http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1378981-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b1a8f92c331b255c0b42b829ccd90cd0 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01F7-0653 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F20-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F1-54 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F20-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C02F11-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F20-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F2-32 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01F7-0653 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F2-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F120-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C02F1-54 |
| filingDate | 1972-09-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1975-01-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1378981-A |
| titleOfInvention | Process for the separation of red mud from alumina solutions |
| abstract | 1378981 Treating red mud NALCO CHEMICAL CO 25 Sept 1972 [13 Jan 1972] 44255/72 Heading C1A Aqueous suspensions of red mud and dissolved alumina are treated to remove the suspended red mud with water-soluble acrylic polymers which contain at least 80% of acrylic acid or acrylic acid salt moieties by using as the acrylic polymer an inverted acrylic polymer latex, said latex having been produced by (A) forming a water-inoil emulsion from water which contains dissolved therein at least one monomer at least 80% by weight of which is acrylic acid or an acrylic acid salt thereby producing a monomer phase of concentration 30-70% by weight of said emulsion, an inert hydrophobic liquid, a waterin-oil emulsifying agent (e.g. hexadecyl sodium phthalate, sorbitan monooleate, sorbitan monostearate, cetyl or stearyl sodium phthalate or metal soaps), in a concentration of from 0À1-10% by weight, a free radical initiator (e.g. benzoyl peroxide, lauroyl peroxide, isobutyronitile, potassium persulphate), (B) heating said emulsion under free radical forming conditions to polymerize the monomers to form an acrylic polymer which is contained in the emulsion, (C) inverting said polymerized emulsion in water to produce an inverted acrylic polymeric latex (e.g. by addition of a surfactant to the polymer containing emulsion or to the water). The polymer may be a homopolymer selected from the group consisting of polyacrylic acid and salts thereof or may be derived from copolymerizing an alkali-metal acrylate with a different monomer comprising an ethylenically unsaturated polymerizable compound containing a hydrophilic group in a side chain (numerous examples are provided). The oil phase may be any inert hydrophobic liquid (e.g. benzene, xylene, toluene, mineral oils, kerosenes, naphthas and petrolatums. The acrylic polymer may be used in conjunction with starch and polymerization may be effected by use of high energy or ultra voilet irradiation. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6328445-B1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-2164639-B http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-2164639-A |
| priorityDate | 1972-01-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 51.