GB342668A - Improvements relating to the preparation of combustible, solid poly-formaldehyde - Google Patents

Improvements relating to the preparation of combustible, solid poly-formaldehyde

Info

Publication number
GB342668A
GB342668A GB2996529A GB2996529A GB342668A GB 342668 A GB342668 A GB 342668A GB 2996529 A GB2996529 A GB 2996529A GB 2996529 A GB2996529 A GB 2996529A GB 342668 A GB342668 A GB 342668A
Authority
GB
United Kingdom
Prior art keywords
paraformaldehyde
formaldehyde
per cent
hours
acid
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
GB2996529A
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.)
WERNER SCHILT
Original Assignee
WERNER SCHILT
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 WERNER SCHILT filed Critical WERNER SCHILT
Priority to GB2996529A priority Critical patent/GB342668A/en
Publication of GB342668A publication Critical patent/GB342668A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G2/00—Addition polymers of aldehydes or cyclic oligomers thereof or of ketones; Addition copolymers thereof with less than 50 molar percent of other substances
    • C08G2/08—Polymerisation of formaldehyde

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Phenolic Resins Or Amino Resins (AREA)

Abstract

Solid combustible polymers of formaldehyde which can be used as fuel for automatic lighters are obtained by treating formaldehyde or incombustible polymers thereof such as paraformaldehyde with sulphuric or phosphoric acids of at least 2 per cent concentration at temperatures not exceeding 60 DEG C. The lower the reaction temperature, the greater should be the concentration of the acid employed, for example, 20-30 per cent sulphuric acid may be used to treat formaldehyde or its polymers at normal temperatures for several hours, or paraformaldehyde may be treated with 5-25 per cent sulphuric acid at 55-60 DEG C. for 1-3 hours. The products can be pressed into shaped pieces. According to examples (1) formaldehyde solution is mixed with concentrated sulphuric acid and left for 10-20 hours; the precipitated product is filtered off, washed with water and dried, (2) paraformaldehyde is treated with 30 per cent sulphuric acid, allowed to stand for 10 hours, and the product is filtered off and washed free from acid; the mother liquor containing sulphuric acid may be used to convert further paraformaldehyde by heating it therewith in a closed vessel for an hour at 60 DEG C., and (3) paraformaldehyde is mixed with 45 per cent phosphoric acid and allowed to stand for 50 hours at 25 DEG C.; water is added, and the product is filtered off, washed, and dried. Specifications 25830/13 and 247,955, [both in Class 2 (iii), Dyes &c.], are referred to.
GB2996529A 1929-10-03 1929-10-03 Improvements relating to the preparation of combustible, solid poly-formaldehyde Expired GB342668A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2996529A GB342668A (en) 1929-10-03 1929-10-03 Improvements relating to the preparation of combustible, solid poly-formaldehyde

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2996529A GB342668A (en) 1929-10-03 1929-10-03 Improvements relating to the preparation of combustible, solid poly-formaldehyde

Publications (1)

Publication Number Publication Date
GB342668A true GB342668A (en) 1931-02-03

Family

ID=10300078

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2996529A Expired GB342668A (en) 1929-10-03 1929-10-03 Improvements relating to the preparation of combustible, solid poly-formaldehyde

Country Status (1)

Country Link
GB (1) GB342668A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2864827A (en) * 1954-11-15 1958-12-16 Phillips Petroleum Co Process for polymerizing aldehydes
US3378502A (en) * 1963-04-30 1968-04-16 Hoechst Ag Process for preparing polymers of cyclic acetals using completely esterified polyphosphoric acid catalyst

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2864827A (en) * 1954-11-15 1958-12-16 Phillips Petroleum Co Process for polymerizing aldehydes
US3378502A (en) * 1963-04-30 1968-04-16 Hoechst Ag Process for preparing polymers of cyclic acetals using completely esterified polyphosphoric acid catalyst

Similar Documents

Publication Publication Date Title
GB342668A (en) Improvements relating to the preparation of combustible, solid poly-formaldehyde
SU139079A1 (en) The method of obtaining polymers
US1804893A (en) Process of decomposing lignified fibers
US1884802A (en) Inorganic cellulose esters and manufacture thereof
SU48305A1 (en) The method of obtaining resinous condensation products
DE462185C (en) Process for the production of chromating dyes
SU68532A2 (en) The method of obtaining film-forming material
US2330181A (en) Dehydrating castor oil
DE360691C (en) Process for the production of phthaleins
SU66100A1 (en) The method of obtaining dubitel
US2945890A (en) Production of 2:4-dinitroresorcinol
US1469044A (en) Tanning hides
SU108138A1 (en) The method of producing sulfonic acids
US622299A (en) Henri raymond vidal
GB313615A (en) Manufacture of condensation products from formaldehyde, thiourea and urea
SU8288A1 (en) The method of obtaining brown or yellow dyes
GB461641A (en) Improvements in or relating to the purification and granulation of pentaerythritol tetranitrate
GB470468A (en) Improvements in the manufacture and production of ureas from alpha-omega-diaminocarboxylic acids
GB226309A (en) Improvements in the manufacture of cellulose acetate
GB285488A (en) Process for the manufacture of aniline-2:5-disulphonic acid
Carrara CONDURANGIN.
GB368027A (en) Improvements in the manufacture and production of dimethylol urea
GB953105A (en) Improvements in or relating to the production of cyanuric acid
GB441919A (en) Improvements in the manufacture and production of nitrodibenzanthrones
CH155335A (en) Process for the production of a nitrogenous vat dye.