摘要:
According to the present invention, there is a provided process for preparing 1,1,1,2,2-pentafluoropropane (245cb) and 2,3,3,3-tetrafluoropropene (1234yf), the process comprising: gas phase catalytic dehydrochlorination of a composition comprising 1,1,1-trifluoro-2,3-dichloropropane (243db) to produce an intermediate composition comprising 3,3,3- trifluoro-2-chloro-prop-1-ene (CF 3 CCl=CH 2 , 1233xf), hydrogen chloride (HCI) and, optionally, air; and gas phase catalytic fluorination with hydrogen fluoride (HF) of the intermediate composition to produce a reactor product composition comprising 245cb, 1234yf, HF, HCI and air; wherein the process is carried out with a co-feed of air.
摘要:
The present invention is directed to certain semifluorinated compounds and to compositions comprising such compounds. The invention further provides the use of the compounds and of the compositions as medicaments for topical administration to the eye.
摘要:
The present invention is a method for producing a fluorinated hydrocarbon represented by a structural formula (3), wherein an ether compound represented by a structural formula (1) and an acid fluoride represented by a structural formula (2) are brought into contact with each other in a hydrocarbon-based solvent, in the presence of a catalyst in which boron trifluoride is supported on a metal oxide: wherein R 1 and R 2 represent an alkyl group having 1 to 3 carbon atoms, R 3 represents a hydrogen atom, a methyl group or an ethyl group, and R 4 and R 5 represent a methyl group or an ethyl group; and R 1 and R 2 may be bonded to each other to form a cyclic structure. Through the present invention, a method for industrially advantageously producing 2-fluorobutane is provided.
摘要:
Heat transfer systems, methods and compositions which utilize a heat transfer fluid comprising: (a) from about 30% to about 65% by weight of HFC-134a; (b) from about 0% to about 70% by weight of HFO1234ze; and (c) from about 0% to about 70% by weight of HFO-1234yf, provided that the amount of HFO-1234ze and HFO-1234yf in the composition together is at least about 35% by weight, with the weight percent being based on the total of the components (a) - (c) in the composition.
摘要:
The present invention provides: a method for producing a fluorinated alkane represented by the formula (2): R 2 -F, wherein an alcohol having 3 to 5 carbon atoms is fluorinated by a fluorinating agent represented by the formula (1): R 1 SO 2 F in the absence of a solvent, and in the presence of a base selected from the group consisting of an amidine base and a phosphazene base; a method for separating and recovering an amidine base from an amidine base-sulfonate complex represented by the following formula (5): the method comprising: a step (I) of adding an alkaline aqueous solution to a solution obtained by dissolving an amidine base-sulfonate complex in an aromatic hydrocarbon, to precipitate a sulfonic acid alkali metal salt; a step (II) of adding water to the solution having the sulfonic acid alkali metal salt precipitated obtained in the step (I) to dissolve the sulfonic acid alkali metal salt, separating the aqueous layer having the sulfonic acid alkali metal salt dissolved and the layer of the aromatic hydrocarbon solution containing the amidine base from each other, and removing the aqueous layer having the sulfonic acid alkali metal salt dissolved; and a step (III) of distilling off the aromatic hydrocarbon from the aromatic hydrocarbon solution containing the amidine base obtained in the step (II); and a method for using a recovered amidine base. (In the formula, R 1 represents a methyl group, an ethyl group or an aromatic group, R 2 represents an alkyl group having 3 to 5 carbon atoms, and n is 0 or 2).
摘要翻译:本发明提供:式(2)所示的氟代烷烃的制造方法:R 2 -F,其中,碳原子数3〜5的醇通过式(1)所示的氟化剂进行氟化,R 1 SO 2 F 不存在溶剂,并且在选自脒碱和磷腈碱的碱存在下; 从由下式(5)表示的脒基 - 磺酸盐配合物中分离和回收脒碱的方法:所述方法包括:步骤(I):将碱性水溶液加入到通过将脒基 - 磺酸盐络合物在芳烃中沉淀磺酸碱金属盐; 向工序(I)中得到的具有磺酸碱金属盐沉淀物的溶液中添加水以溶解磺酸碱金属盐,将溶解有磺酸碱金属盐的水层与层 的含脒碱的芳族烃溶液,并除去溶解有磺酸碱金属盐的水层; 和从步骤(II)中获得的含脒碱的芳烃溶液中蒸馏出芳烃的步骤(III); 以及使用回收的脒碱的方法。 (式中,R 1表示甲基,乙基或芳香族基团,R 2表示碳原子数3〜5的烷基,n为0或2)。
摘要:
Provided are methods for producing fluorinated organic compounds, which preferably comprises converting at least one compound of formula (I) CH 2 XCHZCF 3 to at least one compound of formula (II) CHX=CZCF 3 where X and Z are independently H or F, with the proviso that X and Z are not the same. The converting step comprises catalytically reacting at least one compound of formula (I), preferably via dehydrogenation or oxidative dehydrogenation. In another aspect, the inventive method of preparing fluorinated organic compounds comprises converting a reaction stream comprising at least one pentafluoropropene to a product stream comprising at least one pentafluoropropane and at least one compound of formula (I), separating out the compound of formula (I) from the product stream, and converting the compound of formula (I) separated from the product stream to at least one compound of formula (II), wherein the conversion the compound of formula (I) to 3,3,3-trifluoropropene is substantially limited.