US3840347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing cd(hg(scn)4)single crystals
Assignee: Siemens AG
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Filing: 1972-02-28
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Granted: 1974-10-08
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Expires: 1992-02-28
Abstract
Abstract Large Cd (Hg (SCN)4) single crystals are produced by crystallizing Cd (Hg (SCN)4) from a super-saturated solution thereof in solvent comprising a mixture of water and alcohol (for example, ethanol). Super-saturation of the crystallizing component in the solvent is achieved by changing the mixture ratio of the solvent components and/or by changing the temperature of the saturated solution of crystallizing component and solvent.
Inventors
- 👤 J Grabmaier
- 👤 R Plattner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:08
CPC Classifications
C; C30; C30B; C30B7/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
177 words
A METHOD OF PRODUCING CADIMUM-MERCURY TETRATHIOCYANATE SINGLE CRYSTALS COMPRISING: ADDING AT LEAST ABOUT 5 GRAMS OF CD(HG(SCN)4) PER LITER OF AN INITIAL SOLVENT SYSTEM COMPRISES OF A MIXTURE OF SOLVENT COMPONENTS CONSISTING ESSENTIALLY OF ABOUT 25 TO ABOUT 95 PERCENT OF A LOW BOILING ALCOHOL AND WATER SO AS TO ACHIEVE A SOLUTION OF SAID CD(HG(SCN)4) IN SAID SOLVENT SYSTEM; AND CHANGING THE CONCENTRATION OF ONE OF SAID SOLVENT COMPONENTS IN SAID SOLUTION UP TO SATURATION TO ATTAIN A RESULTANT SOLUTION SO THAT WHEN THE ALCOHOL CONCENTRATION IN SAID INITIAL SOLVENT SYSTEM IS IN THE RANGE OF AT LEAST 25 PERCENT AND UP TO 77 PERCENT, SAID RESULTANT SOLUTION HAS AN ALCOHOL CONCENTRATION LOWER THAN THAT OF SAID INITIAL SOLVENT SYSTEM AND WHEN THE ALCOHOL CONCENTRATION IN SAID INITIAL SOLVENT SYSTEM IS IN THE RANGE OF ABOUT AT LEAST 77 PERCENT AND UP TO 95 PERCENT, SAID RESULTANT SOLUTION HAS AN ALCOHOL CONCENTRATION GREATER THAN THAT OF SAID INITIAL SOLVENT SYSTEM WHEREBY CADIUM-MERCURY TETRATHIOCYANATE IS CRYSTALLIZED FROM SAID RESULTING SOLVENT SYSTEM AS A RELATIVELY LARGE SINGLE CRYSTAL.
Claim 2
Independent Claim
177 words
A METHOD OF PRODUCING CADIMUM-MERCURY TETRATHIOCYANATE SINGLE CRYSTALS COMPRISING: ADDING AT LEAST ABOUT 5 GRAMS OF CD(HG(SCN)4) PER LITER OF AN INITIAL SOLVENT SYSTEM COMPRISES OF A MIXTURE OF SOLVENT COMPONENTS CONSISTING ESSENTIALLY OF ABOUT 25 TO ABOUT 95 PERCENT OF A LOW BOILING ALCOHOL AND WATER SO AS TO ACHIEVE A SOLUTION OF SAID CD(HG(SCN)4) IN SAID SOLVENT SYSTEM; AND CHANGING THE CONCENTRATION OF ONE OF SAID SOLVENT COMPONENTS IN SAID SOLUTION UP TO SATURATION TO ATTAIN A RESULTANT SOLUTION SO THAT WHEN THE ALCOHOL CONCENTRATION IN SAID INITIAL SOLVENT SYSTEM IS IN THE RANGE OF AT LEAST 25 PERCENT AND UP TO 77 PERCENT, SAID RESULTANT SOLUTION HAS AN ALCOHOL CONCENTRATION LOWER THAN THAT OF SAID INITIAL SOLVENT SYSTEM AND WHEN THE ALCOHOL CONCENTRATION IN SAID INITIAL SOLVENT SYSTEM IS IN THE RANGE OF ABOUT AT LEAST 77 PERCENT AND UP TO 95 PERCENT, SAID RESULTANT SOLUTION HAS AN ALCOHOL CONCENTRATION GREATER THAN THAT OF SAID INITIAL SOLVENT SYSTEM WHEREBY CADIUM-MERCURY TETRATHIOCYANATE IS CRYSTALLIZED FROM SAID RESULTING SOLVENT SYSTEM AS A RELATIVELY LARGE SINGLE CRYSTAL.
Claim 3
Dependent Claim
18 words
A method as defined in claim 1 wherein said solvent system comprises a mixture of ethanol and water.
Claim 4
Dependent Claim
31 words
A method as defined in claim 2 wherein changing the concentration of one of said solvent components comprises removing an amount of a solvent component until said resultant solution is obtained.
Claim 5
Dependent Claim
25 words
A method as defined in claim 3 wherein said solution is changed by removal of an amount of ethanol sufficient to achieve said resultant solution.
Claim 6
Dependent Claim
24 words
A method as defined in claim 4 wherein removal of ethanol from said solution is achieved by removal of ethanol vapors above said solution.
Claim 7
Dependent Claim
25 words
A method as defined in claim 3 wherein said solution is changed by removal of an amount of water sufficient to achieve said resultant solution.
Claim 8
Dependent Claim
24 words
A method as defined in claim 6 wherein removal of water from said solution is achieved by removal of water vapor above said solution.
Claim 9
Dependent Claim
21 words
A method as defined in claim 7 wherein the water vapors are removed by contacting said vapors with a water-absorbing substance.
Claim 10
Dependent Claim
31 words
A method as defined in claim 2 wherein changing the concentration of one of said solvent components comprises adding an amount of a solvent component until said resultant solution is obtained.
Claim 11
Dependent Claim
24 words
A method as defined in claim 9 wherein said solution is changed by adding an amount of ethanol sufficient to achieve said resultant solution.
Claim 12
Dependent Claim
24 words
A method as defined in claim 10 wherein said solution is changed by adding an amount of water sufficient to achieve said resultant solution.
Claim 13
Dependent Claim
30 words
A method as defined in claim 1 wherein changing the concentration of one of said solvent components is achieved while said solution is at a temperature of about 20* C.
Claim 14
Dependent Claim
47 words
A method as defined in claim 1 wherein said solvent system is maintained at about 50* C. during the addition of the Cd(Hg(SCN)4) and during changing of the concentration of one of said solvent components in said solution, said solution is cooled down to about 20* C.
Claim 15
Independent Claim
175 words
A method of producing cadmium-mercury tetrathiocyanate single crystals comprising: adding at least about 5 grams of Cd(Hg(SCN)4) per liter of an initial solvent system comprised of a mixture of solvent components consisting essentially of about 25 to about 95 percent of ethanol and water so as to achieve a solution of said chemical formula in said solvent system; and changing the concentration of one of said solvent components in said solution up to saturation to attain a resultant solution so that when the ethanol concentration in said initial solvent system is in the range of at least 25 percent and up to 77 percent, said resultant solution has an ethanol concentration lower than that of said initial solvent system and when the ethanol concentration in said initial solvent system is in the range of about at least 77 percent and up to 95 percent, said resultant solution has an ethanol concentration greater than that of said initial solvent system whereby cadmium-mercury tetrathiocyanate is crystallized from said resulting solvent system as a relatively large single crystal.
Claim 16
Independent Claim
175 words
A method of producing cadmium-mercury tetrathiocyanate single crystals comprising: adding at least about 5 grams of Cd(Hg(SCN)4) per liter of an initial solvent system comprised of a mixture of solvent components consisting essentially of about 25 to about 95 percent of ethanol and water so as to achieve a solution of said chemical formula in said solvent system; and changing the concentration of one of said solvent components in said solution up to saturation to attain a resultant solution so that when the ethanol concentration in said initial solvent system is in the range of at least 25 percent and up to 77 percent, said resultant solution has an ethanol concentration lower than that of said initial solvent system and when the ethanol concentration in said initial solvent system is in the range of about at least 77 percent and up to 95 percent, said resultant solution has an ethanol concentration greater than that of said initial solvent system whereby cadmium-mercury tetrathiocyanate is crystallized from said resulting solvent system as a relatively large single crystal.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-07 | 1978-04-08 | 1978-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-07 | 1982-04-08 | 1982-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-07 | 1986-04-08 | 1986-10-08 | $7700.00 | Window Closed / Lapsed |