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    • 1. 发明授权
    • Method for the preparation of 3,3-methylenebis (benzoic acid)
    • 制备3,3-亚甲基双(苯甲酸)的方法
    • US3928430A
    • 1975-12-23
    • US49020774
    • 1974-07-19
    • KOPPERS CO INC
    • MRUK NORBERT J
    • C07C51/353C07C51/48C07C63/33
    • C07C51/353C07C51/48Y02P20/582C07C63/331
    • A method for the preparation of 3,3''-methylenebis (benzoic acid) which comprises reacting a mixture of benzoic acid and formaldehyde in the presence of dilute sulfuric acid at a temperature between 70* and 120*C. and preferably as a heterogeneous mixture. The heterogeneous reaction mixture comprising two solid components and an acid phase is filtered to provide the reaction product methylenebis (benzoic acid) and unreacted benzoic acid and the acidic filtrate. The acidic filtrate is recycled to the reaction vessel for use in a subsequent reaction. Water at temperatures between 60* and 100*C. is added to the mixture of methylenebis (benzoic acid) and benzoic acid to form an aqueous solution of benzoic acid and undissolved 3,3''-methylenebis (benzoic acid). The aqueous solution is filtered to provide 3,3''-methylenebis (benzoic acid). The aqueous filtrate is cooled and the benzoic acid which precipitates is filtered and recycled to the reaction vessel for use in a subsequent reaction, and the water is reused in subsequent extractions.
    • 一种制备3,3'-亚甲基双(苯甲酸)的方法,其包括在稀硫酸存在下,在70-120℃的温度下使苯甲酸和甲醛的混合物反应,优选作为非均相混合物 。 将包含两个固体组分和酸相的非均相反应混合物过滤,得到亚甲基双(苯甲酸)和未反应的苯甲酸和酸性滤液的反应产物。 将酸性滤液再循环到反应容器中,用于随后的反应。 加入温度在60℃和100℃之间的水,加入到亚甲基双(苯甲酸)和苯甲酸的混合物中以形成苯甲酸的水溶液和未溶解的3,3'-亚甲基双(苯甲酸)。 将水溶液过滤,得到3,3'-亚甲基双(苯甲酸)。 将含水滤液冷却,将沉淀的苯甲酸过滤并再循环至反应容器中用于随后的反应,并在随后的萃取中重复使用水。
    • 6. 发明授权
    • Process for the production of phthalic anhydride
    • 生产非水溶液的方法
    • US3852308A
    • 1974-12-03
    • US32677773
    • 1973-01-26
    • KOPPERS CO INC
    • RYDER RRYAN RKLAPPROTH W
    • C07C51/265C07C51/31C07C63/18
    • C07C51/265C07C51/313C07C63/16
    • In an improved process for the production of phthalic anhydride in which air and napthalene vapors are flowed upwardly through a reaction zone containing a fluidized oxidation catalyst, the improvement is effected by increasing the napthalene to catalyst contact ratio in a novel range, greatly in excess of the normal contact ratios that are now employed. The novel napthalene to catalyst contact ratio is achieved by using increased superatmospheric pressure much higher than those pressures normally used in such fluidized processes. The novel napthalene to catalyst contact ratio accomplished by the use of increased pressure permits fluidized oxidation to proceed at greatly increased napthalene feed rates and lower air to napthalene weight ratios than normally employed in such fluidized processes, while nevertheless maintaining moderate reaction temperatures, such as will produce a high yield of phthalic anhydride free to a novel extent of either insufficiently or over-oxidized products. The explosion hazard that one would expect to encounter in such an improved process under such intensified conditions of high napthalene to catalyst contact is avoided by using lower airnapthalene ratios than those ratios which will support explosive conditions. The aforesaid conditions encompass novel combinations of reaction temperature, pressure, reactant proportions and throughputs that effect a highly intensified catalysis; and that result in a several-multiple increase in unit plant capacity.
    • 在制备邻苯二甲酸酐的改进方法中,其中空气和萘气体蒸气向上流过含有流化氧化催化剂的反应区,通过将萘与催化剂接触比提高到大大超过 现在采用的正常接触比。 新型萘与催化剂接触比通过使用比在这种流化过程中通常使用的那些压力高得多的超大气压增加来实现。 通过使用增加的压力实现的新型萘与催化剂接触比允许流化氧化以比通常在这种流化方法中使用的大大增加的萘进料速率和较低的空气与萘重量比进行,同时保持适度的反应温度, 产生高产率的邻苯二甲酸酐,其新颖程度不足或过氧化产物。
    • 9. 发明授权
    • System and method for controlling emissions while pushing coke from a coke oven
    • 用于控制来自焦炉烤焦的排放的系统和方法
    • US3843459A
    • 1974-10-22
    • US34272373
    • 1973-03-19
    • KOPPERS CO INC
    • KRENKE V
    • C10B33/00C10B41/02
    • C10B33/003C10B41/02
    • 1. IN A SYSTEM FOR CONDUCTING EFFLUENT EMITTED DURING PUSHING OF COKE FRO A COKE OVEN CHAMBER THROUGH A CLOSED COKE GUIDE HAVING A HOOD THAT CONVEYS SAID EFFLUENT TOWARD A COLLECTING MAIN, WHICH INTERNALLY IS UNDER A PARTIAL VACUUM OR NEGATIVE PRESSURE, AND WHICH HAS A PLURALITY OF PIVOTABLE DOORS, WITH ONE SUCH DOOR BEING DISPOSED OPPOSITE EACH RESPECTIVE COKS OVEN CHAMBER, THE IMPROVE(A) A SYSTEM FOR CONTROLLING THE MOVEMENT OF THE DOOR IN SAID MAIN LOCATED OPPOSITE AN OVEN TO BE PUSHED INCLUDING: (1) SWITCH MEANS THAT IS ACURATED WHEN SAID COKE GUIDE FORMS A CLOSED FLOW PATH FOR THE EFFLUENT BETWEEN SAND HOOD AND THE COLLECTING MAIN; GUIDE FORMS A CLOSED FLOW PATH FOR THE EFFLUENT (II) MEANS ACTING RESPONSIVELY TO A SINGNAL GENERATED WHEN SAID SWITCH IS ACTURATED FOR DECREASING THE AMOUNTS OF SAID VACUUM OR NEGATIVE INTERNAL PRESSURE IN SAID COLLECTING MAIN; (III) MEANS OPENING SAID DOOR IN TIMED SEQUENCE AFTER SAID INTERNAL VACUUM OR NEGATIVE PRESSURE HAS BEEN DECREASED; AND (IV) MEANS FOR THEREAFTER INCREASING THE PARTIAL VACUUM OR NEGATIVE PRESSURE IN SAID COLLECTING MAIN WHEREBY THE EFFLUENT EMISSIONS CREATED DURING PUSHING FLOW THROUGH SAID OPENED DOOR AND THE HOOD INTO SAID COLLECTING MAIN.