WHAT'S NEW IN V I N Y L S
vinyl a c e t a t e copolymer latex RESYN® 1103
A vinyl acetate copolymer with excellent paper coating properties: • Efficient pigment binding. •
Excellent mechanical stability. • Good ink, varnish and wax holdout. • Excellent printed gloss. • Good water resistance. And it is one of the least expensive p r o d u c t s for h i g h - q u a l i t y paper and board. APPLICATIONS Most rapidly developing uses in the paper coating industry—for breadwrap, frozen food wrap, bleached kraft board, vat-lined cylinder board, offset paper, unbleached board and papers. Also has potential as a textile finish, in aerosol spray "starches", paper saturation, special impregnations such as box toe fabric for shoes. Why not investigate the advantages of RESYN 1103 in your current operations or development projects? For complete informat i o n , contact NATIONAL—your prime source for vinyl acetate polymers and copolymers.
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Send RESYN 1103 Data
Name Company Address City
Zone
State
National RESINS NATIONAL STARCH and CHEMICAL CORPORATION
750 Third Avenue. New York 17 (Dept. C) 52
C&EN
JULY
8, 1 9 6 3
PROTOTYPE. Workman at Esso Research and Engineering makes adjustments on a pilot hydrogen purification unit. System can produce hydrogen at two purities simultaneously, is practical for capacities up to 10 million cu. ft. per day
Esso Process Upgrades Impure Hydrogen Based on use of high-capacity adsorbent, method is said to be simpler than cryogenic techniques Esso Research and Engineering has developed a new process for purifying hydrogen. Esso has a pilot plant in operation at its Florham Park, N.J., facilities, says the process is being used commercially for refinery operations. Esso gives few details of the process except to say it is based on the use of a cheap, high-capacity adsorbent. It adds that the company's Bayway, N.J., refinery is studying the possibility of using the process in its operations. Esso says the process can be used to prepare extremely pure hydrogen for food hydrogenation or for cylinder hydrogen sales. Its pilot plant has successfully run 99.005+% hydrogen. Lower purity hydrogen (95 to 9 9 % ) , used in chemical or petroleum refinery operations, can also be prepared. Also, it is possible to design for simultaneous production of an extremely pure and a moderately pure hydrogen stream, Esso says. To utilize the process, a hydrogen feed stream must be available. Feed
streams with about 2 5 % hydrogen or more can be handled. Esso adds, however, that the richer the feed stream the lower the cost. The adsorption process removes hydrogen sulfide, carbon monoxide, nitrogen, and oxygen as well as light hydrocarbons usually found in feed streams. The process can also handle moderate amounts of hydrocarbons above the usual methane and ethane molecular weights. In comparing the process to cryogenic methods of purification, Esso says its system is simpler and economics are favorable, especially in smaller plant sizes. Esso claims the process is attractive in plant sizes up to about 5 to 10 million cu. ft. per day. The company adds that a plant to produce 1.4 million cu. ft. per day of 9 9 . 9 + % hydrogen from an 80% hydrogen feed will operate at about 12V 2 cents per million cu. ft., not including return on investment and feed cost. Investment is estimated to be about $175 per million-cu. ft.-per-day of hydrogen capacity.
