Document 6596RwoQrOgqyONyyeqk8eK4g

M< ) 4 -A* vV. r'-:' V -*- tJ -K' " . 'f. r .. i POLYMER CLEANING SYSTEM: Diagram of the "M-Pyrol Spray-Solw" polymer equipment cleaning system, patented by GAF Corporation. The ``M-Pyroi'' solvent, originally developed by GAF (or Its economical recovery capability, is said to be now showing timely usefulness in reducing worker contact with hazardous post-polymer residues of vinyl chloride. VCM Residues Said To Decline With Patented GAF Solvent Use GAF Corporation has been issued two patents for post-polymerization uses of an N-a!kyl lactam solvent in polyvinyl chloride reactors, which uses could have significant bearing on efforts to reduce the potential forPVC production ker contact with residual, or escaped, amounts of vinyl chloride monomer. ihe solvent, N-methyl 2-pyrrolidone and trademarked "M-Pyrel", has been applied by GAF to the development cf, first, a highefficiency automated cleaning process for Northern Natural Gas PVC reactors which eliminates the need for human entry into the vessels and permits Buying LPG Transports unique high recoverablity and re-use of the original solvent, and, second, a process for the recovery and purification of vinyl chloride gas venting from PVC reactors. "M-Pyrel" was originally marketed by the company in 1968 as "the closest thing to a universal solvent for thermoplastics available'.' Specifically, inquiries were made among PVC producers seeking interest for its use as a highly effective but generally unknown reactor cleanser. According to Rennie Berni, -product manager for acetylene chemicals-solvents at GAF and developer of the solvent and its Northern Natural Gas Company of Omaha, Neb., has signed contracts with Centromor, the import-export en terprise of the United Polish Shipyards, Poland, for the purchase of two liquefied petroleum gas transport ships. The ships, also able to transport an hydrous ammonia, will cost nearly $100 million. Scheduled for delivery in late 1977, they will be built in Gdynia, Po land. Mr. W. A. Strauss, Chairman of Northern, says the purchase of these ships represents another major move by thermoplastics applications at the compa ny, PVC process engineers expressed little interest originally in the method. Combining with Artisan Industries Inc., of Waltham Mass., GAF developed an ad vanced cleaning system based on "MPyrel" in conjunction with a modified, verticle type, white film evaporator. The proc ess developed by the two companies had his company in energy related busi nesses. The carriers will be used to transport LPG from the Mid-East, where the company is actively negotiat ing for supplies, to Houston, Tex., where the company and Texas Eastern Trans mission Corporation have acquired 143 acres of land and are considering the construction of a major LPG terminal. the advantage of not only offering PVC en gineers a complete cleaning system but, in addition, had a potentially high solvent re covery capability. 'rhe high-efficiency cleaning process < nated the need for human entry into r,. .tors while improving the quality of cleaning operations and thereby reducing the potential for impurities in, and the product of, subsequent resin mixes. .GAF, in 1969-70, again made the rounds of PVC manufacturers with the new "sys tem" but while somewhat more interest was shown, according to Mr. Berni, only two companies agreed to try the new proce dure. The solvent-resin separation rate was not as high as GAF had hoped at that point, and most producers apparently saw no compelling advantage to the process. However, beginning in the Fall of 1973, Mr. Bernie reports that interest in the "M- Pyrol" system picked-up dramatically among PVC makers. That was just about the time early information on the toxicity, and potential carcinogenicity, of VCM began to circulate. Today, Mr. Berni says that interest in "M-Pyrol" is "accelerat ing" as it becomes apparent that human entry into PVC vats is no longer tolerable. GAF was issued a patent on the cleaning Ascorbic Acid (Vitamin C) Biotin (Vitamin H) d-Calcium Pantothenate (Vi Cyanocobalamine Crystals i Folic Acid (Vitamin BC or f Niacinamide Vitamin PP) Pyridoxine HCI (Vitamin B? Riboflavine (Vitamin B2)Sodium Ascorbate (Vitamin Thiamine HCI and Mononiti dl-alpha-Tocopherol Acetati SIERRA IIMTERSMATIOIMAL. 1144 Clifton Av. P.0. Box 1302 Clifton, NJ. 07013 Phone: (201) 778-8222 Telex: 133754 (CHEM CO) Cable: SIERRA CL1FT0NNJ Fine Reagents; Biochemical Sp For Laboratory Special Volume Application DCC Ninhydrin Detergent decontarc 'Vhe railroads were authorized to apply Here are a tew of the reactions of this versatile, bifunctional compound... -- ......... . -.................... .............. ............... > output will total about Ji pounds per cjpita in that country as against a world average of about 8 pounds per capita, Mr. Florcscu estimates. The current plui. also lays heavy empha sis on small-tonnage and fine chemical products, including process chemicals for textiles, leather, paper, processed plastics, rubber, catalyst, reagent, cosmetics, and ion exchangers In the pharmaceutical industry Mr. Flo rcscu envisages incremental growth valued at 1,100 million Romanian lei during 1074- 1975, while in the ATA tire industry the in crease will run to 860,000 sets.- Mr. Florescu has large hopes of substan tially increasing Romania's foreign ex change via the industry he directs. Most of this would de- rive from trade with Europe, but he also hopes to expand exchange with the US. In a visit to this country concluded a few days ago. he met with representatives of a number of chemical firms and he says, set up "many tentative pacts" with them. He declined to specify for repbrters the com panies involved or the precise nature of these agreements, but he says they in volved exchange of products and equip ment. The products in these deals include tires, plastics, pharmaceuticals and drugs, and companies that Mr. Florescu is known to have been in contact with include Union Carbide, Avon, du Pont, and Warner Lam bert. At a press meeting held just before Mr. Florescu returned to Europe, he said that some of the tentative pacts, and large-scale Romania-US trade depend on Romania's winning most favored nation status (MFN) from the US and expressed considerable confidence that it would be forthcoming this year. Observers here, however, doubt that this will happen because the Jackson rider on the foreign trade legislation before the Sen ate, which bars MFN to countries which restrict legislation, combined with White House objections to the rider will probably prevent the necessary legislative action. Within the next few years, these observ ers add, Romania is sure to get MFN. DATA SHEETS AND SAMPLES AVAILABLE ON REQUEST ? CH ITV6TICS, I r\C. 90 Tokeneke Road Darien, Connecticut 06820 Phona: 203-655-8741 Cabla: EVANSCHEM TWX 710-457-3356 I/CM Residues Continued trom Page 23 system in October 1973. A second patent, on a potentially more significant process in the light of the health alarm over VCM, was issued to the company April of this year, ft involves the use of "M-Pyrol" as a selec tive solvent for absorption of VCM gas dur ing venting operations following polymeri zation. It is during venting that much of the VCM in work place environments escapes, and it is a procedure that will have to be improved if PVC makers are to achieve the low or nil. air levels of the gas that Occupa tional Safety & Health Administration OSHA is currently deliberating. The latter process is still experimental and it is unclear how significant an effect it can have on reducing VCM escape. Howev er, GAF reports that "M-Pyrol" can re move at least 95 percent of the vented VCM vapors, by weight, already, and further, can purify the vapor into a liquid conden sate of 99 percent VCM by weight which can be recycled into the polymerization process thus conserving the currently cost ly and scarce material. 23159002 a t xxxyyj'ttA T"--^ a- including: Phenol Acetone BTX Stanalchem, Inc., one ofthe Johananoff Group, acts as t catalyst between buyer and Stanalchem, Inc. phone (21 Through Stanalchem you h; resources ofthe totally intei system provided by other cc Johananoff Group: 8 advanced chemical ocea 12 regional sales and procu linked by a global comm 10 strategically located bul terminals Stanalchem, An independent company in the JohananoffG roup 299 Park Avenue, New York, N.Y. Phone: (212) 758-9060 Telex: (RCA) 234402, 236826; o July 8, 1974 CHEMICAL