http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-748881-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_13ef102659c1a496330aeae6979abc83 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5704718ec4e98f5d6c374ae27e5728ef http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_25c086e90238af1740dce29bd09d1597 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_28b2c0fe29016d960cd6305d73c1c307 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C11D3-323 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C11D1-72 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C11D1-66 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C11D11-0082 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C11D3-32 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C11D1-72 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C11D1-66 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/F16K5-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C11D11-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/F16K3-02 |
| filingDate | 1952-12-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1956-05-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-748881-A |
| titleOfInvention | Improvements in or relating to the production of solid non-ionic surface active agents |
| abstract | Liquid non-ionic surface-active agents having the general formula R-S-(CH2CH2O)n-CH2CH2OH wherein R represents a straight chain alkyl group containing, preferably, 5 to 30 carbon atoms and n is an integer in the range of 5 to 50 are converted into a solid form by mixing the liquid agent with an excess by weight of solid urea in the presence of a reaction diluent and a reaction activator, maintaining the mixture until urea adduct formation has taken place and separating the solid product of urea and surface-active agent. The urea employed may contain biuret. The term "reaction diluent" denotes a liquid hydrocarbon which does not form urea adducts or a mixture of liquid hydrocarbons containing only a small proportion of hydrocarbon which forms urea adducts at the reaction temperature, the diluent being a non-solvent for urea and the liquid surface-active agents; examples are n-and iso-pentanes, n- and iso-hexanes, cyclopentane, cyclohexane and 40-150 DEG C. petroleum ether fractions. The term "reaction activator" denotes a compound having a solvent action on urea, e.g. water, a C1-3 alcohol, glycerol and ketones such as acetone and methyl ethyl ketone. The general conditions of the process are those given in the parent Specification. Preferably, the surface-active feed stock is pretreated as described in Specifications 748,879 and 748,880 and the adduct formation carried out as described in Specifications 748,877 and 748,878. In an example n-dodecyl mercaptan is reacted with ethylene oxide at 180 DEG C. in the presence of caustic soda until 6-8 mols. of oxide have been absorbed; the product is acidified with glacial acetic acid and added with some methanol to iso-pentane, solid urea is stirred into the mixture and the resulting solid product is filtered off yielding a free-flowing powder. According to the Provisional Specification, liquid or low melting solid non-ionic surface-active agents, comprising a compound having the general formula R-S-(CH2CH2O)n-CH2CH2OH or R-CO-O-(CH2CH2O)n-CH2CH2OH wherein R is a straight chain alkyl group and n is an integer are reacted with urea whereby solid surfaceactive agents are formed. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-11214763-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-11655436-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-11377628-B2 |
| priorityDate | 1952-12-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 59.