Shell-and-tube strippers for stripping a urea/carbamate mixture, related systems, methods, and uses. The stripper includes a shell, a plurality of tubes disposed within the shell, and a heating fluid distributor for homogenizing the flow of a heating fluid near a heating fluid inlet. The heating fluid distributor includes an edge wall and a laterally disposed heating fluid distribution plate. Related systems, methods, and uses are also provided.

The present specification discloses a latent hardener in which only the surface of the hardener is selectively deactivated under a carbon dioxide or inert gas atmosphere, a one-component epoxy adhesive including the same, and a preparation method thereof.

The present specification discloses a latent hardener in which only the surface of the hardener is selectively deactivated under a carbon dioxide or inert gas atmosphere, a one-component epoxy adhesive including the same, and a preparation method thereof.

The present invention relates to a method of carrying out an organic reaction in aqueous solution in the presence of a hydroxyalkyl(alkyl)cellulose or an alkylcellulose.

A method for simultaneously extracting Lycopene and Citrulline from a watermelon includes: separating the rind and the pulp of the watermelon, preprocessing the rind, and using the preprocessed rind to extract the Citrulline; subjecting the pulp to biological enzymolysis and filtering, centrifuging a filtrate, using a precipitate and a filter residue obtained after the centrifuging to extract the Lycopene, and using a supernatant obtained after the centrifuging to extract the Citrulline. By using the method for synchronously extracting Lycopene and Citrulline from the watermelon of the present invention, about 0.5 kg of Lycopene (6% content) and more than 1.2 kg of Citrulline which are worthy of nearly ten thousand yuan can be extracted from each ton of imperfect watermelons, the economic benefit of each ton of watermelons can be increased by more than 5000 yuan after extraction costs are deducted, and the method is high in economic benefits.

A method for simultaneously extracting Lycopene and Citrulline from a watermelon includes: separating the rind and the pulp of the watermelon, preprocessing the rind, and using the preprocessed rind to extract the Citrulline; subjecting the pulp to biological enzymolysis and filtering, centrifuging a filtrate, using a precipitate and a filter residue obtained after the centrifuging to extract the Lycopene, and using a supernatant obtained after the centrifuging to extract the Citrulline. By using the method for synchronously extracting Lycopene and Citrulline from the watermelon of the present invention, about 0.5 kg of Lycopene (6% content) and more than 1.2 kg of Citrulline which are worthy of nearly ten thousand yuan can be extracted from each ton of imperfect watermelons, the economic benefit of each ton of watermelons can be increased by more than 5000 yuan after extraction costs are deducted, and the method is high in economic benefits.

A method for simultaneously extracting Lycopene and Citrulline from a watermelon includes: separating the rind and the pulp of the watermelon, preprocessing the rind, and using the preprocessed rind to extract the Citrulline; subjecting the pulp to biological enzymolysis and filtering, centrifuging a filtrate, using a precipitate and a filter residue obtained after the centrifuging to extract the Lycopene, and using a supernatant obtained after the centrifuging to extract the Citrulline. By using the method for synchronously extracting Lycopene and Citrulline from the watermelon of the present invention, about 0.5 kg of Lycopene (6% content) and more than 1.2 kg of Citrulline which are worthy of nearly ten thousand yuan can be extracted from each ton of imperfect watermelons, the economic benefit of each ton of watermelons can be increased by more than 5000 yuan after extraction costs are deducted, and the method is high in economic benefits.

A method for simultaneously extracting Lycopene and Citrulline from a watermelon includes: separating the rind and the pulp of the watermelon, preprocessing the rind, and using the preprocessed rind to extract the Citrulline; subjecting the pulp to biological enzymolysis and filtering, centrifuging a filtrate, using a precipitate and a filter residue obtained after the centrifuging to extract the Lycopene, and using a supernatant obtained after the centrifuging to extract the Citrulline. By using the method for synchronously extracting Lycopene and Citrulline from the watermelon of the present invention, about 0.5 kg of Lycopene (6% content) and more than 1.2 kg of Citrulline which are worthy of nearly ten thousand yuan can be extracted from each ton of imperfect watermelons, the economic benefit of each ton of watermelons can be increased by more than 5000 yuan after extraction costs are deducted, and the method is high in economic benefits.

The present invention relates to a method of carrying out an organic reaction in aqueous solution in the presence of a hydroxyalkyl(alkyl)cellulose or an alkylcellulose.

The present invention relates to the technical field of natural substance extraction. Disclosed is a method for extracting Citrulline from a watermelon. The method for extracting Citrulline from a watermelon in the present invention comprises Raw material pretreatment, ultrasound-enzymatic hydrolysis assisted solvent leaching, and purification steps. The purification step comprises microbial fermentation, ion-exchange resin purification, macroporous adsorption resin discoloration, and crystallization and recrystallization. The method for extracting Citrulline in the present invention is simple, requires a mild condition, and has a good extraction effect on Citrulline. The purity of Citrulline after purification is more than 90%. In addition, the Citrulline extracted by the method in the present invention meets the related health requirements and product quality standards, can be applied to food and health food industries as a raw material, and has natural security advantages.