公开(公告)号：US20240351963A1

公开(公告)日：2024-10-24

申请号：US18638036

申请日：2024-04-17

Applicant: LUMMUS TECHNOLOGY LLC

Inventor： Rosette Barias

IPC: C07C2/06 ,  B01D3/00 ,  B01J19/24 ,  C07C1/22 ,  C07C7/09

CPC classification number: C07C2/06 ,  B01D3/009 ,  B01J19/245 ,  C07C1/22 ,  C07C7/09

Abstract: Systems and processes for the production of a high purity isobutylene stream, a high purity isooctene stream or for the co-production of a high purity isobutylene and a high purity isooctene. The systems and processes advantageously process mixed C4 hydrocarbon streams via etherification, back cracking, isomerization, and/or dimerization, along with various separation systems, to produce the desired high purity streams.

公开(公告)号：US11986793B2

公开(公告)日：2024-05-21

申请号：US17459038

申请日：2021-08-27

Applicant: GAS TECHNOLOGIES LLC

Inventor： Evan Visser ,  Walter Breidenstein

IPC: B01J19/24 ,  B01D3/00 ,  B01D3/14 ,  B64C27/12 ,  C07C41/56 ,  C07C41/58 ,  C10G5/06 ,  C10L1/02 ,  F16H57/00 ,  F16H57/025 ,  F16H57/04 ,  F16H57/02

CPC classification number: B01J19/245 ,  B01D3/009 ,  B01D3/143 ,  B64C27/12 ,  C07C41/56 ,  C07C41/58 ,  C10G5/06 ,  C10L1/026 ,  F16H57/0025 ,  F16H57/025 ,  F16H57/0424 ,  F16H2057/02043 ,  C07C41/58 ,  C07C43/30 ,  C07C41/56 ,  C07C43/30

Abstract: A method for forming poly(dimethoxymethane) includes a step of separating a formaldehyde-containing blend into a first bottom stream and a first top stream. The first formaldehyde-containing blend includes methanol, formaldehyde, and water while the first bottom stream includes water. The first top stream includes dimethoxymethane that is produced from the reaction between methanol and formaldehyde. The first top stream is separated into a second bottom stream and a second top stream. The second bottom stream includes poly(dimethoxymethane) while the second top stream includes dimethoxymethane, methanol, and ethanol. The second top stream is separated into a third bottom stream and a third top stream. Third bottom stream includes methanol and ethanol while the third top stream includes dimethoxymethane. The third top steam can be recycled to form additional poly(dimethoxymethane). A system that implements the method is also provided.

公开(公告)号：US11897833B2

公开(公告)日：2024-02-13

申请号：US17658739

申请日：2022-04-11

Applicant: Cameron International Corporation

Inventor： Steven Langley

IPC: C07C29/80 ,  C07C29/88 ,  C07C29/84 ,  B01D3/32 ,  B01D3/14 ,  B01D1/00 ,  B01D3/06 ,  C07C31/20 ,  B01D3/00

CPC classification number: C07C29/80 ,  B01D1/0082 ,  B01D3/06 ,  B01D3/143 ,  B01D3/322 ,  C07C29/84 ,  C07C29/88 ,  B01D3/009 ,  C07C31/202 ,  C07C29/80 ,  C07C31/202 ,  C07C29/88 ,  C07C31/202

Abstract: Embodiments described herein provide a method, comprising reducing pH of a glycol vaporization separator purge stream to form an acid stream; distilling the acid stream to form an overhead stream and a bottoms stream; and recycling the bottoms stream to the vaporization separator.

公开(公告)号：US20240018078A1

公开(公告)日：2024-01-18

申请号：US18039504

申请日：2021-12-01

Applicant: BASF SE

Inventor： Wolf-Steffen WEISSKER ,  Edward RICHMOND

IPC: C07C31/30 ,  C07C29/70 ,  B01D3/00 ,  B01D3/42

CPC classification number: C07C31/30 ,  C07C29/705 ,  B01D3/009 ,  B01D3/4277

Abstract: A method for controlling a reactive distillation column for effecting a transalcoholisation reaction, comprising feeding a metal methoxide into the reactive distillation column via a side feed; feeding a reactant alcohol into a lower part of the reactive distillation column; withdrawing methanol from the top of the reactive distillation column; and withdrawing a solution of a product metal alkoxide in the reactant alcohol from the bottom of the reactive distillation column; wherein the method comprises a process control scheme selected from: Scheme A: establishing a signal S1 which is responsive to a temperature in the rectifying section disposed above the feed of the metal methoxide; and manipulating in response to the signal S1 the feed amount of the reactant alcohol; Scheme B: establishing a signal S1 which is responsive to a temperature in the rectifying section disposed above the feed of the metal methoxide; and manipulating in response to the signal S1 the heat supplied to the bottom of the reactive distillation column. The invention also relates to a method for controlling a reactive distillation column for effecting a transalcoholisation reaction, comprising feeding a metal methoxide into the reactive distillation column via a side feed; feeding a reactant alcohol into a lower part of the reactive distillation column; causing an auxiliary alcohol to be present in the reactive distillation column; and optionally replenishing the auxiliary alcohol via a side feed located above the feed of the reactant alcohol and below the top of the column; withdrawing methanol from the top of the reactive distillation column; and withdrawing a solution of a product metal alkoxide in the reactant alcohol from the bottom of the reactive distillation column; wherein the method comprises a process control scheme selected from: Scheme C: establishing a signal S2 which is responsive to a temperature at a point located between the feed of the metal methoxide and the bottom of the reactive distillation column; and manipulating in response to the signal S2 the feed amount of the reactant alcohol; Scheme D: establishing a signal S2 which is responsive to a temperature at a point located between the feed of the metal methoxide and the bottom of the reactive distillation column; and manipulating in response to the signal S2 the heat supplied to the bottom of the reactive distillation column. The methods of the invention allow for improved controlling of a reactive distillation column for effecting a transalcoholisation reaction.

公开(公告)号：US20240017235A1

公开(公告)日：2024-01-18

申请号：US18198279

申请日：2023-05-16

Applicant: M2X Energy Inc.

Inventor： Paul E. Yelvington ,  Edwin Yik ,  John Anthony Dean ,  Joshua B. Browne

IPC: B01J19/00 ,  B01J19/24 ,  B01J35/04 ,  C07C29/152 ,  B01D3/00 ,  B01D53/02 ,  B01D53/22

CPC classification number: B01J19/0013 ,  B01J19/0093 ,  B01J19/2415 ,  B01J35/04 ,  C07C29/152 ,  B01D3/009 ,  B01D53/02 ,  B01D53/229

Abstract: Intensified plants comprising chemical reformers and downstream chemical synthesis equipment. Systems, methods and devices for process intensification (PI) that result in lowering part count, merging functionality, removing bottlenecks, reducing costs, and modularizing subsystems for ease of assembly and maintenance to obtain the overall simplification needed to achieve competitive product cost at small scales. In an embodiment, the improved plants employ engine reformers to produce synthesis gas, which is further converted into end products using intensified downstream reactors.

公开(公告)号：US11833456B2

公开(公告)日：2023-12-05

申请号：US17460261

申请日：2021-08-29

Applicant: VERSTILL DISTILLATION SYSTEMS, LTD.

Inventor： Matan Edvy

IPC: B01D3/02 ,  C12H6/02 ,  B01D3/00

CPC classification number: B01D3/02 ,  B01D3/003 ,  B01D3/009 ,  C12H6/02

Abstract: A method of batch distilling including providing a first substrate that upon distillation releases vapour having deleterious sulfur compounds, providing an inert still, adding the first substrate to the still, installing at least one first reactive article in the still and subsequently performing a first distillation run on the first substrate, such that the installed at least one first reactive article has a first exposed area that is exposed to the distillate, and collecting a first desired fraction from the first run. The distillation during the collection of the first desired fraction is performed at a rate of less than 5 L/(hr*m2) of collected first fraction per first exposed area. Compatible still and kit are also provided.

公开(公告)号：US20230365486A1

公开(公告)日：2023-11-16

申请号：US18312763

申请日：2023-05-05

Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： JAE WOO LEE ,  MINYONG LEE

IPC: C07C68/065 ,  C07C68/08 ,  B01D3/00 ,  B01D3/14 ,  B01D1/28

CPC classification number: C07C68/065 ,  C07C68/08 ,  B01D3/009 ,  B01D3/143 ,  B01D3/007 ,  B01D1/28

Abstract: Disclosed is a distillation apparatus having a various heat exchange methods added to a process of producing dimethyl carbonate using reactive distillation and pressure-swing distillation. According to the disclosure, internal and external heat integration between a high-pressure and a low-pressure distillation column, which constitute pressure-swing distillation columns, is applied to a dimethyl carbonate production process, and a vapor recompression heat pump configured to compress and heat a fluid and transfer the heat to a fluid having a relatively low temperature is applied to achieve additional heat exchange with a reactive distillation column, thereby improving the dimethyl carbonate production process in terms of energy and economic efficiency by reducing energy consumption while reducing investment and operating costs of a reboiler and a condenser, which are required in a conventional process.

公开(公告)号：US20230249098A1

公开(公告)日：2023-08-10

申请号：US18012996

申请日：2021-06-17

Applicant: BASF SE

Inventor： Bernd METZEN ,  Christian KUNKELMANN ,  Ortmund LANG ,  Marvin KRAMP ,  Claus HECHLER

IPC: B01D3/32 ,  B01D3/36 ,  B01D3/00 ,  C07C67/08 ,  C07C67/54

CPC classification number: B01D3/322 ,  B01D3/009 ,  B01D3/36 ,  C07C67/08 ,  C07C67/54

Abstract: The invention relates to an apparatus for carrying out mass transfer processes, comprising a column having at least two inlet pipes for introducing a gaseous phase, where separation-active internals are accommodated in the column and a column section extends from the at least two inlet pipes to the separation-active internals, in which section a coverage of a cross-sectional area of the column is less than 25%, based on the total cross-sectional area, and where the at least two inlet pipes have a height offset which corresponds to not more than three times an inlet pipe diameter and the at least two inlet pipes are at an angle (α) of from 60° to 150° to one another and have asymmetry with respect to one another. The invention further relates to a use of the apparatus and also a method for designing the apparatus.

公开(公告)号：US20230219820A1

公开(公告)日：2023-07-13

申请号：US18095006

申请日：2023-01-10

Applicant: Institute of Process Engineering, Chinese Academy of Sciences

Inventor： Chao HUA ,  Hongxing WANG ,  Fang BAI ,  Ping LU ,  Hai LI

IPC: C01B33/107 ,  B01D3/00 ,  B01D3/14

CPC classification number: C01B33/1071 ,  B01D3/009 ,  B01D3/143

Abstract: A cracking process for a reaction distillation of chlorosilane slurry includes feeding a chlorosilane slurry into a phase separator, drying a solid phase, feeding a chlorosilane polymer into a plate distillation column, returning kettle materials of the plate distillation column, and dividing a material produced from a top of the column. The process adopts an ionic liquid catalyst, which is environmentally friendly and reusable. The cracking and distillation of chlorosilane polymer are carried out simultaneously to shorten the time and increase the utilization rate of raw materials, which can reduce energy consumption and save costs and facilitate industrial production. A plate column is used as a distillation column, in which the two phases of the gas and liquid are sufficiently contacted. Therefore, the transfer of mass and heat is good, the production capacity is good, and the tower is not easily blocked, thereby making it easy to clean.

公开(公告)号：US20190209946A1

公开(公告)日：2019-07-11

申请号：US16326092

申请日：2017-08-11

Applicant: EPC Engineering & Technologies GMBH

Inventor： Michael Streng ,  Dieter Kloos ,  Malte Bracht

IPC: B01D3/34 ,  C08G64/06 ,  C08G64/30 ,  C08G64/20

CPC classification number: B01D3/346 ,  B01D3/009 ,  C08G64/06 ,  C08G64/205 ,  C08G64/307

Abstract: A method is described for producing a polycarbonate by reacting one or more diaryl carbonates with one or more aromatic hydroxy compounds, which are first mixed in a mixing device and enter, as a raw material mixture, a raw material mixture container to subsequently react in one or more reactors under reduced pressure and increased temperature to form polycarbonate, wherein the mixture of diaryl carbonate and aromatic hydroxy compound is subjected to a purification by an inert gas in a countercurrent process, in a stripping device, before entering the raw material mixture container. The present invention also relates to a stripping device which is particularly suitable for purifying a raw material mixture stream, and to the use of such a stripping device in a method for producing polycarbonate.