甲酐 的英文怎麼說
中文拼音 [jiǎgān]
甲酐
英文
formic anhydride-
Horizontal road marking. markings applied on the roads. phtalic anhydrid determination
路面水平標記.馬路標記.鄰笨二甲酸酐的定量測定Suitable anhydrides for use in this process include phthalic, maleic, and succinic.
適用於本法的酸酐有苯二甲酸，馬來酸及琥珀酸的酸酐。Preparation of isomerized methyl tetrahydrophthalic anhydride
異構化甲基四氫苯酐的研製Health standard for phthalic anhydride in the air of workplace
車間空氣中鄰苯二甲酸酐衛生標準Separately, tma can be used as the cross linking agent to make the polyester resin and epoxy resin for the making of thermoset powder coatings, binding agent, and intermedium of dyestuff, medicine, and resin. moreover, tma can be used to make polyester imido coatings which care special insulated paints for motors
另外，偏酐還可以作熱固性粉末塗料聚脂樹脂和環氧樹脂的交聯劑，可用於分散性氨基甲酸乙脂聚脂中，使其在環境溫度為70時，性質穩定，並具有高光澤度快乾耐磨等多種特性。A new process of synthesis of chromium - 2 - picolinate by chromic anhydride oxidation
鉻酐氧化連續生產吡啶甲酸鉻新工藝Tao feng changzhou chemical company located in the jiangsu international plastics city, is in changzhou city, the river additives ltd. and jurong city tao reagent production plant product sales window, the major products : toluene, pure benzene, xylene, n - octanol, ethyl acetate, acetic acid small fat, silicone oil, aniline, poly - succinimide, benzene triazole derivatives, isopropanolamine, ethanolamine, alkylation two aniline, scale inhibitor, promoting agents, antioxidants, ppd, defoamer, metal deactivator, hx - 3308 scale and corrosion inhibitor, hx03 - 12 diesel flow improver, parathion octyl - zinc chloride bridge acid, chlorine bridge anhydride, chlorobenzene, double - dicyclopentadiene, norbornene anhydride
常州濤峰化工有限公司座落在江蘇國際塑化城，是常州市夏溪助劑有限公司和句容市龍濤試劑廠生產的產品的銷售窗口，主要經營產品：甲苯、純苯、二甲苯、辛醇、乙酸乙脂、乙酸丁脂、硅油、二苯胺、雙聚丁二酰亞胺、苯三唑衍生物、異丙醇胺、乙醇胺、烷基二苯胺、防垢劑、促進劑、抗氧劑、降凝劑、消泡劑、金屬鈍化劑、 hx - 3308阻垢緩蝕劑、 hx03 - 12柴油流動改進劑、硫磷丁辛基鋅鹽、氯橋酸、氯橋酸酐、氯苯、雙聚環戊二烯、降冰片烯二酸酐等。In order to find replacer for metronidazole and drug selection. some diesters or esters of acids containing nitrogen with metronidazole were designed and synthesized, which have difference in water - solubility. metronidazole was reacted with the corresponding amino or imino multi - carboxylic acid compounds in the presence of acetic anhydride or thionyl chloride or dcc. the intermediate of nitrilotriacetic acid with ac
為尋找羥乙基甲硝唑的替代物，分別採用酸酐法酰氯法或dcc法，將氨基羧酸與羥乙基甲硝唑反應，得到5個親水性不同的單酯或二酯，用ms譜確證了次氨基三乙酸與乙酸酐反應的中間物，並對得到的酯的Acylation activity of hydroxyl groups in methyl cholicate has been determined by the use of methacryloyl chloride, methacryloyl anhydride and methacrylic acid as the acylating agents
以甲基丙烯酰氯、甲基丙烯酸酐和甲基丙烯酸作酰化劑，研究了膽酸甲酯分子中羥基的反應活性。Chemical reagent. o - phthalic anhydride
化學試劑.鄰苯二甲酸酐Effects on properties of nr / sbr / pa66 compound of modified rubber such as enr - 50, mg49, epdm - g - mah and nr - g - mah were investigated, besides utilizing pretreated short fiber and adhesive agents, so as to improve the adhesion on the surface between rubber and short pa66 fiber. first, mah grafted nr was made by myself using brabender plasticord from south china university of technology, while other modified rubber was procured from certain organizations
重點研究了環氧化天然橡膠（ enr - 50 ） 、甲基丙烯酸甲酯接枝天然橡膠（ mg49 ） 、三元乙丙橡膠接枝馬來酸酐（ epdm - g - mah ）及順酐化天然橡膠（ nr - g - mah ）等改性橡膠對sfrc性能的影響。The effect of the catalysts, e. g., concd. sulfuric acid, p - toluenesulfonic acid, dodecylbenzenesul - fonic acid on the esterification of starch was studied with cassava starch as the raw material, acetic anhydride as the esterifying agent and acetic acid as the dispersion medium
摘要以木薯澱粉為原料，用醋酸酐為酯化劑，以乙酸為分散遞質，探索了以濃硫酸、對甲基苯磺酸、十二烷基苯磺酸為催化劑對澱粉醋酯化反應的影響。Acetylation between alcohol and benzoyl oxide was carried out using znbr2 as a lewis acid catalyst in solvent - free condition. some structures were characterized by nmr and ir
以溴化鋅為催化劑，在無溶劑條件下實現了醇與苯甲酸酐的酰化反應，部分產物經nmr和ir表徵。We have found these bands in benzoylbenzoate to occur at 1789 cm－1 and 1727 cm－1.
我們發現苯甲酐的這些譜帶在1789厘米1（559微米）和1727厘米1（579微米）。The influence of reaction time, reaction temperature and acetic anhydride volume on the degree of acetylation is discussed
介紹了在用乙酸酐處理甲殼胺纖維制備再生甲殼素纖維過程中，反應溫度、乙酰酐用量對乙酰化的影響。A process approaching 3 - and 4 - chlorophthalic anhydride in high purity via chloriation of o - xylene, oxidation of monochloro - o - xylene by air in gas phase, and separation of 3 - and 4 - chlorophthalic anhydride afterwards by distillation is described
摘要介紹由鄰二甲苯氯代，再經空氣氧化及異構體分離合成氯代苯酐中試規模的合成路線。Sampling and handling naphthalene, maleic anhydride and phthalic anhydride
萘，順丁烯二酐，苯三甲酸酐的抽樣和處置方法Abstract : an imidazole - catalyzed acylation method of phthalic anhydride is applied to the determination of hydroxyl values of reinforcing agent is211. the analytical error is 5. 0 10 - 3. the relative standard deviation of the method is less than 0. 04 and its coefficient of variation is not more than 5. 0 10 - 3. hydroxyl values determined in different batch samples meet the design requirement completely. this method is rapid and simple, it is adaptable to conventional analysis
文摘:以咪唑催化鄰苯二甲酸酐酰化的方法測定增強劑is211的羥值，準確度高，分析誤差為5 . 0 10 - 3 ；方法精密度好，標準偏差小於0 . 4 ，變異系數不大於5 . 0 10 - 3 ，測定不同批號試樣的羥值完全符合商標值，方法快速、簡便，適用於常規分析。Hydroxyquinol triacetate was prepared from p - benzoquinone by 1, 4 - addition reaction with acetic anhydride and then 6, 7 - dihydroxy coumarin was synthesized from it by hydrolyze and cyclization in concentrated sulfuric acid. then 6, 7 - dimethoxy coumarin was synthesized by methylating from 6, 7 - dihydroxy coumarin with an overall yield of 74. 4 %. the procedure was practical. its structure was confirmed by ir and 1hnmr
對苯醌與乙酸酐經1 ， 4 -加成生成1 ， 2 ， 4 -苯三酚三乙酸酯，然後與蘋果酸反應經水解、環合反應得6 ， 7 -二羥基香豆素，再經甲基化得到6 ， 7 -二甲氧基香豆素，總收率為74 . 4 % ，整個過程反應條件溫和，操作方便，適合工業生產的要求，對產品結構進行了ir和1hnmr表徵。A mixture of formic acid and acetic anhydride was found to be effective for the formation of an oxazolone, which was converted to an active ester in situ in the presence of a phenol or an n - hydroxide
實驗發現甲酸和醋酐混合物對惡唑酮的生成非常有效，惡唑酮在苯酚或n -氫氧化物存在的條件下在原位轉化為酯。分享友人