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Process for preparing disilane by using molecular sieves

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Title: Process for preparing disilane by using molecular sieves
Patent Number: 5,089,244
Publication Date: February 18, 1992
Appl. No: 07/587,125
Application Filed: September 24, 1990
Abstract: Process for preparing disilane, wherein a raw gas including monosilane, disilane, trisilane and impurities such as phosphine, hydrogen sulfide, arsine, disiloxane and higher siloxanes, undergoes a step of separation by distillation for the substantial elimination of the other compounds of silicon, except disiloxane, and the substantial elimination of phosphine, hydrogen sulfide and arsine impurities, wherein a final purification of the disilane takes place by selective adsorption on molecular sieves, in which one is a sieve of type 3 A and which is used for the elimination of the siloxanes and hydrogen sulfide and the other is a sieve of type 4 A for the elimination of phosphine and arsine.
Inventors: Parent, Jean-Claude (Garches, FRX); Renaudin, Marie-Helene (Paris, FRX)
Assignees: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude (Paris, FRX)
Claim: We claim
Claim: 1. A process for preparing substantially purified disilane from a raw gas including monosilane, disilane, trisilane and impurities of phosphine, hydrogen sulfide, arsine, disiloxane and higher siloxanes, comprising: separating by distillation to substantially eliminate compounds of silicon, except disiloxane, and substantially eliminating impurities comprising phosphine, hydrogen sulfide and arsine by selective adsorption on molecular sieves, wherein one sieve is type 3 A and eliminates siloxanes and hydrogen sulfide and another sieve is type 4 A and eliminates phosphine and arsine to provide a substantially purified disilane.
Claim: 2. The process according to claim 1, wherein molecular sieve 4 A for elimination of phosphine and arsine is modified by substituting cadmium ions for sodium ions.
Claim: 3. The process according to claim 1, wherein the siloxanes and hydrogen sulfide are first eliminated on a molecular sieve 3 A, and phosphine and arsine are eliminated on molecular sieve 4 A.
Current U.S. Class: 423/347; 55/75
Current International Class: C01B 3304
Patent References Cited: 3982912 September 1976 Yatsurugi et al.
4554141 November 1985 Scull et al.
4976944 December 1990 Pacauro et al.
Other References: Ruthven, "Zeolites as Selective Adsorbents", Chemical Engineering Progress, Feb. 1988, pp. 42-50.
Chemical Abstracts, vol. 66, No. 8, Feb. 20, 1967, p. 3102, Abrege No. 3246w, Columbus, Ohio, U.S.A.; V. Milenko et al.: Ion-Exchange Equilibriums in Molecular Sieve 4A" & Trans. Faraday Soc. 1966, vol. 62, No. 12 pp. 3479-3488.
Primary Examiner: Chaudhuri, Olik
Assistant Examiner: Horton, Ken
Attorney, Agent or Firm: Browdy and Neimark
Accession Number: edspgr.05089244
Database: USPTO Patent Grants
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Process for preparing disilane by using molecular sieves
– Name: DocumentID
  Label: Patent Number
  Group: Patent
  Data: 5,089,244
– Name: DateEntry
  Label: Publication Date
  Group: Patent
  Data: February 18, 1992
– Name: DocumentID
  Label: Appl. No
  Group: Patent
  Data: 07/587,125
– Name: DateFiled
  Label: Application Filed
  Group: Patent
  Data: September 24, 1990
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Process for preparing disilane, wherein a raw gas including monosilane, disilane, trisilane and impurities such as phosphine, hydrogen sulfide, arsine, disiloxane and higher siloxanes, undergoes a step of separation by distillation for the substantial elimination of the other compounds of silicon, except disiloxane, and the substantial elimination of phosphine, hydrogen sulfide and arsine impurities, wherein a final purification of the disilane takes place by selective adsorption on molecular sieves, in which one is a sieve of type 3 A and which is used for the elimination of the siloxanes and hydrogen sulfide and the other is a sieve of type 4 A for the elimination of phosphine and arsine.
– Name: Author
  Label: Inventors
  Group: Patent
  Data: <searchLink fieldCode="ZA" term="%22Parent%2C+Jean-Claude%22">Parent, Jean-Claude</searchLink> (Garches, FRX); <searchLink fieldCode="ZA" term="%22Renaudin%2C+Marie-Helene%22">Renaudin, Marie-Helene</searchLink> (Paris, FRX)
– Name: OtherAuthors
  Label: Assignees
  Group: Patent
  Data: <searchLink fieldCode="ZS" term="%22L'Air+Liquide%2C+Societe+Anonyme+pour+l'Etude+et+l'Exploitation+des+Procedes+Georges+Claude%22">L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude</searchLink> (Paris, FRX)
– Name: Comment
  Label: Claim
  Group: Patent
  Data: We claim
– Name: Comment
  Label: Claim
  Group: Patent
  Data: 1. A process for preparing substantially purified disilane from a raw gas including monosilane, disilane, trisilane and impurities of phosphine, hydrogen sulfide, arsine, disiloxane and higher siloxanes, comprising: separating by distillation to substantially eliminate compounds of silicon, except disiloxane, and substantially eliminating impurities comprising phosphine, hydrogen sulfide and arsine by selective adsorption on molecular sieves, wherein one sieve is type 3 A and eliminates siloxanes and hydrogen sulfide and another sieve is type 4 A and eliminates phosphine and arsine to provide a substantially purified disilane.
– Name: Comment
  Label: Claim
  Group: Patent
  Data: 2. The process according to claim 1, wherein molecular sieve 4 A for elimination of phosphine and arsine is modified by substituting cadmium ions for sodium ions.
– Name: Comment
  Label: Claim
  Group: Patent
  Data: 3. The process according to claim 1, wherein the siloxanes and hydrogen sulfide are first eliminated on a molecular sieve 3 A, and phosphine and arsine are eliminated on molecular sieve 4 A.
– Name: CodeClass
  Label: Current U.S. Class
  Group: Patent
  Data: 423/347; 55/75
– Name: CodeClass
  Label: Current International Class
  Group: Patent
  Data: C01B 3304
– Name: Ref
  Label: Patent References Cited
  Group: Patent
  Data: <searchLink fieldCode="RF" term="%223982912%22">3982912</searchLink> September 1976 Yatsurugi et al.<br /><searchLink fieldCode="RF" term="%224554141%22">4554141</searchLink> November 1985 Scull et al.<br /><searchLink fieldCode="RF" term="%224976944%22">4976944</searchLink> December 1990 Pacauro et al.
– Name: Ref
  Label: Other References
  Group: Patent
  Data: Ruthven, "Zeolites as Selective Adsorbents", Chemical Engineering Progress, Feb. 1988, pp. 42-50.<br />Chemical Abstracts, vol. 66, No. 8, Feb. 20, 1967, p. 3102, Abrege No. 3246w, Columbus, Ohio, U.S.A.; V. Milenko et al.: Ion-Exchange Equilibriums in Molecular Sieve 4A" & Trans. Faraday Soc. 1966, vol. 62, No. 12 pp. 3479-3488.
– Name: AuthorEditor
  Label: Primary Examiner
  Group: Patent
  Data: <searchLink fieldCode="ZE" term="%22Chaudhuri%2C+Olik%22">Chaudhuri, Olik</searchLink>
– Name: AuthorEditor
  Label: Assistant Examiner
  Group: Patent
  Data: <searchLink fieldCode="ZE" term="%22Horton%2C+Ken%22">Horton, Ken</searchLink>
– Name: AuthorCorporate
  Label: Attorney, Agent or Firm
  Group: Patent
  Data: <searchLink fieldCode="ZG" term="%22Browdy+and+Neimark%22">Browdy and Neimark</searchLink>
– Name: AN
  Label: Accession Number
  Group: ID
  Data: edspgr.05089244
PLink https://login.libproxy.scu.edu/login?url=https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&scope=site&db=edspgr&AN=edspgr.05089244
RecordInfo BibRecord:
  BibEntity:
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      – Text: English
    Titles:
      – TitleFull: Process for preparing disilane by using molecular sieves
        Type: main
  BibRelationships:
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      – PersonEntity:
          Name:
            NameFull: Parent, Jean-Claude
      – PersonEntity:
          Name:
            NameFull: Renaudin, Marie-Helene
    IsPartOfRelationships:
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          Dates:
            – D: 18
              M: 02
              Text: February 18, 1992
              Type: published
              Y: 1992
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