JPS6224478B2 - - Google Patents
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- Publication number
- JPS6224478B2 JPS6224478B2 JP53131324A JP13132478A JPS6224478B2 JP S6224478 B2 JPS6224478 B2 JP S6224478B2 JP 53131324 A JP53131324 A JP 53131324A JP 13132478 A JP13132478 A JP 13132478A JP S6224478 B2 JPS6224478 B2 JP S6224478B2
- Authority
- JP
- Japan
- Prior art keywords
- odor
- gas
- odorant
- present
- parts
- 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
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
本発明は微量で有効なL.P.G.や都市ガスなどの
燃料ガス用付臭剤に関するものである。
従来これらの燃料ガスは、ガス漏れによる引火
爆発、ガス中毒の危険を防止するために特有な臭
気物質が添加されている。一般に着臭の為に添加
される物質のそなえる条件としては、心理的に不
安、警戒を感じさせる臭質であること、稀薄濃度
で感知できること、安定な物質であつて臭気が消
失または変化しないこと、金属、パツキング、ダ
イアフラム等に対し腐食性のないこと、又、使用
濃度では人体に無害であることが要求される。か
かる目的にそう化合物を鋭意検討した結果ビスア
ルキルメルカプト化合物R1−Ｓ−R2−Ｓ−R3
〔ただしR1、R3は炭素数１から４までの炭化水素
基、R2は−（CH2）o−（ただしｎは１から４までの
整数を示す）、
The present invention relates to an odorant for fuel gases such as LPG and city gas that is effective in small amounts. Conventionally, specific odorous substances have been added to these fuel gases in order to prevent the risk of ignition and explosion due to gas leakage and gas poisoning. In general, substances added for odor must have an odor that causes psychological anxiety and alarm, be detectable at dilute concentrations, and be a stable substance so that the odor does not disappear or change. It is required that it is not corrosive to metals, packing, diaphragms, etc., and that it is harmless to the human body at the concentration used. As a result of intensive study of compounds for this purpose, a bisalkylmercapto compound R 1 -S-R 2 -S-R 3
[However, R 1 and R 3 are hydrocarbon groups having from 1 to 4 carbon atoms, R 2 is -(CH 2 ) o - (however, n represents an integer from 1 to 4),
【式】−CH2−CH＝
CH−CH2−を示す〕を単独又は有効成分として
含有する組成物がガス付臭剤に使用して前述付臭
剤としてそなえるべき条件を満足し、極めて付臭
効果の大なることを確認し本発明に到達した。臭
気強度の試験に当つては無臭室法によりおこなつ
た。臭気強度の測定は６名の十分に訓練されたパ
ネルにより行い、試験には表(1)に示す６段階表示
法を用いた。[Formula] -CH 2 -CH= CH-CH 2 - The present invention was achieved after confirming that the odor effect was great. The odor intensity test was conducted using the odorless room method. The odor intensity was measured by a panel of 6 well-trained people, and the 6-level display method shown in Table (1) was used for the test.
【表】
図は無臭室中の付臭剤濃度（空気１m3当りの化
合物のmg数）の対数値に対する６名のパネルの臭
気強度の平均値の関係を示したものである。
(A)は本発明に係る化合物
１・２−ビスメチルメルカプトエタン
(B)は本発明に係る化合物
１・４−ビスメチルメルカプト−２−ブテン
(C)は一般的付臭剤 ジメチルスルフイド
の無臭室内での濃度変化と臭気強度の関係を示
す。
図に示すように本発明のビスアルキルメルカプ
ト化合物の認知濃度は10γ／m3以下で従来付臭剤
として使用されていたメルカプタン類に比べてき
わめて低濃度で付臭効果が大きいものである。
すなわち、本発明の付臭剤を天然ガス又は都市
ガス用付臭剤として使用する場合はガス１m3に対
し約５〜10mg。L.P.G.用付臭剤として使用する場
合はL.P.G.1Kgに対し約20〜30mg添加すればガス
は充分に付臭され、ガス漏れした場合、直ちに感
知できる警戒臭を与えることができる。又本発明
の付臭剤は金属、ダイアフラム等に対する腐食性
もなく、熱、酸化反応等に対して著しく安定であ
るという特徴を有する。
以下にその実施例を示すが、本発明は実施例に
のみ限定されるものではない。
実施例 １
重量比で１・２−ビスメチルメルカプトプロパ
ン50部に対し溶媒としてｎ−ヘキサン50部を使用
混合撹拌して製品とする。ついでこの製品をL.P.
G.1Kgに対し0.02ｇの割合で添加した。このガス
を空気で200倍に希釈した状態で臭気試験を行つ
たところ強いガス臭を感じた。
実施例 ２
重量比で１・２−ビスメチルメルカプトエタン
30部、テトラヒドロテオフエン20部、ｎ−ヘキサ
ン50部を使用撹拌して製品とする。ついでこの製
品をL.P.G.1Kgに対し0.03ｇの割合で添加した。
このガスを空気で200倍に希釈した状態で臭気試
験をおこなつたところ強いガス臭を感じた。
実施例 ３
重量比で１・４−ビスメチルメルカプト−２−
ブテン30部、ジメチルサルフアイド10部、テトラ
ヒドロチオフエン10部、ｎ−ヘキサン50部を使用
混合撹拌して製品とする。ついでこの製品をL.P.
G.1Kgに対し0.03ｇの割合で添加した。このガス
を空気200倍に希釈した状態で臭気試験をおこな
つたところ強いガス臭を示した。[Table] The figure shows the relationship between the average odor intensity of a panel of six people and the logarithm of the odorant concentration (mg of compound per 1 m 3 of air) in an odor-free room. (A) is a compound according to the present invention 1,2-bismethylmercaptoethane (B) is a compound according to the present invention 1,4-bismethylmercapto-2-butene (C) is a general odorant Dimethyl sulfide This figure shows the relationship between concentration changes in an odor-free room and odor intensity. As shown in the figure, the perceived concentration of the bisalkylmercapto compound of the present invention is 10 γ/m 3 or less, which is extremely low concentration and has a large odor effect compared to mercaptans conventionally used as odorants. That is, when the odorant of the present invention is used as an odorant for natural gas or city gas, the amount is about 5 to 10 mg per 1 m 3 of gas. When used as an odorant for LPG, adding about 20 to 30 mg to 1 kg of LPG will sufficiently odorize the gas, and in the event of a gas leak, it will give a warning odor that can be detected immediately. Further, the odorant of the present invention has the characteristics that it is not corrosive to metals, diaphragms, etc., and is extremely stable against heat, oxidation reactions, etc. Examples are shown below, but the present invention is not limited only to the examples. Example 1 50 parts of n-hexane was used as a solvent to 50 parts of 1,2-bismethylmercaptopropane in a weight ratio, and the mixture was mixed and stirred to obtain a product. Then LP this product
It was added at a rate of 0.02g per 1Kg of G. When this gas was diluted 200 times with air and an odor test was conducted, a strong gas odor was detected. Example 2 1,2-bismethylmercaptoethane by weight
30 parts of tetrahydrotheophene and 50 parts of n-hexane were used and stirred to obtain a product. This product was then added at a ratio of 0.03g to 1Kg of LPG.
When we conducted an odor test with this gas diluted 200 times with air, we detected a strong gas odor. Example 3 Weight ratio of 1,4-bismethylmercapto-2-
30 parts of butene, 10 parts of dimethyl sulfide, 10 parts of tetrahydrothiophene, and 50 parts of n-hexane are mixed and stirred to obtain a product. Then LP this product
It was added at a rate of 0.03g per 1Kg of G. When an odor test was conducted with this gas diluted 200 times as much as air, it exhibited a strong gas odor.
図は本発明の実施例に於ける付臭剤及び公知の
一般的付臭剤とを対比した付臭剤濃度と臭気強度
の関係を表わすグラフである。
The figure is a graph showing the relationship between odorant concentration and odor intensity, comparing the odorant in the example of the present invention and a known general odorant.
Claims (1)
は炭素数１から４までの炭化水素基、R2は−
（CH2）o−（ただしｎは１から４までの整数を示
す）、【式】−CH2−CH＝CH−CH2 −を示す〕を単独あるいは任意の混合物として有
する燃料ガス用付臭剤。[Claims] 1 Compound R 1 -S-R 2 -S-R 3 [However, R 1 , R 3
is a hydrocarbon group having 1 to 4 carbon atoms, R 2 is −
(CH 2 ) o - (where n is an integer from 1 to 4), [Formula] -CH 2 -CH=CH-CH 2 -], either alone or in any mixture, for fuel gas. agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13132478A JPS5558294A (en) | 1978-10-25 | 1978-10-25 | Odorant for fuel gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13132478A JPS5558294A (en) | 1978-10-25 | 1978-10-25 | Odorant for fuel gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5558294A JPS5558294A (en) | 1980-04-30 |
| JPS6224478B2 true JPS6224478B2 (en) | 1987-05-28 |
Family
ID=15055282
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13132478A Granted JPS5558294A (en) | 1978-10-25 | 1978-10-25 | Odorant for fuel gas |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5558294A (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5123502A (en) * | 1974-08-21 | 1976-02-25 | Bridgestone Liquefied Gas Co | NENRYOGASUYO FUSHUZAI |
-
1978
- 1978-10-25 JP JP13132478A patent/JPS5558294A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5558294A (en) | 1980-04-30 |
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