strontium;dihydroxide

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: In addition, the following method for purifying strontium nitrate is disclosed in U.S. Pat. No. 3,065,052: an aqueous solution of strontium nitrate containing barium impurities is prepared, this solution is gradually adjusted to at least the neutral range with nitric acid, the adjusted solution is mixed with a chromic acid solution to produce a strongly acidic solution, a strontium hydroxide solution is gradually added to the resulting solution containing a nitrate and an acid to adjust the pH to 11 while this solution is agitated, this pH is kept unchanged for several minutes to allow the barium impurities to precipitate as barium chromate, the solution is then filtered to remove the barium chromate, nitric acid is subsequently added to the filtrate to gradually bring the pH to about 1 while the filtrate is boiled, and the filtrate is then evaporated to precipitate strontium nitrate crystals, yielding strontium nitrate having the following average composition: 99.85% Sr(NO3)2, 0.05% Ba(NO3)2, 0.004% NaNO3, Ca(NO3)2 (undetected), and the like. In addition, the following method for purifying strontium nitrate 3,065,052: an aqueous solution of strontium nitrate containing barium impurities is prepared to produce a strongly acidic solution this pH is kept unchanged for several minutes to precipitate as barium chromate the solution is then filtered to remove the barium chromate, nitric acid is subsequently added to the filtrate the filtrate is then evaporated to precipitate strontium nitrate crystals

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Thirty one grams (0.1 mole) of the product prepared in Example I-B is mixed with 300 mls water. 79 grams of strontium hydroxide (0.65 mole) is added slowly at 65°-70° C. while maintaining the pH at 10-10.5. The mixture is stirred for an additional three hours after the addition of the strontium hydroxide. The solution is cooled and 180 grams of 10% hydrochloric acid is added slowly to a pH of 1.3. The acidified solution is next evaporated to dryness in vacuo. The residue is extracted with acetone and the acetone extract is filtered and evaporated to dryness. There is thus obtained 23 g of residue containing 45.7% (60.5% yield) trans-aconitic acid and 10.7% of a mixture of the lactones of isocitric acid and alloisocitric acid. while maintaining the pH at 10-10.5 The solution is cooled next evaporated to dryness in vacuo The residue is extracted with acetone the acetone extract is filtered evaporated to dryness

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Thirty one grams (0.1 mole) of the product prepared in Example I-B is mixed with 300 mls water. 79 grams of strontium hydroxide (0.65 mole) is added slowly at 65°-70° C. while maintaining the pH at 10-10.5. The mixture is stirred for an additional three hours after the addition of the strontium hydroxide. The solution is cooled and 180 grams of 10% hydrochloric acid is added slowly to a pH of 1.3. The acidified solution is next evaporated to dryness in vacuo. The residue is extracted with acetone and the acetone extract is filtered and evaporated to dryness. There is thus obtained 23 g of residue containing 45.7% (60.5% yield) trans-aconitic acid and 10.7% of a mixture of the lactones of isocitric acid and alloisocitric acid. while maintaining the pH at 10-10.5 The solution is cooled next evaporated to dryness in vacuo The residue is extracted with acetone the acetone extract is filtered evaporated to dryness

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: In a method according to the present invention strontium L-glutamate hexahydrate has been prepared by reacting strontium hydroxide with glutamic acid at a temperature in a range of from about 120° C. to about 135° C. and at a pressure of from about 1 to about 1.7 bar, optionally under an inert gas atmosphere, for a time period of from about 15 min to about 60 min to obtain strontium glutamate. The method may further involve a step of filtering the hot reaction mixture immediately after heating is stopped to remove precipitated calcium carbonate from the reaction mixture. Further details and guidelines for optimization of the reaction appears from Example 8. has been prepared of from about 120° C. to about 135° C.

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: In a method according to the present invention strontium L-glutamate hexahydrate has been prepared by reacting strontium hydroxide with glutamic acid at a temperature in a range of from about 120° C. to about 135° C. and at a pressure of from about 1 to about 1.7 bar, optionally under an inert gas atmosphere, for a time period of from about 15 min to about 60 min to obtain strontium glutamate. The method may further involve a step of filtering the hot reaction mixture immediately after heating is stopped to remove precipitated calcium carbonate from the reaction mixture. Further details and guidelines for optimization of the reaction appears from Example 8. has been prepared of from about 120° C. to about 135° C.

Conditions: temp:75.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A three neck round bottom flask was charged with 89.0 grams of the dithiophosphoric acid that was obtained from Example 9. To this was added 15.1 grams of strontium hydroxide. The reaction was heated to 75° C. for approximately 30 minutes. The reaction was attached to an aspirator to remove any water that had formed. The reaction was then allowed to cool back to 35° C., and 4.2 g of 17.5% hydrogen peroxide was added. After mixing for 2.5 hours, 11.1 grams of triethylene glycol dinonanoate was added. The reaction was then heated under vacuum and any remaining water was removed by distillation. After the temperature reached 105° C., the final product was filtered with diatomaceous earth. was obtained from Example 9 to remove any water that had formed to cool back to 35° C. After mixing for 2.5 hours The reaction was then heated under vacuum any remaining water was removed by distillation reached 105° C. the final product was filtered with diatomaceous earth

Conditions: temp:155.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a mixture of 134 g of nonylphenol, 174 g of process oil (Mentor 28:Esso Petroleum) and 62 g of an aromatic hydrocarbon solvent (Solvesso 100: Esso Petroleum) was added 243 g of strontium hydroxide (octahydrate salt) gradually to disperse it, the mixture was subjected to reaction at 105° C. for one hour, and water was completely removed at 130° C. Carbon dioxide (10 L/hour) was blown thereinto for 5 hours to progress reaction, and the mixture was gradually heated to 155° C. to continue reaction while water was distilled off, and then filtered to give a brown solution of an overbased strontium nonylphenolate-carbonate complex (Sr=15%; metal ratio=2.9) (this product is designated S-5). to disperse it the mixture was subjected to reaction at 105° C. for one hour water was completely removed at 130° C reaction was distilled off filtered

Conditions: temp:155.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a mixture of 134 g of nonylphenol, 174 g of process oil (Mentor 28:Esso Petroleum) and 62 g of an aromatic hydrocarbon solvent (Solvesso 100: Esso Petroleum) was added 243 g of strontium hydroxide (octahydrate salt) gradually to disperse it, the mixture was subjected to reaction at 105° C. for one hour, and water was completely removed at 130° C. Carbon dioxide (10 L/hour) was blown thereinto for 5 hours to progress reaction, and the mixture was gradually heated to 155° C. to continue reaction while water was distilled off, and then filtered to give a brown solution of an overbased strontium nonylphenolate-carbonate complex (Sr=15%; metal ratio=2.9) (this product is designated S-5). to disperse it the mixture was subjected to reaction at 105° C. for one hour water was completely removed at 130° C reaction was distilled off filtered

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: In a method according to the present invention strontium L-glutamate hexahydrate has been prepared by reacting strontium hydroxide with glutamic acid at a temperature in a range of from about 120° C. to about 135° C. and at a pressure of from about 1 to about 1.7 bar, optionally under an inert gas atmosphere, for a time period of from about 15 min to about 60 min to obtain strontium glutamate. The method may further involve a step of filtering the hot reaction mixture immediately after heating is stopped to remove precipitated calcium carbonate from the reaction mixture. Further details and guidelines for optimization of the reaction appears from Example 8. has been prepared of from about 120° C. to about 135° C.

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The starting phosphor is first washed in a solution, preferably saturated solution of strontium hydroxide. This is generally done in a number of wash steps to produce a first washed phosphor. The washing is done primarily to remove residual boric acid which is present on the surface of the phosphor particles as a result of the phosphor manufacturing process. In this washing step, strontium hydroxide reacts with the boric acid to produce strontium hexaborate which is more soluble than the strontium borate phosphor itself. The starting phosphor is first washed in a solution, preferably saturated solution of strontium hydroxide to produce a first washed phosphor to remove residual boric acid which a result of the phosphor manufacturing process

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: As shown in FIG. 1, a 0.025M strontium hydroxide (Sr(OH)2) suspension as a metal ion source was mixed in a container with a 0.5M urea ((NH2)2CO) aqueous solution as a carbonate ion source to prepare a mixture solution. The pH of the mixture solution was 12.60. The container having the mixture solution was placed into a reaction vessel and held at 90° C. for 120 minutes while agitating the mixture, whereby thermal decomposition of urea (heating reaction) occurred to produce strontium carbonate crystals as the foregoing carbonate particles. The pH of the liquid after heating reaction, measured at room temperature (25° C.), was reduced to 11.50. The agitation was conducted at 500 rpm. to prepare a mixture solution was placed into a reaction vessel

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Thirty one grams (0.1 mole) of the product prepared in Example I-B is mixed with 300 mls water. 79 grams of strontium hydroxide (0.65 mole) is added slowly at 65°-70° C. while maintaining the pH at 10-10.5. The mixture is stirred for an additional three hours after the addition of the strontium hydroxide. The solution is cooled and 180 grams of 10% hydrochloric acid is added slowly to a pH of 1.3. The acidified solution is next evaporated to dryness in vacuo. The residue is extracted with acetone and the acetone extract is filtered and evaporated to dryness. There is thus obtained 23 g of residue containing 45.7% (60.5% yield) trans-aconitic acid and 10.7% of a mixture of the lactones of isocitric acid and alloisocitric acid. while maintaining the pH at 10-10.5 The solution is cooled next evaporated to dryness in vacuo The residue is extracted with acetone the acetone extract is filtered evaporated to dryness