EP0044659A2
Expired / Lapsed
EP
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Method for production of xanthan gum using Xanthomonas Campestris ATCC 31601
Assignee: Standard Oil Co
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Filing: 1981-07-07
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Granted: —
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Expires: 2001-07-07
Abstract
Abstract Xanthan gum is produced by means of semi-continuous fermentation using a culture of either Xanthomonas campestris XCP-19 ATCC 31601 in a minimal medium, allowing the system to ferment for a period of about 24 hours, withdrawing a portion of the fermented medium, recovering xanthan from the withdrawn portion, adding fresh, sterile medium to the residual medium and repeating the above cycle.
Inventors
- 👤 William Peter Weisrock
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 02:33
CPC Classifications
C; C12; C12P; C12P19/00; C12P19/04; C12P19/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
78 words
A method for the production of xanthan gum which comprises introducing a culture of Xanthomonas campestris XCP-19 having the identifying characteristics of ATCC 31601, into a fermentation zone containing a nutrient medium to produce both bacterial cell growth and xanthan gum, withdrawing a portion of the fermented medium from said zone, recovering xanthan gum from said portion, thereafter adding a fresh sterile volume of said medium to the residual liquid in said zone and repeating the above cycle.
Claim 2
Independent Claim
78 words
A method for the production of xanthan gum which comprises introducing a culture of Xanthomonas campestris XCP-19 having the identifying characteristics of ATCC 31601, into a fermentation zone containing a nutrient medium to produce both bacterial cell growth and xanthan gum, withdrawing a portion of the fermented medium from said zone, recovering xanthan gum from said portion, thereafter adding a fresh sterile volume of said medium to the residual liquid in said zone and repeating the above cycle.
Claim 3
Dependent Claim
25 words
A method according to Claim 1 in which the withdrawn fermented medium amounts to from about 25-90% of the total liquid volume in said zone.
Claim 4
Dependent Claim
19 words
A method according to Claim 1 or Claim 2 in which said nutrient medium employed is a minimal medium.
Claim 5
Dependent Claim
16 words
A method according to Claim 3 in which the minimal medium contains a complex nitrogen source.
Claim 6
Dependent Claim
16 words
A method according to Claim 4 in which said complex nitrogen source is derived from-yeast extract.
Claim 7
Independent Claim
25 words
A method according to any preceding claim wherein the amount of fresh sterile medium is essentially equal to the volume of said withdrawn fermented medium.
Claim 8
Dependent Claim
77 words
In a method for the production of xanthan gum, the steps which comprise introducing a strain of Xanthomonas campestris bacteria identified as Xanthomonas campestris XCP-19 ATCC 31601, into a fermentation zone containing a liquid nutrient medium to produce both bacterial cell growth and xanthan gum, withdrawing a portion of the fermented medium from said zone, recovering xanthan from said portion and thereafter maintaining said strain in serial culture for at least 10 transfers without affecting xanthan productivity.
Claim 9
Dependent Claim
77 words
In a method for the production of xanthan gum, the steps which comprise introducing a strain of Xanthomonas campestris bacteria identified as Xanthomonas campestris XCP-19 ATCC 31601, into a fermentation zone containing a liquid nutrient medium to produce both bacterial cell growth and xanthan gum, withdrawing a portion of the fermented medium from said zone, recovering xanthan from said portion and thereafter maintaining said strain in serial culture for at least 10 transfers without affecting xanthan productivity.
References Cited (Backward Citations)
No citation records indexed.
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