34results about How to "Inhibition of the reverse reaction" patented technology

The invention relates to a method for improving stability of an organosilicone pressure-sensitive adhesive for a protective film. The method comprises steps as follows: step 1), removal of water and hydroxyl: a water and hydroxyl removal agent containing organic acyloxy silane compounds is added to a reaction system to reduce water left in the adhesive and hydroxyl left on an adhesive structure; step 2), thorough inactivation of a catalyst: a) when primary amine or secondary amine is used as a condensation polymerization catalyst, an adhesive reaction system is kept at the temperature of about 70 DEG C at the nitrogen reaction atmosphere, primary amine or secondary amine and aldehydes, ketones or low-level carboxylic acid react to generate Schiff base, generated unstable Schiff base reacts with diethyl malonate, and Schiff base becomes beta-amino acid without catalytic activity; b), when secondary amine or tertiary amine is used as a condensation polymerization catalyst, acidic compounds which can react with secondary amine or tertiary amine to generate a stable compound are added to the reaction system; step 3), residual small molecular substances are removed in the vacuum state; step 4), neutralization of residual acidic compounds: sodium alcoholate is added to neutralize residual acidic compounds in the adhesive.

The invention provides a method for expanding stability of an organosilicone pressure-sensitive adhesive. The method comprises the following steps: (1) removing water; (2) removing hydroxyl, namely adding a silicon hydroxyl remover containing a trialkyl silicon carboxylate compound to a reaction system to reduce residual oxhydryl in an adhesive molecular structure; (3) thoroughly inactivating a catalyst, wherein the step is performed according to the following two conditions: when primary amine or secondary amine is utilized as a polycondensation catalyst, enabling the primary amine or the secondary amine to react with aldehydes or ketones and low-level carboxylic acid to generate a schiff base in a nitrogen reaction atmosphere, enabling the generated instable schiff base to react with diethyl malonate, and changing the schiff base into beta-amino acid free of catalytic activity; and when secondary amine or tertiary amine is utilized as the polycondensation catalyst, adding an acid substance which can react with the secondary amine or the tertiary amine to form a stable compound to the reaction system; (4) removing residual small molecular substances in vacuum; and (5) neutralizing the residual acid substance.

The invention discloses a sulfur dichloride preparation method and preparation device. The preparation method comprises the following steps: carrying out synthesis reaction on sulfur monochloride and chlorine gas as raw materials at a temperature of 60 DEG C to 120 DEG C to obtain a gaseous mixture, loading the obtained gaseous mixture into a catalytic reactor filled with silicon oxide, carrying out catalytic reaction at 60 DEG C to 90 DEG C to obtain a product, condensing the obtained product and collecting the same so as to obtain liquid sulfur dichloride. The preparation device comprises a reaction liquid kettle, the catalytic reactor, a condenser and a receiver kettle, which are communicated with each other in sequence, and the reaction kettle is provided with an air tube, the catalytic reactor comprises a catalytic reaction tube and a heating tube sleeving the catalytic reaction tube, the ends of the catalytic reaction tube are open, one end of the catalytic reaction tube is connected with the reaction liquid kettle, and the other end is connected with the condenser; one end of the heating pipe is provided with a heating medium inlet and the other end is provided with a heating medium outlet. The preparation method has the advantages of simple process, no catalyst residue, no distillation, high product purity and high yield and the like. The device is simple, continuous and stable to operate, and no waste is generated.

The invention discloses a catalytic hydrogen production method and device suitable for a hydrogen energy automobile. The method disclosed by the invention specifically comprises the following steps: electromagnetically heating to dry a catalyst under nitrogen protection, stopping introduction of nitrogen and starting a liquid organic hydride cooler; starting a temperature control rheometer, maintaining the rotating speed of a rotary electromagnetic heating disc, and after the catalyst is stabilized at the reaction temperature, spraying, atomizing and feeding the liquid organic hydride intermittently; and condensing, separating and discharging the product hydrogen. According to the method and device disclosed by the invention, hydrogen production reaction conditions are uniformly designed and optimized to obtain the optimal reaction conditions. According to the method and device disclosed by the invention, a noble metal catalyst is replaced by cheap raney nickel, so that the reaction cost is lowered, and a carbon deposition deactivated catalyst can be regenerated by eliminating carbon with water vapor. A spraying and atomizing feeding method is adopted, the rotary electromagnetic heating is arranged, the surface temperature return time of the catalyst is fully utilized, and dehydrogenation reaction is carried out under a wet-dry multiphase reaction condition, so that the reaction efficiency is improved. No carrier gas is adopted, and the produced hydrogen is high in purity and free of being re-separated, so that the method and device are suitable for the hydrogen energy automobile.

The invention belongs to the field of ferrotitanium smelting and particularly relates to a production method of high-quality ferrotitanium by an electric furnace remelting method of a Panxi titanium raw material. The production method comprises the following steps: with 100Kg of raw materials including a Panxi-region titanium-rich material and a steel material as weight reference, adding auxiliary materials into the raw materials according to weight proportion; and smelting by an electric furnace remelting method to obtain a product of high-quality ferrotitanium in which the total impurity content is lower than 5%, wherein the raw materials include 30-90% of Panxi-region titanium-rich material and 10-70% of steel material, and the added auxiliary materials include 0.25-1.0Kg of aluminum reducing agent, 0.3-1.0Kg of auxiliary reducing agent and 1.0-1.5Kg of calcium metallurgy auxiliary material. In the invention, the source of raw materials is stable, the production technology is safe and reliable, the electric energy consumption is low, the ferrotitanium grade is high, the impurity content is low, a high-quality ferrotitanium product with stable quality is formed, and the production cost is reduced; and moreover, the industrialization of production by the ferrotitanium remelting method is realized, and the need of users for high-quality high-grade ferrotitanium is met.

The invention discloses a method for improving stability of an organosilicone pressure-sensitive adhesive. The method comprises steps as follows: step 1), removal of water and hydroxyl: a water and hydroxyl removal agent containing alpha-functional group siloxane compounds is added to a reaction system; step 2), thorough inactivation of a catalyst: inactivation is performed in the following two ways: a) when primary amine or secondary amine is used as a condensation polymerization catalyst, the adhesive reaction system is kept at the temperature of about 70 DEG C at the nitrogen reaction atmosphere, primary amine or secondary amine and aldehydes, ketones or low-level carboxylic acid react to generate Schiff base, generated unstable Schiff base reacts with diethyl malonate, and Schiff base becomes beta-amino acid without catalytic activity; b), when secondary amine or tertiary amine is used as a condensation polymerization catalyst, acidic compounds which can react with secondary amine or tertiary amine to generate a stable compound are added to the reaction system; step 3), residual acidic compounds are neutralized; step 4), residual small molecular substances are removed in the vacuum state.

The invention discloses a continuous production device and method of a cartap intermediate thiocyanide. The continuous production device comprises a charging unit, a reacting unit and a postprocessingunit which are sequentially connected, wherein the reacting unit comprises a first-stage tubular reactor and a second-stage tubular reactor; a first-stage water phase outlet is formed in the upper part of the first-stage tubular reactor; a first-stage oil phase outlet is formed in the bottom of the first-stage tubular reactor; a second-stage water phase feeding opening is formed in the lower partof the second-stage tubular reactor; a second-stage oil phase feeding opening and a second-stage water phase outlet are formed in the upper part of the second-stage tubular reactor; a second-stage oil phase outlet is formed in the bottom of the second-stage tubular reactor; the first-stage water phase outlet communicates with the second-stage water phase feeding opening through a pipeline; and the first-stage oil phase outlet communicates with the second-stage oil phase feeding opening through a pipeline. Through the adoption of the continuous production device and the method disclosed by theinvention, the contact of sodium sulfite with the thiocyanide can be effectively reduced, a reverse reaction is restrained, and the reaction yield is increased.