63results about How to "The method is simple and economical" patented technology

The present invention provides a catalyst comprising a composite of a heteropolyacid impregnated on a support for the synthesis of 2- and 4-picolines and a process for the preparation thereof and use thereof for the synthesis of 2- and 4-picolines.

The invention relates to a method for producing a micromechanical component (300) that comprises providing a first substrate (100), forming a microstructure (150) on the first substrate (100), wherein the microstructure (150) comprises a moving function element (151), providing a second substrate (200), and forming in the second substrate (200) an electrode (251) for capacitively measuring a deflection of the function element (151). The method further comprises connecting the first and the second substrates (100; 200), wherein a closed cavity which encloses the function element (151) is formed, and wherein the electrode (251) adjoins the cavity in an area of the function element (151).

The present invention provides an instant radix millettiae speciosae and a preparation method thereof. The method comprises the following steps: 1) fresh radix millettiae speciosae is washed, the washed radix millettiae speciosae is sliced, the sliced radix millettiae speciosae is crushed, water is added, the crushd radix millettiae speciosae is subjected to a vacuum flash extraction, and the extracted radix millettiae speciosae is filtrated, wherein the vacuum flash extraction is conducted at a temperature of 60-90 DEG C and a vacuum degree of -0.08 to -0.098 MPa; 2) the radix millettiae speciosae extract is concentrated and dried to obtain a dried radix millettiae speciosae paste; and 3) the dried paste is crushed to obtain the instant radix millettiae speciosae. The vacuum flash extraction fully dissolves the various active ingredients in the radix millettiae speciosae and also solves the problem that the extraction of the radix millettiae speciosae is serious in blistering. Then a series of specific technologies are used to obtain the instant radix millettiae speciosae, so that the nutrients of the fresh radix millettiae speciosae are maximally preserved. The present invention also provides a consumption method of the instant radix millettiae speciosae.

The invention relates to a method for the production of L-carnitine, wherein a [beta] -lactone, which is a 4-(halomethyl)oxetane-2-one, is converted into carnitine with trimethylamine (TMA), wherein the [beta] -lactone is not subjected to a basic hydrolysis step before being contacted with the trimethylamine. The invention also relates to a carnitine having a unique impurity profile.

The invention discloses a preparation method of environment-friendly CI disperse orange 29, which belongs to the technical field of disperse dyes. The preparation method comprises: stirring and dispersing the dye filter cake of untreated CI disperse orange 29 in water into a slurry; At ‑100°C, use sodium hydroxide and / or sodium carbonate to adjust the pH to greater than 9, and then use sulfuric acid and / or hydrochloric acid to adjust the pH to 7‑9; then filter and separate, and wash the filter cake with water until the pH is neutral; the separated environmental protection Type CI Disperse Orange 29 filter cake, through sanding, coloring, drying commercial processing of disperse dyes, the finished dye product of CI Disperse Orange 29 which is environmentally friendly can be obtained. The method of the present invention is simple and economical, and can limit the detectable anthranilic ether in the dye product of CI Disperse Orange 29 to below 150ppm, which meets the national standard; thus the dyed textile meets the EU standard.

The invention discloses a multi-scale helical structure fiber bundle and a preparation method thereof. Through an electrospinning technique and a twisting and multistrand overtwist method, the preparation method of the multi-scale helical structure fiber bundle succeeds in preparing a series of multi-scale helical structure fiber bundles. The multi-scale helical structure fiber bundles can compound varied materials and integrate varied functions and have excellent intensity, flexibility, stretchability and resilience. Moreover, the diameter and length of the fiber bundles can be controlled, and the fiber bundles can be randomly bent and weaved and have broad application.

The invention provides a method for producing a ceramic die core. The method comprises the following steps of (1) producing a ceramic die core blank; (2) pre-treating a filler for the shaping of the ceramic die core, specifically adding the filler to be treated into a nonmetal material hopper with de-ionized water, continuously stirring slurry obtained by mixing powder and de-ionized water, continuously dropwise adding analytically pure hydrochloric acid to adjust the pH value of the slurry to 4 to 6, stopping adding analytically pure hydrochloric acid when the pH value is changed by less than or equal to 0.2 within 5 minutes, continuing stirring the slurry for 10 to 60 minutes, standing and settling the slurry for 4 to 12 hours, pouring an upper-layer solution, washing settled powder for 1 to 3 times by using de-ionized water until the pH value of an obtained solution is 6 to 8, drying the powder finally sinking to the bottom at 100 to 140 DEG C, calcining the powder for 4 to 6 hours at 1200 to 1500 DEG C, and crushing and sieving the powder; (3) performing shaping calcination; (4) performing reinforcement reconditioning. The method is simple, economical and low in time consumption, manpower is saved, energy consumption is eliminated, the production efficiency of the ceramic die core is greatly improved, and the quality of the ceramic die core is improved.

The invention relates to a construction method for a large-span cast-in-situ beam slab support system of a plant, which is characterized in that a middle part and an upper part of a shear wall are respectively buried with I-shaped steel to stretch over a room, and a pull ring 9 is welded on the one-third, a cross part, of the middle I-shaped steel 1 for obliquely drawing a steel wire rope 7 between wall bodies, a roof full scaffold is supported on two layers of the I-shaped steel 1 to unload the I-shaped steel 1 through obliquely drawing the I-shaped steel 1 and the steel wire rope 7 between the shear walls with a turnbuckle 8, and the forced deformation of the support system is measured and controlled by measuring the deformation of the I-shaped steel 1 in the concrete casting and loading process. The embodiment scheme of the construction method is that the settlement deformation of the I-shaped steel 1 in different loading stages can be measured through a leveling instrument in the process of the concrete casting and loading process, if the deformation exceeds a preset limit value, the I-shaped steel is unloaded through fastening the turnbuckle 8 to strain the steel wire rope 7,so as to prevent the deformation from exceeding the preset limit value, and the loading deformation value of the support system can be continuously kept in the limit value range through circulating operation, thereby achieving the effective measureable and controllable effect.

The invention discloses a lachnum exopolysaccharides carboxymethylation derivative and an application thereof in preparation of chronic renal failure-resistant medicines. The lachnum exopolysaccharides carboxymethylation derivative is characterized in that lachnum exopolysaccharides with the strain collection number of CCTCC No: M 2011196 are subjected to chloroacetic acid carboxymethylation modification to obtain the lachnum exopolysaccharides carboxymethylation derivative, and the lachnum exopolysaccharides carboxymethylation derivative in an effective dose and medical auxiliary materials are prepared into tablets and capsules for clinical use according to a conventional preparation method in pharmaceutics due to the effect of obviously resisting chronic renal failure. The pharmacodynamic experiment proves that the exopolysaccharides and carboxymethylation derivative has an obvious effect of resisting chronic renal failure and does not have a toxic or side effect, and the preparation method is simple and economic.

The present invention relates to the technical field of organic synthesis, in particular to a synthetic method for thioetherification and thiocarbonylation of halogenated alkanes; using methyl 3-methylthiopropionate derivatives as vulcanizing agents to realize the thioetherification and thiocarbonylation of halogenated alkanes Thiocarbonylation: Use IPrCuCl as a catalyst to realize thioetherification; in the presence of carbon monoxide, use IPrCuCl and bis-salicylamide ethyl cobalt to co-catalyze to obtain thioesters. The vulcanization reagent is easy to synthesize, the reaction conditions are relatively mild, and the practicability is strong. The invention avoids the use of mercaptans with strong odor, high toxicity and environmental pollution, has good functional group tolerance, excellent yield and purity, does not require harsh reaction conditions, and is suitable for industrial production.

The invention provides a heteropolyacid complex impregnated on a support, a catalyst for synthesizing 2-picoline and 4-picoline, a preparation method thereof, and a catalyst for synthesizing 2-picoline and 4-methylpyridine The use of pyridine.