公开(公告)号：US4289741A

公开(公告)日：1981-09-15

申请号：US133358

申请日：1980-03-24

申请人： Carl Voigt ,  Peter Kleinschmit ,  Eberhard Walter

发明人： Carl Voigt ,  Peter Kleinschmit ,  Eberhard Walter

IPC分类号： C01C3/02

CPC分类号： C01C3/0233

摘要： The known hydrocyanic acid-methane-ammonia (BMA) process for the production of hydrogen cyanide can now be carried out with liquified gases namely through the presence of additional hydrogen at the beginning of the reaction. The atomic ratio of carbon to nitrogen and hydrogen is from 1:1:7.1 to 1:1.33:13. As additional hydrogen there is the portion of hydrogen present coming out of the reaction "hydrocarbon+NH.sub.3 ". Otherwise the reaction conditions are the same as in the known BMA process.

摘要翻译： 用于生产氰化氢的已知氢氰酸 - 甲烷 - 氨（BMA）方法现在可以用液化气体进行，即在反应开始时通过存在另外的氢气来进行。 碳与氮和氢的原子比为1:1至7.1:1.33:1。 作为另外的氢，存在从反应“烃+ NH 3”出来的部分氢。 否则反应条件与已知的BMA方法相同。

公开(公告)号：US4180684A

公开(公告)日：1979-12-25

申请号：US759548

申请日：1977-01-14

申请人： Peter Kleinschmit ,  Eberhard Walter ,  Helmut Mechler ,  Gunter Theis ,  Brigitte Meiners

发明人： Peter Kleinschmit ,  Eberhard Walter ,  Helmut Mechler ,  Gunter Theis ,  Brigitte Meiners

IPC分类号： C07C27/00 ,  C07C37/62 ,  C07C39/367 ,  C07C67/00 ,  C07C37/00

CPC分类号： C07C37/62

摘要： 4,4'-isopropylidene-bis(2,6-dibromophenol) is produced by reacting 4,4'-isopropylidene diphenol with hydrogen bromide or a mixture of hydrogen bromide with up to an equimolar amount of free bromine in admixture with hydrogen peroxide and in the presence of water and an inert organic liquid.

摘要翻译： 4,4'-异亚丙基 - 双（2,6-二溴苯酚）是通过使4,4'-异亚丙基二酚与溴化氢或溴化氢的混合物与至多等摩尔量的游离溴与过氧化氢和 在水和惰性有机液体的存在下。

公开(公告)号：US5068463A

公开(公告)日：1991-11-26

申请号：US592473

申请日：1990-10-05

申请人： Eberhard Walter

发明人： Eberhard Walter

IPC分类号： C07C37/62 ,  C07C37/70 ,  C07C37/84 ,  C07C39/367 ,  C07C39/373

CPC分类号： C07C37/70 ,  C07C37/62 ,  C07C37/72

摘要： A process for the production of tetrabromo-4,4'-alkylidenediphenols, especially tetrabromobisphenol A (TBBA), from the corresponding alkylidenediphenols by oxidative bromination with Br.sub.2, HBr.sub.3 or HBr and aqueous hydrogen peroxide in the presence of an organic solvent. The process is characterized by washing the organic phase containing dissolved tetrabromo-4,4'-alkylidenediphenol with an aqeuous alkali sulphite solution, preferably at 50.degree. to 90.degree. C. Through this washing treatment, the tetrabromo compound is obtained in higher purity; in addition, the mother liquor can be recycled without difficulty.

摘要翻译： 通过在有机溶剂存在下用Br 2，HBr 3或HBr和过氧化氢水溶液进行氧化溴化，从相应的亚烷基二醇生产四溴-4,4'-亚烷基二醇，特别是四溴双酚A（TBBA）的方法。 该方法的特征在于用饱和碱金属亚硫酸盐溶液洗涤含有溶解的四溴-4,4'-亚烷基二苯酚的有机相，优选在50至90℃。通过该洗涤处理，获得更高纯度的四溴化合物; 此外，母液可以循环使用而没有困难。