Patent US3928318A successfully refreshed from Google Patents.
US3928318A
Expired / Lapsed
US
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Process for making methyl glucoside
Assignee: Kaiser Aluminum and Chemical Corp
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Filing: 1974-11-01
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Granted: 1975-12-23
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Expires: 1994-11-01
Abstract
Abstract Methyl glucoside of low residual glucose content is directly made from glucose by methylating glucose with methanol in the presence of an acid catalyst and anhydrous, hydratable CaSO4. The produced methyl glucoside contains less than about 1% residual glucose and can be used without requiring removal of the residual glucose content.
Inventors
- 👤 Erwin Panusch
- 👤 Igor Sobolev
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:20
CPC Classifications
C; C07; C07H; C07H15/00; C07H15/02; C07H15/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
108 words
IN THE PROCESS OF MAKING METHYL GLUCOSIDE BY THE ACIDCATALYZED REACTION OF GLUCOSE AND METHANOL THE IMPROVEMENT WHICH COMPRISES INCORPORATING IN THE REACTION MIXTURE OF GLUCOSE, METHANOL AND ACID CATALYST, ANHYDROUS HYDRATABLE CASO4 IN AN AMOUNT SUFFICIENT TO PROVIDE A CASO4; GLUCOSE WEIGHT RATIO OF AT LEAST 1:1, MAINTAINING THE REACTION MIXTURE WITHIN THE TEMPERATURE RANGE OF ABOUT 50*C AND 200*C UNTIL FORMATION OF METHYL GLUCOSIDE CEASES, COOLING THE REACTION MIXTURE, NEUTRALIZING THE ACID CATALYST WITH A BASE CAPABLE OF FORMING A SALT OF NEUTRALIZATING WHICH IS INSOLUBLE IN THE REACTION MIXTURE, AND RECOVERING METHYL GLUCOSIDE HAVING A RESIDUAL GLUCOSE CONTENT OF LESS THAN ABOUT 1% BY WEIGHT.
Claim 2
Dependent Claim
108 words
IN THE PROCESS OF MAKING METHYL GLUCOSIDE BY THE ACIDCATALYZED REACTION OF GLUCOSE AND METHANOL THE IMPROVEMENT WHICH COMPRISES INCORPORATING IN THE REACTION MIXTURE OF GLUCOSE, METHANOL AND ACID CATALYST, ANHYDROUS HYDRATABLE CASO4 IN AN AMOUNT SUFFICIENT TO PROVIDE A CASO4; GLUCOSE WEIGHT RATIO OF AT LEAST 1:1, MAINTAINING THE REACTION MIXTURE WITHIN THE TEMPERATURE RANGE OF ABOUT 50*C AND 200*C UNTIL FORMATION OF METHYL GLUCOSIDE CEASES, COOLING THE REACTION MIXTURE, NEUTRALIZING THE ACID CATALYST WITH A BASE CAPABLE OF FORMING A SALT OF NEUTRALIZATING WHICH IS INSOLUBLE IN THE REACTION MIXTURE, AND RECOVERING METHYL GLUCOSIDE HAVING A RESIDUAL GLUCOSE CONTENT OF LESS THAN ABOUT 1% BY WEIGHT.
Claim 3
Dependent Claim
30 words
Process according to claim 1, wherein the CaSO4 is incorporated in the reaction mixture in an amount sufficient to provide a CaSO4:glucose weight ratio from about 1:1 to about 3:1.
Claim 4
Dependent Claim
17 words
Process according to claim 1, wherein the CaSO4:glucose weight ratio is from about 1:1 to about 2:1.
Claim 5
Dependent Claim
11 words
Process according to claim 1, wherein the acid catalyst is H2SO4.
Claim 6
Dependent Claim
23 words
Process accordinG to claim 4, wherein the base is selected from the group consisting essentially of Ca(OH)2, Mg(OH)2, Ba(OH)2, Sr(OH)2 and mixtures thereof.
Claim 7
Dependent Claim
24 words
Process according to claim 1, wherein the reaction is carried out in a closed vessel within the temperature range of about 100*C and 150*C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-22 | 1979-06-23 | 1979-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-22 | 1983-06-23 | 1983-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-22 | 1987-06-23 | 1987-12-23 | $7700.00 | Window Closed / Lapsed |