摘要:
The present invention relates to a method of removing bisfluoromethyl ether contained in fluoromethyl-1,1,1,3,3,3-hexafluoroisopropyl ether in a simple, effective manner, and is characterized in that fluoromethyl-1,1,1,3,3,3-hexafluoroisopropyl ether containing bisfluoromethyl ether is brought into contact with zeolite.
摘要:
The present invention relates to an anesthetic composition containing a fluoroether compound and a physiologically acceptable Lewis acid inhibitor. This composition exhibits improved stability and does not readily degrade in the presence of a Lewis acid.
摘要:
The present invention relates to an anesthetic composition containing a fluoroether compound and a physiologically acceptable Lewis acid inhibitor. This composition exhibits improved stability and does not readily degrade in the presence of a Lewis acid.
摘要:
The present invention relates to an anesthetic composition containing a fluoroether compound and a physiologically acceptable Lewis acid inhibitor. This composition exhibits improved stability and does not readily degrade in the presence of a Lewis acid.
摘要:
The present invention relates to an anesthetic composition containing a fluoroether compound and a physiologically acceptable Lewis acid inhibitor. This composition exhibits improved stability and does not readily degrade in the presence of a Lewis acid.
摘要:
The present invention relates to an anesthetic composition containing a fluoroether compound and a physiologically acceptable Lewis acid inhibitor. This composition exhibits improved stability and does not readily degrade in the presence of a Lewis acid.
摘要:
It is possible to obtain fluoromethyl-1,1,1,3,3,3-hexafluoroisopropyl ether which has a high purity and in which an impurity making the purification by distillation difficult has been removed, by contacting a crude fluoromethyl-1,1,1,3,3,3-hexafluoroisopropyl ether with a Bronsted acid(s), a Lewis acid(s) or an acid(s) fixed to a resin or the like.
摘要:
The present invention provides a novel method of producing fluoromethyl 1,1,1,3,3,3-hexafluoroisopropyl ether. It is a method of producing fluoromethyl 1,1,1,3,3,3-hexafluoroisopropyl ether by bringing a polyether represented by the following general formula (1) into contact with a medium comprising hydrogen fluoride and an accelerant, R.sup.1 O(CH.sub.2 O).sub.n R.sup.2 ( 1) where R.sup.1 and R.sup.2 are independently hydrogen, C.sub.1 -C.sup.10 alkyl or haloalkyl groups, where halogen is fluorine, chlorine or bromine, n is an integer of from 1 to 10, and both of R.sup.1 and R.sup.2 are not hydrogen at the same time.
摘要:
The present invention provides a method of purifying fluoromethyl-1,1,1,3,3,3-hexafluoroisopropyl ether by adding a compound selected from hydroxides of, hydrogenphosphates of, phosphates of, hydrogencarbonates of, borates of or sulfites of alkali metals, or alkali metal salts of acetic acid or of phthalic acid, or boric acid to fluoromethyl-1,1,1,3,3,3-hexafluoroisopropyl ether, add then by distillation. It is possible to effectively suppress the decomposition, at the time of distillation, of fluoromethyl-1,1,1,3,3,3-hexafluoroisopropyl ether that is used as a pharmaceutical and particularly as an inhalation anesthetic and thus to obtain fluoromethyl-1,1,1,3,3,3-hexafluoroisopropyl ether of high purity.
摘要:
The present invention provides a method in which organic matter in the product accompanied with a non-reacted hydrogen fluoride can be handled without damaging the apparatus, using a cross-linked cyanopropylmethylphenylsilicone capillary column with which impurities of very small amounts can be separated, and with which non-reacted raw materials and by-products, which have a wide range of boiling points can be quantitated. The present invention further provides a process control method of a production method of fluoromethyl-1,1,1,3,3,3 -hexafluoroisopropyl ether, which is characterized in that the content of a particular component in one of the following steps is determined and in that, assuming this as a variable, the treatment condition of the step is adjusted: 1) a step of reacting together 1,1,1,3,3,3 -hexafluoroisopropyl alcohol, (para) formaldehyde, and hydrogen fluoride in the presence of sulfuric acid; 2) a step of contacting a crude fluoromethyl-1,1,1,3,3,3 -hexafluoroisopropyl ether with an alkali aqueous solution and/or water; and 3) a step of distilling crude fluoromethyl-1,1,1,3,3,3 -hexaflouroisopropyl ether