46results about How to "Prevent decomposition reaction" patented technology

The invention discloses a front-end automatic feeding and sieving and de-ironing device in a rice husk three-state decomposition process. The front-end automatic feeding and sieving and de-ironing device comprises an outer conveying mechanism, a sieving and de-ironing mechanism and a discharging propelling mechanism which are connected in sequence, wherein the outer conveying mechanism comprises a containing bucket, a conveying pipe, a conveyor belt arranged in the feeding conveying pipe and a feeding elbow pipe; the sieving and de-ironing mechanism comprises a hopper arranged under the feeding elbow pipe and the conveying pipe is arranged under the hopper; the conveying pipe is provided with a vibration cover; the vibration cover is internally connected with a first vibration device and a second vibration device in sequence from top to bottom; and the discharging propelling mechanism comprises a transverse material conveying pipe, a transverse driving device, a transverse transmission blade, a discharging hopper, an observation opening and a transverse transmission rod. The invention aims at providing the front-end automatic feeding and sieving and de-ironing device in the rice husk three-state decomposition process; the conversion of rice husk three-state reaction is convenient, the production efficiency is improved, the impurity interferences are avoided and the safety accidents are avoided; and the service life of equipment is prolonged.

The invention discloses a synthetic method of salbactam acid. The synthetic method comprises the following steps: carrying out diazotized bromination reaction on 6-aminopenicillanic acid to form bromopenicillanic acid; and then, carrying out oxidation reaction and reduction reaction to obtain salbactam acid, wherein in the diazotized bromination reaction, 6-aminopenicillanic acid is continuously added in form of an acidic solution, the acidic solution of 6-aminopenicillanic acid is 5-8% sulfuric acid aqueous solution, 13-15% hydrobromic acid aqueous solution or 5-8% hydrochloric acid aqueous solution. 6-aminopenicillanic acid is dropwise added in form of the acidic solution, so that dust pollution is avoided and the work environment of field personnel is improved. Meanwhile, 6-aminopenicillanic acid exists in form of stable salt, decomposition reaction is avoided, and the reaction quality is improved. The three-step yield of the method is over 70%, the HPCL purity is over 99.7%, the individual impurity content is less than 0.1% and the total impurity content is less than 0.5%.

The invention provides a preparation method of modified limestone powder. The method comprises the following operation steps that (1) after big blocks of limestone are subjected to crushing treatment by a jaw type crushing machine, the limestone is sieved by a sieve being 20 to 30 meshes; (2) the sieved limestone is mixed with microcrystalline wax, then, an obtained mixture is conveyed to a material storage hopper by an elevator; next, the materials are uniformly, quantitatively and continuously conveyed into a host grinding chamber of an European style powder grinding machine to be ground through a vibration feeding machine; the ground limestone powder is blown up by wind and is graded by a powder selection machine; 325-mesh modified limestone powder is prepared. The preparation method of the modified limestone powder provided by the invention has the advantages that the operation is simple; the raw materials can be easily obtained; the manufacturing cost is low; the performance is stable; non-toxicity and harmlessness are realized; environment is protected; no pollution is caused; the preparation method is suitable for large-scale industrial production.

The invention discloses a wearproof glass fiber communication tube product. The wearproof glass fiber communication tube product comprises the raw materials shown in the specification in parts by weight in the formula of the communication tube product. An impact modifier is added in the formula of the glass fiber communication tube product, so that the toughness of the glass fiber communication tube product is improved, and the glass fiber communication tube product has the properties of compression resistance, impact resistance, high temperature resistance, and friction resistance.

The application discloses a high-concentration tetrapropylammonium hydroxide production process and the high-concentration tetrapropylammonium hydroxide prepared therefrom, and relates to the technical field of quaternary ammonium alkali production. The high-concentration tetrapropylammonium hydroxide production process includes the following steps: S1 electrolysis: take tetrapropylammonium quaternary ammonium salt, add water to prepare tetrapropylquaternary ammonium salt aqueous solution, through electrolysis, tetrapropylammonium cation and electrolysis produced Hydroxide ions are combined to form tetrapropylammonium hydroxide to obtain a crude product; S2 concentration: add 0.05-0.2 times the weight of n-propanol to the crude product, mix well to obtain a mixed solution, and heat the mixed solution to 60- Concentrate at 80°C for no less than 60 minutes to produce high-concentration tetrapropylammonium hydroxide. The high-concentration tetrapropylammonium hydroxide production process has the advantage of high production efficiency.

Provided is a semiconductor device capable of preventing, inter alia, the decomposition reaction of an antireflection film provided on a semiconductor substrate and the corrosion of a wiring layer, and capable of improving reliability. The semiconductor device comprises: a wiring layer (11); a titanium nitride layer (21) provided on the wiring layer (11); a titanium oxynitride layer (22) provided on the titanium nitride layer (21); a titanium oxide layer (23) provided on the titanium oxynitride layer (22); and surface protective films (31, 32) provided on the titanium oxide layer (23). The semiconductor device also has an opening (11b) that passes through the titanium nitride layer (21), the titanium oxynitride layer (22), the titanium oxide layer (23), and the surface protective films (31, 32) to expose a part of the wiring layer (11), and the exposed part of the wiring layer (11) constitutes a pad (11a).

An asphaltene thermal plasma cracking processing method comprises the following steps: a) asphaltene produced by an inferior heavy oil solvent deasphalting process is sprayed into a thermal plasma reactor through an atomization device; b) in the thermal plasma reactor, the asphaltene undergoes a mixed reaction with a hydrogen thermal plasma jet flow, and a crackate is obtained from the reaction; c) the crackate passes through a gas-solid fast separation device, and a solid phase product and a gas phase product with the temperature of 1600-2000 K are obtained, wherein the solid phase product is a solid carbon material; and d) the gas phase product enters a quenching device, and cracked gas containing acetylene, hydrogen gas and methane is obtained. The method is suitable for processing the asphaltene produced by the inferior heavy oil solvent deasphalting process, can realize high efficiency conversion of the asphaltene, and produces high-added-value products such as the solid carbon material, acetylene, hydrogen gas and the like.