Processes and systems for purifying silane-containing streams are disclosed with relatively less silane being lost in impurity streams by use of distillation and/or condensation …

Legal parties

Inventors (applicants): Zhihui Gu, Puneet Gupta, Timothy Dinh Truong
Assignees (initial): MEMC Electronic Materials, Inc. (St. Peters, US)
Agents: Armstrong Teasdale LLP (attorney)

The application was examined by Jonathan Miller, Nina Bhat (USPTO dept. 1771)


  • 1. A system for purifying a silane-containing stream comprising silane and one or more compounds …
  • 2. The system as set forth in claim 1 comprising: …
  • 3. The system as set forth in claim 1 comprising: …

Cited documents


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Brief Description of the Drawings

FIG. 1 is a schematic of a system for recovering silane from the overhead fraction of a light-ends distillation column according to a first embodiment of the present disclosure; FIG. …


Field of the Disclosure

The field of the disclosure relates to purification of silane-containing streams and, particularly, to methods for purifying silane with relatively less silane being lost in impurity streams by use of distillation …

Cross-Reference to Related Applications

The present application claims the benefit of U.S. Provisional Application No. 61/390,078, filed Oct. 5, 2010 and U.S. Provisional Application No. 61/390,075, filed Oct. 5, 2010, both of which are incorporated …

Detailed Description

In accordance with various embodiments of the present disclosure, processes for purifying silane that involve distillation operations and which achieve high purity and high silane recovery relative to conventional processes …

More details about Systems for Purifying Silane

Miscellaneous patent data

The protection scope is defined by 18 claims, the patent was granted on Sep. 3, 2013, the application publication date is Sep. 27, 2011, the invention is named Systems for Purifying Silane, numbered 13/246,574 (application), the assignee company is MEMC Electronic Materials, Inc. located in St. Peters (US), the published applicant's name is Zhihui Gu, the applicant's city - Houston, state - TX, the assignee is categorized as a United States company, the patent was extended by 4 days, the invention details are shown in 9 figures, invented by Zhihui Gu et al., categorized under Plural columns as a primary classification, particularly claims a system for purifying a silane-containing stream comprising silane and one…, was examined by 1771 USPTO department, the examiners - Nina Bhat, Jonathan Miller, the claim 1 is exemplary as chosen by the examiner, similar categories include Gas bench, General processes for purification of waste gases, Apparatus or devices specially adapted therefor, Vertical flues, Ion-selective electrodialysis, Esters of organic acids, bag, cage, hose, tube, sleeve or like filtering elements, heating chamber, dual temperature exchange, Autothermic, Separatory and thermolytic, includes the following drawings: Systems for Purifying Silane, Schematic of a silane-recovery separation, Schematic of a system for recovering, Schematic of a system for recovering, the inventor's name is Gupta Puneet, the inventor's state is TX, city - Houston, the known agent's company name - Armstrong Teasdale LLP, illustrated by 9 drawings, the grant number is 08524045 (publication number).

Invention classification information

The invention is classified under Fractional distillation, Parallel, Column, Liquefaction, Plural stills, Plural columns, Of hydrogen, Processes or apparatus for liquefying or solidifying gases or gaseous mixtures, Hydrides of silicon. The designated search classifications include Column, Parallel, Plural Distillations Performed on Same Material, Plural columns, Plural stills, Distillation of initial distillate, Reducing material, Including step of adding catalyst or reacting material, Of hydrogen, Liquefaction.

Patent details
Publication number 08524045
Publication date Sep. 3, 2013
Kind code B2
Application number 13/246,574
Application date Sep. 27, 2011
Application type U
Application series code 13
Extension term 4
National classification 202/154
Total number of claims 18
Exemplary claims 1
Number of drawings 9
Number of figures 9
Terminal disclaimer
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