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    • 31. 发明授权
    • Production of anhydrous or substantially anhydrous formic acid
    • 生产无水或基本无水的甲酸
    • US4326073A
    • 1982-04-20
    • US131501
    • 1980-03-18
    • Dieter WolfRudolf SchmidtUlrich BlockHartmut SchoenmakersKaspar BottGerd Kaibel
    • Dieter WolfRudolf SchmidtUlrich BlockHartmut SchoenmakersKaspar BottGerd Kaibel
    • C07C53/02C07C27/02C07C51/00C07C51/09C07C51/44C07C51/48C07C67/00
    • C07C51/09C07C51/48
    • Anhydrous or substantially anhydrous formic acid is obtained by hydrolysis of methyl formate, in a process wherein(a) methyl formate is hydrolyzed,(b) the methanol and excess methyl formate are distilled from the hydrolysis mixture obtained,(c) the bottom product of distillation (b), consisting of formic acid and water, is extracted, in a liquid-liquid extraction, with an extractant which in the main takes up the formic acid,(d) the resulting extract phase, consisting of formic acid, the extractant and a part of the water, is subjected to distillation,(e) the top product obtained from this distillation and consisting of all or part of the water introduced into the distillation, and part of the formic acid, is recycled, as vapor, into the lower part of the distillation column of stage (b),(f) the bottom product of distillation stage (d), consisting of the extractant, with or without part of the water, and the greater part of the formic acid, is separated by distillation into anhydrous or substantially anhydrous formic acid and the extractant, and(g) the extractant leaving stage (f) is recycled to the process.
    • 在(a)甲酸甲酯水解的过程中,(甲)甲醇和过量的甲酸甲酯从得到的水解混合物中蒸馏得到,(c)甲酸叔丁酯的底部产物 蒸馏(b)由甲酸和水组成,在液 - 液萃取中用主要萃取甲酸的萃取剂萃取,(d)所得提取相由甲酸,萃取剂 和一部分水进行蒸馏,(e)由该蒸馏获得的顶部产物,并且由引入蒸馏的全部或部分水和部分甲酸作为蒸气循环进入 阶段(b)的蒸馏塔的下部,(f)蒸馏阶段(d)的底部产物,由萃取剂组成,有或没有部分水和大部分甲酸分离 通过蒸馏成无水 粗粉或基本上无水的甲酸和萃取剂,和(g)离开阶段(f)的萃取剂再循环到该方法中。
    • 35. 发明授权
    • Preparation of carbonyl halides
    • 制备羰基卤化物
    • US5175364A
    • 1992-12-29
    • US707840
    • 1991-05-30
    • Kaspar Bott
    • Kaspar Bott
    • C07C51/58
    • C07C51/58
    • Carbonyl halides I ##STR1## where R.sup.1 is H, alkyl, cycloalkyl, haloalkyl or halocycloalkyl, R.sup.2 and R.sup.3 are each alkyl, cycloalkyl, haloalkyl or halocycloalkyl and may furthermore be bonded to one another to form a 5-membered to 7-membered ring andX is halogen,are prepared by reacting an alkyl halide II ##STR2## with carbon monoxide under superatmospheric pressure in the presence of a catalytic amount ofa) aluminum bromide and in the presence or absence of a solvent orb) aluminum chloride or bromide and in the presence of a halohydrocarbon and a carbonyl halide of the formula IIIR.sup.4 --CH.sub.2 --CO--Hal III, where R.sup.4 is hydrogen or C.sub.1 -C.sub.4 -alkyl and Hal is halogen.
    • 羰基卤化物I,其中R 1是H,烷基,环烷基,卤代烷基或卤代环烷基,R 2和R 3各自是烷基,环烷基,卤代烷基或卤代环烷基,并且还可以彼此键合形成5元至7元 环和X是卤素,通过烷基卤化物II II与一氧化碳在超大气压下在催化量的溴化铝存在下和在存在或不存在溶剂的情况下反应制备,或b)氯化铝 或溴化物存在下,并且在式III R 4 -CH 2 -CO-Hal III的卤代烃和羰基卤存在下,其中R 4是氢或C 1 -C 4 - 烷基,而Hal是卤素。
    • 37. 发明授权
    • Continuous preparation of acetic acid esters
    • 连续制备乙酸酯
    • US4370491A
    • 1983-01-25
    • US263470
    • 1981-05-14
    • Kaspar BottGerd KaibelHerwig HoffmannRudolf IrnichEberhard Schaefer
    • Kaspar BottGerd KaibelHerwig HoffmannRudolf IrnichEberhard Schaefer
    • C07C67/03B01D3/36C07C67/02C07C69/14C07C67/06
    • C07C67/03Y10S203/06
    • A process for the preparation of acetic acid esters CH.sub.3 --CO--O--R.sup.1 (I, R.sup.1 =an organic radical other than methyl and ethyl) by alkali-catalyzed trans-esterification of an acetic acid ester CH.sub.3 --CO--O--R.sup.2 (II, R.sup.2 =methyl or ethyl) with an alcohol R.sup.1 --OH (III), accompanied by elimination of the alcohol R.sup.2 --OH (IV), wherein(a) the trans-esterification reaction is carried out in the middle section K.sub.M of a distillation column K, the alcohol III being fed as liquid into the upper zone and the ester II into the lower zone of K.sub.M,(b) the alkaline catalyst is introduced into the upper part K.sub.U of K,(c) the alcohol IV, or a mixture of IV and the ester II, is taken off the top of the column,(d) the mixture obtained from (c) (unless the alcohol IV alone is obtained) is separated in the column section K.sub.U or in a stripper column K.sub.S into IV and the azeotrope of II and IV, and the latter is recycled to the lower zone of K.sub.M,(e) the ester I is taken as vapor or liquid from the lower zone of the lower section K.sub.L of K and(f) the catalyst is either removed, or recycled to K.sub.U, in a conventional manner.
    • 通过乙酸酯CH3-CO-O-R2的碱催化反式酯化制备乙酸酯CH 3 -CO-O-R 1(I,R 1 =甲基和乙基以外的有机基)的方法 II,R 2 =甲基或乙基)与醇R 1 -OH(III)反应,同时除去醇R 2 -OH(Ⅳ),其中(a)酯交换反应在 蒸馏塔K,醇III作为液体进料到上部区域,酯II进入KM的下部区域,(b)将碱性催化剂引入K的上部KU,(c)醇IV,或 将IV和酯II的混合物从柱顶部取出,(d)从(c)获得的混合物(除非单独获得醇IV)在柱部分KU或汽提塔KS中分离 进入IV和II和IV的共沸物,后者再循环到KM的下部区域,(e)将酯I作为蒸汽或液体从下部KL的下部区域中取出 的K和(f)催化剂以常规方式被去除或再循环至KU。