- Synthetic method of 1,1'-dicaprolactam disulfide
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The invention discloses a synthetic method of 1,1'-dicaprolactam disulfide. Caprolactam is used as an initiator, and sulfur monochloride and caprolactam inorganic salt are used as raw materials. Sulfur monochloride firstly reacts with caprolactam to form 1,1'-dicaprolactam disulfide and acid; caprolactam inorganic salt is continuously converted to caprolactam under the action of the acid formed bythe reaction; and caprolactam continuously reacts with sulfur monochloride to form 1,1'-dicaprolactam disulfide. According to the method, there is no need to add other types of acid-binding agents, and the raw material caprolactam can be synthesized by itself in the reaction process. The production technology is simple, has strong operationality and simple post-treatment, and has industrial application value. The product is white solid powder in the appearance, and the yield is 88% and above, the purity is 99% and above. The product meets the use requirements.
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Paragraph 0009; 0022
(2019/08/30)
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- Caprolactamyl silane and preparation method thereof
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The invention discloses caprolactamyl silane and a preparation method thereof. The invention relates to the technical field of organic synthesis. According to the invention, caprolactam, a methanol solution and benzene are added into a three-necked flask with a stirring device; stirring and heating are carried out, and a reaction is allowed; an obtained material is cooled to room temperature; filtering is carried out; after a stirring reaction, solid salt is dried, such that caprolactam sodium salt is obtained; the prepared caprolactam sodium salt, chloropropyl silane, a phase transfer catalyst, and an organic solvent are added into a three-necked flask with a reflux device; stirring and heating are carried out, and a reaction is allowed; the temperature is maintained; after the reaction, the temperature is reduced to room temperature; filtering is carried out, such that a byproduct is removed, and a filtrate is extracted; the filtrate is subjected to reduced-pressure distillation; and the solvent is removed through vacuum heat preservation, such that caprolactamyl silane is obtained. The caprolactamyl silane provided by the invention has good compatibility with polyamide resin. The method has high reaction efficiency. When in use, caprolactamyl silane has good stability. When polyamide resin is combined with polyamide resin, a strength increase is higher than 20%. The cost is low, and strength increase is high.
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Paragraph 0043
(2016/11/07)
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- METHOD FOR PRODUCING LACTAMATES BY WAY OF THIN FILM EVAPORATION
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A method is described for producing lactamates by reacting alcoholates with lactams, wherein a reaction mixture comprising at least one alcoholate and at least one lactam is subjected to thin film evaporation.
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Page/Page column 4
(2012/04/04)
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- Novel ethyl benzylphosphinate derivatives, process for production thereof, and their use as calcium antagonist
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An ethyl benzylphosphinate derivative represented by the general formula (I) STR1 wherein Y represents a hydrogen or fluorine atom, X represents a methylene group or an oxygen atom, and n is 2, 3 or 4. The said compounds can be produced by reacting a compound represented by the following formula (II) STR2 wherein Y is as defined above, with a compound represented by the following formula (III) STR3 wherein X and n are as defined, and M is an alkali metal atom, in an inert medium. These compounds are useful as a calcium antagonist.
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