GB919450A - Control of scaling in boilers and evaporators - Google Patents

Control of scaling in boilers and evaporators

Info

Publication number
GB919450A
GB919450A GB515/61A GB51561A GB919450A GB 919450 A GB919450 A GB 919450A GB 515/61 A GB515/61 A GB 515/61A GB 51561 A GB51561 A GB 51561A GB 919450 A GB919450 A GB 919450A
Authority
GB
United Kingdom
Prior art keywords
water
starch
grafted polymer
feedwater
polymerisation
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
GB515/61A
Inventor
Brian Crosbie Fielding
Eric Frederick Thurston
Stanley Minor Todd
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries Ltd
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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB515/61A priority Critical patent/GB919450A/en
Publication of GB919450A publication Critical patent/GB919450A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
    • C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
    • C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
    • C02F5/12—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing nitrogen
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
    • C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
    • C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F251/00—Macromolecular compounds obtained by polymerising monomers on to polysaccharides or derivatives thereof

Abstract

919,450. Preventing incrustation. IMPERIAL CHEMICAL INDUSTRIES Ltd. Dec. 18, 1961 [Jan. 5, 1961], No. 515/61. Class 123 (1). Scaling in boilers, evaporators &c., particularly those in which corrosion is inhibited by phosphate treatment, is prevented or reduced by adding to the feedwater a quantity of a water-soluble grafted polymer as described in Specification 871,192, the polymer being derived by the polymerisation of an ethylenically unsaturated monomer in the presence of a preformed polymeric substance, the latter consisting of a water-soluble organic compound having a molecular weight greater than 1000 and being capable of entering into chemical combination with the ethylenically unsaturated monomer under the conditions normally employed for the polymerisation of such monomers. Preferably grafted polymers derived from starch or starch ethers and acrylonitrile are used, the polymers being partly or completely hydrolysed with caustic soda to give the corresponding starchgrafted sodium polyacrylates. The preformed polymeric material may also be cellulose ethers, starch dextrins or polyvinyl alcohol whilst the monomer may be acrylamide, acrylic acid, methacrylic acid, methacrylonitrile or methacrylamide. The amount of polymeric material in the grafted polymer may be between 5 and 50% by weight. The amount of grafted polymer added to the feedwater, the addition being made with the sodium phosphate or other conditioning agent, is from 1 to 100 parts per million parts of water by weight.
GB515/61A 1961-01-05 1961-01-05 Control of scaling in boilers and evaporators Expired GB919450A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB515/61A GB919450A (en) 1961-01-05 1961-01-05 Control of scaling in boilers and evaporators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB515/61A GB919450A (en) 1961-01-05 1961-01-05 Control of scaling in boilers and evaporators

Publications (1)

Publication Number Publication Date
GB919450A true GB919450A (en) 1963-02-27

Family

ID=9705726

Family Applications (1)

Application Number Title Priority Date Filing Date
GB515/61A Expired GB919450A (en) 1961-01-05 1961-01-05 Control of scaling in boilers and evaporators

Country Status (1)

Country Link
GB (1) GB919450A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992010433A1 (en) * 1990-12-06 1992-06-25 Basf Aktiengesellschaft Use of water-soluble natural graft polymers as water-treatment agents
CN110143680A (en) * 2019-06-11 2019-08-20 河南安立信环保科技有限公司 Water treatment agent containing compound ether emulsification fermentation liquid

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992010433A1 (en) * 1990-12-06 1992-06-25 Basf Aktiengesellschaft Use of water-soluble natural graft polymers as water-treatment agents
CN110143680A (en) * 2019-06-11 2019-08-20 河南安立信环保科技有限公司 Water treatment agent containing compound ether emulsification fermentation liquid
CN110143680B (en) * 2019-06-11 2021-12-03 河南安立信环保科技有限公司 Water treatment agent containing mixed ether emulsified fermentation liquor

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