公开(公告)号：US20150175565A1

公开(公告)日：2015-06-25

申请号：US14578803

申请日：2014-12-22

Applicant: Scientific Design Company, Inc.

Inventor： Andrew D. Schmitz ,  William Crudge

IPC: C07D301/10

CPC classification number: C07D301/10

Abstract: A method for the epoxidation of an olefin comprising reacting a feed gas composition containing an olefin, oxygen, and a halocarbon moderator having a first moderator concentration M1 in the presence of an epoxidation catalyst at a first temperature T1; increasing the first temperature to a second temperature T2; and increasing the first moderator concentration to a second moderator concentration M2, wherein the second moderator concentration is defined by: M2=M1(1+r)T2−T1 wherein the temperature has the units of degrees Celsius, and r is a constant factor which is in the range of from 0.001% to 100%.

Abstract translation: 一种烯烃的环氧化方法，包括在环氧化催化剂的存在下，在第一温度T1下使包含烯烃，氧和具有第一缓和剂浓度M1的卤化碳慢化剂的进料气体组合物反应; 将第一温度升高到第二温度T2; 并且将第一减速剂浓度增加到第二减速剂浓度M2，其中第二减速剂浓度由以下定义：M2 = M1（1 + r）T2-T1其中温度具有摄氏度的单位，r是常数因子 在0.001％至100％的范围内。

公开(公告)号：US08975424B1

公开(公告)日：2015-03-10

申请号：US14143684

申请日：2013-12-30

Applicant: Scientific Design Company, Inc.

Inventor： Wojciech Suchanek ,  Andrzej Rokicki

IPC: C07D301/10 ,  B01J23/66

CPC classification number: B01J23/66 ,  B01J23/688 ,  C07D301/10

Abstract: A silver-based ethylene oxide catalyst is provided that has enhanced stability. The enhanced stability is obtained in the present invention by providing a silver-based ethylene oxide catalyst that includes from 100 ppm to 1000 ppm of zinc, and from greater than 450 ppm to less than 800 ppm of cesium. Zinc and cesium are promoters that are introduced to a finished carrier either prior to, coincidentally with, or subsequent to the deposition of the silver. The silver-based ethylene oxide catalyst can be used in the epoxidation of ethylene to ethylene oxide.

Abstract translation: 提供了具有增强的稳定性的银基环氧乙烷催化剂。 通过提供包含100ppm至1000ppm锌以及大于450ppm至小于800ppm的铯的银基环氧乙烷催化剂，在本发明中获得了增强的稳定性。 锌和铯是在银沉积之前，巧合地或之后引入成品载体的促进剂。 银基环氧乙烷催化剂可用于乙烯至环氧乙烷的环氧化。

公开(公告)号：US20150057150A1

公开(公告)日：2015-02-26

申请号：US14537430

申请日：2014-11-10

Applicant: Scientific Design Company, Inc.

Inventor： Nabil Rizkalla ,  Andrzej Rokicki

IPC: B01J23/68

CPC classification number: B01J23/688 ,  B01J21/04 ,  B01J23/66 ,  B01J37/0201 ,  B01J37/08 ,  C07D301/08 ,  C07D301/10 ,  Y02P20/52

Abstract: A process for the preparation of a catalyst useful for the vapor phase production of ethylene oxide from ethylene and oxygen comprising providing a catalyst precursor comprising an inert support having a catalytically effective amount of a silver containing compound, a promoting amount of an alkali metal containing compound, and a promoting amount of a transition metal containing compound disposed thereon; calcining the catalyst precursor to convert the silver in the silver containing compound to metallic silver by heating the catalyst precursor to form a catalyst; and curing the catalyst in an inert gas atmosphere at temperatures of about 250° C. to about 600° C. for a period of about 1 hour to 200 hours.

Abstract translation: 一种用于制备用于从乙烯和氧气生产环氧乙烷的催化剂的方法，包括提供催化剂前体，其包含具有催化有效量的含银化合物的惰性载体，促进量的含碱金属的化合物 ，和其上设置有过渡金属的化合物的促进量; 煅烧催化剂前体，通过加热催化剂前体以形成催化剂，将含银化合物中的银转化成金属银; 并在约250℃至约600℃的温度下在惰性气体气氛中固化催化剂约1小时至200小时。

公开(公告)号：US20140187807A1

公开(公告)日：2014-07-03

申请号：US14144752

申请日：2013-12-31

Applicant: Scientific Design Company, Inc.

Inventor： Serguei Pak

IPC: C07D301/10

CPC classification number: C07D301/10

Abstract: A high selectivity catalyst start-up process is provided in which an excess level of chloride moderator (greater than 1 ppm) is present in the feed gas composition during each of the various stages of the start-up process. The excess level of chloride used in the start-up process maintains a low level of selectivity (less than 86%) during the entire start-up process. Despite the low selectivity values achieved during the start-up process of the present disclosure, high selectivity catalysts that are conditioned by such a start-up process exhibit improved catalyst performance during the normal operation of the catalyst.

Abstract translation: 提供了高选择性催化剂启动方法，其中在启动过程的各个阶段期间，进料气体组合物中存在过量的氯化物缓和剂（大于1ppm）。 在启动过程中使用的过量氯化物在整个启动过程中保持低水平的选择性（小于86％）。 尽管在本公开的启动过程中实现的低选择性值，通过这种启动方法调节的高选择性催化剂在催化剂的正常操作期间表现出改进的催化剂性能。

公开(公告)号：US20130096330A1

公开(公告)日：2013-04-18

申请号：US13655000

申请日：2012-10-18

Applicant: SCIENTIFIC DESIGN COMPANY, INC.

Inventor： Hassan Eisa Al-Ahmadi ,  Ashok S. Padia

IPC: C07D301/03

CPC classification number: C07D301/03 ,  C07D301/04

Abstract: A method for the epoxidation of an olefin comprising the steps of reacting a feed gas composition containing an olefin, oxygen, and a moderator having an optimal moderator concentration in the presence of an epoxidation catalyst at a first temperature and having a first selectivity; and increasing the optimal moderator concentration to a second moderator concentration and whereby the first selectivity is lowed to a second selectivity and the first temperature to a second temperature.

Abstract translation: 一种用于烯烃环氧化的方法，包括以下步骤：在第一温度下在含有环氧化催化剂存在下具有最佳缓和剂浓度的含有烯烃，氧气和缓和剂的进料气体组合物反应并具有第一选择性; 并且将最佳缓和剂浓度增加至第二减速剂浓度，由此第一选择性降低至第二选择性，第一温度降低至第二温度。

公开(公告)号：US20240367136A1

公开(公告)日：2024-11-07

申请号：US18654763

申请日：2024-05-03

Applicant: Scientific Design Company, Inc.

Inventor： Mansoor HUSAIN ,  VIKAS KUMAR CHALKA ,  SOMNATH CHOWDHURY ,  SANDIP KUMAR LAHIRI

IPC: B01J19/00 ,  G06F30/27 ,  G06F119/22

Abstract: The invention relates to a method of generating a signal for adjusting a parameter of a process for ethylene oxide production comprising the steps: Acquiring (100) process data of the process for ethylene oxide production, Predicting (200) a future value for the parameter based on the process data, Comparing (300) the future value to a predefined reference and based on a result of said comparison Generating (400) the signal for adjusting the parameter.

公开(公告)号：US12030028B2

公开(公告)日：2024-07-09

申请号：US17564658

申请日：2021-12-29

Applicant: Scientific Design Company, Inc.

Inventor： Mohammad Ganjvar ,  Jiacheng Ni

IPC: B01J19/00 ,  F28D7/10

CPC classification number: B01J19/0013 ,  B01J19/006 ,  F28D7/10 ,  B01J2219/00081 ,  B01J2219/00763

Abstract: A baffle (i.e., tube support) for use in a shell-and-tube heat exchange reactor, such as, for example, an ethylene oxide (EO) reactor, is provided that accommodates reduced tube pitch, and thus more catalyst packed tubes can be inside the reactor. The baffle, which can be referred to herein as a corrugated grid support, includes a plurality of corrugated stainless steel strips which sit into each other and form a grid pattern having tube openings. Each tube opening is configured to permit a catalyst packed tube to be inserted therein, while allowing a sufficient open area along the shell side of the tube to permit coolant to flow through the reactor.

公开(公告)号：US20240091886A1

公开(公告)日：2024-03-21

申请号：US18524844

申请日：2023-11-30

Applicant: Scientific Design Company, Inc.

Inventor： Mohammad Ganjvar

IPC: B23K33/00 ,  B01J19/00 ,  B01J19/24

CPC classification number: B23K33/006 ,  B01J19/0053 ,  B01J19/2415 ,  B01J2219/00081 ,  B23K2101/14

Abstract: Reduced tube pitch within a shell-and-tube heat exchange reactor such as, for example, an EO reactor, is provided by utilizing a welding material that has a high tensile (i.e., a tensile strength of greater than 600 MPa). Reduced tube pitch allows for more elongated tubes (the tubes are filled with a catalyst) to be present in a reactor, and thus a smaller reactor can be manufactured. Notably, the use of a high tensile strength welding material allows the implementation of a small welding groove located between a beveled sidewall of a beveled upper portion of an opening provided in a tube sheet overlay material (that is located atop a tube sheet) and an outermost sidewall of the elongated tube passing through the opening in the tube sheet overlay material.

公开(公告)号：US11559799B2

公开(公告)日：2023-01-24

申请号：US17130961

申请日：2020-12-22

Applicant: Scientific Design Company, Inc.

Inventor： Mohammad Ganjvar

IPC: B01J8/06 ,  C07D301/10 ,  B01J37/02 ,  B01J23/50 ,  B01J37/08

Abstract: An ethylene oxide (EO) reactor is provided in which a removable impingement basket is configured to be inserted into the reactor inlet pipe of the EO reactor. The removable impingement basket provides protection for the silver-based catalyst filled tubes and other components that are present inside the EO reactor as well as providing another access point into the EO reactor. The removable impingement basket also can provide better distribution of the inlet gas as compared to an EO reactor containing a non-removable impingement plate.

公开(公告)号：US20190337912A1

公开(公告)日：2019-11-07

申请号：US16511542

申请日：2019-07-15

Applicant: Scientific Design Company, Inc.

Inventor： Shaun McGovern ,  Mansoor Husain ,  John Sullivan

IPC: C07D301/10 ,  C07D301/32 ,  B01J8/06 ,  C07C7/12

Abstract: A method for the oxidation of ethylene to form ethylene oxide which comprises: providing an aqueous stream containing ethylene glycol and impurities; introducing the aqueous stream in a first ion exchange treatment bed to reduce the content of these impurities; determining whether an outlet of the first ion exchange treatment bed has a conductivity greater than about 5 μS/cm; upon determining that the outlet of the first ion exchange treatment bed has a conductivity greater than about 5 μS/cm, introducing the outlet of the first ion exchange treatment bed into a second ion exchange treatment bed; and upon determining that the outlet of the first ion exchange treatment bed has a conductivity greater than about 60 μS/cm, redirecting the introduction of the aqueous stream to the second ion exchange treatment bed and regenerating the first ion exchange bed.