GB629899A - Improvements in treatment of impurity-containing solutions - Google Patents

Improvements in treatment of impurity-containing solutions

Info

Publication number
GB629899A
GB629899A GB3775646A GB3775646A GB629899A GB 629899 A GB629899 A GB 629899A GB 3775646 A GB3775646 A GB 3775646A GB 3775646 A GB3775646 A GB 3775646A GB 629899 A GB629899 A GB 629899A
Authority
GB
United Kingdom
Prior art keywords
hydroxide
per cent
mixture
oxide
solution
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3775646A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB3775646A priority Critical patent/GB629899A/en
Publication of GB629899A publication Critical patent/GB629899A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C13—SUGAR INDUSTRY
    • C13B—PRODUCTION OF SUCROSE; APPARATUS SPECIALLY ADAPTED THEREFOR
    • C13B20/00—Purification of sugar juices
    • C13B20/02—Purification of sugar juices using alkaline earth metal compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/01—Separation of suspended solid particles from liquids by sedimentation using flocculating agents

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biochemistry (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)

Abstract

Solutions containing impurities are purified by adding a mixture of the oxide and hydroxide of magnesium, removing the resulting precipitate, and then adjusting the pH substantially to neutrality. The mixture of oxide and hydroxide is made by calcining the hydroxide for about 30 minutes at 400 DEG C., so that the oxide contains 1-35 per cent, preferably about 2 per cent, of hydroxide. A fresh batch of the mixture should be prepared for each operation. From 0.25 to 6 per cent of the mixture based on the amount of substance to be retained in solution is added in order to raise the pH to 9-10. The liquid is then heated to 70-90 DEG C. and the precipitate removed by decanting and filtering. A solution of a substance to reduce the pH to 5-7.3 and to precipitate impurities, e.g. a 10 per cent phosphoric acid solution is then added and the liquid is heated to 80-90 DEG C. and finally filtered. Specification 501,754, [Group VI], is referred to.ALSO:Sugar juices and other sugar containing liquors are purified by adding a mixture of the oxide and hydroxide of magnesium removing the resulting precipitate, and then adjusting the pH substantially to neutrality. The mixture of oxide and hydroxide is made by calcining the hydroxide for about 30 minutes at 400 DEG C, so that the oxide contains 1-35 per cent. preferably about 2 per cent. of hydroxide. A fresh batch of the mixture should be prepared for each operation. From 0.25 to 6 per cent. of the mixture based on the amount of sugar in the solution is added in order to raise the pH to 9-10. The liquid is then heated to 70-90 DEG C and the precipitate removed by decanting and filtering a solution of a substance to reduce the pH to 5-7.3 and to precipitate impurities, e.g., a 10 per cent. phosphoric acid solution is then added, and the liquid is heated to 80-90 DEG C, and finally filtered. Specification 501,754 is referred to.
GB3775646A 1946-12-23 1946-12-23 Improvements in treatment of impurity-containing solutions Expired GB629899A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3775646A GB629899A (en) 1946-12-23 1946-12-23 Improvements in treatment of impurity-containing solutions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3775646A GB629899A (en) 1946-12-23 1946-12-23 Improvements in treatment of impurity-containing solutions

Publications (1)

Publication Number Publication Date
GB629899A true GB629899A (en) 1949-09-30

Family

ID=10398786

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3775646A Expired GB629899A (en) 1946-12-23 1946-12-23 Improvements in treatment of impurity-containing solutions

Country Status (1)

Country Link
GB (1) GB629899A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE958460C (en) * 1953-04-14 1957-02-21 Magnetrit A G Process for the treatment of sugar juices, in particular for improving the filterability
DE960440C (en) * 1953-08-29 1957-03-21 Magnetrit A G Process for the treatment of sugar juices

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE958460C (en) * 1953-04-14 1957-02-21 Magnetrit A G Process for the treatment of sugar juices, in particular for improving the filterability
DE960440C (en) * 1953-08-29 1957-03-21 Magnetrit A G Process for the treatment of sugar juices

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