公开(公告)号：US4655937A

公开(公告)日：1987-04-07

申请号：US715688

申请日：1985-03-25

Applicant: David C. Hendrix

Inventor： David C. Hendrix

IPC: B01D33/073 ,  B01D33/08 ,  B01D33/36

CPC classification number: B01D33/073 ,  B01D2201/282

Abstract: Disclosed is an improved rotary drum vacuum filter that is especially useful in the filtration of particulates that form an easily eroded cake. The improved filter utilizes sprayers and a spray blocking means to achieve an unexpectedly efficient rinse of the cake.

Abstract translation: 公开了一种改进的旋转鼓真空过滤器，其特别可用于过滤形成容易腐蚀的饼的颗粒。 改进的过滤器利用喷雾器和喷雾阻挡装置来实现蛋糕的意想不到的有效冲洗。

公开(公告)号：US5346620A

公开(公告)日：1994-09-13

申请号：US114701

申请日：1993-08-31

Applicant: David C. Hendrix ,  Andrew J. McNabb ,  Nguyen L. Kim ,  Michael Loden ,  Jaime R. Morales

Inventor： David C. Hendrix ,  Andrew J. McNabb ,  Nguyen L. Kim ,  Michael Loden ,  Jaime R. Morales

IPC: C02F1/52 ,  C02F3/12 ,  C02F3/30 ,  C02F9/00 ,  B01D9/02 ,  C02C3/30

CPC classification number: C02F3/302 ,  C02F1/5272 ,  C02F3/12 ,  C02F9/00 ,  C02F2101/327 ,  C02F2101/345 ,  Y02W10/15 ,  Y10S210/903

Abstract: The present invention is a process for treatment of waste water streams having a sodium sulfate content of above 20 percent. The process is useful for treating waste water generated in the production of polyethyleneimine and cyclohexanone. The process includes the steps of removing sodium sulfate from waste water by the addition of organic solvent. The waste water having reduced sodium sulfate content is then subjected to biological treatment with activated sludge. First the waste water is subjected to pre-treatment. Pre-treated waste water is combined other waste water and treated by denitrification and nitrification.

Abstract translation: 本发明是一种处理硫酸钠含量高于20％的废水流的方法。 该方法可用于处理聚乙烯亚胺和环己酮生产中产生的废水。 该方法包括通过加入有机溶剂从废水中除去硫酸钠的步骤。 然后将具有减少的硫酸钠含量的废水用活性污泥进行生物处理。 首先废水经过预处理。 预处理废水与其他废水结合，经脱氮硝化处理。

公开(公告)号：US06355179B1

公开(公告)日：2002-03-12

申请号：US09457725

申请日：1999-12-10

Applicant: David C. Hendrix

Inventor： David C. Hendrix

IPC: C02F172

CPC classification number: C02F1/722 ,  C02F2101/38 ,  Y10S210/903

Abstract: Decomposition of excess hydroxylamine is accomplished by bringing a hydroxylamine-containing wastewater stream into contact with hydrogen peroxide. Most preferably, the wastewater stream is at neutral pH (e.g., pH between 7-8) and at elevated temperature (e.g., at least about 90° C.) when brought into contact with hydrogen peroxide. The presence of ammonium ion (NH+) accelerates the decomposition of hydroxylamine in the wastewater stream.

Abstract translation: 通过使含羟胺的废水与过氧化氢接触来实现过量羟胺的分解。 最优选地，当与过氧化氢接触时，废水流处于中性pH（例如，pH在7-8之间）和升高的温度（例如至少约90℃）。 铵离子（NH +）的存在加速了废水中羟胺的分解。

公开(公告)号：US5068464A

公开(公告)日：1991-11-26

申请号：US199844

申请日：1988-05-26

Applicant: David C. Hendrix

Inventor： David C. Hendrix

IPC: C07C27/00 ,  C07C27/12 ,  C07C29/50 ,  C07C35/08 ,  C07C45/00 ,  C07C45/28 ,  C07C45/33 ,  C07C49/603 ,  C07C67/00

CPC classification number: C07C45/33 ,  C07C27/12 ,  C07C29/50 ,  C07C2101/14

Abstract: A continuous process for the partial oxidation of hydrocarbons is disclosed wherein the oxidizing gas is partitioned into the hydrocarbon by means of countercurrent flow of an aqueous solution of oxygen prepared in a separate vessel, thus avoiding direct contact of hydrocarbon and oxidizing gas.

Abstract translation: 公开了一种用于烃的部分氧化的连续方法，其中通过在单独的容器中制备的氧的水溶液的逆流流动将氧化气体分配成烃，从而避免烃和氧化气体的直接接触。