparation andthe modification are carried out simultaneously, microporous structures on the surface of the activated carbon can be greatly increased and the specific surface area of the activated carbon is increased; compared with a treatment method of preparing the spherical activated carbon first and then modifying, the method provided by the invention has the advantages as follows: the preparation process is simple, and the prepared activated carbon has stronger adsorption capacity and has a wide application prospect.

The invention discloses a catalyst for the co-production of low-carbon olefins from syngas to gasoline and a preparation method thereof, wherein the preparation method of the catalyst comprises the following steps: (1) combining EDTA, EDTA2Na and Fe(NO 3 ) 3 9H 2 O is added to water to make a uniform Fe-EDTA-EDTA2Na complex solution without precipitation. In this complex solution, the content of Fe is that of the carrier γ-Al 2 o 3 10wt% by weight, the molar ratio of Fe, EDTA and EDTA2Na is 2:1:1; (2) the carrier γ-Al 2 o 3 Add it to the Fe‑EDTA‑EDTA2Na complex solution, mix well and dry overnight to obtain a solid; (3) Grind the solid into powder; (4) Roast the powder at 500‑600°C for 4h‑6h to obtain Fe‑ Na / γ‑Al 2 o 3 powder. The present invention is beneficial in that: the catalyst prepared by the method can not only improve the C 5 -C 11 hydrocarbon selectivity, and can enhance the C 2 -C 4 The alkenes ratio of hydrocarbons can also suppress the undesired product CH 4 It is suitable for the F-T synthesis of synthesis gas, and is one of the best catalysts for the co-production of low-carbon olefins from synthesis gas to gasoline.

The invention discloses a slope reinforcing device for construction municipal civil engineering. The slope reinforcing device for construction municipal civil engineering comprises a hollow, long and straight barrel body, wherein external threads are formed in the outer wall of the barrel body, a bearing is fixed to the upper portion of the inner wall of the barrel body, a guide rod is installed on the inner ring of the bearing in an interference manner, the guide rod and the barrel body are located on the same axis, a screw portion and a thread portion are arranged on the lower portion of the guide rod from top to bottom in sequence, gear insertion rods are installed on the two sides of the barrel body, each gear insertion rod comprises a gear end and an insertion rod end which are connected, each gear end is rotationally installed on the barrel body through a rotary shaft, and part of each gear end is located inside the barrel body and is meshed with the screw portion of the guide rod. The slope reinforcing device for construction municipal civil engineering is reasonable in structural design, and because the foldable gear insertion rods are combined with the concrete mortar in drill holes, stability is improved.

The invention provides a synthesis method of using a SrO-doped nano SnO2 material for preparing an NH3 sensitive material. The method uses cetyl trimethyl ammonium bromide as a surfactant, prepares SnO2 nano-particles by adopting a tin-particle nitric acid oxidation method, then carries out doping modification on a SnO2 matrix with SrO, and prepares the NH3 sensitive material. The doping of the SrO in the preparation method is proved to have a good promoting effect on NH3 gas sensitive response of the SnO2-based sensitive material. The addition of the SrO can significantly enhance the surfacealkalinity of the sensitive material and increase the number of strong alkali sites, and the SrO can form heterojunctions with SnO2. Therefore, after SrO doping, the sensitivity of the material is significantly enhanced, and the sensitive material with high response value of NH3 is obtained. A prepared NH3 sensor can realize rapid and highly sensitive detection of NH3, and has broad application prospects in NH3 detection.