JPH0720902B2 - Method for separating dimethyl sulfoxide and iodine - Google Patents

Method for separating dimethyl sulfoxide and iodine

Info

Publication number
JPH0720902B2
JPH0720902B2 JP10752587A JP10752587A JPH0720902B2 JP H0720902 B2 JPH0720902 B2 JP H0720902B2 JP 10752587 A JP10752587 A JP 10752587A JP 10752587 A JP10752587 A JP 10752587A JP H0720902 B2 JPH0720902 B2 JP H0720902B2
Authority
JP
Japan
Prior art keywords
iodine
dimethyl sulfoxide
dmso
composition containing
water
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP10752587A
Other languages
Japanese (ja)
Other versions
JPS63270659A (en
Inventor
吉雄 網本
力 吉田
治 山本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daikin Industries Ltd
Original Assignee
Daikin Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Daikin Industries Ltd filed Critical Daikin Industries Ltd
Priority to JP10752587A priority Critical patent/JPH0720902B2/en
Publication of JPS63270659A publication Critical patent/JPS63270659A/en
Publication of JPH0720902B2 publication Critical patent/JPH0720902B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、ジメチルスルホキシドおよびヨウ素を含有す
る組成物においてジメチルスルホキシドとヨウ素とを分
離する方法に関する。
TECHNICAL FIELD The present invention relates to a method for separating dimethyl sulfoxide and iodine in a composition containing dimethyl sulfoxide and iodine.

(従来技術) ジメチルスルホキシド(以下、DMSOと呼ぶことがあ
る。)(沸点:189℃)とヨウ素(I2)(沸点:185℃)と
は沸点が相互に近似しているので単なる蒸留ではこれら
両者の分離はきわめて困難である。
(Prior Art) Since dimethyl sulfoxide (hereinafter sometimes referred to as DMSO) (boiling point: 189 ° C.) and iodine (I 2 ) (boiling point: 185 ° C.) have similar boiling points, they can be simply distilled. Separation of the two is extremely difficult.

DMSOおよびヨウ素を含有する組成物としては、たとえ
ば、ヨウ化フルオロアルキルを水およびDMSOと接触させ
て脱ヨウ化水素しフルオロアルキルアルコールを製造す
る際に生成するフルオロアルキルアルコール、DMSOおよ
びヨウ化水素を含有する組成物が挙げられる。この組成
物において、時間の経過とともに I-(KI、HIなど)+CH3SOCH3→I2+CH3SCH3 の反応が生じるが、このヨウ化水素の還元反応は、定量
的に進行し、さらにヨウ素(I2)がDMSOの分解を生じさ
せる。このような組成物において、目的とするフルオロ
アルキルアルコールを水洗した場合には、DMSOとヨウ素
が水相として存在する。DMSOは、有用な物質であり、再
使用するには、ヨウ素との分離は不可欠であり、DMSOと
ヨウ素との分離技術の開発が待たれている。
As the composition containing DMSO and iodine, for example, fluoroalkyl alcohol, DMSO and hydrogen iodide produced when fluoroalkyl iodide is contacted with water and DMSO to dehydroiodine to produce fluoroalkyl alcohol are used. The composition containing it is mentioned. In this composition, the reaction of I (KI, HI, etc.) + CH 3 SOCH 3 → I 2 + CH 3 SCH 3 occurs over time, but this reduction reaction of hydrogen iodide proceeds quantitatively, and Iodine (I 2 ) causes the decomposition of DMSO. In such a composition, when the target fluoroalkyl alcohol is washed with water, DMSO and iodine are present as an aqueous phase. DMSO is a useful substance, and its separation from iodine is indispensable for reuse, and the development of a separation technique from DMSO and iodine is awaited.

(発明の目的) 本発明の目的は、ジメチルスルホキシドおよびヨウ素を
含有する組成物においてジメチルスルホキシドとヨウ素
とを分離する方法を提供することにある。
(Object of the Invention) An object of the present invention is to provide a method for separating dimethyl sulfoxide and iodine in a composition containing dimethyl sulfoxide and iodine.

(発明の構成) 本発明の要旨は、ジメチルスルホキシドおよびヨウ素を
含有する組成物を水蒸気蒸留することを特徴とする前記
組成物においてジメチルスルホキシドとヨウ素とを分離
する方法に存する。
(Structure of the Invention) The gist of the present invention resides in a method for separating dimethyl sulfoxide and iodine in the above composition, which comprises steam-distilling a composition containing dimethyl sulfoxide and iodine.

本発明においては、ヨウ素が水と共沸するが、DMSOが水
とほとんど共沸しないことを利用する。
In the present invention, it is used that iodine azeotropes with water, but DMSO hardly azeotropes with water.

水蒸気蒸留は、通常の水蒸気蒸留どおりに行え、ジメチ
ルスルホキシドおよびヨウ素を含有する組成物に水を混
合して加熱すること、または該組成物に水蒸気を吹き込
むことなどにより行える。
Steam distillation can be carried out as usual steam distillation, and can be carried out by mixing water with a composition containing dimethyl sulfoxide and iodine and heating, or by blowing steam into the composition.

水蒸気蒸留を行う圧力は特に限定されないが、ジメチル
スルホキシドの熱分解などが生じないように、圧力は低
いことが好ましい。通常0.5〜1気圧である水蒸気蒸留
を行うにあたっては、回収ヨウ素の装置への付着防止の
ために、イソプロピルアルコールなどを添加してもよ
い。
The pressure at which steam distillation is carried out is not particularly limited, but it is preferable that the pressure is low so as to prevent thermal decomposition of dimethyl sulfoxide. When performing steam distillation at a pressure of 0.5 to 1 atm, isopropyl alcohol or the like may be added to prevent the collected iodine from adhering to the apparatus.

(発明の効果) 本発明によれば、単なる蒸留ではきわめて困難であった
ヨウ素とジメチルスルホキシドとの分離が容易に行え
る。
(Effects of the Invention) According to the present invention, it is possible to easily separate iodine from dimethyl sulfoxide, which was extremely difficult by simple distillation.

例えば、ヨウ化フルオロアルキルを水およびDMSOと接触
させてフルオロアルキルアルコールを製造する場合に得
られるフルオロアルキルアルコール、DMSOおよびヨウ素
を含む組成物において、DMSOとフルオロアルキルアルコ
ールおよびヨウ素との分離が容易に行えるので、DMSOは
有効に再利用できる。
For example, in a composition containing a fluoroalkyl alcohol, DMSO and iodine obtained when a fluoroalkyl iodide is contacted with water and DMSO to produce a fluoroalkyl alcohol, it is easy to separate DMSO from the fluoroalkyl alcohol and iodine. Yes, DMSO can be effectively reused.

(実施例) 以下に実施例を示し、本発明を具体的に説明する。(Example) An example is shown below and the present invention is explained concretely.

実施例1 原料C8F17CH2CH2I57.4g(0.1モル)、ジメチルスルホキ
シド115g及び水4gを冷却還流器および撹拌機付200mlガ
ラス製四つ口丸底フラスコに仕込み、140℃で7時間撹
拌して反応を行った。
Example 1 Raw material C 8 F 17 CH 2 CH 2 I 57.4 g (0.1 mol), dimethyl sulfoxide 115 g and water 4 g were charged into a 200 ml glass four-neck round bottom flask equipped with a cooling reflux condenser and a stirrer, and the mixture was heated at 140 ° C. The reaction was carried out with stirring for a time.

反応生成物を冷却還流器およびウォーターイリミネータ
ー付500mlガラス製3つ口丸底フラスコに仕込み、そこ
へ水200mlおよびイソプロピルアルコール(IPA)4gを添
加して、8時間加熱して蒸留を行なった(イリミネータ
ーは60℃にて保温した)。C8F17CH2CH2OHおよびI2を留
出物の下層である水層として分離し回収した。蒸留後、
留出物の上層を分液して釜残物に加えた。留出物(水
層)及び釜残物のそれぞれについて、 C8F17CH2CH2OH、DMSOおよびI2の量をガスクロマトグラ
フィーならびにヨウ素メトリーにより分析した。分析結
果を第1表に示す。
The reaction product was charged into a 500 ml glass three-necked round bottom flask equipped with a cooling reflux condenser and a water eliminator, 200 ml of water and 4 g of isopropyl alcohol (IPA) were added thereto, and the mixture was heated for 8 hours for distillation ( (Iliminator was kept warm at 60 ℃). C 8 F 17 CH 2 CH 2 OH and I 2 were separated and collected as a lower aqueous layer of the distillate. After distillation,
The upper layer of the distillate was separated and added to the residue in the kettle. The amount of C 8 F 17 CH 2 CH 2 OH, DMSO and I 2 was analyzed for each of the distillate (aqueous layer) and the bottoms by gas chromatography and iodometry. The analysis results are shown in Table 1.

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 FI 技術表示箇所 B01D 3/38 9153−4D C07B 63/00 A 7419−4H ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI Technical display location B01D 3/38 9153-4D C07B 63/00 A 7419-4H

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】ジメチルスルホキシドおよびヨウ素を含有
する組成物を水蒸気蒸留することを特徴とする前記組成
物においてジメチルスルホキシドとヨウ素とを分離する
方法。
1. A method for separating dimethylsulfoxide and iodine in the composition, which comprises steam-distilling a composition containing dimethylsulfoxide and iodine.
【請求項2】ジメチルスルホキシド、ヨウ素およびフル
オロアルキルアルコールを含有する組成物を水蒸気蒸留
することを特徴とする前記組成物においてジメチルスル
ホキシドとヨウ素およびフルオロアルキルアルコールと
を分離する方法。
2. A method for separating dimethyl sulfoxide from iodine and fluoroalkyl alcohol in the composition, which comprises steam-distilling a composition containing dimethyl sulfoxide, iodine and fluoroalkyl alcohol.
JP10752587A 1987-04-30 1987-04-30 Method for separating dimethyl sulfoxide and iodine Expired - Lifetime JPH0720902B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10752587A JPH0720902B2 (en) 1987-04-30 1987-04-30 Method for separating dimethyl sulfoxide and iodine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10752587A JPH0720902B2 (en) 1987-04-30 1987-04-30 Method for separating dimethyl sulfoxide and iodine

Publications (2)

Publication Number Publication Date
JPS63270659A JPS63270659A (en) 1988-11-08
JPH0720902B2 true JPH0720902B2 (en) 1995-03-08

Family

ID=14461401

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10752587A Expired - Lifetime JPH0720902B2 (en) 1987-04-30 1987-04-30 Method for separating dimethyl sulfoxide and iodine

Country Status (1)

Country Link
JP (1) JPH0720902B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014178309A1 (en) * 2013-04-30 2014-11-06 東レ・ファインケミカル株式会社 Method for purifying dimethyl sulfoxide

Also Published As

Publication number Publication date
JPS63270659A (en) 1988-11-08

Similar Documents

Publication Publication Date Title
JP4587262B2 (en) Production of formic acid
JPH07252179A (en) Preparation of acetaldehyde diethyl acetal
JPH07145242A (en) Pristine alkylsiloxanes and their production
JPH0720902B2 (en) Method for separating dimethyl sulfoxide and iodine
CA2119997C (en) Process for the manufacture of alkyl ketene dimers by dimerization with tertiary amines
CA2075622A1 (en) Azeotropic assisted transvinylation technology
JP5519017B2 (en) Method for producing aminoalkylalkoxysilane
JPH03279336A (en) Production of branched dimerized alcohol
CA2071102A1 (en) Process for the preparation of 1-alkoxy-2-dialkylaminoethanes
US4967019A (en) Method of manufacturing 2-propyn-1-ol
JP2506397B2 (en) Isobutyric acid and methacrylic acid separation method
CS236891B2 (en) Method of decomposition of compound of o-benzoyl-benzoic acid and hydrogen fluoride and boron trifluoride
JP2601701B2 (en) Method for producing long-chain alkyl polysaccharide
TW212144B (en) Process for the recovery of rhodium from residues of carbonylation reactions
Caccia et al. Synthesis of (+)-(S)-4-s. Butyl and (+)-(S)-2-Methyl-4-s. Butylpyridine
JPH07242633A (en) Production of 5-aminoethylaminomethyl-2-chloropyridine
JP2002114720A (en) Preparation of 1,1,1-trifluoropropene
HUE025953T2 (en) Separation/purification of desflurane from hydrogen fluoride
US4788342A (en) Process for preparation of 4,4,8,8,10-pentamethylbicyclo[4,4,0]-decene-(1,6)-one(2)
JPH0153263B2 (en)
JPS58162548A (en) Preparation of 3-methyl-2-cyclopentenone
JP2555172B2 (en) Method for separating 3-phenoxybenzyl 2- (4-alkoxyphenyl) -2-methylpropyl ethers
Luff et al. CC.—Organic derivatives of silicon. Part VII. The synthesis of dl-sulphobenzylethyl iso butylsilicyl oxide
JP2791572B2 (en) Macrocyclic compound and method for producing the same
JPS5842170B2 (en) Method for producing chloromethyl methyl ether by solvent extraction