Showing papers on "Dichlorophenylphosphine published in 2016"
TL;DR: In this article, the synthesis, thermal stability, and flame retardancy of PA66, treated with derivatives of dichlorophenylphosphine, are reported, along with improving its consistency.
Abstract: Synthesis, thermal stability, and flame retardancy of PA66, treated with derivatives of dichlorophenylphosphine, are reported. With an aim to improve the thermal stability and flame retardancy of PA66, along with improving its consistency, several new derivatives of dichlorophenylphosphine, namely bis-(4-carboxyanilino) phenyl phosphamide (BNPO), N-benzoic acid-(ethyl-N-benzoic acid formamide) phosphamide (NENP), poly-N-aniline-phenyl phosphamide (DPPD), and bis-N-benzoguanamine-phenyl phosphamide (MCPO), were synthesized, which resulted in end amino or carboxyl. FTIR, 1H NMR, MS, and elemental analysis confirmed the chemical structures of the synthesized flame retardants. Interestingly, thermal stabilities and flame retardancies of PA66 improved, however, the intrinsic viscosities ([η]) and viscosity average molecular weights (Mη) decreased with grafting of the flame retardants. Moreover, the consistency was overcome conformingly using SEM without interfacial effect.
18 citations
Patent•
06 Jul 2016
TL;DR: In this paper, a method for producing dichlorophenylphosphine using a tubular reaction was proposed, where simple-substance phosphorus and phosphorus chloride were used as raw materials.
Abstract: The invention relates to a method for producing dichlorophenylphosphine.According to the technical scheme, chlorobenzene, simple-substance phosphorus and phosphorus chloride are adopted as raw materials and subjected to a reaction in a tubular reactor, and the dichlorophenylphosphine is obtained, wherein the reaction equation of the dichlorophenylphosphine is P4+6C6H5Cl+2PCl=6C6H5PCl.The method has the advantages that due to the fact that the main reaction is performed in the tubular reactor, no catalyzer is needed, the materials can directly reach reaction conditions proportionally to be subjected to a rapid reaction, the production cycle is shortened, and generation of a large number of by-products is avoided; meanwhile, potential safety hazards brought by a high-temperature and high-pressure reaction by means of an autoclave in the prior art are avoided; no waste gas or waste residues or waste water is generated in the production process, operation is easy, products are easy to separate, and the product purity is high; the adopted raw material cost is low, the yield is high, and the produced dichlorophenylphosphine has the large cost advantage and environment-friendly advantage compared with dichlorophenylphosphine prepared through an existing technology.
3 citations
TL;DR: In this paper, a copper-mediated reaction of oxazirconacyclopentenes with dichlorophenylphosphine afforded 2,5-dihydro-1,2-oxaphosphole in high yields, in which was performed conveniently in one-pot from an alkyne, carbonyl compound and dichlorophosphine.
Abstract: Copper-mediated reaction of oxazirconacyclopentenes with dichlorophenylphosphine afforded 2,5-dihydro-1,2-oxaphosphole in high yields, in which the reaction was performed conveniently in one-pot from an alkyne, carbonyl compound and dichlorophosphine.
Patent•
04 May 2016
TL;DR: In this paper, a method for producing 2-carboxethyl phenylphosphinic acid without wastewater was proposed. But the method is not suitable for the use of large amounts of wastewater.
Abstract: The invention relates to a method for producing 2-carboxethyl phenylphosphinic acid without wastewater. According to the technical solution, dichlorophenylphosphine, acyclic acid and water are taken as raw materials, dichloropropane is taken as a solvent, and the method comprises the following steps of fully reacting the dichlorophenylphosphine and the acyclic acid to generate an acyl chloride intermediate; dropwise adding water into mixed liquor of the acyl chloride intermediate and dichloropropane according to a reaction mole ratio, and performing hydrolysis to generate the 2-carboxethyl phenylphosphinic acid. A required amount of water is added dropwise in reaction, so that production of a large amount of acidic wastewater is avoided, and moreover, a high-quality byproduct hydrochloric acid is recycled; the dichloropropane is taken as the solvent, so that the problem that conventional process wastewater contains 2-carboxethyl phenylphosphinic acid is solved, and yield is increased; the dichloropropane can be distilled for continuous use after being recycled for many times, so that the production cost is reduced, and the problem of existence of a large amount of wastewater in a conventional production process is solved.