35results about How to "Promote complete reaction" patented technology

The invention provides a preparation method of a barrier intercalation anti-mud type polycarboxylate water reducer. The method comprises the following steps: (1) adding a polyether macromonomer, a hydroxyl functional monomer, a phosphate functional monomer and water into a reaction kettle according to a certain proportion, stirring and heating until the materials are dissolved; (2) controlling thetemperature to be 55-60 DEG C, and starting to add a certain amount of a penetrant and a chain transfer agent; (3) after the addition of the penetrant and the chain transfer agent is finished for 5 minutes, starting to dropwise add a solution A and a solution B at the same time, starting to dropwise add a solution C within 10 minutes after the start of the dropwise addition of the solution A andthe solution B, wherein the dropwise addition time of the solution C is a hours, the dropwise addition time of the solution A and the solution B is a+0.5 hours, the solution A is prepared from an initiator, alcohol organic solvents and water, the solution B is prepared from hydrogen peroxide and water, and the solution C is prepared from carboxylate, acrylic acid and water; (4) after the end of the dropwise addition, heating up to 70-75 DEG C, maintaining the temperature to be constant, curing for b hours, adding a neutralizing agent when the temperature of the reaction solution is lower than30 DEG C, and replenishing water to obtain the barrier intercalation anti-mud type polycarboxylate water reducer.

The invention discloses a synthesizing process of N-methyl-5-hexene-1-amine, and relates to the technical field of medicine synthesis and removes the potential safety hazard that explosive hydrogen isgenerated in the existing process. The synthesizing process comprises the following steps: adding methylamine solution containing methylamine and a solvent into a reaction flask and then adding 6-bromine-1-hexene into the reaction flask, wherein the molar equivalent of methylamine is greater than that of 6-bromine-1-hexene; stirring the mixture; performing oil-bath heating to 40-50 DEG C, performing a reaction for 2-3h, cooling to 20 DEG C, adding a stabilizing agent, then adding sodium hydroxide, recycling excessive methylamine solution under negative pressure, heating to 50-60 DEG C, and performing reduced pressure distillation, so as to obtain colorless liquid, namely, the N-methyl-5-hexene-1-amine. According to the process, the explosive hydrogen is not generated, the synthesizing process is safe, no organic solvent extraction process exists, the process is environmentally friendly, and the product purity is high.

The invention discloses a 5-chloro-1-amylene synthesis method .The method comprises the steps that excess 4-amylene-1-alcohol and thionyl chloride are used as reaction raw materials, pyridine is used as a solvent, chlorination is catalyzed through a catalyst at low temperature, and5-chloro-1-amylene is obtained with high yield .The purpose of avoiding side reactions is achieved by changing technological conditions, and finally high selectivity and the high conversation rate of the reaction is achieved; after reaction liquid is processed, the product with the content of 98% or above can be obtained through a simple distillation means .By adding bismuth trioxide as the catalyst for catalyzing the reaction, low-temperature reaction is achieved, and the reaction conversion rate can reach 95.22% to the highest degree .

The invention provides a preparation method for a cross-linking type polycarboxylate water reducer by adopting carboxyl functional monomers. The preparation method includes adding polyether macromonomers, hydroxyl functional monomers, phosphate functional monomers and water into a reaction kettle, and performing stirring and heating until a mixture is dissolved; controlling a temperature at 55-60DEG C, and starting adding an initial initiator, an osmotic agent and a chain transferring agent; simultaneously dropping a solution A and a solution B after 5 min, and starting dropping a solution Cwithin 10 min after the solution A and the solution B start dropping, the dropping time of the solution C being a hour, the dropping time of the solution A and the solution B being a+0.5 hours, the solution C consisting of carboxyl functional monomers and water, the solution A consisting of ascorbic acid, a cross-linking agent and water, and the solution B consisting of hydrogen peroxide and water; heating to 70-75 DEG C after the dropping is finished, keeping the temperature constant, performing curing for b hour, adding a neutralizer when the temperature of a to-be-reacted solution is less than 30 DEG C, and replenishing water to 1,000 parts so that a water reducer can be obtained. The polycarboxylate water reducer with high dispersibility and keeping slump can be obtained through the preparation method.

The invention relates to a method for preparing an N7-guanine alkylate. The method comprises the following steps of: reacting 2'-deoxyguanosine serving as a raw material and iodoethane, ethylene oxide, 1-bromo-2-ethyl chloride, 3-allyl bromide or 1,2-dibromoethane serving as an alkylate in a dimethyl sulfoxide, glacial acetic acid or dimethyl acetamide solution at a temperature of 15-50 DEG C for0.5-96 hours; performing reduced pressure distillation after the reaction is finished; separating and purifying a rough product through silica gel column chromatography; and eluting with an eluent comprising acetic ether and petroleum ether in a volume ratio of (10-20):1 and an eluent comprising acetic ether and absolute methanol in the volume ratio of (10-20) :1 respectively to obtain the N7-guanine alkylate. The method has the advantages of mild reaction conditions, simple separation and purification process, high product yield, less environmental pollution and the like and contributes to mass production of the N7-guanine alkylate.

The invention discloses a preparing method of graft copolymerization carboxylate high-performance dehydragent belonging to dehydragent domain, which comprises the following steps: choosing methoxy carbowax with molecular weight distributing between 1000-2000 and acroleic acid or methacrylic acid as main raw material; adopting total acid method esterified priority method; preparing intermediate (big monomer) with polymerization activity; adding third monomer into polymerization reaction; adjusting polymerization activity of copolymerization system; proceeding technique route synthesis of main chain polymerization in the water solution. The getting big monomer possesses merits of high conversion rate, short reacting time, simple process flow and strong controlling property.

The invention discloses a heat shield and relates to the technical field of heat shields. The heat insulation cover includes a cover body and heat insulation cotton, the cover body is connected with the heat insulation cotton, the cover body includes an air intake section, a middle section and an exhaust section, and the air intake section is connected with the heat insulation cotton , the thickness of the cover body is 0.1-0.2mm, and the thickness of the heat insulation cotton is 5-7mm. The present invention uses SUS430 stainless steel with a thickness of 0.1-0.2mm as the cover body and glass fiber cotton with a thickness of 5-7mm as the heat insulation cotton, which can not only achieve heat insulation, promote the complete gas reaction, but also meet the requirements of light weight, and meet the national requirements. Six standards. The invention utilizes inorganic adhesives to ensure the assembly between the cover body and the heat insulation cotton, and can be firmly combined in a high temperature environment. The preparation method of the heat shield of the invention is simple and convenient for industrial application.

The invention relates to the field of preparation of biodiesel, and discloses a method and a system for preparing biodiesel by a tubular-variable temperature continuous method. The method comprises: directly introducing raw materials containing grease and alcohol from the lower part of a vertical tubular reactor to a vertical The reaction is carried out in a tubular reactor, and the first material flows out from the upper part of the vertical tubular reactor; the first material is introduced into one or at least two vertical tubular reactors connected in series for the reaction, and the last The upper part of a vertical tubular reactor obtains the second material; the second material is sequentially subjected to de-monohydric alcohol treatment and ester phase and glycerol separation treatment. The method for preparing biodiesel by the tubular-variable temperature continuous method provided by the present invention can avoid the defect that sediments are accumulated in the high-pressure heater when entering the preheater for preheating, which makes the device unable to operate stably for a long period of time.

The invention discloses a method for strengthening smelting and improving melt splashing in a bottom blowing smelting furnace, which belongs to the technical field of bottom blowing smelting furnaces. The method includes: cross-flow injection; staggered-peak injection; the combination of cross-flow injection and staggered-peak injection. Cross-flow injection is to ensure that the injection intensity of each group of adjacent spray guns is the same, by changing the position of the spray guns, the state of the two adjacent injection airflows is different, so as to alleviate the superposition of airflow, suppress splashing, and strengthen the injection. ; Staggered peak injection is to ensure that the positions of each group of adjacent spray guns are the same, by changing the injection intensity, the state of two adjacent injection airflows is different, so as to alleviate the superposition of airflow, suppress splashing, and strengthen the injection . With this method, the melt in the bottom blowing furnace can be stirred more evenly, the charge can be fully reacted, the slag produced by the bottom blowing smelting can be prevented from entraining metals and raw materials, the splashing of the melt surface layer can be improved, and the wall near the spray gun can be weakened. The phenomenon that the scouring stress is too concentrated can increase the productivity of the bottom blowing smelting furnace.