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1. 发明授权

US3900615A Process for treating wood 失效
公开(公告)号：US3900615A
公开(公告)日：1975-08-19
申请号：US29746472
申请日：1972-10-13
申请人： DOW CHEMICAL CO
发明人： DUNN JR JAMES L
IPC分类号： B27K3/02 , B27K3/08 , B27K3/40
CPC分类号： B27K3/40 , B27K3/0207 , B27K3/0278 , B27K3/08 , B27K3/36 , B27K5/001
摘要： Lumber and other wood products are impregnated with one or more additives such as preservatives, fire retardants, dyes, and the like, using a halogenated hydrocarbon solvent as the sole heat transfer medium and carrier by heating the wood with hot solvent vapor, soaking the hot wood in a pressurized solvent solution of the additive, and releasing the pressure after removing the solvent solution from contact with the wood, thereby causing most of the solvent in the wood to flash off. The process is preferably run in essentially continuous manner by operating three or more interconnected treating chambers simultaneously in offset cycle sequence using a common source of boiling treating solution under moderate superatmospheric pressure.

2. 发明授权

US3408748A Drying and recovery process 失效
标题翻译：干燥和回收过程
公开(公告)号：US3408748A
公开(公告)日：1968-11-05
申请号：US57294866
申请日：1966-08-17
申请人： DOW CHEMICAL CO
发明人： DUNN JR JAMES L
IPC分类号： F26B13/10 , F26B21/14
CPC分类号： F26B21/14 , F26B13/10

3. 发明授权

US3871821A Package dye process 失效
标题翻译：包装染色工艺
公开(公告)号：US3871821A
公开(公告)日：1975-03-18
申请号：US42829973
申请日：1973-12-26
申请人： DOW CHEMICAL CO
发明人： WINN WILLIAM D , DUNN JR JAMES L
IPC分类号： D06B9/02 , B05C8/02
CPC分类号： D06B9/02
摘要： A method for kier-dyeing packaged yarn in a discontinuous manner employing a chlorinated solvent as the sole fluid to evacuate the air from the kier and to heat the yarn to achieve dye fixation temperature as the principal vehicle for the dye formulation, and as the means for recovering residual solvent from the dyed yarn packages and kier. The method is practiced by subjecting a kier, which has been loaded with packages of yarn to be dyed, to an initial vacuum followed by introduction of vapors of a chlorinated solvent into the bottom of the kier until the kier is filled with such vapors and substantially all air has been evacuated, discontinuing the exhaustion under vacuum but continuing the introduction of vapors to the kier until the contents achieve the temperature of the vapors, introducing a solvent dyebath into the kier and circulating the dyebath through the kier until the dyebath is spent, removing the spent dyebath from the kier under the pressure of solvent vapors, and circulating the vapors to a heater to superheat the vapors, returning the vapors to the kier, condensing vapors in excess of those necessary to fill the kier and superheater, continuing the circulation of vapors until the solvent is substantially completely removed from the yarn in the kier. Residual solvent is removed by evacuating and purging the kier with an inert gas. Thereafter, the kier is cooled to enable removal of the yarn packages. Finally, solvent is recovered from the spent dyebath and returned to storage.

4. 发明授权

US2866830A Fixed bed oxychlorination of hydrocarbons 失效
标题翻译：固定床氧氯化烃
公开(公告)号：US2866830A
公开(公告)日：1958-12-30
申请号：US58825356
申请日：1956-05-31
申请人： DOW CHEMICAL CO
发明人： DUNN JR JAMES L , POSEY JR BOB
IPC分类号： C07C17/152 , C07C17/156
CPC分类号： C07C17/152 , C07C17/156

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