아세트산 메틸

아세트산 메틸 속성

아세트산 메틸 C화학적 특성, 용도, 생산

용도

메틸 아세테이트의 주요 용도는 래커 (lacquer)와 같은 속건성 도료의 용제입니다. 그것은 또한 셀룰로오스 접착제, 향수의 제조 및 염료 제조에서의 관계형 용매로서 용매로 사용됩니다. 이 제품의 주요 사용자 최종 시장은 페인트, 코팅, 화장품, 섬유 및 모터 산업입니다.

포장, 보관 및 운송

저장은 일반적으로 산화제가 함유되지 않은 시원하고 건조하며 통풍이 잘되는 시설에 보관됩니다. 메틸 아세테이트는 직사 광선, 열 및 화염에 노출되지 않도록하십시오.

개요

Methyl acetate, also known as MeOAc , acetic acid methyl ester or methyl ethanoate, is a carboxylate ester with the formula CH3COOCH3. It is a flammable liquid with a characteristically pleasant smell reminiscent of some glues and nail polish removers. Methyl acetate is occasionally used as a solvent, being weakly polar and lipophilic, but its close relative ethyl acetate is a more common solvent being less toxic and less soluble in water. Methyl acetate has a solubility of 25% in water at room temperature. At elevated temperature its solubility in water is much higher. Methyl acetate is not stable in the presence of strong aqueous bases or aqueous acids. Methyl acetate is VOC exempt.

화학적 성질

Methyl acetate has a pleasant, fruity odor and slightly bitter flavor. May be prepared by boiling acetic acid and methanol in the presence of acid catalysts; or by heating methanol with an excess carbon monoxide under pressure in the presence of a catalyst (phosphoric acid, cobalt salts).
Methyl acetate occurs naturally in low concentrations in mint, fungus,grapes, banana, coffee (Furia and Bellanca, 1975) and is a volatile constituent of nectarines (Takeoka et al., 1988). It is also present in some distilled alcoholic beverages (Shimoda et al., 1993). It is produced industrially via the carbonylation of methanol as a byproduct of acetic acid production or by esterification of acetic acid with methanol in the presence of strong acid such as sulfuric acid.

물리적 성질

Colorless liquid with a pleasant odor. An odor threshold concentration of 48 ppb_v was reported by Nagata and Takeuchi (1990). Cometto-Mu?iz and Cain (1991) reported an average nasal pungency threshold concentration of 112,500 ppm_v.

출처

Reported found in apple, banana, sweet and sour cherry, tangerine juice, black currants, guava, grapes, melon, peach, pear, pineapple, strawberry, cabbage, tomato, clove bud, peppermint oil, vinegar, bread, cheeses, butter, yogurt, beef, beer, cognac, rum, whiskies, cider, sherry, grape wines, cocoa, coffee, filbert, peanut, honey, soybean, olive, passion fruit, fruit brandies, fig, gin, kiwifruit, clary sage, arrack and nectarine.

용도

Methyl acetate is used as a solvent forlacquers, resins, oils, and nitrocellulose; inpaint removers; as a flavoring agent; and inthe manufacture of artificial leather.

제조 방법

Methyl acetate is produced industrially via the carbonylation of methanol as a byproduct of the production of acetic acid.Methyl acetate also arises by esterification of acetic acid with methanol in the presence of strong acids such as sulfuric acid, this production process is famous because of Eastman Kodak's intensified process using a reactive distillation.
2–1-Reactions
In the presence of strong bases such as sodium hydroxide or strong acids such as hydrochloric acid or sulfuric acid it is hydrolyzed back into methanol and acetic acid, especially at elevated temperature. The conversion of methyl acetate back into its components, by an acid , is a first-order reaction with respect to the ester. The reaction of methyl acetate and a base, for example sodium hydroxide, is a second-order reaction with respect to both reactants.
3-Applications
A major use of methyl acetate is as a volatile low toxicity solvent in glues, paints, and nail polish removers. Acetic anhydride is produced by carbonylation of methyl acetate in a process that was inspired by the Monsanto acetic acid synthesis.

정의

ChEBI: Methyl acetate is an acetate ester resulting from the formal condensation of acetic acid with methanol. A low-boiling (57°C) colourless, flammable liquid, it is used as a solvent for many resins and oils. It has a role as a polar aprotic solvent, a fragrance and an EC 3.4.19.3 (pyroglutamyl-peptidase I) inhibitor. It is an acetate ester, a methyl ester and a volatile organic compound.

주요 응용

Methyl acetate may be used for the preparation of fatty acid methyl esters and triacetin from rapeseed oil via non-catalytic trans-esterification reaction under super-critical conditions.
Methyl acetate may be used in the following:
As acyl acceptor in the preparation of biodiesel.
Synthesis of ethanol.
Preparation of n-butyl acetate, via transesterification reaction with n-butanol in the presence of acidic catalysts.
It may also be used as a precursor in the synthesis of the following:
acetic anhydride
methyl acrylate
vinyl acetate
ethyl amide

일반 설명

Methyl acetate appears as a clear colorless liquid with a fragrant odor. Moderately toxic. Flash point 14 °F. Vapors heavier than air.

공기와 물의 반응

Highly flammable. Water soluble.

반응 프로필

Methyl acetate presents a fire or explosion hazard when exposed to strong oxidizing agents. Emits irritating fumes and acrid smoke when heated to decomposition, [Lewis, 3rd ed., 1993, p. 826]. Methyl acetate reactivity is consistent with other compounds of the ester group.

위험도

Flammable, dangerous fire and explosion risk, explosive limits in air 3–16%. Irritant to respiratory tract. Headache, dizziness, nausea, eye damage (degeneration of ganglion cells in the retina).

건강위험

(Very similar to those of methyl alcohol, which constitutes 20% of commercial grade.) Inhalation causes headache, fatigue, and drowsiness; high concentrations can produce central nervous system depression and optic nerve damage. Liquid irritates eyes and may cause defatting and cracking of skin. Ingestion causes headache, dizziness, drowsiness, fatigue; may cause severe eye damage.

화재위험

Behavior in Fire: Vapor is heavier than air and may travel a considerable distance to a source of ignition and flash back.

Safety Profile

Moderately toxic by several routes. A human systemic irritant by inhalation. A moderate skin and eye irritant. Mutation data reported. Dangerous fire hazard when exposed to heat, flame, or oxidizers. Moderate explosion hazard when exposed to heat or flame. When heated to decomposition it emits acrid smoke and fumes. See also ESTERS.

잠재적 노출

Methyl acetate is used as a solvent in lacquers and paint removers; and as an intermediate in pharmaceutical manufacture.

환경귀착

Photolytic. A rate constant of 2.00 x 10^-13 cm³/molecule?sec was reported for the reaction of methyl acetate and OH radicals in aqueous solution (Wallington et al., 1988b).
Chemical/Physical. Slowly hydrolyzes in water yielding methyl alcohol and acetic acid (NIOSH, 1997). The estimated hydrolysis half-life in water at 25 °C and pH 7 is 2.5 yr (Mabey and Mill, 1978).
At an influent concentration of 1,030 mg/L, treatment with GAC resulted in an effluent concentration of 760 mg/L. The adsorbability of the carbon used was 54 mg/g carbon (Guisti et al., 1974).

운송 방법

UN1231 Methyl acetate, Hazard Class: 3; Labels: 3-Flammable liquid.

Purification Methods

Methanol in methyl acetate can be detected by measuring its solubility in water. At 20o, the solubility of methyl acetate in water is ca 35g per 100mL, but 1% MeOH confers complete miscibility. Methanol can be removed by conversion to methyl acetate, by refluxing for 6hours with acetic anhydride (85mL/L), followed by fractional distillation. Acidic impurities can be removed by shaking with anhydrous K2CO3 and distilling. An alternative treatment is with acetyl chloride, followed by washing with concentrated NaCl and drying with CaO or MgSO4. (Solid CaCl2 cannot be used because it forms a crystalline addition compound.) Distillation from copper stearate destroys peroxides. Free alcohol or acid can be eliminated from methyl acetate by shaking with strong aqueous Na2CO3 or K2CO3 (three times), then with aqueous 50% CaCl2 (three times), saturated aqueous NaCl (twice), drying with K2CO3 and distilling it from P2O5. [Beilstein 2 IV 122.]

비 호환성

Vapor may form explosive mixture with air. A Strong reducing agent. Incompatible water, acids, nitrates, strong oxidizers; alkalis. Attacks some plastics. Attacks many metals in presence of water. Reacts slowly with water, forming acetic acid and methanol. Decomposes in heat; on contact with air, bases, strong oxidizers; UV-light; possible fire and explosion hazard

폐기물 처리

Dissolve or mix the material with a combustible solvent and burn in a chemical incinerator equipped with an afterburner and scrubber. All federal, state, and local environmental regulations must be observed.

아세트산 메틸 준비 용품 및 원자재

원자재

준비 용품

아세트산 메틸 공급 업체

공급자	전화	이메일	국가	제품 수	이점
Shandong Yanshuo Chemical Co., Ltd.	+86-18678179670 +86-18615116763	sales@yanshuochem.com	China	101	58
ShanDong Look Chemical Co.,Ltd.	+8617653113219	sales01@sdlookchemical.com	China	2739	58
Shaanxi Didu New Materials Co. Ltd	+86-89586680 +86-13289823923	1026@dideu.com	China	9116	58
Hebei Duling International Trade Co. LTD	+8618032673083	sales05@hbduling.cn	China	15745	58
Hebei Guanlang Biotechnology Co,.LTD	+8619930503252	daisy@crovellbio.com	China	5964	58
PT CHEM GROUP LIMITED	+86-85511178 +86-85511178	peter68@ptchemgroup.com	China	35453	58
Wuhan Quanjinci New Material Co.,Ltd.	+8615271838296	kyra@quanjinci.com	China	1532	58
Hebei Mojin Biotechnology Co., Ltd	+8613288715578	sales@hbmojin.com	China	12456	58
Yujiang Chemical (Shandong) Co.,Ltd.	+86-17736087130 +86-18633844644	catherine@yjchem.com.cn	China	147	58
Henan Tianfu Chemical Co.,Ltd.	+86-0371-55170693 +86-19937530512	info@tianfuchem.com	China	21691	55

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