物理性质
- 熔点-157 °C
- 沸点-153 °C
- 密度3.736
- PSA:0.0
- LogP:-0.3808
- 蒸汽压154000 mmHg at 25 °C
- 溶解性微溶于H2O
- 敏感性Stable and unreactive; not combustible.
- 外观形态无臭无色,压缩液化气体
- 储存条件贮运装卸过程中应轻拿轻放,谨防包装破损。
- 产品应用氪气(7439-90-9)的用途:可用于充填电离室以测量宇宙辐射,并可用作X射线工作时的遮光材料.
- 性质描述氪气(7439-90-9)的性状:氪是无色,无大嗅和无味的气体.沸点-153.35°C,大气中氪的含量极低(痕量,按体积计为1.14×10-6).化学性质:氪在所有正常条件下都是化学惰性的.它不和其它元素或化合物化合.然而,当氪和氟的混合物在84K时受到放电的作用,或者在123K时用电子束照射,均可生成KrF2.KrF2非常不稳定.在0°C即迅速分解.已经制备出了KrF4,它是一种不稳定的无色固体,是由元素在低温下受到放电作用而产生的.
欧盟法规
ECHA物质ECHA物质C&L通报REACH预注册氪(II)二氟化物置于水体系中,用 Sodium Hydroxide 作为反应溶剂,化学反应生成 氪气
参考文献:Infrared And Raman Spectra Of Krypton Difluoride
标题:Infrared And Raman Spectra Of Krypton Difluoride
摘要:The Infrared And Raman Spectra Of Krf2 Vapor Have Been Obtained. They Clearly Indicate A Linear And Symmetric Molecule With The Symmetric Stretching Frequency At 449 Cm−1,The Asymmetric Stretching Frequency At 588 Cm−1,And The Bending Frequency At 232.6 Cm−1. The Force Constants Are Fr=2.46,Frr=−0.20,And Fα=0.21 Mdyn/å. The Negative Bond-bond Interaction Constant Can Be Explained Neither By Valence Bond Models Nor By A Simple Molecular Orbital Model.
DOI:10.1063/1.1696102
专利信息
专利号:US-2016214860-A1
优先权日:2013-09-19
标题:Method of synthesis of unsolvated mixed cation borohydrides
发明人:JARON TOMASZ; WEGNER WOJCIECH; GROCHALA WOJCIECH
权利人:JAROÑ Tomasz; WEGNER WOJCIECH; GROCHALA WOJCIECH
摘要:The present invention relates to a novel method of synthesis of unsolvated mixed cation borohydrides of a general formula M x M′ y (BH 4 ) z , where M and M′ stand for metal cations, x, y, and z are stoichiometric coefficients. The method of synthesis according to the present invention is characterised in that the precursors having a general formula M[A n ] u and [Cat] v M′(BH 4 ) w are used for the synthesis, where [An] stands for a weakly coordinating anion; [Cat] stands for weakly coordinating cation; u, v, and w are the stoichiometric coefficients; and the synthesis is carried out under an inert to the reagents atmosphere—according to the general reaction equation: x M[An] u +y [Cat] v M′(BH 4 ) w →M x M′ y (BH 4 ) z +xu [Cat][An] where z=yw, xu=yv; M x M′ y (BH 4 ) z is the product of the reaction.
专利号:US-10661239-B2
优先权日:2016-04-29
标 题 :Catalytic reactor configuration, preparation and method of direct synthesis of ethylene through oxygen-free catalysis of methane
发明人:BAO XINHE; GUO XIAOGUANG; FANG GUANGZONG; PAN XIULIAN; MENG JINGHENG; YU QINQIN; TAN DALI
权利人:DALIAN INST CHEM & PHYSICS CAS
摘要:A reactor configuration comprises an inlet section I, a preheating section II, a transition section III, a reaction section IV and an outlet section V; except for the preheating section II and the reaction section IV, the existence of the inlet section I, the transition section III and the outlet section V depends on reaction conditions; and the process realizes no coke deposition synthesis of methane and high selectivity synthesis of ethylene. The methane conversion rate is 20-90%; ethylene selectivity is 65-95%; propylene and butylene selectivity is 5-25%; aromatic hydrocarbon selectivity is 0-30%; and coke deposition is zero.
专利号:US-4870199-A
优先权日:1986-04-30
标题 :Processes for the synthesis of diprotected R[R*,S*]-3,5-dihydroxy-6-oxohexanoate esters
发明人:CHEN KAU-MING; HARDTMANN GOETZ E; KAPA PRASAD K; LEE GEORGE T; LINDER JEROME; WATTANASIN SOMPONG
权利人:SANDOZ PHARMACEUTICALS CORP
摘要:Process for the synthesis of compounds of the formula in R[R*,S*] enantiomeric form, wherein each P1 is independently an hydroxy group-protecting group, and R2z is C1-4alkyl, benzyl or allyl, comprising, as a key step when R2z is R2x, the reaction of the compound of the formula in (S) enantiomeric form with a compound of the formula Mg &cir& +2 ((-)OOC-CH2-COOR2x)2 to obtain a compound of the formula in (S) enantiomeric form, and, as a key step when R2z is R2y, the reaction of a compound of the formula in (S) enantioimeric form with a compound of the formula Li(+)(-)CH2-COOR2y to obtain a compound of the formula in (S) enantiomeric form, wherein R2x is primary or secondary C1-4alkyl, benzyl or allyl, R2y is C1-4alkyl not containing an asymmetric carbon atom, and R3' is methyl or ethyl, processes for the synthesis of compounds of the formula comprising reacting a compound of the formula with the reaction product of a strong base and a compound of the formula optionally followed by, when R2z is allyl, cleavage of the allyl and P1 groups to obtain the corresponding compound of the formula wherein each R7 is methyl or ethyl, R is as defined in the specification, and each P1 independently and R2z are as defined above, and the compounds of the formula wherein R and each R7 are as defined above.
专利号:US-2004249114-A1
优先权日:2001-02-06
标题 :Methods of synthesis of polysuccinimide or polyaspartate by end capping polymerization
发明人:SWIFT GRAHAM; REDLICH GEORGE H; WEHBY JOHN NOLAN
摘要:Disclosed are methods of synthesis of homopolymers or copolymers containing succinimide or aspartate moieties formed in the presence of an end capping initiator. Also disclosed are methods of isolating, compounding, stabilizing and processing the homopolymers and copolymers.
专利号:US-2023257270-A1
优先权日:2020-07-10
标 题 :Synthesis of carbon nano-onions by nanodiamond annealing and functionalization of carbon materials
发明人:GOLSHARIFI NIMA; AMAKUBO SUGURU FREDERICK
权利人:NDB INC
摘要:Disclosed herein are methods of synthesizing carbon nano-onions, their functionalization methods, and their use as electrode material. More specifically, disclosed are methods of converting nanodiamonds into carbon nano-onions, chemical synthesis of carbon nano-onions from reagents, and functionalization using reagents, reactive gases, and photoexcitation. The use of the synthesized and functionalized carbon nano-onions as an electrode by using them as a composite structure is also disclosed.
专利号:US-2006211843-A1
优先权日:2001-02-06
标题:Methods of synthesis of poly(succinimide-aspartate) polysuccinimide or polyaspartate by end capping polymerization
发明人:SWIFT GRAHAM; REDLICH GEORGE H
权利人:SWIFT GRAHAM; REDLICH GEORGE H
摘要:Disclosed are methods of synthesis of homopolymers or copolymers containing succinimide or aspartate moieties formed in the presence of an end capping initiator. Also disclosed are methods of isolating, compounding, stabilizing and processing the homopolymers and copolymers.